Effects of soil nutrients on nut qualities in Macadamia integrifolia
In order to discuss the effects of soil nutrients on nut quality in Macadamia integrifolia,and to provide some references for scientific fertilization,soil nutrient factors (organic carbon,total nitrogen,total phosphorus,total potassium and pH value) and nut quality indexes (fat,protein,oleic acid,palmitic acid,and eicosenoic acid) were investigated and analyzed for two continuous years in M.integrifolia nut orchards of Southwest Guangxi.The results showed that protein and fat in M.integrifolia nut were mainly affected by total nitrogen,total phosphorus and pH value in soil,oleic acid in nut was mainly affected by organic cadbon,total nitrogen and total phosphorus in soil,palmitic acid in nut was mainly affected by organic carbon,total nitrogen,total phosphorus and total potassium,and eicosenoic acid in nut was mainly affected by organic carbon,total phosphorus and pH value.The results of path analysis showed that fat,protein,oleic acid,palmitoleic acid and eicosenoic acid in nuts were respectively affected by soil pH value,total nitrogen,total nitrogen,and total phosphorus.The residual path coefficient of each nut quality index was larger,so there were some other influencing factors besides soil nutrient factors analyzed.Therefore,aiming need of targeted nut quality indexes,it should be done to properly increase total contents of nitrogen and potassium and to reasonably control fertilizer types in soli management.
NETL
NSTL
万方数据
维普
