播期及种植密度对菏豆19号性状和产量的影响

[目的]为发挥菏豆19号大豆品种的高产潜力,探索其高产栽培技术.[方法]开展菏豆19号播期及种植密度试验.播期分别为5月19、30日和6月10、20、30日;种植密度分别为12.00万、17.25万、22.50万、27.75万、33.00万株/hm2.[结果]不同播期对菏豆19号株高、主茎节数、有效分枝数和百粒重的影响较小,但随着播期的推迟单株荚数、单株粒数、结荚高度逐渐降低.不同种植密度对菏豆19号百粒重的影响较小,但随着种植密度的增加,株高、结荚高度逐渐增加,而主茎节数、有效分枝数、单株荚数、单株粒数逐渐降低.5月19日播种且种植密度为12.00万株/hm2时菏豆19号产量最高,随着播期逐渐推后产量逐渐降低.[结论]要想菏豆19号夺高产应遵循“早播宜稀、晚播宜密”的原则.

Effects of Sowing Date and Planting Density on Characteristics and Yield of Soybean Cultivar Hedou No.19

[ Objective] The aim was to give paly to tile high yield potential of soybean cultivar Hedou No. 19, and explore it high yield cuhi- vation technique. [ Method] The trial of sowing date and planting 30, and June 10, 20, 30 ; the planting density was 12.00 ×10^4, density of Hedou No. 19 was conducted. The sowing date was May 19 and 17.25×10^4, 22.50 ×10^4, 27.75 ×10^4, 33.00×10^4 plants/hm2, resp. [Result] Different sowing date had smaller effects on Hedou No. 19＇s plant height, the main stalk pitch number, effective branch number, 100-kernel weight, while its number of pods and seeds per plant and the height of podding decreased gradually along with the delay of sowing date. Different planting density had smaller effects on 100 - kernel weight of Hedou No. 19, along with the increase of planting density, its plant height, the height of podding rose gradually, while its the main stalk pitch number, effective branch number, and the number of pods and seeds per plant of Hedou No. 19 reduced gradually. When the sowing date was May 19 and the planting density was 12.00 x 104 plants/hm2, the yield of Hedou No. 19 was the highest, along with the delay of sowing date, the yield decreased gradually. [ Conclusion] It should follow the principle of ＂early sowing should be rare, late sowing should be close＂ to win high yield of Hedou No. 19.