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曲沃县吉许大队1977年以来,695亩棉田亩产135斤以上,1979年前期低温、中期干旱、后期病害严重,亩产仍达136斤。他们的高产经验主要是实行“六改”: 一、改不抗病品种为抗病品种。过去习惯种徐州1818或中棉7号,这些品种不抗病,1977年以后,改用陕401抗病品种,这是获得高产的一个重要原因。二、改等行距为宽窄行。过去多采用1.8尺或2尺的等行距种植方法,操作管理
Quwo County Jiyu Brigade since 1977, 695 acres of cotton yield more than 135 pounds, the low temperature in early 1979, mid-term drought, the latter part of the disease is serious, still yield 136 pounds per mu. Their high-yielding experience is mainly the implementation of “six changes”: First, change the disease-resistant varieties not resistant varieties. In the past habitual species of Xuzhou 1818 or Zhongmian 7, these varieties are not disease-resistant, after 1977, switched to the 401-resistant varieties, which is an important reason for the high yield. Second, change the line spacing for the width of the line. In the past to use more than 1.8 feet or 2 feet of line spacing planting methods, operation and management