{"id":5061,"date":"2025-03-07T11:53:02","date_gmt":"2025-03-07T09:53:02","guid":{"rendered":"https:\/\/weagro.ua\/blog\/indici-de-vegetatie-in-agricultura-ndvi-ndre-msavi-ndmi\/"},"modified":"2026-03-24T10:42:40","modified_gmt":"2026-03-24T08:42:40","slug":"indici-de-vegetatie-in-agricultura-ndvi-ndre-msavi-ndmi","status":"publish","type":"post","link":"https:\/\/weagro.ua\/ro\/blog\/indici-de-vegetatie-in-agricultura-ndvi-ndre-msavi-ndmi\/","title":{"rendered":"Indici de vegeta\u021bie \u00een agricultur\u0103: NDVI, NDRE, MSAVI, NDMI"},"content":{"rendered":"<p>Indicii de vegeta\u021bie NDRE, MSAVI, NDMI \u0219i NDVI sunt instrumente puternice pentru monitorizarea st\u0103rii vegeta\u021biei \u00een agricultur\u0103. \u00cen acest articol ve\u021bi afla ce \u00eenseamn\u0103 acestea, cum se calculeaz\u0103 \u0219i cum sunt utilizate pentru evaluarea s\u0103n\u0103t\u0103\u021bii culturilor. Acest lucru va fi util fermierilor care doresc s\u0103-\u0219i \u00eembun\u0103t\u0103\u021beasc\u0103 eficien\u021ba gestion\u0103rii c\u00e2mpurilor folosind tehnologii digitale.  <\/p>\n\n<h2 class=\"wp-block-heading\">Ce sunt indicii de vegeta\u021bie<\/h2>\n\n<p>NDRE, MSAVI, NDMI \u0219i NDVI sunt indicatori care se calculeaz\u0103 pe baza datelor de teledetec\u021bie \u0219i permit evaluarea st\u0103rii covorului vegetal. Ace\u0219tia iau \u00een considerare capacitatea de reflec\u021bie a plantelor \u00een diferite intervale ale spectrului electromagnetic, \u00een special \u00een zonele vizibile \u0219i infraro\u0219u apropiat. <\/p>\n\n<p>Utilizarea indicatorilor permite:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>identificarea zonelor problematice ale c\u00e2mpului;<\/li>\n\n\n\n<li>optimizarea utiliz\u0103rii resurselor (\u00eengr\u0103\u0219\u0103minte, ap\u0103, pesticide);<\/li>\n\n\n\n<li>prognozarea recoltei;<\/li>\n\n\n\n<li>planificarea recolt\u0103rii.<\/li>\n<\/ul>\n\n<p>Calculul indicilor de vegeta\u021bie se bazeaz\u0103 pe faptul c\u0103 vegeta\u021bia s\u0103n\u0103toas\u0103 are caracteristici specifice de reflec\u021bie \u00een diferite intervale spectrale. Frunzele verzi con\u021bin pigmen\u021bi (clorofil\u0103, carotenoizi, xantofile) care absorb lumina predominant \u00een zona albastr\u0103 \u0219i ro\u0219ie a spectrului pentru fotosintez\u0103. \u00cen acela\u0219i timp, intervalul infraro\u0219u apropiat este reflectat activ de covor, ceea ce este legat de caracteristicile structurii interne a frunzei.  <\/p>\n\n<p>C\u00e2nd plantele sufer\u0103 de stres (cum ar fi seceta, deficien\u021ba de nutrien\u021bi, boli, d\u0103un\u0103tori), con\u021binutul de clorofil\u0103 scade \u0219i covorul \u00eencepe s\u0103 reflecte mai mult\u0103 lumin\u0103 ro\u0219ie. \u00cen consecin\u021b\u0103, absorb\u021bia \u00een zonele ro\u0219ii \u0219i albastre scade \u0219i cre\u0219te reflec\u021bia \u00een zonele verzi \u0219i infraro\u0219u apropiat ale spectrului. Aceste modific\u0103ri pot fi detectate folosind imagini satelitare \u0219i utilizate pentru calcul.  <\/p>\n\n<p>Exist\u0103 mul\u021bi indici de vegeta\u021bie diferi\u021bi, fiecare av\u00e2nd avantajele \u0219i limit\u0103rile sale. S\u0103 analiz\u0103m \u00een detaliu caracteristicile celor patru principale. <\/p>\n\n<p><em>Citi\u021bi de asemenea: <\/em><a href=\"https:\/\/weagro.ua\/blog\/dystanczijne-zonduvannya-zemli-vydy-ta-perspektyvy\/\"><em>Teledetec\u021bia P\u0103m\u00e2ntului: tipuri \u0219i perspective<\/em><\/a><\/p>\n\n<h2 class=\"wp-block-heading\">Indicele de vegeta\u021bie NDVI<\/h2>\n\n<p>NDVI este indicele de vegeta\u021bie normalizat diferen\u021bial. Acest indicator evalueaz\u0103 cantitatea de biomas\u0103 fotosintetic\u0103 activ\u0103. Vegeta\u021bia s\u0103n\u0103toas\u0103 absoarbe cea mai mare parte a luminii vizibile \u0219i reflect\u0103 o mare parte din radia\u021bia infraro\u0219ie apropiat\u0103. Indicatorul permite detectarea acestei diferen\u021be.   <\/p>\n\n<h3 class=\"wp-block-heading\">Valoarea indicelui NDVI<\/h3>\n\n<p>NDVI este unul dintre cei mai comuni indici pentru monitorizarea vegeta\u021biei. Avantajul s\u0103u este c\u0103 minimizeaz\u0103 impactul factorilor precum iluminarea, pantele, expunerea \u0219i altele. Indicatorul poate fi utilizat pentru evaluarea st\u0103rii plantelor \u00een aproape toate etapele de vegeta\u021bie.  <\/p>\n\n<p>Principalul motiv al popularit\u0103\u021bii acestui indicator este universalitatea sa. Indicele de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103 poate fi aplicat at\u00e2t \u00een analiza unui singur c\u00e2mp, c\u00e2t \u0219i a unei \u00eentregi regiuni. Permite nu doar evaluarea situa\u021biei curente, ci \u0219i urm\u0103rirea dinamicii schimb\u0103rilor pe parcursul sezonului sau mai multor ani.  <\/p>\n\n<p>Cu ajutorul Indicelui de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103 se pot rezolva multe sarcini practice ale agriculturii de precizie, cum ar fi:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>determinarea zonelor cu productivitate diferit\u0103 \u00een interiorul c\u00e2mpului;<\/li>\n\n\n\n<li>identificarea zonelor care necesit\u0103 investiga\u021bii suplimentare;<\/li>\n\n\n\n<li>optimizarea prelev\u0103rii probelor de sol;<\/li>\n\n\n\n<li>detectarea timpurie a problemelor \u00een c\u00e2mp (boli, d\u0103un\u0103tori, buruieni);<\/li>\n\n\n\n<li>crearea h\u0103r\u021bilor pentru \u00eens\u0103m\u00e2n\u021barea diferen\u021biat\u0103 \u0219i aplicarea \u00eengr\u0103\u0219\u0103mintelor;<\/li>\n\n\n\n<li>evaluarea eficien\u021bei m\u0103surilor agrotehnice.<\/li>\n<\/ul>\n\n<p>Indicele de vegeta\u021bie NDVI a devenit un standard \u00een industria agriculturii de precizie datorit\u0103 fiabilit\u0103\u021bii, simplit\u0103\u021bii de interpretare \u0219i disponibilit\u0103\u021bii datelor necesare. Majoritatea sateli\u021bilor gratui\u021bi (Landsat, Sentinel) \u0219i comerciali au senzori care suport\u0103 calculul indicatorului. <\/p>\n\n<h3 class=\"wp-block-heading\">Calculul NDVI<\/h3>\n\n<p>Formula NDVI: (NIR \u2014 RED) \/ (NIR + RED), unde NIR \u2014 reflec\u021bia \u00een intervalul infraro\u0219u apropiat, RED \u2014 reflec\u021bia \u00een intervalul ro\u0219u.<\/p>\n\n<h3 class=\"wp-block-heading\">Scala NDVI<\/h3>\n\n<p>Valorile indicatorului se afl\u0103 \u00een intervalul de la -1 la 1. Interpretarea scalei NDVI: <\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>NDVI<\/strong><\/td><td><strong>Starea vegeta\u021biei<\/strong><\/td><\/tr><tr><td>&lt;0<\/td><td>Absen\u021ba vegeta\u021biei sau suprafa\u021b\u0103 neviabil\u0103, precum apa, z\u0103pada, piatra<\/td><\/tr><tr><td>0\u20130,2<\/td><td>Vegeta\u021bie moart\u0103 sau sol gol<\/td><\/tr><tr><td>0,2\u20130,5<\/td><td>Iarb\u0103, arbu\u0219ti<\/td><\/tr><tr><td>0,5\u20131<\/td><td>Vegeta\u021bie dens\u0103, p\u0103duri<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h3 class=\"wp-block-heading\">Harta NDVI<\/h3>\n\n<p>H\u0103r\u021bile NDVI arat\u0103 densitatea \u0219i starea vegeta\u021biei. Culoarea verde corespunde vegeta\u021biei dense, galben \u0219i verde deschis indic\u0103 vegeta\u021bie rar\u0103, maro \u0219i maro \u00eenchis &#8211; sol gol. Valorile negative sunt afi\u0219ate \u00een albastru (ap\u0103, z\u0103pad\u0103).  <\/p>\n\n<h3 class=\"wp-block-heading\">Cum sunt utilizate datele NDVI \u00een agricultur\u0103<\/h3>\n\n<p>Indicele de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103 \u00een agricultur\u0103 este utilizat pentru:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>identificarea zonelor problematice \u00een c\u00e2mp;<\/li>\n\n\n\n<li>evaluarea st\u0103rii vegeta\u021biei \u0219i prognozarea recoltei;<\/li>\n\n\n\n<li>planificarea fertiliz\u0103rii plantelor;<\/li>\n\n\n\n<li>identificarea zonelor care necesit\u0103 irigare;<\/li>\n\n\n\n<li>monitorizarea dezvolt\u0103rii culturii pe parcursul sezonului.<\/li>\n<\/ul>\n\n<p>NDVI este un instrument fiabil de monitorizare a c\u00e2mpurilor, care permite produc\u0103torilor agricoli s\u0103 ia decizii fundamentate. Integrarea sa \u00een sistemele de agricultur\u0103 de precizie ajut\u0103 la cre\u0219terea eficien\u021bei fermei. <\/p>\n\n<p><em>Utilizarea indicilor de vegeta\u021bie devine \u0219i mai accesibil\u0103 datorit\u0103 serviciului nostru <\/em><a href=\"https:\/\/weagro.ua\/ro\/\"><em>WEAGRO<\/em><\/a><em>, care permite achizi\u021bionarea echipamentelor \u0219i tehnologiilor necesare pentru monitorizarea c\u00e2mpurilor cu plata am\u00e2nat\u0103. Acest lucru este deosebit de relevant pentru fermele mici \u0219i mijlocii care doresc s\u0103 implementeze inova\u021bii, dar au acces limitat la finan\u021bare.<\/em><\/p>\n<div class=\"banner banner--content\">\n    <div class=\"banner__inner\">\n                    <img decoding=\"async\" data-src=\"https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2024\/05\/banner-content.jpg.webp\"  class=\"banner__bg lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 780px; --smush-placeholder-aspect-ratio: 780\/222;\" \/>\n                <div class=\"banner__content\">\n            <div class=\"banner__text\">\n                <h4>Deveni\u021bi partener<\/h4>\n<h2>Credit agricol pentru agrobusiness<\/h2>            <\/div>\n                                                \t\t\t\t\t\t\t        <\/div>\n    <\/div>\n<\/div>\n<h2 class=\"wp-block-heading\">Indicele de vegeta\u021bie NDRE<\/h2>\n\n<p>Indicele diferen\u021bial normalizat Red Edge (NDRE) ia \u00een considerare reflec\u021bia \u00een marginea ro\u0219ie a spectrului, care este str\u00e2ns legat\u0103 de con\u021binutul de clorofil\u0103. NDRE este sensibil la modific\u0103rile concentra\u021biei acesteia la densitate ridicat\u0103 a vegeta\u021biei. <\/p>\n\n<h3 class=\"wp-block-heading\">Valoarea indicelui NDRE<\/h3>\n\n<p>Indicele NDRE ajut\u0103 la evaluarea con\u021binutului de azot din plante, deoarece exist\u0103 o leg\u0103tur\u0103 puternic\u0103 \u00eentre concentra\u021bia de clorofil\u0103 \u0219i azot. Spre deosebire de Indicele de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103, Indicele Normalizat de Diferen\u021b\u0103 Red Edge \u00ee\u0219i p\u0103streaz\u0103 sensibilitatea la schimb\u0103rile din plante chiar \u0219i la sf\u00e2r\u0219itul perioadei de vegeta\u021bie. <\/p>\n\n<p>Avantajele utiliz\u0103rii:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>o mai bun\u0103 corela\u021bie cu con\u021binutul de azot din plante comparativ cu NDVI;<\/li>\n\n\n\n<li>posibilitatea detect\u0103rii timpurii a deficien\u021bei de azot;<\/li>\n\n\n\n<li>eficien\u021b\u0103 ridicat\u0103 pentru culturile cu mas\u0103 verde mare (rapi\u021b\u0103 de toamn\u0103, gr\u00e2u);<\/li>\n\n\n\n<li>men\u021binerea sensibilit\u0103\u021bii \u00een stadiile t\u00e2rzii de vegeta\u021bie;<\/li>\n\n\n\n<li>utilizarea \u00een evaluarea calit\u0103\u021bii produc\u021biei (con\u021binutul de proteine din cereale).<\/li>\n<\/ul>\n\n<p>Principalul dezavantaj al NDRE este r\u0103sp\u00e2ndirea mai redus\u0103 a indicatorului \u0219i costul mai ridicat al datelor. La calcul sunt necesare imagini cu marginea ro\u0219ie a spectrului (Red Edge), care nu sunt disponibile la to\u021bi sateli\u021bii. Cele mai potrivite pentru aceasta sunt sateli\u021bii europeni Sentinel-2 \u0219i Worldview-2, 3. Datele gratuite Landsat nu sunt potrivite.   <\/p>\n\n<p>O alt\u0103 nuan\u021b\u0103 a NDRE este necesitatea unei selec\u021bii mai precise a pixelilor pentru analiz\u0103. Dac\u0103 \u00een imagine sunt nori, umbrele lor, corpuri de ap\u0103 sau alte obiecte, acestea distorsioneaz\u0103 mai puternic valorile NDRE dec\u00e2t NDVI. Prin urmare, pentru calcul este mai bine s\u0103 se utilizeze m\u0103\u0219ti care elimin\u0103 pixelii nedori\u021bi.  <\/p>\n\n<p>\u00cen general, NDRE este un indicator promi\u021b\u0103tor pentru analiza aprofundat\u0103 a st\u0103rii plantelor, dar din cauza disponibilit\u0103\u021bii limitate a datelor, este deocamdat\u0103 mai rar utilizat \u00een agricultura de precizie comparativ cu NDVI.<\/p>\n\n<h3 class=\"wp-block-heading\">Calculul NDRE<\/h3>\n\n<p>Formula de calcul NDRE: (NIR \u2014 RE) \/ (NIR + RE), unde NIR \u2014 reflec\u021bia \u00een intervalul infraro\u0219u apropiat, RE \u2014 reflec\u021bia \u00een marginea ro\u0219ie a spectrului.<\/p>\n\n<h3 class=\"wp-block-heading\">Scala NDRE<\/h3>\n\n<p>Scala Indicelui Normalizat de Diferen\u021b\u0103 Red Edge este similar\u0103 cu scala Indicelui de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103 \u0219i se afl\u0103 \u00een intervalul de la -1 la 1. Interpretarea tipic\u0103 a valorilor: <\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>NDRE<\/strong><\/td><td><strong>Starea vegeta\u021biei<\/strong><\/td><\/tr><tr><td>&lt;0<\/td><td>Sol, f\u0103r\u0103 vegeta\u021bie<\/td><\/tr><tr><td>0\u20130,3<\/td><td>Vegeta\u021bie rar\u0103, stadii timpurii de dezvoltare a culturii<\/td><\/tr><tr><td>0,3\u20130,6<\/td><td>Densitate medie a vegeta\u021biei<\/td><\/tr><tr><td>0,6\u20131<\/td><td>Densitate ridicat\u0103 a vegeta\u021biei, stadii t\u00e2rzii de vegeta\u021bie<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h3 class=\"wp-block-heading\">H\u0103r\u021bi \u0219i grafice NDRE<\/h3>\n\n<p>Harta NDRE permite evaluarea vizual\u0103 a variabilit\u0103\u021bii con\u021binutului de azot \u00een interiorul c\u00e2mpului. Graficul poate urm\u0103ri dinamica con\u021binutului de clorofil\u0103 pe parcursul sezonului \u0219i identifica perioadele c\u00e2nd plantele sufer\u0103 de stres. <\/p>\n\n<h3 class=\"wp-block-heading\">Cum sunt utilizate datele NDRE \u00een agricultur\u0103<\/h3>\n\n<p>NDRE este utilizat pentru:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>evaluarea aprovizion\u0103rii plantelor cu azot;<\/li>\n\n\n\n<li>crearea h\u0103r\u021bilor pentru aplicarea diferen\u021biat\u0103 a \u00eengr\u0103\u0219\u0103mintelor cu azot;<\/li>\n\n\n\n<li>monitorizarea matur\u0103rii culturilor;<\/li>\n\n\n\n<li>monitorizarea culturilor cu frunzi\u0219 dens (floarea-soarelui, porumb).<\/li>\n<\/ul>\n\n<p>Implementarea tehnologiilor de analiz\u0103 a indicilor de vegeta\u021bie necesit\u0103 investi\u021bii, dar datorit\u0103 solu\u021biilor financiare moderne, precum serviciul nostru WEAGRO, fermierii pot ob\u021bine echipamentele necesare f\u0103r\u0103 o presiune semnificativ\u0103 asupra capitalului circulant. Serviciul online ofer\u0103 procesare rapid\u0103 a pl\u0103\u021bilor am\u00e2nate pentru agricultur\u0103 f\u0103r\u0103 documente suplimentare, f\u0103c\u00e2nd tehnologiile agriculturii de precizie mai accesibile. <\/p>\n\n<h2 class=\"wp-block-heading\">Indicele de vegeta\u021bie MSAVI<\/h2>\n\n<p>MSAVI (Modified Soil Adjusted Vegetation Index) \u2014 indicele de vegeta\u021bie modificat ajustat la sol. Este util \u00een etapele ini\u021biale de dezvoltare a plantelor, c\u00e2nd o mare parte din suprafa\u021b\u0103 este ocupat\u0103 de sol descoperit. <\/p>\n\n<p>MSAVI permite analiza st\u0103rii vegeta\u021biei chiar \u0219i \u00een stadiile timpurii de vegeta\u021bie, c\u00e2nd acoperirea proiectiv\u0103 este \u00eenc\u0103 nesemnificativ\u0103. Prin corectarea influen\u021bei solului, indicatorul evalueaz\u0103 mai precis activitatea fotosintetic\u0103 comparativ cu NDVI. <\/p>\n\n<p>Avantaje:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>reducerea zgomotului legat de reflec\u021bia solului;<\/li>\n\n\n\n<li>cre\u0219terea contrastului \u00eentre sol \u0219i vegeta\u021bie;<\/li>\n\n\n\n<li>cre\u0219terea intervalului de valori comparativ cu Indicele de Vegeta\u021bie cu Diferen\u021b\u0103 Normalizat\u0103;<\/li>\n\n\n\n<li>posibilitatea de a lucra la acoperire proiectiv\u0103 sc\u0103zut\u0103 (&lt; 40 %);<\/li>\n\n\n\n<li>eficien\u021b\u0103 pentru analiza culturilor \u00een stadiile timpurii de dezvoltare.<\/li>\n<\/ul>\n\n<p>Datorit\u0103 acestor caracteristici, MSAVI este utilizat cu succes \u00een monitorizarea culturilor, livezilor \u0219i viilor, \u00een special \u00een regiunile cu acoperire vegetal\u0103 insuficient\u0103. Este, de asemenea, util \u00een analiza r\u0103s\u0103ririi culturilor, evaluarea eficien\u021bei sem\u0103n\u0103torilor, controlul buruienilor. <\/p>\n\n<p>Cu toate acestea, exist\u0103 \u0219i dezavantaje:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>sunt necesare imagini cu rezolu\u021bie \u00eenalt\u0103 (&lt;10 m);<\/li>\n\n\n\n<li>sensibilitate mai redus\u0103 \u00een stadiile t\u00e2rzii de dezvoltare a culturilor;<\/li>\n\n\n\n<li>popularitate mai sc\u0103zut\u0103 comparativ cu NDVI, NDRE.<\/li>\n<\/ul>\n\n<p>Din cauza acestor factori, MSAVI este mai rar utilizat \u00een sistemele comerciale de agromonitorizare. Dar pentru scopuri \u0219tiin\u021bifice \u0219i sarcini specifice care necesit\u0103 eliminarea influen\u021bei solului, r\u0103m\u00e2ne relevant. <\/p>\n\n<h3 class=\"wp-block-heading\">Calculul MSAVI<\/h3>\n\n<p>Formula de calcul: MSAVI = (2 \u0445 NIR + 1 \u2014 sqrt((2 \u0445 NIR + 1)^2 \u2014 8 \u22c5 (NIR \u2014 RED))) \/ 2, unde:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>NIR \u2014 reflec\u021bia \u00een intervalul infraro\u0219u apropiat;<\/li>\n\n\n\n<li>RED \u2014 reflec\u021bia \u00een intervalul ro\u0219u;<\/li>\n\n\n\n<li>sqrt \u2014 r\u0103d\u0103cin\u0103 p\u0103trat\u0103;<\/li>\n\n\n\n<li>^ \u2014 ridicare la putere.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Scala MSAVI<\/h3>\n\n<p>Pe scala MSAVI de la -1 la 1 valorile sunt interpretate astfel:<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>MSAVI<\/strong><\/td><td><strong>Starea vegeta\u021biei<\/strong><\/td><\/tr><tr><td>-1\u20130,2<\/td><td>Sol f\u0103r\u0103 vegeta\u021bie<\/td><\/tr><tr><td>0,2\u20130,4<\/td><td>Acoperire vegetal\u0103 foarte rar\u0103, r\u0103s\u0103rire<\/td><\/tr><tr><td>0,4\u20130,6<\/td><td>Acoperire proiectiv\u0103 moderat\u0103, vegeta\u021bie timpurie<\/td><\/tr><tr><td>&gt; 0,6<\/td><td>Acoperire vegetal\u0103 dens\u0103, pentru analiz\u0103 este mai bun NDVI<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h3 class=\"wp-block-heading\">H\u0103r\u021bi \u0219i grafice MSAVI<\/h3>\n\n<p>Harta MSAVI permite identificarea zonelor c\u00e2mpului unde r\u0103s\u0103rirea este neuniform\u0103 sau inhibat\u0103. Graficele arat\u0103 dinamica dezvolt\u0103rii culturilor \u00een etapele ini\u021biale de vegeta\u021bie. <\/p>\n\n<h3 class=\"wp-block-heading\">Cum sunt utilizate datele MSAVI \u00een agricultur\u0103<\/h3>\n\n<p>MSAVI este utilizat pentru:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>analiza r\u0103s\u0103ririi culturilor;<\/li>\n\n\n\n<li>identificarea zonelor cu r\u0103s\u0103rire neuniform\u0103;<\/li>\n\n\n\n<li>monitorizarea influen\u021bei solului asupra dezvolt\u0103rii plantelor;<\/li>\n\n\n\n<li>prognozarea timpurie a recoltei.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Indicele de vegeta\u021bie NDMI<\/h2>\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"585\" data-src=\"http:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1-1024x585.png.webp\" alt=\"Indicele de vegeta&#x21B;ie NDMI\" class=\"wp-image-2043 lazyload\" data-srcset=\"https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1-1024x585.png.webp 1024w, https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1-300x172.png.webp 300w, https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1-768x439.png.webp 768w, https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1-1536x878.png.webp 1536w, https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2025\/02\/07-stattya-3-1.png.webp 1861w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/585;\" \/><\/figure>\n\n<p>NDMI (Normalized Difference Moisture Index) \u2014 indicele de umiditate diferen\u021bial normalizat. Este sensibil la modific\u0103rile con\u021binutului de ap\u0103 din \u021besuturile plantelor \u0219i sol. <\/p>\n\n<h3 class=\"wp-block-heading\">Valoarea indicelui NDMI<\/h3>\n\n<p>NDMI ajut\u0103 la detectarea stresului hidric al plantelor. Spre deosebire de NDVI, NDMI utilizeaz\u0103 intervalele infraro\u0219u apropiat \u0219i mediu. Acest lucru permite evaluarea con\u021binutului de ap\u0103 din frunz\u0103, iar rezultatul depinde mai pu\u021bin de compozi\u021bia speciilor de vegeta\u021bie.  <\/p>\n\n<p>Avantajele utiliz\u0103rii NDMI:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>sensibilitate ridicat\u0103 la modific\u0103rile con\u021binutului de ap\u0103 din plante;<\/li>\n\n\n\n<li>posibilitatea detect\u0103rii timpurii a stresului hidric;<\/li>\n\n\n\n<li>dependen\u021b\u0103 slab\u0103 de caracteristicile specifice ale culturilor;<\/li>\n\n\n\n<li>eficien\u021b\u0103 \u00een evaluarea necesit\u0103\u021bii irig\u0103rii;<\/li>\n\n\n\n<li>aplicare \u00een analiza riscurilor de incendiu, secet\u0103.<\/li>\n<\/ul>\n\n<p>Printre dezavantajele NDMI se num\u0103r\u0103 sensibilitatea la perturba\u021biile atmosferice, \u00een special nori \u0219i cea\u021b\u0103. Pentru calculul precis al NDMI este necesar\u0103 o corec\u021bie atmosferic\u0103 de calitate a imaginilor. De asemenea, NDMI nu poate \u00eentotdeauna s\u0103 disting\u0103 \u00eentre umiditatea solului \u0219i cea a plantelor, ceea ce reduce precizia \u00een cazul acoperirii rare.  <\/p>\n\n<p>\u00cen general, NDMI este un indice promi\u021b\u0103tor pentru regiunile cu regim de umiditate variabil, predispuse la secet\u0103 \u0219i deficit de umiditate. Completeaz\u0103 informa\u021biile ob\u021binute prin NDVI \u0219i NDRE, permi\u021b\u00e2nd un control mai bun al aprovizion\u0103rii cu ap\u0103 a culturilor. <\/p>\n\n<p><em>Citi\u021bi de asemenea: <\/em><a href=\"https:\/\/weagro.ua\/blog\/drony-dlya-silskogo-gospodarstva-dlya-chogo-vony-i-yak-obraty\/\"><em>Drone pentru agricultur\u0103: pentru ce sunt \u0219i cum s\u0103 alege\u021bi<\/em><\/a><\/p>\n\n<h3 class=\"wp-block-heading\">Calculul NDMI<\/h3>\n\n<p>Formula de calcul: NDMI = (NIR \u2014 SWIR) \/ (NIR + SWIR), unde NIR \u2014 reflec\u021bia \u00een intervalul infraro\u0219u apropiat, SWIR \u2014 reflec\u021bia \u00een intervalul infraro\u0219u mediu.<\/p>\n\n<h3 class=\"wp-block-heading\">Scala NDMI<\/h3>\n\n<p>Scala se afl\u0103 \u00een intervalul de la -1 la 1. Valori tipice: <\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>NDMI<\/strong><\/td><td><strong>Starea umidit\u0103\u021bii<\/strong><\/td><\/tr><tr><td>&lt; -0,1<\/td><td>Umiditate foarte sc\u0103zut\u0103, posibil sol f\u0103r\u0103 plante<\/td><\/tr><tr><td>-0,1\u20130,1<\/td><td>Umiditate sc\u0103zut\u0103, stres hidric moderat<\/td><\/tr><tr><td>0,1\u20130,3<\/td><td>Umiditate medie, plantele nu sufer\u0103 de stres<\/td><\/tr><tr><td>0,3\u20130,5<\/td><td>Umiditate ridicat\u0103, posibil\u0103 supra\u00eenc\u0103rcare cu ap\u0103<\/td><\/tr><tr><td>&gt; 0,5<\/td><td>Umiditate foarte ridicat\u0103, suprafa\u021b\u0103 de ap\u0103 liber\u0103<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h3 class=\"wp-block-heading\">H\u0103r\u021bi \u0219i grafice NDMI<\/h3>\n\n<p>Harta indicelui NDMI arat\u0103 distribu\u021bia spa\u021bial\u0103 a con\u021binutului de ap\u0103 \u00een covorul vegetal. Graficul NDMI ilustreaz\u0103 cum s-a modificat umiditatea pe parcursul vegeta\u021biei. Acest lucru permite s\u0103 se vad\u0103 \u00een ce perioade plantele au suferit de stres hidric.  <\/p>\n\n<h3 class=\"wp-block-heading\">Cum sunt utilizate datele NDMI \u00een agricultur\u0103<\/h3>\n\n<p>NDMI este utilizat pentru:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>detectarea stresului hidric;<\/li>\n\n\n\n<li>optimizarea irig\u0103rii;<\/li>\n\n\n\n<li>identificarea zonelor suprasaturate;<\/li>\n\n\n\n<li>monitorizarea secetei;<\/li>\n\n\n\n<li>evaluarea pericolului de incendiu.<\/li>\n<\/ul>\n\n<p>NDMI completeaz\u0103 al\u021bi indici de vegeta\u021bie \u0219i permite caracterizarea mai complet\u0103 a st\u0103rii culturilor, lu\u00e2nd \u00een considerare aprovizionarea cu ap\u0103.<\/p>\n\n<h2 class=\"wp-block-heading\">Concluzie<\/h2>\n\n<p>Indicii de vegeta\u021bie sunt instrumente puternice pentru monitorizarea la distan\u021b\u0103 a culturilor. Acestea permit evaluarea st\u0103rii vegeta\u021biei, con\u021binutului de clorofil\u0103, azot \u0219i ap\u0103 din frunze pe baza imaginilor satelitare. <\/p>\n\n<p>Fiecare dintre indici are caracteristicile \u0219i avantajele sale:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>NDVI \u2014 cel mai universal \u0219i r\u0103sp\u00e2ndit;<\/li>\n\n\n\n<li>NDRE \u2014 mai potrivit pentru evaluarea con\u021binutului de azot;<\/li>\n\n\n\n<li>MSAVI \u2014 caracterizeaz\u0103 mai precis vegeta\u021bia \u00een etapele timpurii de dezvoltare;<\/li>\n\n\n\n<li>NDMI \u2014 permite diagnosticarea stresului hidric.<\/li>\n<\/ul>\n\n<p><em>Cu ajutorul serviciului nostru financiar <\/em><a href=\"https:\/\/weagro.ua\/ro\/\"><em>WEAGRO<\/em><\/a><em>, fermierii ucraineni pot implementa mai eficient sisteme de monitorizare a culturilor. Posibilitatea de a achizi\u021biona echipamentele necesare cu plata am\u00e2nat\u0103 f\u0103r\u0103 garan\u021bii \u0219i documente suplimentare permite fermelor de orice dimensiune s\u0103 utilizeze avantajele indicilor de vegeta\u021bie pentru a-\u0219i cre\u0219te eficien\u021ba produc\u021biei.<\/em><\/p>\n<div class=\"banner banner--content\">\n    <div class=\"banner__inner\">\n                    <img decoding=\"async\" data-src=\"https:\/\/weagro.ua\/wp-content\/webp-express\/webp-images\/uploads\/2024\/05\/banner-content.jpg.webp\"  class=\"banner__bg lazyload\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 780px; --smush-placeholder-aspect-ratio: 780\/222;\" \/>\n                <div class=\"banner__content\">\n            <div class=\"banner__text\">\n                <h4>Cump\u0103ra\u021bi acum, pl\u0103ti\u021bi mai t\u00e2rziu<\/h4>\n<h2>Plata \u00een rate agricole pentru produc\u0103torul agricol<\/h2>            <\/div>\n                                                \t\t\t\t\t\t\t        <\/div>\n    <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Indicii de vegeta\u021bie NDRE, MSAVI, NDMI \u0219i NDVI sunt instrumente puternice pentru monitorizarea st\u0103rii vegeta\u021biei \u00een agricultur\u0103. \u00cen acest articol ve\u021bi afla ce \u00eenseamn\u0103 acestea, cum se calculeaz\u0103 \u0219i cum sunt utilizate pentru evaluarea s\u0103n\u0103t\u0103\u021bii culturilor. Acest lucru va fi util fermierilor care doresc s\u0103-\u0219i \u00eembun\u0103t\u0103\u021beasc\u0103 eficien\u021ba gestion\u0103rii c\u00e2mpurilor folosind tehnologii digitale. Ce sunt indicii [&hellip;]<\/p>","protected":false},"author":11,"featured_media":5062,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[63],"tags":[],"class_list":["post-5061","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tehnologii"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Indici de vegeta\u021bie \u00een agricultur\u0103: NDVI, NDRE, MSAVI, NDMI - WEAGRO<\/title>\n<meta name=\"description\" content=\"Indicii NDVI, NDRE, MSAVI, NDMI \u00een agricultur\u0103: defini\u021bie, rol, calcul \u0219i particularit\u0103\u021bi de utilizare pentru monitorizarea st\u0103rii plantelor\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weagro.ua\/ro\/blog\/indici-de-vegetatie-in-agricultura-ndvi-ndre-msavi-ndmi\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Indici de vegeta\u021bie \u00een agricultur\u0103: NDVI, NDRE, MSAVI, NDMI - 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