超级杂交稻"淦鑫688"在鄱阳湖区作双季晚稻的产量、产量构成因素分析及其生产对策研究

对淦鑫688在鄱阳湖区作双季晚稻的产量及其构成因素的相关和通径分析表明,每公顷穗数对产量的直接作用和净作用最大,每穗粒数次之.当每公顷穗数少于2.55×106和理论产量在每公顷8.80×103 kg以下时,增穗是增产的关键;当每公顷穗数多于3.00×106和产量在每公顷1.00×104 kg以上时,关键是提高每穗总粒数.还提出了淦鑫688高产的穗粒结构及其栽培策略.

Analysis on the Yield and Yield Components of Super Hybrid Rice Ganxin688 Cultivated in the Poyang Lake Region of Jiangxi Province as Double-season Late Rice and Its Cultural Practices

The correlated responses of yield and yield components from the correlative and path coefficient analysis of Ganxin688 cultivated in the Poyang Lake Region of Jiangxi Province as double - season late rice showed that the direct and net effects of the number of the panicles per hectare on the yield were the maxi-mum , while those of the number of grains per panicle closely took the second place. When the effective pani-cles in the field were below 2.55×10~6 and theoretic yield per hectare under 8. 80×10~3kg, the increment of total effective panicles should be considered as the key factor in raising the yield. However, when the effective panicles and yield per hectare were higher than 3.00×10~6 and 1.00×10~4 kg respectively, efforts should be made to increase grains per panicle. In addition, the reasonable yield components for high yield and the corre-sponding cultural practice were suggested in this paper.