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山西省是我国北方的一个古老蚕区,群众栽桑养蚕的经验十分丰富。晋东南地区沁水、阳城一带,采用砍条出扦的桑树修剪技术,就是在长期的生产实践中创造出来的,适合北方地区自然条件和桑树生长的一种成功经验.比夏伐具有很多优越性,应积极推广.一、出扦时间早春季节,桑树液开始流通,桑芽尚未萌发前为出扦适期。晋东南的南部约在3月中旬.北、中部一般在3月底至4月初.过早出扦留下一段扦条基部,往往易遭受冻害而干枯;过迟会引起树液流失过多,影响冬芽萌发和生长,而且操作时也会碰伤已脱苞的芽子,对桑树生长发育不利.二、出扦技术桑树达到一定高度后,于每年春季发芽前,将全株的1/3或2/5的枝条,离条基
Shanxi Province is an ancient silkworm area in the north of our country. The masses have very rich experience in planting mulberry silkworms. The mulberry pruning technique using chopped sticks and cuttings in Qinshui and Yangcheng areas in southeastern Shanxi is a successful experience that has been created in long-term production practices and suitable for natural conditions and mulberry growth in northern China. Superiority, should be actively promoted.One, a skewer time Early spring, the mulberry liquid began to circulate, mulberry buds have not yet germinated before the cuttings suitable period. The southern part of southeastern Shanxi Province is about mid-March, and the northern and central parts are generally from the end of March to the beginning of April. Premature sticking out of the base of a section of cuttings often tends to suffer from frost damage and dryness. Too late will cause excessive loss of tree sap and affect winter buds Germination and growth, and the operation will also bruised buds have been decapitated, the growth and development of mulberry adversely. Second, the stem technology Mulberry reach a certain height, the annual spring before germination, the whole plant 1/3 or 2 / 5 branches, from the base