不同种植密度对三个棉花品种生长发育和产量品质的影响

研究旨在确定冀中南地区三个主栽品种适宜种植密度。试验设置3个种植密度：45000株/hm2、75000株/hm2与105000株/hm2,研究不同密度对三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。单位面积总成铃数对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,两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株/hm2～105000株/hm2范围内。

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

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.