Abstract:Three varieties including Quanliangyou 681,Quanyouhuazhan and Huanghuazhan with different methods of seeding and fertilization were used to investigate the tiller characteristics and yield of direct-seeded rice.Results showed that the primary leaf position of emerging tillers was during from 1/0 to 6/0.The rate of emerging tillers is pretty higher when the leaf position is during from 3/0 to 6/0.The secondary tilling position is 2/1,3/1 and 2/2.The emerging rate of secondary tillers is higher in the 3/1.These leaf positions ranged from 2/0 to 5/0,account for the panicle rate of primary tillers.Two leaf positions( 2/1,3/1 ) dominate panicle rate of secondary tillers.The rate of emerging tillers of mechanical seeding rice is higher than that of artificial seeding rice.The panicle rate of mechanical seeding rice is much higher compared with that of artificial seeding rice.The rate of emerging tillers and panicles is of a high level with four times fertilization.At the main growth stage,the dry matter accumulation and net accumulation is higher when rice was seeded mechanically under four times fertilization.From stage of tillering to jointing,the chlorophyll content decreased and was higher in the rice sowed mechanically with four times fertilization.The panicle of mechanical seeding rice had an advantage over the rice seeded artificially.The panicle characteristics of direct-seeded with four times fertilization had a better performance.The difference of yield under various treatments was significant(P＜0.01).The yield of mechanical seeding rice was significantly higher than that of artificial seeding rice(P＜0.05).The rice yield under four times fertilization was significantly higher than that of direct-seeded rice with 3 times fertilization (P＜0.05).The tendency of other yield components is in accordance with yield except for effective panicles.It is indicated that the tiller characteristics with different seeding and fertilization methods differs obviously.The mechanical seeding rice and rice with four times fertilization is useful for panicle rate of emerging tillers,chlorophyll content,dry matter accumulation,panicle traits and yield.