Studies On Physico-chemical Properties And Biological Effect Of Pelleting Rice Seed Coating Agent

Through indoor and field experiments, researches were carried on about the physico-chemical properties and biological effects of this pelleting agent. The studies of physico-chemical properties were carried on by indoor experiments,and the effects of this pelleting agent on biology were studies by means of experiment of field direct-seeding with coated rice seed. Meanwhile its studies were compared with those of Shileshi (a kind of seed coating agent made in Switzerland). The main results were summarized as follows:1. The physico-chemical properties of this pelleting agent with compound film-forming materials were better than those of Shileshi with single one, which can overcome film dissolving in water. And the good film-forming properties of this pelleting agent can guarantee the freely entering of water into the seed, which is necessary to seed germination.2. The rice seed in water can keep normal germination by the treatment of this pelleting agent. Because this pelleting agent contains peroxide which can escape oxygen in water, and the oxygen is necessary to seed germination. Otherwise Shileshi does not contain peroxide,and can not solve the problem that rice seed is difficult to germinate in water.3. Both of this pelleting agent and Shileshi showed favorable storage characters in the storage test. For example, their ph value and viscosity number kept steady, and no delamination and precipitation were found in the test.4. The seed which was coated by this pelleting agent can be stored safely about 12 months; and the seed which was coated by Shileshi can be stored safely about 9 months. The coated seed can be stored longer than the uncoated seed.5. The indoor germination experiment showed: Compared with uncoated controls, this pelleting agent can not only promote germination percentage and root vigor, but also change the root's growthform,such as making the root tubbiness and adding the...