东北地区西部不同燕麦带状间作模式的产量及氮素吸收效应

Yield and Nitrogen Uptake of Various Oat Strip Intercropping Patterns in Western of Northeast China

为给东北地区西部种植模式优化提供可行的带状间作组合,于2014-2015年,在吉林省白城市开展了连续两年的大田试验,研究了燕麦//玉米、燕麦//向日葵及燕麦//绿豆三种带状间作模式的产量及氮素吸收效应。结果表明,三种间作模式均具有显著的产量优势及较高的氮素吸收效率,土地当量比(LER)及氮素吸收当量比(NER)均大于1,燕麦//向日葵带状间作的LER及NER分别为1.23~1.38、1.29~1.44,两年内均为最高。燕麦//向日葵间作中,两种作物的边行产量均显著高于单作及内行,对间作燕麦、向日葵产量的贡献率分别为44.2%~45.1%、69.9%~70.8%,具有显著的边行优势。综合分析认为,燕麦//向日葵带状间作在东北地区西部具备一定的推广应用价值。

In order to provide an optimal strip intercropping pattern for oat growing in western of Northeast China, two-year （2014-- 2015） field trails were conducted in Baicheng of Jilin province. The objective of this study was to compare the yield and nitrogen（N） utilization in the strip intercropping patterns of oat//maize, oat//sunflower, and oat//mung bean. All intercropping patterns had signifi- cant advantages in crop yield and N utilization. The land equivalent ratio（LER） and N equivalent ratio （NER） of all intercropping patterns were higher than 1. Among the three patterns,LER and NER of oat//sunflower were highest,1.23 to 1.38 and 1.29 to 1.44 in 2014 and 2015 ,respectively. The yield of edge row of oat and sunflower were significantly higher than those of inner row and sole cropping, with the contributing rate of 44.2% to 45.1% and 69.9% to 70.8% ,respectively. Overall,oat//sun- flower strip intercropping is the optimal intercropping pattern.