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对河北低平原潮土氮磷钾养分平衡状况进行了分析和评价。研究结果表明 :该地区养分收支情况为氮磷有盈余 ,而钾处于亏损状态。各养分的平衡系数分别为氮 1. 0 7～ 1. 4 1,磷 1. 14～ 1. 70 ,钾 0 . 72～0 . 96。氮磷钾养分的实际盈亏率都在允许的范围内。氮的盈余率为 4 . 75 % ,比允许值 4 7. 6 %低 ;磷的盈余率为 13. 7% ,比允许值 1. 6 %高 ;钾的亏缺率为 2 8. 1% ,比允许值 4 1. 3%低。总的来说 ,在该试验条件下 ,氮磷钾养分的盈余情况比较合理
The nutrient balance of nitrogen, phosphorus and potassium in the alluvial soils in Hebei low plain was analyzed and evaluated. The results show that: the region’s nutrient income and expenditure for the nitrogen and phosphorus have a surplus, while potassium is in a loss state. The balance coefficient of each nutrient is nitrogen 1. 0 7 ~ 1. 4 1, phosphorus 1. 14 ~ 1. 70, potassium 0. 72 ~ 0. 96. The actual profit and loss rate of NPK nutrients are within the allowable range. The nitrogen surplus rate was 4.75%, lower than the allowable value of 47.6%; the phosphorus surplus rate was 13.7%, higher than the allowed value of 1.6%; the deficit rate of potassium was 21.8% , Lower than the allowed value of 4.1.3%. In general, under the experimental conditions, the surplus of NPK nutrients is reasonable