抛秧再生稻的初步研究

Preliminary Studies on Ratooning Rice of the Seedling-throwing Culture

通过两年两品种（组合）抛秧与常规手插的对比研究，阐述了抛秧再生稻的产量形成特点与成穗规律，得出抛秧再生稻能获得比手插再生稻相当或更高产量的结论．并对抛秧再生稻的高产机理及配套技术等问题进行了讨论．

Through the experiments on the comparision of the seedling- throwing Culture （STC） and hand-transplanting culture （HTC） for the main crop in 1991- 1992,it was found that the pods in the main crops and in the tatooning Crop of Shanyou 63, a hybrid rice combination, showed no much difference between STC and HTC, but the yield in the ratooning crop of ban 802, a conventional variety,was signifi cantly higher in STC than in HTC The analysis on the yield components indicated that, compared with HTC, STC obtained much more panicles per mu but fewer spikelets Per panicle, and had not much difference in seed set and grain weight in both main and ratooning crops. Concerning the Panicle constituents of the ratooning crops, the ratooning panicles of Zhefu 802 were from both the primary and secondary branches of the first two nodes above the ground, but those of Shanyou 63 were only from the primary branches of the lower three nodes over the ground. It was also discussed on the yielding mechanism and the cultural techniques of STC ratooning rice in the paper