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采用统计资料和农户调查相结合的方法,对山东省历年养分投入的数量、结构、比例以及平衡状况进行系统地分析。结果表明,山东省有机肥料投入严重不足,粮食作物的边际产量急剧下降,化肥养分利用效率相对较低,氮磷钾比例的失调仍然存在。增加有机肥料投入,提高化肥的利用效率,减少化肥的浪费和对环境的污染是今后全省施肥工作的重点。
Using the method of combining the statistical data with the household survey, the quantity, structure, proportion and balance of nutrient inputs in Shandong Province were systematically analyzed. The results showed that there was a serious shortage of organic fertilizers in Shandong Province, the marginal yield of grain crops dropped sharply, the utilization efficiency of chemical fertilizers was relatively low, and the imbalance of N, P and K ratios still existed. Increasing the input of organic fertilizers, increasing the utilization efficiency of chemical fertilizers, reducing the waste of chemical fertilizers and polluting the environment are the key points of fertilization in the future.