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1低产桑园改造全省现有桑园10.96万hm2,其中低产桑园面积达到3.71万hm2,占33.8%。造成桑园低产有以下原因:1立地条件差(坡地或山地),土壤瘠薄或土壤酸碱度过高;2栽植密度过稀;3桑园肥水管理差;4桑树剪伐不合理,树形不规范或树势衰退;5桑叶收获不合理,只采叶不养树;6树龄过老;7品种不良;8病虫危害严重。要改造低产桑园,先调查低产原因,针对性地采取措施,达到增产。低产桑园改造措施如下:
1 low-yield mulberry transformation of the province’s existing mulberry 109600 hm2, of which low yield mulberry reached 37100 hm2, accounting for 33.8%. Mulberry low yield caused by the following reasons: 1 poor site conditions (slope or mountain), infertile soil or soil pH is too high; 2 planting density is too thin; 3 Mulberry fertilizer and water management is poor; 4 mulberry cut unreasonable tree irregularities Or tree recession; 5 mulberry leaves unreasonable harvest, only the leaves do not raise trees; 6 age over old; 7 bad varieties; 8 pests and serious harm. To transform low-yield mulberry, low-yield first survey the reasons for targeted measures to achieve increased production. Low-yield mulberry transformation measures are as follows: