不同种植密度对郑杂棉4号产量及品质的影响

目的]研究种植密度对郑杂棉4号产量及品质的影响.方法]试验设6个种植密度处理,分别为2.25万、2.70万、3.15万、3.60万、4.05万、4.50万株/hm2.结果]在种植密度＜3.60万株/hm2时,佚前桃、伏桃、总桃数、子棉产量均随种植密度增大而增加,而马克隆值随种植密度的增大而减小,绒长和比强度变化不大.结论]从充分发挥个体优势和群体优势及提高纤维品质考虑,在中上等水肥地,种植密度为3.60万株/hm2时郑杂棉4号可达到高产优质的目的,该研究可为挖掘郑杂棉4号的增产潜力和大面积生产提供理论依据.

Effects of Different Planting Density on Yield and Quality of Zhengzamian No.4

Objective ] The aim was to study the effects of different planting density on yield and quality of Zhengzamian No. 4. Method ] Six planting density were 2.25 × 104, 2.70 ×104, 3. 15 ×104, 3.60 ×104, 4.05 ×104, 4.50 ×104 plants per ha. Result] When the planting density was less than 3.60 × 104 plants per ha, with planting density rising, the number of cotton bolls at different bloomed stages and seed cotton yield increased, while micronaire decreased, the length of fiber and specific strength has a little change. Conclusion ] Considering from giving full play to the individual and group advantages and improving fiber quality, in field of middle and upper water and fertilizer, Zhengzamian No. 4 reaches the goal of high yield and good quality when the planting density is less than 3.60 × 104 plants per ha, the study provides a theoretical basis for grubbing the yield - increasing potentiality of Zhengzamian No. 4 and its production in a large scale.