Studies on Transplanting Injury in Rice Plant : IV. Aspects of transplanting injury and recovery from it

Japanese Journal of Crop Science

Yoshinori YAMAMOTO¹  Kunihiro HISANO¹ 

关键词: Carbohydrate content;    植傷み;    Growth rate;    活着;    Nitrogen content;    含水量;    Rice plant;    水稲;    Root activity;    生長速度;    Rooting;    炭水化物含有量;    Transplanting injury;    窒素含有量;    Water content;    根の活力;   

DOI  :  10.1626/jcs.59.40

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

This study was carried out to clarify the aspects of transplanting injury and recovery from it in rice plant by the comparison of top and root growth, water content or organic constituents etc., in transplanted seedlings with those of non- transplanted ones raised under the same conditions. Transplanted seedlings did not show any symptom of leaf wilting in appearance, in spite of pruning 18% of root in dry weight. Leaf water content of these seedlings, however, decreased as compared with those of the non transplanted ones and this resulted in the inhibition of top growth rate, viz. transplanting injury, during about three days after transplanting. In transplanted seedlings showing inhibited top growth rate, the amount of carbohydrate, especially of total sugar, markedly increased, but those of nitrogen decreased as compared with the non-transplanted ones. The increasing ratio of carbohydrate was greater in order of stem > leaf sheath > leaf blade in top. The accumulated carbohydrate, especially in the stem, was preferencially utilized to promote the rooting of transplanted seedlings. After rooting, growth rate and carbohydrate or nitrogen content in the transplanted seedlings was restored to the same level as in the non-transplanted ones. These results suggest that growth retarding just after transplanting played a very important role in promoting the rooting process, that is, seedling establishment.

【 授权许可】

Unknown