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对播期与密度补偿试验进行分析 ,结果表明 :播期与密度有一定的补偿调节关系 ,找出了直播地膜棉在淮北地区适播期为 4月 1 5～ 2 5日 ,在适播期内迟播产量提高 ,同时还发现 ,棉花有效果枝总量的发生相对稳定 ,以一定的有效果枝数为群体起点控制参数 ,对指导大田生产有积极的意义
The results of sowing date and density compensation test showed that the sowing dates and densities had a certain compensatory adjustment relationship, and the suitable sowing date of live mulching cotton in Huaibei area was from April 15 to April 25, In the meantime, we found that the total number of effective fruiting branches in cotton was relatively stable, and the effective parameter was the effective starting point to control the starting parameters of the population, which had a positive meaning for guiding the production in the field