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我省不少红苕产区,在红苕中后期田间管理中有进行翻藤的习惯。一般要翻二、三次,有的甚至翻多次。主张翻藤的人认为红苕翻藤可以降低土壤湿度,提高地温,防止徒长,有利于提高产量。但生产实践和科学实验证明,情况并非如此。据在红苕翻藤后的1周中测定,表土相对含水量仅降低1.6—4.5％,10厘米土层温度,仅升高0.3—0.7℃,对红苕块根的膨大起不到多大作用。相反,由于翻藤后扰乱了叶片的自然分布,损伤了大量茎叶,降低了光合效能,减少了营养
In our province, a lot of Hongzuo producing areas have the habit of turning over vines in the field management in the mid-late of Hongjian. Generally to turn two or three times, and some even turn over many times. Advocates who turn over the vine that red turnip vines can reduce soil moisture, increase ground temperature, prevent leggy, help to increase production. However, production practices and scientific experiments have proved that this is not the case. According to a week after the red cedar doffing determined, the relative water content of topsoil decreased only 1.6-4.5%, 10 cm soil temperature, increased only 0.3-0.7 ℃, the swelling of the root of red canthus play little role. On the contrary, due to disturbed the natural distribution of the leaves after vines, damaged a large number of stems and leaves, reduced photosynthetic efficiency and reduced nutrition