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１９９２年在东洞庭湖区黄泥田等潴育性稻田中进行早稻氮磷、氮钾二因素肥料试验。结果表明，三种肥料对早稻产量的影响以氮肥最大，磷肥次之，钾肥最小。在当年早稻生长期间降雨偏多的特殊气候条件下，早稻病害的发生与氮肥的施用量呈显著的正相关，而与钾肥施用量则呈显著负相关，与磷肥施用无明显相关，本文还就其有关原因进行了初步分析。
In 1992 in the East Dongting Lake Huangdi Tian and other paddy fields in the early rice NPK, nitrogen and potassium two-factor fertilizer test. The results showed that the effect of three kinds of fertilizers on the yield of early rice was the highest with nitrogen fertilizer, the second with phosphate fertilizer and the smallest with potash fertilizer. Under the special climatic conditions with heavy rainfall during early rice growth in that year, there was a significant positive correlation between the occurrence of early rice diseases and the application rate of nitrogen fertilizer, but negatively correlated with the potassium fertilizer application rate, which was not significantly related to the application of phosphorus fertilizer The relevant reasons for a preliminary analysis.