This experiment utilizes Wuxue Foshou yam as the material to investigate the control effects of six soil amend-ments,including soil loosening agent,Trichoderma harzianum,humic acid,chitin,and polyglutamic acid on the continu-ous cropping obstacles of Wuxue Foshou yam in terms of agronomic traits,paste-like head degree,yield quality,and soil nitrogen as well as potassium utilization rates.The results indicate that all six soil amendments can effectively improve the utilization rates of nitrogen and potassium fertilizers.Humic acid and chitin can reduce the length of yam tubers by 25.75％and 21.44％,respectively.Polyglutamic acid can increase the width of yam tubers by 47.28％,chitin can increase tuber thickness by 35.31％and soil loosening agent can increase the fresh mass of yam tubers by 13.30％.Compared with the control,the soluble protein,vitamin C,and soluble sugar content of yams treated with different amendments have sig-nificantly increased,with humic acid and chitin significantly improving the quality of yams.The six soil amendments can reduce the paste-like head degree of yams by 33.58％to 84.38％compared with the control,and increase the commercial yield by 3.27％to 18.01％.In summary,soil amendments can effectively alleviate the continuous cropping obstacles of yams,achieve quality improvement and yield increase,among which soil loosening agent has the greatest potential for yield increase.Humic acid and chitin have a certain promoting effect on yam quality,and polyglutamic acid can signifi-cantly increase the commercial rate of yams.
维普
万方数据
