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上海郊区地下水位高,油菜生育期间雨水较多。例如,移栽时遇秋雨湿耕烂种;花角期遇春雨,病害加重。雨水多的年份,对油菜高产稳产的威胁更大。据统计,近20年中,郊区油菜有11年减产,每次减产的幅度平均为18.9%,主要原因是湿害所致。防御油菜湿害,除搞好农田水利建设,提高栽培技术外,还必须注意选用和培育耐湿性的品种。为此,我们进行了下列试验。一、试验方法本试验在防雀网水泥地条件下进行,面积7.2平方米,分湿池组和旱池组,品种7055、809(品系)和胜利青梗。每池种66株,11月2日移栽,管理同大田一样。湿池组在
Suburbs in Shanghai have a high groundwater level and more rains during rapeseed growth. For example, wet transplanting transplanting wet farming rotten; flower angle of spring, the disease worsened. Rainy years, the greater the threat of high and stable rapeseed production. According to statistics, in the past 20 years, there has been a 11-year reduction in output of rapeseed in the suburbs, with an average of 18.9% reduction in each reduction. The main reason is the result of wet injury. Defense rape wet injury, in addition to improve farmland water conservancy and improve cultivation techniques, but also must pay attention to the selection and cultivation of moisture-resistant varieties. To this end, we conducted the following test. First, the test method The test under the conditions of the anti-bird net cement area of 7.2 square meters, wet pool group and drought pool group, the varieties 7055,809 (strains) and the victory of the green stems. 66 plants per pool, November 2 transplanting, the same management with the field. Wet pool group in