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在甘薯栽培中经常出现前期茎叶生长慢,块根形成晚;中期地上部徒长,块根产量低;后期早衰影响块根膨大等问题而难获高产。针对这些问题,我们自1973年开始至1977年,在本所、农村基点和协作单位共82处(次)进行试验,其中有52处(次)共计116.3亩,亩产达7,078—9,064斤,小面积上突破万斤。实践证明:凡是采取了增强土壤通气性,增施肥料、合理施肥,选用良种、壮苗,合理密植,及时排涝、防旱等项措施的,就能够促进前期早发,控制中期徒长,防止后期早衰,从而获得高产。
In the cultivation of sweet potato, the early growth of stems and leaves is slow, and the root formation is late; the mid-long part of the plant is long and the yield of root is low; the late premature aging affects the problems of tuberous root enlargement and difficult to obtain high yield. In response to these problems, we conducted a total of 82 tests at our institute, rural areas and cooperative units from 1973 to 1977, of which 52 (times) totaled 116.3 mu with yields of 7,078-9,064 kg per mu, Small area break million pounds. Practice has proved that: all to take to enhance soil aeration, fertilization, fertilization, the choice of elite, strong seedlings, close planting density, timely drainage, drought and other measures, we can promote early premature, control medium-term growth and prevent late Premature aging, thus obtaining high yield.