【摘要】 棉花伏前桃、伏桃、秋桃的调查和大数统计三元多项式回归分析证明 :伏前桃多 ,增加秋桃有利于增产 ,秋桃无论多少 ,不宜以增加伏前桃来增产 ,应发挥伏桃增产优势 ,而伏前桃增加 ,则可同时增加秋桃来提高产量。秋桃多时 ,无论伏桃多或少 ,产量同伏前桃数量呈正比 ,此时 ,伏桃以保持中等数量 (3.5～ 3.7个 )最佳。更多还原

【Abstract】 The investigation of cotton bolls at three periods (before hot days,hot days and autumn) and the statistical results indicate that when bolls before hot days are plenty, to increase the number of autumn bolls is benifitial to good yielding.No matter how many the autumn bolls are ,it’s no good for yielding to increase the number of bolls before hot days, but to take the advantage of hot days bolls, when autumn bolls are plenty,no matter how many the hot days bolls are, the yield is in direct propotion to the number of bolls before hot days. In this case, it’s important to keep the hot days bolls at a midium number(3.5～3.7×plant -1 ).更多还原