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塔里木地区春播桑苗一般四月下旬至五月初播种,生长150—170天,当年就能出圃.但出苗后,正是气温渐高、风沙频繁、空气干燥、蒸发强烈、返盐迅速时节.这时,下雨也多,土壤板结,返盐加剧,桑苗大量死亡.现就这个问题略述我们的意见.一、加强松土松土可改变土壤水、气、热状况,有防止返盐的作用.据调查:播后一月松土,保苗率比不松土提高42.15%,地上部增长1.1厘米,主根增长2.4—5.9厘米,一级侧根多8—10条.松土必须“早、勤、细”,全面进行.幼苗现行时即开始,以后每10—12天松土一次,
The spring sowing in the Tarim area is generally sowing from late April to early May and will last for 150-170 days, but after the emergence of the spring sambal, the temperature will rise, the wind will be frequent, the air will be dry, the evaporation will be strong, and the salty salt will return quickly. When the rain is also more soil compaction, exacerbated by salt, mulberry seedlings died a large number of this issue is now outlined in our opinion .To strengthen the loose soil can change soil water, gas and heat conditions, to prevent salt According to the survey: one month after sowing sowing, seedling raising rate 42.15% higher than non-loose soil, 1.1 cm aboveground growth, the main root growth of 2.4-5.9 cm, a lateral root more than 8-10. Loose soil must be “early , Diligence, fine ”, in full. When the seedling is started, after every 10-12 days of loosening soil,