Depth of nitrogen fertiliser placement affects nitrogen accumulation, translocation and nitrate-nitrogen content in soil of rainfed wheat
文献类型： 外文期刊
作者： Duan, W. 1 ; Shi, Y. 1 ; Zhao, J. 3 ; Zhang, Y. 1 ; Yu, Zh. 1 ;
作者机构： 1.Shandong Agr Univ, Key Lab Crop Ecophysiol & Farming Syst, Minist Agr, Tai An 271018, Shandong, Peoples R China
2.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R China
3.Chinese Acad Agr Sci, Agr Informat Inst, Beijing 100081, Peoples R China
关键词： Nitrogen fertiliser placement;Nitrogen accumulation;Nitrogen translocation;Nitrate-nitrogen content;Grain yield;Rain-fed wheat
期刊名称：INTERNATIONAL JOURNAL OF PLANT PRODUCTION （ 影响因子：2.017； 五年影响因子：1.85 ）
ISSN： 1735-6814
年卷期： 2015 年 9 卷 2 期
页码：
收录情况： SCI
摘要： A field experiment was conducted to examine the effects of different depths of nitrogen (N) fertiliser placements on N accumulation, remobilisation and NO3--N content in soil of rainfed wheat. Nitrogen was applied on the surface (D-1) and in the 10 cm (D-2), 20 cm (D-3) and 30 cm (D-4) soil layers from 2010 to 2012. Compared with D-1 and D-2, D-3 and D-4 treatments obtained significant higher N distribution amounts in grain and N accumulation amounts at maturity. D-3 and D-4 treatments increased the N accumulation amount of vegetative organs at anthesis and at maturity. D-3 treatment resulted in significantly higher N translocation amounts from vegetative organs to grains compared with D-1 and D-2 treatments and had no significant difference with D-4 treatment. Compared with the D-1 and D-2, D-3 and D-4 treatments obtained significant higher NO3--N contents in the 20 cm to 120 cm soil layer at anthesis from 2011 to 2012. However, D3 treatment showed no significant differences with D-1 and D-2 treatments at maturity in terms of the NO3--N contents in the 40 cm to 100 cm soil layer. D-4 treatment produced the highest NO3--N contents in the 40 cm to 140 cm soil layer. Grain yield, N uptake efficiency, apparent N recovery efficiency, N agronomic efficiency and N partial factor productivity were significantly increased by D-3 and D-4 treatments. These results suggest that the D3 treatment facilitates the best wheat production and highest efficiency among all treatments.
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