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Journal of Agriculture ›› 2017, Vol. 7 ›› Issue (3): 1-4.doi: 10.11923/j.issn.2095-4050.cjas16100016

Special Issue: 水稻

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Effect on Yield of Super Rice‘Liangyou 616’: Seedling Age, Transplanting Density and Nitrogen Application Rate

  

  • Received:2016-10-13 Revised:2016-12-21 Accepted:2016-12-23 Online:2017-03-27 Published:2017-03-27

Abstract: To reveal the integrative effects of seedling age, transplanting density and nitrogen application rate on yield of middle-season rice‘Liangyou 616’, and study its high-yield cultivation technique, an experiment was designed by using the 311-A optimum regression, and a mathematics (regression) model was established between yield and the factors, seedling age, transplanting density and nitrogen application rate in the filed experiment. The results indicated that the effect of the three factors on yield was as following: nitrogen application rate >transplanting density > seedling age. With the simulation and optimization by computer, the results suggested that the optimal combination was seedling age of 30.4d, transplanting density of 204600 clump/hm2,and net N fertilizer of 168.75 kg/hm2, and the imitated highest yield was 9778.1 kg/hm2. The main agronomic measures of‘Liangyou 616’to achieving the yield of more than 8625 kg/hm2 were seedling age of 29-33 d, transplanting density of 172000-227000 clump/hm2 and net N application rate of 160.0-190.8 kg/hm2.