不同施氮水平对小麦/玉米间作产量和水分效应的影响

摘要/Abstract

摘要： 【研究目的】探讨小麦/玉米间作体系中氮肥对水分资源高效利用的调节作用，达到合理施肥提高水分利用效率的目的；【方法】采用田间试验，监测小麦/玉米间作不同生育期土攘水分，研究不同施氮量对产量和水分利用效率的影响；【结果】小麦/玉米间作的土地当量比（LER）为1.31~1.53，小麦相对于玉米的水分竞争比率（CRwm）约为1；在小麦收获时，间作小麦的水分利用效率（39.0 ~46.7kg/mm.hm2）远远高于玉米（1.28~4.81 kg/mm.hm2），也高于单种小麦（25.43 ~30.75 kg/mm.hm2）；在小麦收获后，间作玉米（除N0处理）的水分利用效率迅速提高，当玉米收获时水分利用效率高达32.49 ~47.46 kg/mm.hm2，明显高于单种玉米（27.30 ~38.77 kg/mm.hm2）；【结论】小麦/玉米间作具有明显的产量优势，小麦玉米两作物水分利用效率分布时间上的错位是小麦/玉米间作高效利用水分资源的基础，合理施用氮肥能促进间作种植产量优势和水分利用优势的发挥。

关键词: 河北农业大学, 河北农业大学, 科技园, 运行机制, 管理模式

Abstract: 【OBJECTIVE】The paper mainly illuminated the modulation effect of nitrogen fertilizer on water resource in wheat/maize intercropping system【METHOD】Influence of different nitrogen fertilizer application on water effect in wheat/maize intercropping system was studied;【RESULTS】Intercropping of wheat/maize LER was 1.31~1.53, Wheat CRmm comparing to maize（CRwm）above 1，When wheat was harvested, water use efficiency of intercropping wheat and maize was 39.0~46.7kg/mm.hm2 and 1.28~4.81 kg/mm.hm2 , respectively. Water use efficiency of intercropping wheat was higher than intercropping maize and monocropping wheat (25.43~30.75 kg/mm.hm2). After wheat was harvested, water use efficiency of intercropping maize (except N0 treatment) was increased quickly and it was 32.49-47.46 kg/mm.hm2 when maize was harvested, obviously higher than monocropping maize (27.30~38.77 kg/mm.hm2)【CONCLUSION】The results showed that wheat/maize intercropping system had obvious intercropping yield advantage; it was found that different distribution of water use efficiency of wheat and maize was the base of high water use efficiency in wheat/maize intercropping system, reasonable nitrogen application can facilitate advantage of yield and water use efficiency.

中图分类号:

孙建好,,李隆,张福锁,马忠明. 不同施氮水平对小麦/玉米间作产量和水分效应的影响[J]. 中国农学通报, 2007, 23(7): 345-345.

Sun Jianhao,, Li Long, Zhang Fusuo, Ma Zhongming. Influence of Nitrogen Application on Yield and Water Effect in Wheat/Maize Intercropping System[J]. Chinese Agricultural Science Bulletin, 2007, 23(7): 345-345.

参考文献

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