鲁西南麦套杂交棉适宜种植密度研究

Optimum Plant Density of Hybrid Cotton Intercropped with Wheat in Southwest of Shandong Province

种植密度是棉花群体形成的基础,对棉花产量和纤维品质皆有重要影响。为探明鲁西南麦棉套作条件下杂交棉的适宜种植密度,于2009年在山东省嘉祥县设计3.0、4.0、5.0、6.0、7.0株/m2 5个密度处理,研究了种植密度对套作棉花果枝数、果节数、产量、产量构成因素以及经济系数的影响。结果表明,种植密度对棉花单株果枝数、果节数以及产量构成因素皆有显著影响,密度在4.0株/m2时棉花产量构成因素比较协调,经济系数合理,籽棉产量和皮棉产量较高,可作为麦套杂交棉的适宜种植密度。

Plant density is the base to establish a proper population of cotton, which affects the final cotton yield and fiber quality. The objective of this study was to determine the proper plant density for hybrid cotton in a wheat - cotton intercropping system in southwest of Shandong. A field experiment with 5 plant density treatments （3.0, 4.0, 5.0, 6.0 and 7.0 plants/m2 ） was conducted in Jiaxiang county to study the effects of plant density on the number of fruiting branches, the number of fruiting nodes, yield, yield components and harvest index in 2009. The results showed significant effects of plant density on the number of fruiting branches, the number of fruiting nodes, yield components. In conclusion, 4.0 plants/m2 was the suitable plant density for hybrid cotton intercropping with wheat to obtain higher cotton yield and proper coordination of yield components.