摘要
以新陆早33号为供试材料,设置6个种植密度梯度(9.0万～31.5万株/hm2),分析密度对早熟陆地棉主要性状的影响,并探讨最佳种植密度。结果表明,密度与株高、叶片数、蕾数显著拟合于直线模型;与果枝数、铃数、吐絮期总干质量极显著拟合于对数曲线模型;与始节高极显著拟合于幂指数曲线模型。密度与开花初期总干质量极显著拟合于S型曲线模型;与花铃期总干质量极显著拟合于三次曲线模型;与铃期总干质量极显著拟合于逆曲线模型。密度与铃质量、下部铃质量极显著拟合于二次曲线模型;与下部铃衣分显著拟合于S曲线模型;与籽棉、皮棉产量显著拟合于二次曲线模型。综合铃质量、衣分、产量等性状,北疆种植早熟陆地棉的最佳密度是22.5万株/hm2。
The effect of planting density on the main characters of early-maturing upland cotton and the optimum planting density were analyzed with Xinluzao 33 at 6 planting densities form 27.0 million to 31.5 million plants per hectares.Under 6 planting densities,the variation of plant height,leaf number and bud number were significantly fit to linear model.The variation of fruit branch number,boll number and open bolls stage total dry weight were extremely significantly fitting to logarithmic curves model.The variation of first fruit branch height was extremely significantly fitting to power index curves model.Under 6 planting densities,the variation of flowering stage total dry weight was extremely significant fitting to S curves model,flowering-boll stage total dry weight was extremely significantly fit to cubic curves model,boll stage total dry weight was extremely significant fitting to inverse curves model.Under the 6 planting densities,the variation of boll weight and bottom boll weight were extremely significantly fitting to quadratic curves model,lint percentage of bottom boll was significantly fitting to S curves model,yield and lint yield were significantly fitting to quadratic curves model.In an overview of boll weight,lint percentage and yield characters,22.5 million plants per hectares is the optimum planting density of early-maturing upland cotton in northern of Xinjiang.
出处
《山西农业科学》
2011年第7期659-663,共5页
Journal of Shanxi Agricultural Sciences
基金
国家公益性行业(农业)科研专项(nyhyzx07-005)
关键词
早熟陆地棉
种植密度
主要性状
回归方程
early-maturing upland cotton
planting density
main characters
regression equation
