棉花不同配置方式群体光能分布规律的探讨

• 作 者: 毛树春 薛中立 张西岭 杨汝献
• 机 构: 中国农业科学院棉花研究所,中国农业科学院棉花研究所,中国农业科学院棉花研究所,中国农业科学院棉花研究所 河南安阳 455112,河南安阳 455112,河南安阳 455112,河南安阳 455112
• 出 处: 棉花学报
• 发表日期: 1993年01期
• 关键词: 行距配置 光能利用 封行期 光能分布 配置方式 光强 分布规律 密度试验 小麦播种 黄淮地区

试验在黄淮地区棉麦两熟不同配置方式的棉田进行。测定表明,7月底封行期叶面积系数(F 或 LAI)为2.16～4.40,日光强和层次光强不同配置方式之间存在较大差异。中低产与高产田的六二和三一式(常规密度)群体消光系数(K)值大且不稳定,宽行过宽群体光浪费严重;四二式和高密度的群体 K 值小且稳定,光能分布合理。研究指出,两熟配置宜适当缩短行距以增加群体密度。7月底封行期最适 F 为3.5～4.0,实现这一指标,育苗移栽宜选用四二式配置方式,标准带幅宽150cm;采用密植密管促早栽培,每公顷密度75000株较为合适。

The experiment was conducted in cotton fields with different configurations of cotton and wheat in Huanghuai area. The results showed that the leaf area index (F or LAI) at the end of July was 2.16 ~ 4.40, and there was a big difference between the daytime intensity and the layer intensity. The extinction coefficient (K) values ​​of large and low yielding and high yielding fields were large and unstable, and the width and width of the broad and wide rows were seriously wasted. The population K values ​​of four-and-one type and high density were small and stable , Light energy distribution is reasonable. The study pointed out that the two cooked configuration should be appropriate to shorten the row spacing to increase population density. At the end of July, the optimum F was 3.5-4.0. To achieve this target, transplanting of seedlings should adopt four or two types of configuration with standard width of 150cm. It is more appropriate to adopt early planting of dense planting tube with a density of 75000 plants per hectare .