江西农业大学学报Issue(6)：966-974,9.DOI:10.13836/j.jjau.2015147
稻草还田对机耕双季稻病虫草发生及产量的影响
Effects of Straw Returning to Paddy Field on Occurrence of Diseases, Insect Pests and Weeds in Double-cropping Rice and Its Yield Under the Condition of Mechanized Rotary Tillage
摘要
Abstract
The extension of production technology of mechanized rotary tillage for double⁃cropping rice un⁃der the condition of straw returning to paddy field depends on the knowledge of pest occurrence and rice yield formation.The localization field experiments with direct straw returning,straw ash returning and no straw retur⁃ning as the control for two years were conducted to study the effects of straw returning on occurrence of the pests in double⁃cropping rice and its yield under the condition of mechanized rotary tillage.The major pests were sheath blight disease ( Rhizoctonia solani) ,Chilo suppressalis,Cnaphalocrocis medinalis,Monochoria vaginalis andEchinochloa crusgalli in early rice in the 3 treatments without using pesticide,and sheath blight disease,C.sup⁃pressalis,C.medinalis,rice planthopper (Sogatella furcifera and Nilaparvata lugens),M.vaginalis and E.crus⁃galli in late rice under the conditions of equal nitrogen,phosphorus and potassium nutrients. Under the same conditions of fertilizer and water management,straw returning to paddy field had not significant effect on the occurrence of sheath blight disease, Chilo suppressalis, Cnaphalocrocis medinalis, Monochoria vaginalis and Echinochloa crusgalli in early and late rice in 2012—2013,but would increase weeds'density in early and late paddy fields.Variance analysis indicated that the average yields of early and late rice in 2012—2013 increased by 8.2% and 8.6% with direct straw returning compared with that without straw returning,respectively,and by 5.9% and 3.5% with straw ash returning,respectively.The diseases,insect pests and weeds in early and late rice with straw returning could be effectively controlled by applying appropriate pesticides during early days of pest occurrence.The average yields of early and late rice in 2012—2013 increased by 7.0% and 12.9%,re⁃spectively.关键词
稻草还田/病虫草/发生与防治/水稻产量/机耕Key words
straw returning to paddy field/pests/occurrenc and eefficacy/rice/yield/mechanized rotary tillage分类
农业科技引用本文复制引用
张建中,李保同,吴建富,潘晓华,石庆华..稻草还田对机耕双季稻病虫草发生及产量的影响[J].江西农业大学学报,2015,(6):966-974,9.基金项目
国家“十二五”科技支撑计划项目 （）
