关键词: 氮肥利用率, 氮肥利用率

Abstract:

To explore physical and chemical properties of rice seed-pelleting agent for providing reference for no-tillage and direct-seeding cultivation of rice, the physical and chemical properties of seed-pelleting agent WHW-25 were studied by means of experiments of film-forming and storage of seed-pelleting agent, and experiments of water absorption, underwater germination and storage of pelleted rice seed. Meanwhile its effects were compared with those of a export seed -coating agent. Results showed that the seed-pelleting agent had good properties in film-forming, film uniform and water permeability. The germinant energy and germinant rate of the pelleted rice seed increased 36.3% and 33.5% compared with uncoated controls, respectively. After 12 months’ storage, the germinant rate of the pelleted rice seed increased 35.6% compared with uncoated controls. The general effects of this seed pelleting agent were obviously better than those of the export agent used in this experiment. These results indicated that the seed-pelleting agent could markedly promote seed germination underwater and improve safety storage of rice seed, its physical and chemical properties were good.