种植密度对3个棉花品种生长发育和产量品质的影响

Planting Densities: Effects on Growth, Yield and Quality of 3 Cotton Varieties

旨在确定冀中南地区3个主栽品种适宜种植密度,笔者设置3个种植密度(45000株/hm2、75000株/hm2、105000株/hm2),研究不同密度对3个棉花品种生长发育与产量品质的影响。结果表明,随种植密度的增加,棉花茎粗、果枝台数、单株结铃数、蕾铃脱落数、烂铃数降低;单位面积总成铃数随种植密度增加呈增加趋势。‘冀棉958’的籽棉产量在密度75000株/hm2时最大,‘石抗126’与‘冀863’种植密度为75000株/hm2与105000株/hm2时产量大于45000株/hm2密度下的产量,2个较高密度下的籽棉产量差异不显著。‘冀棉958’的适宜种植密度为75000株/hm2,‘石抗126’与‘冀863’的适宜种植密度为75000-105000株/hm2。

The paper aims to determine the suitable planting density of 3 main varieties in south-central Hebei.The authors set up 3 planting densities(45000 plants/hm2,75000 plants/hm2 and 105000 plants/hm2)to study their effects on growth,yield and quality of the 3 cotton varieties.The results showed that:with the increase of planting density,the thick stems,branch numbers,boll numbers per plant,boll shedding numbers and rotten boll numbers decreased;the numbers of boll per unit area increased with the planting density;the seed cotton yield of‘Jimian 958’was the maximum under the density of 75000 plants/hm2,and the yield of‘Shikang 126’and‘Ji 863’under the planting densities of 75000 plants/hm2 and 105000 plants/hm2 were greater than the yield under the density of 45000 plants/hm2,and the differences of seed cotton yield under the 2 relatively high densities were not significant.Therefore,the suitable planting density of‘Jimian 958’is 75000 plants/hm2,and that of‘Shikang 126’and‘Ji 863’is from 75000 plants/hm2 to 105000 plants/hm2.