增施硅肥对水稻抗稻瘟病的效果分析

目的]为硅肥在防治水稻稻瘟病中的应用提供理论依据。方法]通过硅肥对水稻稻瘟病的防治试验研究不同处理中水稻剑叶叶倾角、叶面硅的微域分布及其抗病相关酶的活性。结果]在抽穗期，施硅处理的发病率和病情指数分别比不施硅处理下降8．9个百分点和3．4，其相对防治效果达27．64％；不施硅处理的剑叶叶倾角为16°，施硅处理的剑叶叶倾角显著小于不施硅处理，其差值为9°。施硅处理的健康叶片的哑铃状硅化细胞、乳突及其他表面部位的硅含量均高于不施硅处理，接茵后第5天，施硅处理叶片的硅化细胞、乳突及其他表面部位的硅含量有所上升，不施硅处理的明显下降。施硅推迟了POD和CAT对接种稻瘟病茵的响应时间，接种稻瘟病菌后施硅处理的SOD自我调节能力强于不施硅处理。结论]在水稻生产中，展叶期之后硅仍能明显增强水稻对稻瘟病的抗性。

Effect Analysis of Adding Silicon Fertilizer on the Resistance of Rice to Rice Blast

Objective] The aim of the study was to provide theoretical basis for the application of silicon fertilizer in controlling rice blast.Method] The micro-distributions of silicon in the leaf angles and foliar of rice flag leaves in different treatments and the activities of their resistance-related enzymes were studied in the control experiment of silicon fertilizer on rice blast.Result] In heading stage,the incidence and disease index in the treatment with silicon applied were desreased by 8.9 percent poin...