为了培肥地力,并提高光能利用效率,我们在河北邯郸农业高等专科学校农场进行了棉田间作油菜试验,以平播棉花作对照。 一、试验条件与设计 试验地为轻沙壤质岗坡地,中等肥力。田间设计为顺序排列,重复二次,小区面积0.25亩,棉花品种为中棉12号。4月16日播种,大小行种植,大行距2.5尺,小行距1.5尺,密度为每亩4000株。在 In order to cultivate fertility, and improve the efficiency of light energy use, we conducted a rapeseed experiment in the cotton field at the Farm of Handan Agricultural College in Hebei Province, using cotton as a control. First, the test conditions and design test for light sand loess hills, medium fertility. Field design for the order of arrangement, repeated twice, the plot area of ​​0.25 acres, cotton varieties in cotton 12. April 16 sowing, planting large and small lines, large line spacing 2.5 feet, 1.5-foot line spacing, density of 4000 lines per acre. in