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在河南省不同钾含量水平的土壤上进行多点油菜钾肥试验 ,分析了钾肥对油菜生产及产量的影响。结果表明 ,油菜施用钾肥有明显的增产效应 ,尤其在土壤速效钾含量低于 1 2 0mg/kg时。钾肥对油菜的增产效应与土壤速效钾含量呈极显著负相关 ,单位钾肥的增产效益存在类似趋势 ,因此 ,油菜钾肥应着重施用在速效钾低于 1 2 0mg/kg的土壤上。
The multi-spot rapeseed potash experiment was conducted on soils with different potassium levels in Henan Province. The effects of potash fertilizer on rapeseed production and yield were analyzed. The results showed that the application of potash fertilizer rape had a significant yield-increasing effect, especially when the soil available potassium content of less than 120mg / kg. Potentiation effect of potash fertilizer on rapeseed yield was significantly negatively correlated with available potassium content, and there was a similar trend of yield increase per unit potash fertilizer. Therefore, rapeseed potash fertilizer should be applied to soil with available potassium less than 120 mg / kg.