The synergistic effect of seed coating agents and plastic film mulching on soybean yield in saline-alkali soil
In order to improve the salt tolerance and increase the yield of soybean in saline-alkali land,the optimal ac-tive substance composition and optimal compatibility mass concentration of the seed coating agent were screened through soy-bean germination experiments.The salt-tolerant and growth-promoting seed coating agent was prepared to conduct salt toler-ance test during seedling stage,and combined with plastic film mulching for field verification,respectively.The results indi-cated that salicylic acid,ascorbic acid,proline and potassium dihydrogen phosphate increased the germination rate of soy-bean.When the four active substances were mixed at the respective optimal mass concentration of 3/4,the germination rate was the highest and reached 75.6%.The seed coating agent significantly enhanced the salt tolerance and promoted the growth of soybean seedlings.The aboveground dry weight increased by 25.21%compared with the control.The root-related traits were also significantly better than those of the control group.In the field trials,the overall effect of the treatments was ranked as follows:the combination of the seed coating agent and plastic film mulching(T3 treatment)>the seed coating agent alone(T2 treatment)>plastic film mulching alone(T1 treatment)>the control(CK).Under T1,T2 and T3 treatments,soybean yield increased by 0.88 times,12.64 times and 25.97 times compared with the control,respective-ly.Under plastic film mulching,the soluble salt content in topsoil was 25.76%-27.27%lower than that of CK.From the re-sults,it can be concluded that the combination of the seed coating agent and plastic film mulching not only reduced the accu-mulation of salt in soil surface layer and improved water use efficiency of soybean,but also improved its salt tolerance and in-creased soybean yield in saline-alkali soil by regulating the physiological metabolism of soybean.
saline-alkali landseed coating agentplastic film mulchingsoybeanyield
万方数据
维普
