育秧方式和栽插密度对“赣亚一号”产量形成的影响

研究了不同育秧方式和栽插密度对"赣亚一号"产量形成的影响,结果表明:旱育小苗移栽,可以促进分蘖,特别是前期分蘖,增加有效穗数,提高前、中期的干物质产量和叶面积系数,但存在无效分蘖多,后期群体质量差的不足;采用旱育小苗移栽的种植方式时应适当稀植,适宜的栽插密度为10～11万主茎苗/hm2;高产的主攻方向是提高成穗率和结实率,栽培上应及时控制无效分蘖,后期防止早衰和倒伏。

Effects of Growing Seedlings Methods and Transplanting Density on Yield Formation of Inter-subspecific Hybrid Rice "Ganya 1"

The effects of different growing seedlings methods and transplanting densities on the yield formation of inter-subspecific hybrid rice "Ganya 1" were studied, the results showed that growing little seedlings on dry bed could promote tillering, especially at the early stage, increase the number of valid panicles, and enhance dry matter production and leaf area index in the early and medium periods, but had few deficiencies such as more invalid tillers and lower quality of colony in the late period. The transplanting density of little seedlings raised on dry bed should be decreased to 100 000～110 000 seedlings with main stem per hectare. The main attack direction for high yield was increasing the rate of earbearing tiller and setting rate, the measures for high yield were controlling the invalid tillers in time, preventing premature decay and lodging at the late stage.