Effects of fertilizer and planting density on photosynthetic characteristics and yield of super-high-yielding soybean cultivar

Effects of different fertilizer levels and planting densities on photosynthetic characteristics and yield of super-high-yielding soybean cultivar of Liaodou 14 and common-yielding soybean cultivar of Liaodou 11 were studied.Results showed that the leaf photosynthetic rate of Liaodou 14 was higher than that of Liaodou 11 in different fertilizer treatments after full podding stage.The leaf photosynthetic rate of Liaodou 14 was higher than that of Liaodou 11 in the different planting density treatments after initial grain filling stage.The diurnal variation of photosynthesis of Liaodou 14 did not have noontime snooze at initial grain filling stage.In contrast to Liaodou 11,Liaodou 14 had much higher leaf area index during grain filling stage.High harvest index and strong lodging resistance were the typical traits of super-high-yielding soybean cultivar.