春玉米节根抗拉能力对耕作措施的响应  

Effects of tillage practices on root number and tensile properties in maize

作　　者：刘胜群[1] 佟殿文[2] 庄文君 宋凤斌[1] 杨小琴 李向楠 LIU Shengqun;TONG Dianwen;ZHUANG Wenjun;SONG Fengbin;YANG Xiaoqin;LI Xiangnan(Northeast Institute of Geography and Agroecology,CAS,Changchun 130102,China;Dunhua Agricultural Technology Promotia Station,Dunhua 133700,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院东北地理与农业生态研究所,吉林长春130102 [2]敦化市农业技术推广中心,吉林敦化133700 [3]中国科学院大学,北京100049

出　　处：《土壤与作物》2019年第3期288-292,共5页Soils and Crops

基　　金：国家重点研发计划项目(2017YFD0300607);国家自然科学基金项目(31000690)

摘　　要：玉米根系数量和抗拉性能与其倒伏抗性密切相关。本文采用大区试验,比较了垄作中耕和平作免耕条件下郑单958和先玉335的单株节根数量、较高茎节上节根数量以及节根的最大拉力和抗拉强度。结果显示,与平作条件下相比,两品种的单株玉米节根总数量和第五轮以上节根的数量均是垄作中耕条件下较高。第四轮节根的最大拉力在垄作中耕和平作条件下差异达显著水平,两品种均为平作条件下的大于垄作中耕;其他各节根的抗拉强度在垄作中耕和平作条件下差异均未达到显著水平。认为垄作中耕条件下,较高茎节上节根数量较多,对于根倒伏抗性有利。Lodging resistance of maize(Zea mays)is attributed to the quantity and tensile properties of nodal roots.We planted Zhengdan 958(ZD 958)or Xianyu 335(XY 335)in larger plots under ridge tillage or no tillage,and compared the numbers of nodal roots per plant and higher nodal roots,and tensile forces and strengths of all nodal roots,respectively.The results showed that the total number of nodal roots and the number of nodal roots above the fifth wheel under ridge tillage were significantly higher than those under no tillage.The maximal tensile forces of nodal roots at the fourth node under ridge tillage were significantly higher than those under no tillage,while the tensile strengths of nodal roots at other nodes were not significant differences between ridge tillage and no tillage.In conclusion,higher nodes of maize were with more nodal roots under ridge tillage,which would be beneficial to lodging resistance of maize.

关 键 词：拉力 抗拉强度 玉米 垄作 平作 

分 类 号：S513[农业科学—作物学]