Screening Test of New Winter Soybean Varieties Along the Border in Lushui City,Yunnan Province
Ten new soybean varieties were subjected to winter field planting trials to select suitable winter varieties in Lushui City,Yunnan Province.The plot area of each variety was 10 m2,the planting density was 18,000 plants·mu-1(1 mu≈667 m2),and local varieties were used as controls(CK)to compare the fertility,agronomic traits,and yield of the nine new soybean varieties.The re-sults showed that the comprehensive characteristics of Zhongdou 41,such as productivity,stress resistance,and commercialization,were better than those of the other nine varieties.The theoretical yield was 289.8 plants·mu-1,which was 44％higher than that of local varieties,and it could be popularized in the winter in the Lushui area.Not the higher the agronomic trait index,the higher the yield,moderate fertility,moderate plant height,and bottom pod height,and high 100-grain weight,effective branching,and effective pods per plant is the key to high yield,it is recommended that Lushui City,winter soybean sowing should not be earlier than the first ten days of December,so as not to encounter the impact of cold damage in the soybean flower and pod stage.
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