关键词: 再生稻[49EJ], 母茎, 母叶, 产量[83AB]

Abstract: The effect of cutting node and the leaves retained on the mother stem on the growth and grain yield of rice ratooning, ere studied. The results were showed as follows:Retaining the flag leaf or the second leaf and the first inter-node(from top to bottom) of the mother stem could increase the dry weight and food reserves of the stubble. as a result. it reduced the percentage of dead bud. increased the tiller number and effective panicles of ratooning rice by some extent. But it would shade the ratoon plant, retarded its growth, as a result, the percentage of filled spikelets, filled spikelets per panicle and 1000-grain weight of ratoon plant decreased in this case. There were more effective panicles, more filled spikelets per panicle and higher percentage of filled spikelets on the ratoon plants origined from the third node after cutting the second node of the mother stem. The similar results, ere found on the ratoon plant origined from the fourth node after cutting the third node of the mother stem. It seemed that the apical dorminance, as broken in this case.

Key words: RATOON RICE, MOTHER STEM, LEAF ON THE MOTHER STEM, YIELLD