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近年来,由于品种更新,氮肥施用量增加,密度增大等原因,水稻病害有逐年加重趋势。为了探索减轻水稻病害的途径,我县各地从改变施肥方面作了一些试验。一致表明,增施磷钾肥料,能减轻水稻病害。如高安县东方红公社左桥大队1979年进行晚稻施用磷钾肥试验,每亩增施磷肥60斤的,比单施氮肥纹枯病株率降低21.5％;每亩增施氯化钾20斤的,比单施氮肥纹枯病株率降低21.1％。华林艮山大队是稻瘟病重发山区,1979年试验每亩增施磷肥50斤,氯化钾10斤,使叶稻瘟的发病率平均降低了17.3％。石脑公社植保员试验,早稻分蘖期亩施氯化钾10斤,纹枯病株率比未施钾肥的降低19.2％;
In recent years, due to the breed renewal, the increase of nitrogen fertilizer application, the increase of density and other reasons, rice diseases have increased year by year. In order to explore ways to reduce rice disease, we made some experiments in our county from changing fertilization. Consistent that the increase of phosphorus and potassium fertilizer, can reduce rice disease. For example, the left bridge brigade of Dongfanghong commune in Gao’an County conducted the experiment of applying phosphorus and potassium fertilizer to late rice in 1979, adding 60 kg of phosphate fertilizer per mu to 21.5% less than that of spraying only the sheath blight of nitrogen fertilizer. Adding 20 kg of potassium chloride per acre , Which was 21.1% lower than that of the single application of nitrogen sheath blight. Hualin Genshan brigade is a rice blast reoccurrence of mountainous areas, in 1979 experiments increased phosphorus fertilizer 50 pounds per mu, potassium chloride 10 pounds, the incidence of leaf blast reduced by an average of 17.3%. Shibei Gongbao insurgents trial, early rice tillering Kushu Shi Kushu 10 kg, sheath blight rate was reduced by 19.2% compared with no potassium;