河南省耕地氮、磷、钾化肥投入构成及其演变表明：氮肥所占比例在减少，而磷、钾肥所占比例逐步提高，但仍未达到合理的配比。磷、钾肥仍然不足。根据多年田间试验结果及施肥和农作物产量与携营养物质的统计分析，计算了河南省大量营养元素的平衡状况 The composition and evolution of input of nitrogen, phosphorus and potassium fertilizers in cultivated land in Henan Province indicate that the proportion of nitrogenous fertilizers is decreasing while the proportion of phosphorus and potassium fertilizers is gradually increasing, but it still has not reached a reasonable proportion. Phosphorus, potash is still not enough. According to the results of many years of field experiments and the statistical analysis of fertilization and crop yield and carrying nutrients, the balance of a large number of nutrients in Henan Province