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1979～1980年,上海郊区油菜高产联合试验共有11个试点,除高产试验外并结合栽培中的主要问题,分别进行不同苗势、春后追肥、生板移栽及花期观察(气候对结角率、结实率的影响)四个辅助试验。高产试验的11块田,共16.34亩,平均单产289.6斤(表1),比79年减产22.8%。考查结果与前二年相比:总角数减12.4%、粒数减36.1%、粒重增23.3%。此外,病毒病普遍比往年严重,特别是近郊蔬菜区和旱茬,有的发病率高达60%左右,是减产的重要原因。
From 1979 to 1980, 11 high-yielding joint trials of rapeseed in Shanghai suburbs included 11 pilot projects. In addition to high-yielding experiments and combined with the main problems in cultivation, the experiments were conducted under different seedling conditions, spring top dressing, plankton transplanting and florescence observation Rate, the impact of seed setting rate) four auxiliary tests. The 11 plots of high-yielding experiment, with a total area of 16.34 mu and an average yield of 289.6 kg (Table 1), reduced by 22.8% over 1979. The test results compared with the previous two years: the total number of corners reduced by 12.4%, the number of grains by 36.1%, grain weight by 23.3%. In addition, virus diseases are generally more serious than in previous years, especially in suburban vegetable areas and dry stubble, with the incidence of up to about 60%, which is an important reason for the reduction in output.