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Effects of two kinds of variable-rate nitrogen application strategies on the production of winter wheat (Triticum aestivum)

文献类型： 外文期刊

作者： Zhao, Chunjiang 1 ; Chen, Pengfei 1 ; Huang, Wenjiang 1 ; Wang, Jihua 1 ; Wang, Zhijie 3 ; Jiang, Aning 4 ;

作者机构： 1.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

3.Agr & Agri Food Canada, Hort Res & Dev Ctr, St Jean, PQ J3B 3E6, Canada

4.Inner Mongolia Agr Univ, Coll Agr, Hohhot 010019, Peoples R China

关键词： precision agriculture; variable-rate nitrogen application; winter wheat; SPAD reading; optimised soil adjusted vegetation index

期刊名称：NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE （ 影响因子：1.154； 五年影响因子：1.424 ）

ISSN： 0114-0671

年卷期： 2009 年 37 卷 2 期

页码：

收录情况： SCI

摘要： To improve nitrogen-use efficiency (NUE) is crucial to agriculture; it benefits agricultural production and reduces the impact on the environment. In past decades, a lot of variable-rate nitrogen (VRN) application strategies have been proposed to improve NUE. The concern of this study is whether the specific N management strategy based on using in-season predicted grain yield (ISPGY) and in-season N uptake (ISNU) is more efficient than the VRN strategy based on grain yield goal (GYG) and ISNU. For this purpose, 2-year (2005-06 and 2006-07) winter wheat (Triticum aestivum) experiments with the cultivar 'Jingdong8' were conducted at the China National Experimental Station for Precision Agriculture, located in the Changping district of Beijing, China. Four VRN application methods, SPAD chlorophyll meter method 1 (SCM1), SPAD chlorophyll meter method 2 (SCM2), vegetation index method 1 (VI1), and vegetation index method 2 (VI2), were compared with a random block design with 10 replications. The differences between SCM1 and SCM2 and between VI1 and VI2 were used to estimate the potential grain yield for each plot. SCM1 and VI1 used ISPGY, whereas SCM2 and VI2 adopted GYG. Economic benefits and soil residual NO(3)-N were analysed for the four methods. The results showed that the SCM2 and VI2 performed better than the corresponding SCM1 and VI1, indicating that the GYG-based VRN strategy is better than the ISPGY-based VRN strategy for conducting specific N management.

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