干旱区生态环境知识资源中心(Arid): High Maize Density Alleviates the Inhibitory Effect of Soil Nitrogen on Intercropped Pea

Arid

DOI	10.3390/agronomy10020248
	High Maize Density Alleviates the Inhibitory Effect of Soil Nitrogen on Intercropped Pea
	Zhao, Cai 1,2; Fan, Zhilong 1,2; Coulter, Jeffrey A.3; Yin, Wen 1,2; Hu, Falong 1,2; Yu, Aizhong 1,2; Fan, Hong 1,2; Chai, Qiang1,2
通讯作者	Chai, Qiang
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2020
卷号	10 期号:2
英文摘要	Nitrogen (N) fixation is essential in the development of sustainable agriculture, but nodulation of legumes is usually inhibited by N fertilization. In this study, we evaluated the increased density of intercropped maize (Zea mays L.) as a means to alleviate the inhibitory effect of soil mineral N on intercropped pea (Pisum sativum L.) and improve system performance. A field experiment was conducted in the Hexi Corridor region of northwestern China from 2012 to 2014. The experiment consisted of monoculture pea, monoculture maize, and a pea/maize strip-intercropping system. Two levels of N fertilization were evaluated in both cropping systems during the co-growth period of intercropping, i.e., 0 kg N ha(-1) (N0) and 135 kg N ha(-1) (N1), and three maize densities were evaluated with both levels of N fertilization in the intercropping system, i.e., 45,000 plants ha(-1) (D1), 52,500 plants ha(-1) (D2), and 60,000 plants ha(-1) (D3). The application of N reduced the number of nodules of intercropped pea by 135% at D1 and by 9% at D2 compared to no application of N, in all the years examined. The alleviation of the inhibitory effect of soil mineral N on the nodulation of intercropped pea (C-is) was calculated as the percentage increase in nodulation with intercropping relative to monoculture for a given level of N fertilization. With the application of N, C-is was improved by increased intercropped maize density (D3 > D2 > D1) at all stages. The internal efficiency of nitrogen (IEN) of pea was improved with intercropping and, on average, was 19% and 12% greater at D3 than at D1 and D2, respectively. These results demonstrate that increased maize density can alleviate the inhibitory effect of soil N on the nodulation of pea and sustain the productivity of maize/pea intercropping while reducing N fertilizer requirements in arid regions.
英文关键词	maize/pea intercropping plant density nitrogen use efficiency root nodules
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000521366400020
WOS关键词	CROP PRODUCTIVITY ; N-2 FIXATION ; INTERSPECIFIC COMPETITION ; YIELD ADVANTAGE ; RESOURCE USE ; MINERAL N ; SYSTEMS ; WHEAT ; RICE
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313990
作者单位	1.Gansu Agr Univ, Gansu Prov Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China; 2.Gansu Agr Univ, Coll Agron, Lanzhou 730070, Peoples R China; 3.Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108 USA
推荐引用方式 GB/T 7714	Zhao, Cai,Fan, Zhilong,Coulter, Jeffrey A.,et al. High Maize Density Alleviates the Inhibitory Effect of Soil Nitrogen on Intercropped Pea[J],2020,10(2).
APA	Zhao, Cai.,Fan, Zhilong.,Coulter, Jeffrey A..,Yin, Wen.,Hu, Falong.,...&Chai, Qiang.(2020).High Maize Density Alleviates the Inhibitory Effect of Soil Nitrogen on Intercropped Pea.AGRONOMY-BASEL,10(2).
MLA	Zhao, Cai,et al."High Maize Density Alleviates the Inhibitory Effect of Soil Nitrogen on Intercropped Pea".AGRONOMY-BASEL 10.2(2020).