Correlation between Spectrum Reflectance and Chlorophyll Content of Soybean Leaves under Different Nitrogen Level(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:

2012年01期

Page:

73-75,80

Research Field:

Publishing date:

Info

Title:

Correlation between Spectrum Reflectance and Chlorophyll Content of Soybean Leaves under Different Nitrogen Level

Author(s):

SHEN Xiao-hui¹; JIANG Cheng²; ZHANG Jing-tao¹; LIU Jing-qi¹; ZHAO Gui-fan¹; FENG Peng¹

1.Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences，Jiamusi 154007;?

2.College of Life Science，Jiamusi University，Jiamusi 154007，Heilongjiang，China

Keywords:

Soybean; Spectral reflectance; Chlorophyll content; Vegetation indices

PACS:

S565.1

DOI:

10.3969/j.issn.1000-9841.2012.01.016

Abstract:

Field trail with four nitrogen level of 0，30，60 and 90 kg·ha^-1(N₀，N₁，N₂ and N₃)was conducted，the leaf chlorophyll content and spectral response at flowering，podding and seed-filling of soybean were measured by Unispec pectrometer and SPAD-502 chlorophyll meter，respectively.Leaf spectral reflection declined with the increasing of applied N，and podding period of soybean was diagnosed as N sensitive stage by spectral reflection.Leaf chlorophyll content increased as the increasing of applied N.Vegetation index mND₇₀₅ showed significant positive correlation with chlorophyll content under all treatments，except that of N₀ at seed-filling.mSR₇₀₅ significant positively correlated with，while PSSRc significant negatively correlated with chlorophyll content under four N levels at flowering and podding.Results suggest that vegetation index mSR₇₀₅，mND₇₀₅ and PSSRc could be used as predictors for soybean leaf chlorophyll content and N levels.

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