Estimation of wheat nitrogen status under drip irrigation with canopy spectral indices

doi:10.1017/S0021859614001014

CORC > 中国农业科学院 > 作物科学研究所

	Estimation of wheat nitrogen status under drip irrigation with canopy spectral indices
	Jin, X. L.1,2; Diao, W. Y.3; Xiao, C. H.3; Wang, F. Y.4; Chen, B.4; Wang, K. R.1,3; Li, S. -K.1,3
刊名	JOURNAL OF AGRICULTURAL SCIENCE
	2015
卷号	153 期号:7 页码:1281-1291
ISSN号	0021-8596
DOI	10.1017/S0021859614001014
通讯作者	Jin, X. L.
英文摘要	Crop nitrogen (N) status is an important indicator of crop health and predictor of subsequent crop yield. The present study was conducted to analyse the relationships between nitrogen nutrition index (NNI), nitrogen biomass difference (NB) and spectral indices in wheat, and then attempt to improve field N management. Spectral indices and concurrent sample N and biomass parameters were obtained from the Shihezi University experimental site in Xinjiang, China during 2009 and 2010. The results showed that all spectral indices were significantly correlated with NNI. Regression functions with the highest determination coefficient (R-2) and the lowest root mean square error (RMSE) were used to improve prediction of NNI, and then the selected spectral index was used to estimate NNI and NB. The strongest relationships were observed for the products of modified normalized difference 705 x biomass dry weight (BND705) and the enhanced vegetation index 2 (EVI2) for estimating NNI. There were also strong relationships between the NNI and the normalized NNI (NNI) as well as between NNI and NB, with a linear relationship between NB and the spectral index BND705 and a linear relationship between NB and the spectral index EVI2. These results indicated that BND705 and EVI2 can be used to improve the accuracy of NNI estimation, and the correlations of NB and NNI with BND705 and EVI2 can be used to further improve field N management in wheat.
学科主题	Agriculture, Multidisciplinary
语种	英语
出版者	CAMBRIDGE UNIV PRESS
WOS记录号	WOS:000359288500011
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/4666]
专题	作物科学研究所
作者单位	1.Chinese Acad Agr Sci, Inst Crop Sci, Minist Agr, Key Lab Crop Physiol & Prod, Beijing 100081, Peoples R China 2.Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China 3.Key Lab Oasis Ecol Agr Xinjiang Construct Crops, Shihezi 832003, Peoples R China 4.Xinjiang Acad Agr Reclamat Sci, Inst Cotton, Shihezi 832000, Peoples R China
推荐引用方式 GB/T 7714	Jin, X. L.,Diao, W. Y.,Xiao, C. H.,et al. Estimation of wheat nitrogen status under drip irrigation with canopy spectral indices[J]. JOURNAL OF AGRICULTURAL SCIENCE,2015,153(7):1281-1291.
APA	Jin, X. L..,Diao, W. Y..,Xiao, C. H..,Wang, F. Y..,Chen, B..,...&Li, S. -K..(2015).Estimation of wheat nitrogen status under drip irrigation with canopy spectral indices.JOURNAL OF AGRICULTURAL SCIENCE,153(7),1281-1291.
MLA	Jin, X. L.,et al."Estimation of wheat nitrogen status under drip irrigation with canopy spectral indices".JOURNAL OF AGRICULTURAL SCIENCE 153.7(2015):1281-1291.