杂交水稻温室育秧喷施多效唑增产效应研究

Study on the Effects of Hybrid Rice With spraying Paclobutrazol in the Green - house During the Two-stage Breeding Seedlings

1991k 1993年在杂交水稻温室两段育秧中进行了喷施多效唑试验,结果表明在温室秧苗的1叶1心期知寄秧15天后两次喷施200PPM多效唑,可培育出多蘖壮秧,秧苗移栽本田后生理代谢增强,叶片的叶绿素含量和光合速率提高,后期灌浆速率增大,有效穗增加,小区试验稻谷亩产量增加17.82％,大面积示范推广的128000亩,平均亩增产稻谷69.55kg,增产率13.35％。

The experiment of hybrid rice sprayig paclobutrazol has been made in the green-house during the two-stage breeding seedlings in 1991-1993. The results indicated that the sprouts treated with pacJobutrazol of200 ppm twice ( at 1-2 leaf stage and after they weve transplanted to the temporary nursery for 15 days ) had more tilers and became stronger, planted in the paddy field, their physiological metabolism, the chlorophyll content in the leaves and the rate of photosynthesis all enhanced, while the rate of grain filling in later stage and the numberof effective panicles increased. The experiment of paddy rice grown in a plot increased to 17. 82% permu; and the demonstration populariring in a large area of 128000 mu.the average pen-mu paddy rice added to 69. 55kg; the rate of increasing amounts to 13.35%. Key words: paclobutrazol hybrid rice green-house seeding physiological action production effect