摘要
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。
The abscission rate of fruits （squares and bolls） of six- breed of cotton （Gossypium barbadense L. ） in South Xinjiang was studied. The results showed that the total rate of abscission was more than 50 %, the boll shedding rate was higher than that of square, the abscission rate of Xinhai 14 was the highest and reached more than 65 %. The highest peaks of abscission probably occurred at the last ten - day period of July, and the abscission rate was consistent with the changing law of the highest temperature. The abscission rate of the different breeds of cotton （Gossypium barbadense L. ） was in a similar trend among the fruit branches, that of the top was higher than the middle and the bottom, especially of Xinhai 16 was higher by 35%. Except Xinhai 3 and Xinhai 16, the boll number of the middle was more than that of the top and the bottom, the rest of the four breeds all showed that the boll number of bottom was more than that of the middle and the top. From the point of view of the yield, the breed of high abscission rate was in low yield, contrarily that of low abscission rate had a higher yield finally. In eonelusion, the yield of all the breeds was in the order of Xinhai 7 〉 Xinhai 20 〉 Xinhai 3 〉 Xinhai 21〉Xinhai 16〉Xinhai 14.
出处
《新疆农业科学》
CAS
CSCD
2007年第2期115-121,共7页
Xinjiang Agricultural Sciences
基金
国家自然科学基金(30360049)
农业部948重大国际合作项目(2003-Z53)
关键词
长绒棉
品种
蕾铃脱落
产量
cotton （Gossypium barbadense L. ）
variety
fruit of square and boll abscission rate
Seed cotton yield
