论文部分内容阅读
棉花阳畦育苗移栽是1970年在北京市郊区开始试验成功并迅速大面积推广的一项新的棉花增产栽培技术。特别是对于无霜期较短的黄河流域棉区和北方棉区,采用阳畦育苗移栽,比直播棉田提早和延长约一个月左右的生育期。一般平均每株可结伏前桃3—4个,多的8—9个,而大田直播平均每株只有0.5—1.0个。由于早结、多结伏前桃和伏桃,棉株进入高温多雨季节,本身就能有效地调节营养生长与生殖生长这对矛盾,控制其中期旺长,使地力集中攻桃;减轻了中后
Transplanting of cotton yangling seedlings is a new cotton yield-increasing cultivation technique that was successfully tested in the suburbs of Beijing in 1970 and popularized rapidly. Especially for the cotton area and the northern cotton area of the Yellow River Basin where the frost-free period is short, the seedlings are transplanted in the Yangzi seedling, earlier and extended about one month than the direct-seeded cotton fields. Generally average per plant can bear volumn 3-4 before the peach, more than 8-9, while the field broadcast on average only 0.5-1.0 per plant. Because of the early knot, the multi-node pre-peach and the peach, the cotton plant enters the high temperature and the rainy season, itself can effectively regulate the contradiction between vegetative growth and reproductive growth, control the mid-term growth and make the soil strength concentrate on peach; Rear