河南农业科学2012，Vol.41Issue(1)：32-35,39,5.
淹水历时与排水对夏玉米叶面积和产量的影响
Effects of Flooding Duration and Drainage on Leaf Area and Yield of Summer Maize
摘要
Abstract
By imposing different irrigation treatments on summer maize (Zea mays L. ) grown under a rain shelter, the effects of different flooding duration and whether drainage or not on leaf area,yield and its components of summer maize were studied. The results showed that the number of green leaves and leaf area index (LAI) of summer maize decreased sharply with the flooding duration increased. Compared with CK ( no flooding) , under drainage conditions, the number of green leaves of FD4, FD5, FD6, FD7 , and FD9 decreased by 12. 50%,10. 71% ,19. 64%,32. 14% and 42. 86% , respectively, and that of FUD4, FUD5, FUD6 decreased by 21. 43%,37. 50% and 51. 79% ,respectively,under no drainage conditions. The magnitude of LAI changes of each treatment was similar to the number of green leaves. Compared with CK,the average LAI of treatments with drainage conditions decreased by 21. 81%, and that with no drainage conditions de-creased by 38. 32%. Under the same flooding duration condition,the inhibition effect of no drainage treatments on leaf area was significantly higher than that of the drainage treatments. As the flooding duration was increased,ear length,grains per spike and kernel weight tended to decrease, bald tip tended to increase,and grain yield and biomass production showed increasing degree of reduction. Compared with CK,under the drainage conditions with flooding duration over 5 d,the cut rate significantly increased,with flooding lasting for additional 1 d,the cut rate increasing of 7%. Under no drainage conditions, the grain yield of FUD4,FUD5 and FUD6 reduced by 34.06%, 49. 64% and 58. 82% respectively. At the same flooding duration of 4,5 and 6 d,the difference of the cut rate between drainage and no drainage was 31. 20,45. 57 and 40. 82 percentage points,respectively. The drainage index of summer maize was proposed in this region. The flooding duration under drainage conditions should be less than 6 days in tasseling stage,and the reduction of yield could be controlled within 5%. In the absence of drainage conditions, the flooding duration should be less than 4 days,otherwise,yield would decrease by more than 30%.关键词
淹水历时/排水/叶面积/产量/产量性状/夏玉米Key words
flooding duration/drainage/leaf area/yield/yield characters/summer maize分类
农业科技引用本文复制引用
刘战东,肖俊夫,冯跃华,刘祖贵..淹水历时与排水对夏玉米叶面积和产量的影响[J].河南农业科学,2012,41(1):32-35,39,5.基金项目
国家现代玉米产业技术体系建设专项资金项目(nycytx-02) （nycytx-02）
