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近年来,不少地方的油菜缺钾现象越来越普遍。在年内虽无明显症状,但到开春以后,随着油菜植株的加速生长,缺钾症状就渐趋明显。其主要症状表现为生长缓慢,叶片皱缩发黄,叶缘枯焦,分枝减少,花少荚稀,严重影响油菜籽产量的提高。据调查发现,油菜缺钾的原因固然与土壤有效钾含量偏低有关,但值得注意的是还有施肥上的原因——重氮轻钾。因此,要夺取油菜籽高产,必须早施、增施钾肥。
In recent years, many places of rape potassium deficiency is more and more common. Although no obvious symptoms during the year, but after the spring, with the accelerated growth of rapeseed plants, potassium deficiency symptoms become apparent. The main symptoms of slow growth, leaf shrinkage yellow, leaf margin Kujiao, branches to reduce, spend less pod thin, seriously affecting the rapeseed yield increase. According to the survey found that although the reasons for the lack of potassium in rapeseed and soil available potassium content is low, but it is noteworthy that there are fertilizers on the reasons - diazoxide potassium. Therefore, to seize rapeseed high yield, must be early, add potash.