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对南疆6个长绒棉品种新海7号、新海3号、新海14号、新海16号、新海20号和新海21号的蕾铃脱落规律的系统调查研究表明:长绒棉蕾铃脱落率高于50%,落铃率高于落蕾率,品种之间差异明显,新海14号脱落率最高,达到65%以上。蕾铃脱落的峰期出现在7月下旬,而且蕾铃脱落率的变化趋势与7月中下旬最高气温的变化规律基本一致。6个品种不同果枝之间的脱落率变化规律相似,上部果枝蕾铃脱落率高于中下部果枝,主要是因为上部果枝的落蕾率显著的高于中下部果枝,新海16号甚至高出了35个百分点。除了新海3号和新海16号中部结铃数高于两端以外,其余4个品种结铃数皆是下部>中部>上部,即通常指的“中空”现象。从产量上看,蕾铃脱落率高的品种其最终产量偏低,相反蕾铃脱落率低的品种,最终其产量也高,总体来讲新海7号>新海20号>新海3号>新海21号>新海16号>新海14号。
Systematic investigation on the law of shedding of the buds of 6 bulky cotton varieties Xinhai 7, Xinhai 3, Xinhai 14, Xinhai 16, Xinhai 20 and Xinhai 21 in southern Xinjiang showed that: Above 50%, the rate of falling ring was higher than that of falling rate, and the difference among varieties was obvious. The rate of shedding of Xinhai 14 was the highest, reaching over 65%. The peak of falling buds occurred in late July, and the changing trend of buds’ shedding rate was basically consistent with that of the highest temperature in the middle and late July. The rate of shedding of different fruiting branches in 6 varieties was similar, and the falling rate of the bolls of the upper fruiting branches was higher than that of the middle and lower fruiting branches, mainly because the falling rate of the upper fruiting branches was significantly higher than that of the middle and lower fruiting branches, 35 percentage points. Except for Xinhai 3 and Xinhai 16, the numbers of bolls in the middle of the four varieties were all lower> middle> upper, which is usually referred to as “hollow” phenomenon. From the yield point of view, the high yield of varieties of buds the final yield is low, on the contrary the low rate of falling buds varieties, the final production is also high, on the whole Xinhai 7> Xinhai 20> Xinhai 3> Xinhai 21 No.> Xinhai 16> Xinhai 14.