论文部分内容阅读
本试验以常规稻6—38和杂交稻威优64等六个品种为材料,进行了新型植物生长调节剂——多效唑,对培育二晚壮秧和生理基础与增产效果的研究。试验结果表明;二晚秧苗在一叶一心期,每亩喷300PPM 浓度的多效唑100公斤药液,能有效地对二晚秧苗起到控长、促蘖、培育壮秧的作用。处理后秧苗的高度比对照降低1/3～1/4,分蘖数增加80～120%,叶片表现短、宽、厚,苗体矮壮。这种壮秧移栽本田后无败苗现象,没有明显返青期,禾苗早生快发,分蘖多、有效穗增加。多效唑对于秧苗的生理效应表现为;增加秧苗的发根力,具有发达的根系,吸氮能力增强,苗体含氮量和叶绿系含量增加:光合速率增强。处理后的秧苗,碳——氮代谢均旺,而且这种生理效应一直维持到抽穗期,有利于营养体生长和籽粒灌浆结实。试验表明,多效唑处理后水稻能增产10%左右。
In this study, we used six varieties of conventional rice (6-38) and hybrid rice (Weiyou 64) as materials to study the effects of the new plant growth regulator, paclobutrazol, on the two-year-old seedling and its physiological basis and yield enhancement. The results showed that: two nights seedlings in a leaf one heart, spraying 300 PPM per acre concentration paclobutrazol 100 kg liquid, can effectively control the two late seedlings, tillering, cultivating strong seedling role. After treatment, the height of seedlings decreased by 1/3 to 1/4 and the number of tillers increased by 80-120%. The leaves showed short, wide and thick, and the seedlings were short and strong. This strong seedling transplanting Honda after the phenomenon of no-lose seedlings, there is no obvious turn green, early seedlings quick hair seedlings, tillers and more effective panicles increased. The effect of paclobutrazol on the physiological effects of seedling was as follows: the rooting ability of seedling increased, the root system was developed, the ability of absorbing nitrogen increased, the content of nitrogen and chlorophyll increased; the photosynthetic rate increased. The treated seedlings were both carbon-nitrogen metabolized, and the physiological effect was maintained until the heading stage, which was conducive to vegetative growth and seed filling. Experiments show that paclobutrazol treatment of rice yield increase of about 10%.