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以冀863为供试材料,研究了5个不同密度水平(3.0、5.0、7.0、9.0与11.0万株/hm~2)对棉花生长结铃及产量、品质的影响,结果表明:随着种植密度的增大,棉花株高呈先上升然后略降之后再升的趋势,单株果枝台数与总果节数呈降低趋势;单株外围铃、下部铃、上部铃的成铃数呈下降趋势,而单位面积的成铃数则均为先升后降趋势,单位面积的总成铃数以9.0万株/hm~2处理最高,各部位的成铃率则以7.0万株/hm~2处理最高。不同处理之间的单位面积子棉产量、单位面积植株干物重和总生物量差异显著,处理9.0万株/hm~2的单位面积子棉产量最高,7.0万株/hm~2处理次之;不同处理之间的棉花纤维品质上半部平均长度、整齐度指数、断裂比强度、马克隆值和伸长率差异均不显著。冀863适宜的种植密度为7.0~9.0万株/hm~2。
The effects of five different density levels (3.0, 5.0, 7.0, 9.0 and 110,000 plants / hm ~ 2) on the boll number, yield and quality of cotton were studied with Hebei 863 as test material. The results showed that with the planting The plant height of cotton increased first and then decreased slightly and then increased. The number of fruiting branches per plant and the total number of segments decreased. The number of bolls of single ring, lower ring and upper ring decreased while The number of bolls per unit area first increased and then decreased. The bolls per unit area were the highest at 90,000 plants / hm ~ 2 and the highest bolls at 70,000 plants / hm ~ 2 . The cotton yield per unit area and dry weight per plant and total biomass per unit area were significantly different among different treatments. The highest cotton yield per unit area of 90 000 plants / hm ~ 2 was the highest, followed by 70 000 plants / hm ~ 2. The average fiber length, uniformity index, breaking strength, micronaire and elongation of cotton fiber between different treatments were not significantly different. The suitable planting density of Ji 863 was 7.0 ~ 90 000 plants / hm ~ 2.