论文部分内容阅读
稻瘟病(Piricularia Oryzae Cav.)是水稻主要病害之一,给水稻的产量常常带来严重的损失。该病的发生与栽培技术的关系密切,尤其与施用氮肥的关系更为密切。试验结果表明:稻瘟病发生的严重程度,与氮肥施用量成正相关,即氮肥施用量越多,病害发生越严重。另外,在氮肥施用量相同的情况下,施肥时期、施肥次数和施肥方式,均与稻瘟病发生的严莺程度有关。一般规律是:早施氮肥比晚施氮肥发病轻:一次施足氮肥比分期、多次施氮肥发病轻。
Piricularia Oryzae Cav. Is one of the major diseases of rice and often causes serious losses to the yield of rice. The occurrence of the disease and cultivation techniques are closely related, especially with the application of nitrogen fertilizer more closely. The results showed that the severity of rice blast was positively correlated with the amount of nitrogen fertilizer applied, that is, the more nitrogen fertilizer applied, the more severe the disease occurred. In addition, in the same amount of nitrogen fertilizer application, fertilization period, the number of fertilization and fertilization methods, are closely related with the severity of rice blast occurrence. The general rule is: Early application of nitrogen fertilizer is less than the late application of nitrogen fertilizer: a time sufficient nitrogen fertilizer staging, multiple incidence of nitrogen fertilizer light.