马铃薯旱作栽培干物质积累与分配

DRY MATTER ACCUMULATION AND DISTRIBUTION OF POTATO UNDER DRY FARMING

对内蒙古呼盟与乌盟旱作马铃薯优化栽培下的干物质积累状况进行了研究。结果表明 :马铃薯全生育期植株干物质积累量呈“S”型曲线变化 ,干物质积累速率呈单峰曲线 ,峰值出现在块茎快速增长期 ,干物质积累百分率以块茎增长后期至淀粉积累期较高 ;马铃薯生育期间不同器官干物质积累中心依次为叶片、地上茎、块茎 ;两地区不同品种优化栽培下的各项栽培生理指标均优于一般生产田和不施肥处理 。

The change of dry matter accumulation was investigated under dry farming optimum cultivation in the Hulunbeier and Wulanchabu of Inner Mongolia. The change of dry matter accumulation of potato per plant was a logistic curve. Dry matter accumulation rate was a conic curve with its peak occurring at the tuber bulking stage, and the percentage of dry matter accumulation was higher from late tuber bulking stage to starch accumulation stage. During the process of growth, the center of dry matter accumulation was in order leaves, above ground stems, and tuber. In both locations, physiological indexes under optimization cultivation were better than control, and the yield difference was at significant or highly significant level.