Study on Effects of Rice-fishing Co-culture on Soil Quality and Rice Growth in Saline-alkaline Fields
The rice-fishing co-culture model integrates rice cultivation with the aquaculture,which not only saves space but also enhances water resource utilization.This study aims to explore the effect of the rice-fishing co-culture model on rice growth and provide a theoretical basis for improving soil quality in paddy fields and enhancing rice yield and quality in saline-alkaline areas.Under saline-alkaline conditions,the conventional rice cultivation model was used as the control group,while the rice-fishing co-culture model,which involved stocking Chinese mitten crabs in ring ditches,served as the experimental group.Samples in the tillering stage,the heading stage and the mature stage were respectively collected to measure the total root length,total absorbing surface area,root activity and physical and chemical properties of the soil.The results indicate that,compared to the conventional model,the rice-fishing co-culture model significantly increased the rice yield by 12.50%,the total absorbing surface area by 72.73%,93.22%and 50.89%,respectively,from the tillering stage to the mature stage,and the root activity by 11.76%,27.84%and 229.82%,respectively.The contents of soil organic matters,ammonium-N,effective-P and fast-acting-K quality ratio also improved significantly.The average plant height,the soil pH and electrical conductivity of soil reduced though.In conclusion,the rice-fishing co-culture model can,to a certain extent,improve paddy soil quality and promote rice yield and quality enhancement.
万方数据
维普
