垄作与覆膜对春玉米根系特征和地上部生长的调控研究

项目名称： 垄作与覆膜对春玉米根系特征和地上部生长的调控研究

项目编号： No.31301282

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 农业科学

项目作者： 孔凡磊

作者单位： 四川农业大学

项目金额： 25万元

中文摘要： 以川中丘陵区为研究对象，针对该区季节性干旱频发、土壤瘠薄所引起的春玉米生长易遭受土壤干旱胁迫影响的问题，通过开展垄作覆膜田间定位试验，重点研究垄作覆膜措施对春玉米根系特征（形态、生理）和空间分布的影响及其作用机制，明确关键影响因素；并从作物地下部与地上部关系的角度分析春玉米根系特征对地上部生长发育的影响，揭示根系特征对玉米生长发育和产量的调控机制，为川中丘陵雨养区春玉米高产的耕作栽培调控途径提供理论依据和技术支撑。

中文关键词： 垄作；覆膜；土壤理化特性；根系特征；春玉米产量

英文摘要： The growth of spring maize was vulnerable because of the frequent seasonal drought and the barren soil in the hilly region of the Sichuan Basin. The field positioning experiments was conducted with ridge-cultivation and plastic film mulching. The research was focus on the effect of ridge-cultivation and plastic film mulching on root characteristics (morphology, physiology, spatial distribution) and its mechanism, and the key factors was identified. The effects of root characteristic on the spring maize growth and developments was analyzed from the relation of aboveground and underground portion, and the regulatory mechanism of root characteristics on the spring maize growth and yield was revealed. Finally this research could provide a theoretical basis and technical support for the high-yield cultivation and regulatory pathways of spring maize in the purple hilly region of Sichuan Basin.

英文关键词： ridge culture；film mulching；soil physic-chemical property；root characteristics； spring maize yield