冀东地区夏播大豆品种农艺性状和产量形成规律的探讨

本试验研究了原产地不同的大豆品种在冀东夏播条件下，农艺性状，生育期结构，生育期比（Ｒ／Ｖ），生物学产量，器官平衡，经济系数等影响产量的重要因素的表现。结果表明：夏大豆籽粒产量与株高，主茎节数，分枝数，单株荚数，单株粒数，碍粒重均呈正相关。冀东地区夏大豆要获得１５０－２００公斤／亩籽粒产量，主要农艺性状应达到：株高６５厘米，主茎１６节，分枝１－１．２８个，在２．０－２．２２万株／亩密度条件下，单株荚

STUDT ON DEVELOPMENT OF AGRONOMIC CHARIICTERS AND YIELD FOEMATION OF SUMMER SOWING SOYBEAN VARIETIES IN NORTHEASTERN HEBEI

The agronomic characters, growth period structure, organ equilibrum and yield components of soybean varieties coming from different districts were studied for 3 years under summer sowing condition in Changli, northeastern Hebei province. The results showed that the agronomic characters, growth period structure, ratios of reproductive vs. vegetative growth period (R/V), biomass. and economic coefficient performed regular variations under summer sowing condition in Changli. Positive correlations were observed between seed yield and plant height, nods No. of main stem, No. of branches, pods per plant, seeds per plant and 100-seeds weight respectively. On density of 25 - 30 thousand plants per mu, the obtaining of 150 -200kg/mu yield must be based on plant height 55 - 65 cm,1 - 2 branches and 16 nodes on main stem , and at least 25 pods, and 7 -9. 5 g seeds weight per plant, and economic coeffictent around 0. 35, and the biomass yield around 450 - 600 kg/mu at the same time. Seeds vield has a significant positive correlation with the total growth period. The better growth period structure in this area, is that the days from emergence to flowering is 30 -35 (?).flowering to maturity about 60 days, total growth period 90-95 days and R/Y. 8 - 2. 1. Varieties, coming form Jilin, Liaoning, Beijing and Shijiazhuang were .(?) germplasm resources for summer sowing soybeans in northeastern Hebei provinces.