Effect Of Different Sowing Date And Transplanting Density On Grain Yield Of Yueguang-rice In Zhenjiang

The test set different groups, based on the influence from sowing days, cultivated density and their interaction to the yield of Yueguang-rice. Through the way, the best cultivated way could be found to provide basis for growing yueguang-rice in Zhenjiang.The test was carried on the practical farm of Jiangsu Polytechnic College of Agriculture and Forestry. The test variety was Yueguang-rice; the 3 test periods of sowing were May 5th(A,), may 15th(A2) (CK), may 25th (A3); the 4 kinds of density were 90000cavities/hm2(B1),180000cavities/hm2 (B2)(CK),240000cavities/hm2 (B3), 300000cavities/hm2 (B4), in total 12 treatments and repeating 3 times.(1) The result of the test indicates that in different sowing days with same density (B2), A 1 gets the highest yield, A3 the lowest. As for yield components, the number of productive ear, the maturing rate, the number of filled grains per panicle and thousand kernel weight all decrease as postponing the sowing days; the number of spikelets per panicle decrease at first then increase as postponing the sowing days.(2)While in different densities with same sowing days(A2), B3 gets the highest yield, B1 the lowest. As for yield components, the number of productive ear increases; the maturing rate, the number of filled grains per panicle decrease; thousand kernel weight and the number of spikelets per panicle change unclearly as increasing the densities.(3)The result of the test also indicates that the most remarkable level is got under the condition of A1B3, which is the better yield on the sowing day of May 5th and cultivated density 240000cavities/hm2. It proves that single Yueguang-rice can grow well sowing ahead of schedule under proper cultivated density. Although the number of productive ear in certain area can not increase, it is not prone to lodge. Otherwise, sowing ahead of schedule is good for accumulating dry matters, increase the number of filled grains per panicle thousand kernel weight, balance the yield components and increase the yield ultimately. While sowing behind schedule, although by the number of productive ear in certain area can be improved by increasing cultivated density, the number of filled grains per panicle and thousand kernel weight get low and the yield decreases.(4) According to the experimental results,Study on High-yielding Technique of Yue-guang Rice in zhenjiang area.