Yield And Quality Analysis Of Spring Vegetable Soybean(Glycine Max(L.)Merr.)and Comparison Of Planting In North And South Of China

Vegetable soybean[Glycine Max(L.)Merrill]is a large seeded soybean which is harvested at R6-R7 stage when seeds are immature and pods are not turning yellow.As a nutritious,healthy and good taste food,vegetable soybean been consumed by lots of people.The present study investigated the differences in fresh pod yield and seed chemical compositions of 35 vegetable soybean varieties at edible stage;analyzed the correlations between seed chemical compositions and edible quality;determined the key component for vegetable soybean edible quality using correlation analysis;the varieties with good comprehensive traits were selected through the comparison experiment.At the same time,conducted the comparison experiments of spring soybean varieties in north and south of China(Yinchuan and Hangzhou),analyzed the differences of main agronomic and yield traits.The main results of the study were as follows:1.There were significant positive correlations between the yield traits and the leaf area index,net photosynthetic rate,plant height,bottom pod height and No.of nodes per plant,and the correlation coefficient between leaf area index and yield is 0.93**.2.Hangzhou nutritional quality analysis results showed that,the content of fresh seed sucrose was between 35.31 and 53.22 mg/g,and the free amino acid was between 138.20 and 650.73 mg/100g.The content of glutamic acid in free amino acid was 29.56?52.25%,which is the most abundant amino acid in the free amino acids.The content of essential amino acids is 9.39?21.69%of total free amino acids.3.The main influence factors of sweet taste were sucrose;the main influence factor of the flavor is the proportion of glutamic acid in the total free amino acid;the different varieties of vegetable soybeans boiled in boiling water for 5 minutes and 8 minutes,then the measurement of the hardness can be accurately expressed vegetable soybean hardness.For economic reasons,cooking in boiling water for 5 minutes and measuring its hardness can be used to evaluate its texture.4.Considering plant traits,yield traits and quality traits,S952-9 long inflorescence was the most prominent in the Hangzhou tested varieties.The big pods were big grains,beautiful appearance,good eating quality and relatively early maturity.Followed by KS,H18-25 and S952-35 yellow,respectively,in the big pod big grain,fresh pod yield,early maturity on the outstanding performance,and good edible quality.5.Through screening of 50 vegetable soybean varieties,considering growth period,plant traits and yield traits,it was concluded that S952 single3,001 green 6 and Zhexian 8 were excellent in Yinchuan,and could be used for further production,quality and resistance identification in Yinchuan.6.Southern spring vegetable soybean varieties planted in Yinchuan,from sowing to early flower growth period significantly delayed.The delay of the whole growth period was 41?49 days.The delay from sowing to emergence was 5?7d,emergence to early flower delayed 41?49d,early flower to picking earlier 1?11d.Due to strong vegetative growth,the plant performance was tall,the number of main stem nodes and effective branches increased,the effective pods per plant increased significantly,and the fresh pod yield was 2.3 times that of Hangzhou.But the results of planting in Hangzhou show the appropriate ratio of length and width,pod quality good appearance,100-fresh seeds weight high.