纽荷尔脐橙果园稀土元素与果实品质的相关性研究

The Distribution of Rare Earth Elements in Newhall Navel Orange(Citrus sinensis Osbeck)Orchards in Southern Jiangxi Province and Their Correlation with Fruit Quality

赣南是我国柑橘主产区之一,也是离子型稀土发源地,而稀土元素对果树的生长发育存在Hormesis效应,且近几年生产上稀土肥的施用越来越普遍.因此,本试验探究赣南纽荷尔脐橙园土壤的稀土元素分布与果实品质的相关性,以期为稀土地区纽荷尔脐橙栽培提供理论依据.以江西寻乌、信丰、龙南地区共30个纽荷尔果园为采样点,采集土壤和果实,分析不同区域果园土壤的稀土元素分布情况及稀土元素分布与果实品质的相关性.结果表明,信丰、龙南、寻乌3个地区稀土元素总质量分数从大到小依次为信丰、寻乌、龙南;纽荷尔脐橙果实大小、可溶性固形物、果皮亮度和红色度与稀土元素质量分数呈正相关,而可食率和维生素C与稀土质量分数呈负相关;Ce,La,Eu和Yb是影响纽荷尔脐橙果实品质最主要的几种元素.

Southern Jiangxi province is one of the main producing areas of citrus in China,and it is also the birthplace of ionic rare earth.The rare earth elements have a Hormesis effect on the growth of fruit trees,and in recent years the use of rare earth fertilizers is becoming more common in fruit production.In order to provide a theoretical basis for Newhall navel orange cultivation in southern Jiangxi,the distribution of rare earth elements in this area and their relationship with fruit quality were studied.In this experiment,30 Newhall orchards in Xunwu,Xinfeng and Longnan of Jiangxi province were used as sampling sites to collect soil and fruit samples for the investigation of the distribution of rare earth elements.The results showed that the average total content of rare earth elements was the highest in Xinfen,followed by Xgunwu and Longnan in sequence.The contents of rare earth elements were positively correlated with fruit size,soluble solids and peel brightness and redness of Newhall orange,and negatively correlated with its edible rate and Vc content.Ce,La,Eu and Yb were the main elements influencing the quality of Newhall navel orange fruit.