目前,在甘薯生产中普遍存在着植株生长不匀、小株的此例较高的情况。据调查,一般小株率都在10%左右,严重的达20%以上,甚至更多。造成小栋的原因很多,如选苗不严,薯苗嫩弱、栽插技术不佳,再遇到不良的气候条件,如春季气地温低、土壤干旱或遭风害,寒流袭击等,使栽插后的薯苗发根慢,短期内不能恢复生长。有的在夏薯栽插时受烈 At present, in the production of sweet potato ubiquitous plant growth unevenness, small cases of this higher case. According to the survey, the average small plant rate is about 10%, severe up to 20% or more. There are many reasons for causing small houses, such as the ineffective election of seedlings, weak tender seedlings, poor planting techniques, and adverse weather conditions such as low temperature in spring, soil drought or wind damage, cold current attacks, etc. Potato seedling roots after planting slow, can not resume growth in the short term. Some were planted in the summer when the potato was strong