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近年来,随着“农业学大寨”群众运动的蓬勃发展,华北平原地区,耕作制度发生了深刻变化,小麦,玉米间作套种面积迅速扩大。我们在1974、1975两年中着重研究了在中等肥水条件下,不同田间结构套作玉米的生育特点、产量形成以及与田间小气候条件的关系。试验地套作玉米的畦埂,按埂宽分一尺窄埂与2尺宽埂二组,在一尺埂宽类型中又按不同畦宽分2.2尺,3.4尺,4.6尺畦宽三种,埂上套种一行玉米;在2尺埂宽类型中分5.0尺,6.2尺,7.4尺,8.6尺,9.8尺畦宽五种,埂上套种两行玉米,各种畦宽均按2500株/亩密度套种玉米。1974年试验地为冬麦套种玉米,1975年为春麦套种玉米。具体试验小区配置见表1。
In recent years, with the vigorous development of mass movement in “learning from agriculture in Dazhai”, the cultivation system has undergone profound changes in the plains of North China. The intercropping area for wheat and maize has rapidly expanded. In the two years of 1974 and 1975, we focused on the fertility characteristics, yield formation and the relationship with the field microclimate conditions under medium fertilizer and water conditions. Experimentally set corn 畦 埂, according to 埂 wide and a foot narrow 埂 2 2 feet wide 埂 two groups in a foot 埂 wide type, according to different 畦 width of 2.2 feet, 3.4 feet, 4.6 feet 畦 wide three , With a row of maize on one row of corn; 5 feet, 6.2 feet, 7.4 feet, 8.6 feet and 9.8 feet wide and 5 rows of maize in 2 feet wide and wide type, Mu interplanting corn density. Tested in 1974 for the winter wheat intercropped corn, 1975 intercropping corn spring maize. Specific test cell configuration shown in Table 1.