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	Nitrogen and phosphorus uptake and yield of wheat and maize intercropped with poplar
	Li P.
	2008
关键词	maize nutrient uptake poplar semi-arid region wheat yield alley cropping system defining competition vectors southern united-states midwestern usa agroforestry systems dynamics ontario canada growth soil
英文摘要	This study investigated the N and P uptake and yield performances of winter wheat (Triticum aestivum) and maize (Zea mays) upon intercropping with 1- to 2-year-old poplar (Populus x euramericana cl. "74/76'') trees compared to a sole wheat and maize rotation in fertilized and unfertilized subplots. Aboveground biomass, grain yield, yield components, and N and P contents of wheat and maize were measured in each plot, in addition to soil available N and P. No significant differences in biomass, grain yield, and N and P uptake of wheat were found between the intercropping and sole-crop systems within the same fertilization treatment. Maize biomass and grain yield decreased by 37% and 31%, and 28% and 34% for the fertilized and unfertilized treatment at maize maturity in the same order. The N and P contents in maize intercropped with poplar were found to be significantly lower than in the sole-maize. For the fertilized treatment, intercropping with poplar led to significantly lower soil NO(3)-N and Olsen-P in the 0-20-cm layer during the active wheat growth period and a significant increase in soil NO(3)-N and Olsen-P during the active maize growth period due to less N and P uptake by maize. The poplar induced a decrease in soil NO(3)-N and Olsen-P during both wheat and maize season under unfertilized conditions, thereby influencing the yield and nutrient uptake of intercrops. Therefore, enough available nutrients had to be provided for the agroforestry systems, especially during the active growth period of intercrops.
出处	Arid Land Research and Management
卷	22
期	4
页	296-309
收录类别	SCI
语种	英语
ISSN号	1532-4982
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24157]
专题	资源利用与环境修复重点实验室_资源地理与国土资源研究室_SCI/SSCI期刊论文
推荐引用方式 GB/T 7714	Li P.. Nitrogen and phosphorus uptake and yield of wheat and maize intercropped with poplar. 2008.

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