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我县夏甘薯栽培面积在9万亩左右,平均亩产鲜薯3,754斤,并出现了亩产5,000斤以上的大队,他们在高产栽培技术方面,主要抓了以下措施。一、抢时早栽。夏甘薯因生育期短,抢时早栽,可增加积温,充分利用高温季节,促进蔓叶生长,扩大光合面积,延长块根膨大期,以提高产量。根据4年23处调查,6月25—30日栽的夏薯,平均亩产鲜薯4,725斤,7月上旬裁的亩产4,163斤,平均每晚栽1天,减产56斤。栽期愈晚,减产愈多。减产的主要原
My county summer sweet potato cultivation area of 90,000 acres, the average yield of 3,754 pounds of fresh mu and emergence of more than 5,000 pounds per mu unit, their high-yielding cultivation techniques, the main catch the following measures. First, early planting when robbed. Summer sweet potato due to short growth period, grab early planting, can increase accumulated temperature, make full use of high temperature season, promote the growth of vine leaves, expand photosynthetic area, extend tuber enlargement, in order to increase yield. According to the survey conducted in 23 countries in 4 years, the sweet potatoes planted on June 25-30 averaged 4,725 catties per mu in fresh land, and 4,163 catties per mu in early July. The average daily yield was 56 days. The later the planted, more yield reduction. The main reason for the reduction