The Effect of Water Deficiency on Root Growth and Yield of Soybean Seedling
In order to analyze the effects of different degrees of water deficit on growth indicators and physiological characteristics of soybean seedlings,soybean crops in Puyang County,Henan Province were used as material.Pot experiments were performed to analyze the effects of water deficit on root dry matter accumula-tion,physiological indicators,and yield.The results showed that the T1 treatment soybean root length,root di-ameter,root volume,and root vitality values were the highest,with values of 75.11 cm,12.43 mm,37.56 cm3,and 168.33 mg/g·h,respectively.The dry matter accumulation in soybean root systems during flowering,pod setting,and grain filling stages were the highest,with values of 3.17 g/plant,5.46 g/plant,and 6.05 g/plant,respectively.The dry matter accumulation in the soybean root system during the flowering,pod setting,and grain filling stages were lower than in the control group in the T2 and T3 treatments.The peroxidase activity,malondialdehyde content,soluble sugar content,and proline content in soybean roots showed an increasing trend,while the soluble protein content in soybean roots was firstly increased and then decreased.The protein content in T1 treatment was the highest,at 18.55 mg/g,significantly higher than other treatments,and the num-ber of nodes,grains per plant,pods per plant,and yield per plant of soybean were all the highest.Therefore,it is indicated that moderate water deficit during soybean seedling stage is beneficial for promoting soybean growth.
Soybean root systemSeedling stageWater deficitPhysiological index
万方数据
维普
