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(3)水稻营养状态:凡是生育繁茂徒长的水稻发病一般都较重,反之相对较轻。构成水稻徒长条件,主要是水肥管理不当,特别是与氮肥的关系最大,过量地集中偏施氮肥,使水稻发育成不抗病的状态。还有低洼地长期淹水田块,植株同样处于不抗病状态。一旦气象条件和病菌条件适宜,容易发病,
(3) The nutritional status of rice: those who grow lush leggy rice are generally heavier, on the contrary, relatively light. The composition of the water-conditioned conditions, mainly improper management of water and fertilizer, especially with the largest nitrogen fertilizer, excessively concentrated partial nitrogen fertilizer, so that rice developed into a non-disease state. There are low-lying flooded paddy fields for a long time, the same plants in the disease-resistant state. Once the weather conditions and germs suitable conditions, easy to disease,