四川玉米生产的减灾技术对策

Counter-Measures Against Natural Calamity for Sichuan Maize Production

导致四川玉米产量波动的主因,在盆地内是“阵旱”,盆周山区及西部高原是冷害.本文阐述了在逆境下玉米胁迫致害的变化及减灾途径.评价了建立不同地域玉米——雨养栽培模式,选育耐旱优良杂交种、集约农作、规范栽培、保墒节水技术等对减灾的作用.

Factors resulting in maize yield fluctuation in Sichuan were analyzed in this paper. The results indicated that drought stress in the center of Sichuan basin,cold stress in the mountain areas around the basin and also in the western highland were two main factors causing maize yield loss. Furthermore, some proper agrotechniques against drought, such as establishing proper rainfed cultivation models in different areas,breeding elite hybrid varieties with drought tolerance,preserving moisture in the topsoil ,diminishing transpiration and intensive farming measures were also discussed