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本地区1981年早稻稻瘟病发生很严重,在生产上增加了成本(一般每亩农药费3—5元,多的达10元左右),还污染农田,降低了产量和质量。研究其发病因子及规律,探索经济、安全、有效的防治措施是必要的。本文从土肥方面的有关调查资料进行初步分析,试图为综合防治提供依据。一、土壤肥力1.有机质含量高稻瘟病轻,反之则重
In 1981, rice blast in early rice in this region was very serious, which increased the cost of production (usually 3-5 yuan / mu of pesticide and 10 yuan more), polluted the farmland and reduced the yield and quality. It is necessary to study its etiopathogenisis and rules and explore economical, safe and effective prevention and control measures. This article from the soil fertility aspects of the survey data for preliminary analysis, trying to provide a basis for comprehensive prevention and treatment. First, the soil fertility 1. High organic matter content of rice blast light, otherwise heavy