韶关贡柑园植株叶片矿质元素特征及其与土壤养分的相关性  

Characteristics of Mineral Elements in Leaves of Citrus Gonggan and Their Correlation with Soil Nutrients in Shaoguan

作　　者：高琳[1,2] 胡晋豪 李凯诺 黄嘉华 仇佳豪 唐冰怡 GAO Lin;HU Jinhao;LI Kainuo;HUANG Jiahua;QIU Jiahao;TANG Bingyi(Henry Fok School of Biology&Agriculture,Shaoguan University,Shaoguan 512005,Guangdong,China;Yuebei Soil and Land Research Center of Northern Guangdong,Shaoguan University,Shaoguan 512005,Guangdong,China)

机构地区：[1]韶关学院英东生物与农业学院,广东韶关512005 [2]韶关学院粤北土壤土地研究中心,广东韶关512005

出　　处：《韶关学院学报》2023年第6期52-57,共6页Journal of Shaoguan University

基　　金：广东省大学生创新创业训练计划项目“特色贡柑农业园土壤质量分析及其调控优化”(S202110576067);韶关学院校级科研项目“粤北牛肝田土壤障碍因子消减功能性肥料创制与应用”(SZ2022KJ14);南雄市助镇帮镇扶村农村科技特派员项目“优质蔬菜集约化专业化安全生产”(雄工信联[2021]1号)。

摘　　要：研究韶关市贡柑叶片矿质元素以及果园土壤养分状况,为贡柑果园平衡施肥提供依据.2021年在广东省韶关市南雄贡柑果园布设20个采样点,采样测定贡柑叶片9种营养元素含量及土壤5种养分,同时分析两者的相关性.结果表明,贡柑叶片氮元素和磷元素均处于缺乏水平;钾、钙、镁元素以及微量元素铁、锰、铜、锌元素处于适量及适量以上水平,锌元素处于适量以下水平比例为85.71%.贡柑果园土壤pH介于4.00~4.69,均处于偏酸性状态;土壤有机质、碱解氮和速效钾含量较高,均值分别为53.58 g·kg^(-1)、286.41 mg·kg^(-1)和595.89 mg·kg^(-1),均处于过量状态;土壤有效磷含量均值为78.38 mg·kg^(-1),均高于适量状态.叶片钾元素与土壤碱解氮、有机质和速效钾呈显著正相关,叶片锰元素、锌元素与土壤pH均呈显著正相关;叶片铬、镉和汞元素与土壤碱解氮、有效磷和速效钾均呈显著正相关.贡柑果园整体土壤养分含量偏高,存在土壤养分和叶片元素需求不平衡问题,要注意科学合理施肥.The mineral elements and soil nutrients in leaves of Citrus gonggan were studied to provide basis for balanced fertilization of Citrus gonggan in Shaoguan.In 2021,20 sampling sites were set up to analyze nine mineral nutrient elements and five soil nutrient indexes in leaves and their correlations in gonggan orchard of Nanxiong City of Guangdong Province.The results showed that nitrogen and phosphorus elements in leaves were at the deficiency level.The average of potassium,calcium,magnesium,iron manganese,copper and zinc were in the moderate or above level,and the proportion of zinc below the moderate level was 85.71%.The soil pH was 4.00~4.69,and all of them were in a slightly acidic state.The soil organic matter,alkali-hydrolyzed nitrogen and available potassium were relatively high,with the mean values of 53.58 g·kg^(-1),286.41 mg·kg^(-1) and 595.89 mg·kg^(-1),respectively.The average of available phosphorus was 78.38 mg·kg^(-1),which was higher than the appropriate state.Leaf potassium were significantly positively correlated with soil alkali-hydrolyzed nitrogen,organic matter and soil available potassium,and leaf manganese and zinc was significantly positively correlated with soil pH;chromium,cadmium and mercury in leaves were significantly correlated with soil alkali-hydrolyzed nitrogen,available phosphorus and available potassium.The overall soil nutrient content of gonggan orchard was high and there are problems of unbalanced demand of soil nutrients and leaf elements.Scientific and reasonable fertilization should be paid attention to during production.

关 键 词：贡柑 叶片矿质元素 土壤养分 相关性 

分 类 号：S153.6[农业科学—土壤学]