播种期对黄淮南部夏大豆品种熟期和产量的影响

Effect of Sowing Date on Maturity Date and Yield of Summer Soybean in Southern Huanghuai Region

黄淮南部夏大豆播期严重受茬口和降水制约,产量年度变幅较大。为给本地区麦茬夏大豆适期播种和品种的选择提供理论依据,选取8个不同熟期的黄淮南部适栽品种在大田条件下进行播种期试验。结果显示,各参试品种(除皖豆24外)4个播期均可成熟并获得产量;品种的熟期随播期的推迟而推迟,生育日数随之减少;4个播期中,除冀豆12以外,其他品种均以6月下旬播种产量最高,表明此时段是本地区大豆的最适播期。本试验初步明确了不同播期条件下各参试品种的熟期和相对高产的参试品种,可为当地大豆生产的品种选择提供参考。

Sowing date of soybean in southern Huanghuai region was severely restricted by crops for rotation and precipitati-on,which induced violently annual fluctuation of yield of soybean.In order to provide theoretical basis for selection of so-wing date and varieties of summer soybean after wheat,field experiment on sowing date was conducted in southern Huang-huai region with eight cultivars with different maturity periods as materials.The results showed that all varieties (except Wandou 24)could properly mature under four sowing date (SD).With the delay of sowing date,maturity date delayed and the whole duration became shorter obviously.All cultivars (Jidou 12)gained the highest yield under sowing in the last ten-day of June,which indicated thathe last ten -day of June was the most suitable time for soybean sowing in the re-gion.This study preliminarily ascertained the cultivars with higher yield and their maturity periods under different sowing time,which could provide reference for the selection of varieties in local soybean production.