春季采叶程度对春伐桑树主要经济性状及产叶量的影响

Effect of Different Degree for Leaf Collecting in Spring on Main Economic Characters and Leaf Yield of Spring Cutting Mulberry

对春伐桑春季 (春蚕 5龄期 )不同采叶程度的作用效果进行了比较试验。结果表明 :夏季新梢的伸长生长量随采叶程度的提高而增加 ,围粗生长量减小 ,采叶 1/ 2和不采叶的处理叶质差、产量低 ;秋季新梢的伸长生长量采叶 1/ 2的处理急剧减少 ;采叶 1/ 3和 1/ 4的处理 ,各季新梢伸长生长量高 ,枝条健壮 ,经济性状良好 ,叶质优 ,全年单株产量分别达到 2 .52 kg和 2 .2 6 kg的较高水平。

The results showed as follow. The lengthening increment of the new shoot of spring cutting mulberry in Summer is increasing and yield and diameter increment decreasing accompanied with raising the amount of leaf collecting. The leaf quality and yield for 1/2 leaf collecting and non collection is decreased. The lengthening increment of new shoot in Autumn is sharply reduced for 1/2 leaf collecting. The treatments for 1/3 and 1/4 leaf collecting the lengthening increments of new shoot in Spring and Autumn is higher with stronger branches better economic properties and leaf quality, and its yield reaches a higher level to 2.52 kg/plant and 2.26 kg/plant respectively within one year.