Application and Research on the Comprehensive Agronomy Measures of Summer Soybean High Yield Cultivation Technique in Huang-hui Plain
ZHANG Shen-ju et al (Shangqiu Vocational and Technical College, Shangqiu, Henan 476100)
With the five-elements two times orthogonal gyration combination design, comprehensive technical measures of over 3 750 kg /hm2 production were studied. The tesult indicated that during the sowing time from June 5 to 30 , Shang Soybean1099 was obviously higher than Zheng 9007 in production .It also showed that summer soybean's production was reduced by about 66～70 kg/hm2, when sowed a day later. June 15 was the last date to be sown. Within the proper period ,the yield level of quality agronomy measures was: applied quantity of fertilizers correspondingly was: N62.4～74.0?P2O5 109.2～129.5 and K2O 78.0～92.5 and its proportion was about 1:1.75:1.25. Its planting density was 192 000～199 000 seeds/hm2. Paclobutrazol was applied for 1 818～1 980 g/hm2. Irrigation time was from July 28 to Aug. 1. Borax was sprayed on surface of leaf for 1 338～1 542 g/hm2.