不同种植年限半边红李营养品质及土壤养分特征的相关性研究OA

[Objective]The study aims to clarify the relationship between the nutritional quality and soil nutrient limiting factors of half-bor-der red plum in different planting years.[Method]The P.salicina cv.Banbianhong orchards planted in the 7,8,11,15 and 17 years were used as the research objects,the key fruit nutrient contents of total sugars,total phenols,total flavonoids and vitamin C,the changes of mas-sive,medium and micro-elements in the soil of the orchard were determined.The linear stepwise regression and redundancy analysis were used to explore the relationship between nutrient quality of plum fruits and soil nutrients at different planting years.[Result]The total sugar content of P.salicina cv.Banbianhong was the highest at 6.3 g/100 g in the 7 years.The total sugar,titratable acid,total flavonoids,amino acids,and malic acid of P.salicina cv.Banbianhong showed a decreasing trend with the increase of planting years,meanwhile,the rate of cit-ric acid was gradually increased.Compared with 7 years,total phenols and vitamin C were significantly increased by 297.28％and 69.18％,respectively,after 11 years of planting(P＜0.05).The quality of P.salicina cv.Banbianhong was mainly affected by planting year and soil content of manganese(Mn),zinc(Zn),calcium(Ca)and available phosphorus(AP).Then the contents of Ca,iron(Fe)and AP were in-creased and then decreased with the prolongation of planting year.The contents of Ca and AP had the greatest influence on the total phenol content of P.salicina cv.Banbianhong,and the contribution was 93.40％and 33.70％.The flavonoid content was mainly affected by the planting year and Ca,contributing 65.10％and 56.50％.The RDA analysis showed that with the increase in planting years,Mn,Ca and AP gradually became the limiting factors for the nutritional quality.[Conclusion]For the younger planting years of P.salicina cv.Banbianhong orchards(under 10 years),it is recommended that based on balanced application of nitrogen,phosphorus,and potassium fertilizers,especially the Ca and Fe fertilizers are supplemented.For planting more than 15 years,the Ca and phosphorus fertilizers are supplemented timely,and key supplementation with micro-nutrients Mn and Zn fertilizer.