The Amount Of Soil Cyst Nematode Agronomic Characters And Yield Of Soybean Plants

Effect of the Amount of the Soyban Cyst Nematode around the Roots on the Agronomic Traits and Yield in Continuous Cropping soybean Yichun City in 2010 Shuangfeng completely random method of Forestry carried out with the rhizosphere soil of soybean cyst nematode on plant occurrence amount of the impact of agronomic traits. The results show that the variable rhizosphere soil of soybean plants the number of x and soybean cyst nematode, plant height, plant weight, pod number per plant, grains per plant, shriveled pod number, seed weight per plant, pod height and other variables y, related are negatively correlated, correlation coefficients were -0.339, -0.247, -0.361, -0.364, -0.344, -0.052, -0.330, -0.247, the T test showed that the rhizosphere soil of the characters and the number of cyst nematode correlation was not significant; but with the rhizosphere soil of soybean plants to increase the number of cysts, the above agronomic traits have declined, the rhizosphere soil of soybean plants with the increased number of cysts, these hazards have increased the agronomic traits of trend. Soybean Cyst number of rhizosphere soil of soybean quality traits analysis showed that soybean grain weight per plant disease correlation coefficient is -0.278, the T test negative relationship between the two, but not significant; soybean plant rhizosphere spore capsule number and seed weight per plant herbivory correlation coefficient was 0.275, a positive correlation between the two, but not significant, but with the rhizosphere of soybean plants to increase the number of cysts per plant, grain weight increased herbivory trend.Upon examination the rhizosphere soil of soybean plants with soybean cyst number, plant height, plant weight, pod number per plant, grains per plant, shriveled pod number, seed weight per plant, pod height and other variables in the regression equation is not significant regression coefficient b is negative, the above description of agronomic traits of soybean rhizosphere soil when each additional cyst nematode, the soybean plant height will reduce 0.566cm; individual plant will reduce full-weight 0.648g; soybean pod number will reduce 0.606; soybean pod number per plant will decrease deflated 0.008; soybean seed weight per plant will decrease 0.275g; pod height will reduce the 0.121 cm. Soybean Cyst number and rhizosphere soil of grain weight per plant disease regression equation is Y =- 0.003x +0.082, that when the soybean rhizosphere soil for each additional cyst nematode, soybean grain weight per plant disease will reduce 0.009g; and Fresh weight per plant and insect regression equation: Y = 0.011x +0.392, that when the soybean rhizosphere soil for each additional cyst nematode, soybean grain weight per plant herbivory will increase 0.011g. Above agronomic traits and the number of rhizosphere cyst nematode was no significant correlation and regression; but with the rhizosphere soil of soybean plants that occurs a few cysts increase of the amount against the above agronomic traits has increased the trend.