燕麦间作箭筈豌豆效应对后作产量的影响

2006-2007年,对燕麦(Avena sativa L.)与箭筈豌豆(Vicia sativa L.)不同间作比例下的产量和氮素营养特点进行研究。结果表明:间作对燕麦产量的影响极显著(P<0.01),对箭筈豌豆产草量影响较小:燕麦与箭筈豌豆按3:1间作土地当量比大于1,具有明显产量优势(P<0.05),2006和2007年间作燕麦产量分别比单作提高12.2%和16.8%;燕麦植株的含量氮提高了1.6%~6.8%;间作后茬复种燕麦产量极显著高于连作(P<0.01),其产量是连作燕麦的1.1~1.5倍,但处理间差异不显著。说明燕麦与箭筈豌豆间作,可改善土壤肥力,为后茬作物生产提供养分基础。

Effect of Oat Intercropped with Common Vetch on Aftercrop Yield

The results of 2 years(2006-2007) field experiment indicate that intercropping had significant effect on the forage yield of oat(P<0.01) but less on forage yield of common vetch.The best planting pattern was intercropping of oat and common vetch at 3:1 by which the land utilization ratio(LER) >1 and forage yield of the oat increased by 12.2% in 2006 and 16.8% in 2007 in comparison with oat monoculture.N concentrations in oat forage under intercropping were increased by 1.6% to 6.8% and intercropping of oat and common vetch at 1:3 resulted in significantly higher N concentration than oat monoculture(P<0.05).The forage yield of aftercrop oat in intercropping of oat and common vetch at 1:3 was significantly higher(P<0.01) than oat monoculture.Aftercrop oat forage yields of other planting patterns were 1.1 to 1.5 times those in oat monoculture and not significantly different among them.Oat and common vetch intercropping could improve soil fertility and provide nutrient basis to aftercrop.