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近年来,随着我县油菜面积的不断扩大,以及甘蓝型油菜品种的普及,油菜单位面积产量有了成倍增长.但在油菜生产中也出现一些新问题,其中以油菜缺钾症显得日趋严重和普遍,据不完全统计,1979年仅零星发生,而1980年就扩大到2000亩左右,占油菜总面积的6%.这些缺钾油菜一般要减产2-3成,严重田块减产更多.为了阐明油菜缺钾的症状、缺钾的临界指标和钾肥施用适期,进行了本试验.
In recent years, with the continuous expansion of rapeseed area in our county and the popularization of rapeseed varieties, the yield per unit area of rapeseed has doubled.However, there are some new problems in rapeseed production, Serious and common, according to incomplete statistics, only sporadic occurrence in 1979, and expanded to about 2000 acres in 1980, accounting for 6% of the total area of rapeseed These rapeseed rape generally reduce the production of 2-3%, a serious reduction in production of more plots In order to elucidate the symptoms of potassium deficiency in rapeseed, the critical index of potassium deficiency and the appropriate period of potassium application, the experiment was carried out.