Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geoderma.2012.06.012 |
Winter wheat grain yield associated with precipitation distribution under long-term nitrogen fertilization in the semiarid Loess Plateau in China | |
Guo, Shengli1,2; Zhu, Hanhua1,2; Dang, Tinghui1,2; Wu, Jinshui3; Liu, Wenzhao1,2; Hao, Mingde1,2; Li, Yong3; Syers, J. Keith4 | |
通讯作者 | Guo, Shengli |
来源期刊 | GEODERMA |
ISSN | 0016-7061 |
出版年 | 2012 |
卷号 | 189页码:442-450 |
英文摘要 | Nitrogen (N) and precipitation are the main limiting factors in food production under rain-fed cropping systems in arid and semiarid regions. A long-term field experiment was conducted from 1984 to 2009 in the Changwu State Key Agro-Ecological Experimental Station of the Loess Plateau, China, to study interactions between precipitation and N fertilization. Winter wheat (Triticum aestivum L) was grown with N fertilization at 0, 45, 90, 135, and 180 kg N ha(-1). With 25-year N fertilization, soil organic carbon and total N were increased by 18% and 26%, respectively. Mean yields and precipitation use efficiency (PUE) levels with N fertilization were increased by onefold to twofold compared with unfertilized soils. Generally, during the period of 1984-2009, grain yields with 45-180 kg N ha(-1) increased at the rate of 38-49 kg ha(-1) year(-1) (p<0.05), whereas PUE increased at the rate of 0.071-0.088 kg mm(-1) year(-1). These increases over time are largely attributable to improvements in soil organic carbon and total N. Variations in yield were proportionally reduced by N fertilization, but heavily depended on the fluctuation of precipitation. Grain yields with 45-180 kg N ha(-1) decreased by approximately 10%-45% (p<0.05) in the dry years (drought index<-035) compared with the normal years, whereas significant increases were not detected in the wet years (drought index>035). Grain yields with 90-180 kg N ha(-1) were positively correlated (p<0.05) with fallow season precipitation, but insignificantly correlated with growing season precipitation. The optimum N fertilization rates in the dry, normal and wet years increased following an increasing sequence of 45, 135 and 180 kg N ha(-1). These results have significant implications for optimizing N fertilization and maximizing yield and PUE in rain-fed cropping systems in arid and semiarid regions. (C) 2012 Elsevier B.V. All rights reserved. |
英文关键词 | Grain yield Precipitation distribution Precipitation use efficiency Soil organic carbon Long-term N fertilization |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; Thailand |
收录类别 | SCI-E |
WOS记录号 | WOS:000311875900051 |
WOS关键词 | WATER-USE EFFICIENCY ; SOIL ORGANIC-MATTER ; FED MEDITERRANEAN CONDITIONS ; RAINFALL-USE EFFICIENCY ; CROPPING SYSTEM ; N FERTILIZATION ; STORAGE EFFICIENCY ; AVAILABLE WATER ; DRYLAND WHEAT ; TILLAGE |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
来源机构 | 西北农林科技大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172522 |
作者单位 | 1.NW Univ Agr & Forestry, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 3.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China; 4.Naresuan Univ, Fac Agr Nat Resources & Environm, Phitsanulok 65000, Thailand |
推荐引用方式 GB/T 7714 | Guo, Shengli,Zhu, Hanhua,Dang, Tinghui,et al. Winter wheat grain yield associated with precipitation distribution under long-term nitrogen fertilization in the semiarid Loess Plateau in China[J]. 西北农林科技大学,2012,189:442-450. |
APA | Guo, Shengli.,Zhu, Hanhua.,Dang, Tinghui.,Wu, Jinshui.,Liu, Wenzhao.,...&Syers, J. Keith.(2012).Winter wheat grain yield associated with precipitation distribution under long-term nitrogen fertilization in the semiarid Loess Plateau in China.GEODERMA,189,442-450. |
MLA | Guo, Shengli,et al."Winter wheat grain yield associated with precipitation distribution under long-term nitrogen fertilization in the semiarid Loess Plateau in China".GEODERMA 189(2012):442-450. |
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