| Soybean flowers and pods are the main factor of soybean yield.Numerous studies and field observations indicate that a widespread phenomenon of flowers and pods abscission in soybean production,and the pattern of flower pod formation and shedding of different genotype soybean is not consistent.Maize-soybean intercropping is development in Southwest China in recent years a dry land and new high in multiple cropping intercropping mode.Intercropped soybean in the southwest region with less light but with abundant water resources,soybean plant Stem elongation,large leaf blade,flowers and pods abscission,the high flower pod shedding rate has become a prominent problem in agricultural production,which severely restricts the production of soybean in the southwest region.Therefore,the potential yield can be increased by selecting the cultivars and the number of soybean varieties,through the optimization of cultivation measures,the increase of the number of flowering pods was achieved,and the yield of soybean seeds was eventually increased.So a field experiment was conducted to analysis the effect of different soybean varieties agronomic characters,biomass,flowers and pods abscission on soybean yield.Those soybean varieties were Guixia 1,Gongqiudou 5,Nandou 12,CD5226,Nandou 20,Gongqiudou 4,Huaxia 6,Nandou 27,Gongxia 5104-1,F14168-182,F14119-130,Huaxia 9.It is hoped that by analyzing the relationship between the growth characteristic parameters and yield of different soybean varieties to study the variations of flowers and pods shedding of different soybean varieties.Preliminarily explained the reasons for abscission of the soybean flowers and pods,and the technology of controlling and reducing the production of soybean production is to be adapted to provide technical support for soybean production in southern China.The results are follows:1.The agronomic traits of different soybean are different.The highest soybean node numbers of main stem were Huaxia 9,Nandou 12,Gongqiudou 4;fewest were Gongxia 5104-1,CD5226,and Nandou 20.The stem diameter of Huaxia 9,Nandou 12,Nandou 20 were higher than Gongqiudou 5,Huaxia 6,Gongxia 5104-1,Guixia 1.The plant height of Nandou 27,F14119-130,Gongxia 5104-1,Nandou 12,Huaxia 6 were lower than Huaxia 9,CD5226,Nandou 20,Guixia 1.And shaded conditions have a higher level of branch number,secondary stem dry weight and leaf dry weight of low soybean varieties was south bean 12,with a low level of branch number,lower stem and leaf dry weight is Huaxia 9,a lower level of stem and leaf dry weight of soybean varieties are Gongxia 5104-1.2.Different soybean varieties showed obvious differences in flower pods,and different soybean varieties showed a higher rate of falling flowers,such as Gongqiudou 4,Gongqiudou 5,F14168-182,and the lowest flowering rate of Nandou 12.The abscission pod rate of Gongqiudou 5,Guixia 1,Gongqiudou 4,Gongxia 5104-1 was higher,F14119-130,F14168-182,Nandou 12,Huaxia 6 and 9,and Nandou 27 had a lower abscission pod rate.Found from the result of cluster analysis results of Huaxia 6 and 9 as flowering podding fallen petal fall pod yield decreased with more less,Guixia 1,Gongqiudou4 and 5,F14168-182,CD5226 flowers and pods rates were the middle stage and Nandou 12 and F14119-130 had less of flowers and pods abscission so that yields the highest.3.There was a significant correlation between the leaf area of different soybean varieties and biomass,the biomass and the shedding rate of the flowers and pods,and the yield of the flowers and pods.The leaf area of V5 was significantly negatively correlated with yield(-0.719**).The leaf area of R2 and R4 was significantly positively correlated with biomass,of which the correlation of R2 was 0.934**.The biomass of V5 was significantly negatively correlated with total flowering(-0.579*),and was also significantly negatively correlated with yield(-0.694*).The total flowering number and the total number of falling flowers were significantly positive correlation of 0.800**,with a significant positive correlation with yield of 0.598 *. |
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