|Table of Contents|

Predicting Model of Soybean Leaf Nitrogen Content by Leaf Reflectance Spectra under Different Nitrogen Supply Levels(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2010年04期
Page:
641-644
Research Field:
Publishing date:

Info

Title:
Predicting Model of Soybean Leaf Nitrogen Content by Leaf Reflectance Spectra under Different Nitrogen Supply Levels
Author(s):
SONG Ying-bo
Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences, Jiamusi 154007,Heilongjiang,China
Keywords:
Leaf nitrogen concentration; Leaf spectrum reflectance; Estimation model
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2010.04.0641
Abstract:
Through analyzing the relationships of nitrogen concentration in soybean leaf under different nitrogen supply levels with spectral reflectance, the sensitive wave bands and prediction functions of soybean leaf nitrogen concentration were worked out. The results showed that there existed higher significant correlations between spectra reflectance of four sensitive wave bands (530,550, 890, and 930 nm)and the leaf nitrogen content of soybean. After compared with those four vegetation indices, R2 of the NDVI was the best and RMSE was the smallest. The corresponding prediction model established by vegetation indices of NDVI was Y=-323.214×NDVI2 (890，530)+469.9307×NDVI (890，530)-165.021,the model was suitable for estimation of leaf nitrogen concentration at different growth stages of soybean.

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Last Update: 2014-09-14