Soybean Seed Yield Performances under Different Cultural Practices

Authors : Mehmet SİNCİK, Abdurrahim Tanju GÖKSOY, Zeki Metin TURAN

Pages : 111-118

View : 26 | Download : 8

Publication Date : 2009-04-01

Article Type : Research Paper

Abstract :This study was carried out to investigate the yield response of 2 soybean insert ignore into journalissuearticles values(Glycine max insert ignore into journalissuearticles values(L.); Merrill); cultivars to different planting dates and plant populations and to examine the relationships of seed yield with leaf area index insert ignore into journalissuearticles values(LAI); and total dry matter insert ignore into journalissuearticles values(TDM); during the vegetative and reproductive periods for planting dates, plant populations, and cultivars. Two soybean cultivars, A-3127 insert ignore into journalissuearticles values(early maturity group, MG-III); and 1530 insert ignore into journalissuearticles values(late maturity group, MG-IV);, were planted in 2 planting dates; mid-April and mid-May during 2005 and 2006 at high insert ignore into journalissuearticles values(660,000 plant ha-1); and low insert ignore into journalissuearticles values(330,000 plant ha-1); plant populations. Plantings in mid-April increased seed yield by about 10.0%-13.5% compared with mid-May plantings. High plant populations produced 17.7% higher seed yield than the low population. Seed yield of the late maturity cultivar was more than that of the early maturing cultivar. Significant and positive relationships between seed yield and LAI were evident for planting dates at all growth stages in 2005 and 2006. Seed yields at high and low plant populations were negatively and significantly correlated with LAI at vegetative stage insert ignore into journalissuearticles values(V5);, but positively and closely related to LAI at reproductive stages insert ignore into journalissuearticles values(R4 and R6); in both experimental years. The relationships between seed yield and LAI with early and late maturity cultivars were significant and positive at all growth stages except the V5 growth stage in both 2005 and 2006. Seed yield was positively and significantly correlated with TDM at all growth stages for planting dates, plant populations, and cultivars.
Keywords : Soybean, planting date, plant population, leaf area index, seed yield, total dry matter, yield components