摘要
[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,接菌后第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对接种稻瘟病菌的响应时间,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。
[ 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 point and 3.4 resp. in comparison with that in the treatment without silicon and its relative control effect was up to 27.64% ; the leaf angle of flag leaf in the treatment without silicon was 16°, the leaf angle of flag leaf in the treatment with silicon applied was significantly smaller than that in the treatment without silicon and their difference value was 9°. All the silicon contents in the silicified dumbbell cells, papilla and the other surface regions of healthy leaves in the treatment with silicon applied were higher than that in the treatment without silicon. On the 5th clay since the rice plants were inoculated with pathogen, the silicon contents in the silicified dumbbell ceils, papilla and the other surface regions of leaves in the treatment with silicon applied got increased a little and that in the treatment without silicon was decreased obviously. The applicaton of silicon delayed the response time of POD and CAT to inoculated Magnaporthe grisea and the self-adjustment ability of SOD in the treatment with silicon applied was stronger that in the treatment without silicon after M. grisea was inoculated. [ Conclusion] In rice production, the silicon could still enhance the resistance of rice to rice blast obviously after leaf-developing stage.
出处
《安徽农业科学》
CAS
北大核心
2009年第23期11044-11046,11066,共4页
Journal of Anhui Agricultural Sciences
基金
农业部行业专项资助项目(200803008)
关键词
硅
水稻
稻瘟病菌
硅化细胞
抗病性
Silicon
Rice
Magnaporthe grisea
Silicified cell
Resistance to disease
