关键词: 生态恢复, 生态恢复

Abstract:

In order to research the characteristic of nitrogen uptake and utilization under high nitrogen in cucumber, a field experiment was conducted with five cucumber cultivars at two N fertilization levels in high N field. The result showed that there were no significant variations in fruit yield, dry matter and total nitrogen absorption among different cucumber cultivars at high N supply, but it exited significant variations on nitrogen utilization efficiency at high N supply. At low N supply there were significant variations in fruit yield, dry matter, total nitrogen absorption and nitrogen utilization efficiency. The correlation and path analysis indicated that the nitrogen utilization efficiency had a dominant effect on improving cucumber yield on high N field whether or not fertilizer.