摘要
以玉米为研究对象,采用大田(大区对比)试验,通过分析3种行向(南北向、东西向、南偏西20°)和2种行距(65cm+65cm、160cm+40cm)对玉米生长状况的影响,揭示其生理生态机制,筛选出最有利于玉米生长的田间配置方式。结果显示,160cm+40cm有效延长了中上部叶片持绿期,增强玉米抗倒伏能力,延缓玉米开花后叶面积衰减速度。南偏西20°可以维持玉米上部叶片较高的SPAD值,延长玉米叶片持绿期,有效增加叶面积、叶面积指数及玉米开花后穗位叶的比叶重。南偏西20°、160cm+40cm有利于延长穗位叶持绿期。综上,南偏西20°、160cm+40cm有利于延长穗位叶持绿期,提高玉米产量效果最为明显。
With maize as the research object,field test (regional contrast) was adopted to analyze three row orientations (south-north,east-west,southwestern20°) and two row spacings(65 cm+65 cm,160 cm+40 cm).To find out the most suitable field configuration for maize growth,we investigated the effects of row orientation and planting pattern on growth of maize,as well as physiological and ecological mechanism.Results showed that160 cm+ 40 cm effectively extended the growth period in the upper and middle leaves of maize,enhanced the lodging resistance of maize and delayed the decay rate of leaf area after flowering.Southwestern20° could maintain higher SPAD values in the upper leaves and extend the green period of leaves,effectively increased the leaf area,leaf area index and specific leaf weight of ear leaf after flowering in maize.Southwestern20° and160 cm+40 cm was conducive to prolonging the green period and photosynthesis time of ear leaf.In summary,southwestern20° and160 cm+ 40 cm was favorable for prolonging the photosynthesis time of ear leaf and increasing maize yield.
作者
田畅
王洋
TIAN Chang;WANG Yang(Institute of Land Engineering Technology in Shaanxi Province Co.,Ltd.,Xi'an,Shaanxi 710075;Key Laboratory of Degraded and Unused Land Consolidation Engineerin Ministry of Land and Resources PRC Xi'an,Shaanxi 710075;Shaanxi Provincial Land Consolidation Engineering Technology Research Center,Xi'an,Shaanxi 710075;Northeast Institute of Geography and Agroecology,CAS,Changchun,Jilin 130102)
出处
《安徽农业科学》
CAS
2019年第12期44-47,50,共5页
Journal of Anhui Agricultural Sciences
关键词
行向
行距
玉米
生长状况
Row orientation
Row spacing
Maize
Growth status
