果桑叶面积指数与产量的关系

Relationship between Leaf Area index and Yield of Morus alba

以种植于蒙自草坝农场果桑园的果桑大10品种为对象,对果桑的叶面积与叶长、叶宽的相关性、叶面积生长动态、叶面积指数与产量的关系进行了研究,结果表明:果桑叶面积与叶长、叶宽的相关回归方程分别为Y(叶长)=-100.799 2+16.7483X(R = 0.978 0)和Y(叶宽)=-75.983 1+18.118 6X(R = 0.971 5);果桑叶面积的生长动态在夏伐前后其叶面积指数由0逐渐增长8.30和5.28,至落叶又为0,叶面积生长呈上升趋势,最快的时期是2～4月.果桑采果时的最佳叶面积指数为6～9.

Study on relationship between leaf area and length, yield, growth dynamic of leaf area of “big 10” varieties of Morus alba at Caoba Farm of Mengzi, Yunnan prevince resulted that the regression equations of leaf area and length and width were Y （ leaf length ） = - 100.799 2 ＋ 16.748 3X （ R = 0.978 0 ）, and Y （ leaf width ） = - 75.983 1 ＋ 18.118 6X （ R = 0.971 5 ） . The dynamic leaf area growth increased from 0 before summer cutting to 8.30 and 5.28 after summer cutting, and decreased to 0 after defoliation. The fastest growing period was from February to April, and optimal leaf area index was from 6 to 9 when fruit picking.