杂交稻再生稻经济性状试验研究

Studies on Economic Characters of Ratoon Crop of Hybrid Rice

围绕我省当前再生稻发展需要，在大田生产中，采用１２个杂优组合对影响再生稻产量的因素进行研究，结果表明：再生穗和实粒数对产量的影响呈显著正相关；通过提高栽培水平。

Twelve common hybrid rice combinations were used to study in the factors affecting the yield of ratoon rice. The experimental results showed that in ratoon rice, effective panicles and filled grains per panicle were positively and significantly correlated with grain yield. Different stubble heights, fertilizing treatments and transplanted hills of the main crop all had a significant effect on the grain yield of ratoon rice. It is concluded that with 375 000 hills transplanted per hectare, 40 cm stubble height, 225 kg/hm 2 urea for enhancing seedling emergence, and 75 kg/hm 2 urea as panicle fertilizer, the optimum grain yield and economic efficiency could be approached in the south China rice growing areas.