播期对皖北地区大豆农艺性状和产量的影响OA

To investigate the effects of sowing date on the yield and agronomic traits of soybean in Northern Anhui Province,this study took 4 locally prevalent soybean varieties(Zhonghuang 13,Wandou 37,Wanhua 518,and Sudou 219)as test materials,established 3 sowing date treatments including ultra-early sowing(sowing date Ⅰ),early sowing(sowing date Ⅱ),and optimum sowing(sowing date Ⅲ),and explored the variation patterns of agronomic traits and yield of different soybean varieties under different sowing date regimes.The results showed that regarding agronomic traits,the plant height of all varieties except Sudou 219 under sowing date Ⅲ was lower than that under sowing date Ⅰ and Ⅱ,the number of effective branches of all varieties except Wandou 37 under sowing date Ⅱ and Ⅲ lower than that in sowing date Ⅰ,the initial pod height of all varieties except Wandou 37 exhibited a high-low-high trend as the sowing date was postponed,the number of effective pods per plant of all varieties except Wanhua 518 and the number of 2-seed,3-seed and 4-seed pods of all varieties exception of 2-seed pods of Zhonghuang 13 and 3-seed,4-seed pods of Wanhua 518 showed an upward trend with the delay of sowing date;in terms of yield and its components,the number of seeds per plant,seed weight per plant(except Sudou 219),100-seed weight and total yield of all varieties showed an upward trend with delayed sowing dates,showing a ranking of sowing date Ⅲ＞sowing date Ⅱ＞sowing dateⅠ;in conclusion,it is recommended that the 4 soybean varieties should be sown at the optimum sowing date(sowing date Ⅲ)in Northern Anhui Province.