不同氮水平下夏玉米夏大豆间作对其农艺性状及产量的影响

Effect of Intercropping on Yield and Agronomic Traits of Summer Maize and Summer Soybean under Different Nitrogen Levels

试验采用裂区设计,主区为4个施氮水平(N0、N1、N2、N3),副区为4个种植模式,分别为:玉米单作(行距60 cm,株距分别为20 cm和30 cm)、大豆单作、玉米大豆间作(行比2∶2),以此研究氮肥和种植模式对玉米、大豆农艺性状及产量的影响。结果表明:在该种植体系下,仅就作物所占净面积而言,玉米为优势作物,间作比单作增产显著;大豆为劣势作物,间作模式下减产显著。对整个种植体系来说,土地当量比>1,说明玉米大豆间作是一种对提高整体产量和经济效益有益的种植模式。

The effect of nitrogen fertilizer and planting mode on yield and agronomic characters of maize and soybean was studied by using split plot design.Four nitrogen levels(N0,N1,N2,N3)were set as main plot,and four planting modes were treated as subplot,which were maize single cropping with the line spacing of 60 cm and the plant spacing of 20 cm and 30 cm respectively,soybean single cropping,summer maize and summer soybean intercropping with the line ratio as 2∶2.The results showed that under the planting system,maize was the dominant crop only concerning the net area of crop,and the yield of intercropping increased significantly than that of single cropping.Soybean was the inferior crop,and the reduction of yield under intercropping pattern was significant.For the whole planting system,the land equivalent ratio was more than 1,indicating that intercropping of maize and soybean was beneficial to increasing the overall yield and economic benefits.