去叶处理对萝卜生长及产量的影响

在萝卜生长早期进行去叶处理,研究对中后期生长及产量的影响。结果显示,去叶后,净同化率明显下降,根冠比下降,比叶重降低,根、叶相对生长率降低,经济系数也有一定程度的下降,另外根直径与长度之比指标显示,肉质根膨大受到明显抑制而变小,始终不能恢复到对照水平,从肉质根减产百分率看各处理与对照相比减产非常明显。试验结果证实萝卜早期去叶对植株生长及产量形成有重要影响。

Influence of Defoliation on the Growth and Root Yield of Raphanus sativus var. longipinnatus

The results of the four trials to determine the effects of different defoliation treatments on radish (Raphanus sativus var. longipinnatus) yield are presented in this study. Four defoliation levels of 0(control), 33, 66 and 100% were applied at 5-leaf stage. The results demonstrate that the net photoassimilate rate, root/top ratio, relative growth rate of root and leaf, and economic coefficient after defoliation was reduced, and a close relationship between yield reduction and the defoliation treatment was observed. From the results of the experiment, it is found that defoliation treatment had a significant affect on the growth and yield of radish plants.