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低温霜冻是造成我县冬种番薯产量不高不稳的主要原因。多年来在栽培上仍未能找出一个较好的防御办法。本试验目的是利用地膜能保温、透光和保湿的作用,探讨地膜覆盖对冬薯的增产效果和相应的栽培技术,为大田推广提供依据。一、试验方法及材料试验在本县电城河望乡油桁垌进行。品种用“青骨仔”。于1985年11月13日种植,1986年4月11日收,全生育期149天。植法用当地习惯单行植,畦距3.3尺,株距0.728尺,亩植2497苗。施肥按每亩基肥施土杂粪25担、硫酸钾20斤;追肥2次,第一次于植后33天施尿素
Low temperature frost is the main reason that my county’s winter sweet potato yield is not high and unstable. Over the years in cultivation still failed to find a better defensive approach. The purpose of this experiment is to use the role of plastic film can heat, light and moisture to explore the effects of plastic film mulching on winter potato yield and the corresponding cultivation techniques for the promotion of the field to provide the basis. First, the test methods and materials Testing in the town of River Hope Township oil truss 垌. Variety with “Green Aberdeen.” November 13, 1985 planted in April 11, 1986 received, the whole growth period of 149 days. Planting habits with the local single-plant, 畦 distance 3.3 feet, spacing 0.728 feet, 2497 acres planted acres. Fertilization by basal fertilizer per acre soil miscellaneous 25, 20 kg of potassium sulfate; top dressing 2 times, the first 33 days after planting urea