基于生物有效性的茶园土壤剖面磷素形态分布特征研究  

Distribution Characteristics of Phosphorus Form in Tea Garden Soil Profile Based on Bioavailability

作　　者：陈迎港 潘继花[1,2] 王艳玲 刘飞[1,2] 孙小银[1,2] 叶敦雨 Chen Yinggang;Pan Jihua;Wang Yanling;Liu Fei;Sun Xiaoyin;Ye Dunyu(School of Geography and Tourism,Qufu Normal University,Rizhao 276826,China;Jining Key Laboratory of Surface Ecological Remediation,Rizhao 276826,China;School of Applied Meteorology,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]曲阜师范大学地理与旅游学院,山东日照276826 [2]济宁市地表生态修复重点实验室,山东日照276826 [3]南京信息工程大学应用气象学院,江苏南京210044

出　　处：《山东农业科学》2023年第4期102-110,共9页Shandong Agricultural Sciences

基　　金：山东省自然科学基金面上项目(ZR2021MD088)。

摘　　要：为了解茶园土壤磷素有效性,以日照市茶园为研究对象,基于生物有效性分级法(BBP),对不同植茶年限和施肥模式的茶园土壤剖面(0~70 cm)磷素形态分布进行分析。结果表明:日照市茶园土壤剖面TP、Olsen-P含量分别为202.97~2334.49、12.20~317.50 mg/kg,随剖面深度增加,二者均呈降低趋势。随植茶年限延长,各土层TP、Olsen-P呈增加趋势,且在0~40 cm土层更为显著。施用有机肥茶园的表层土壤(0~20 cm)TP、Olsen-P含量显著高于施用化肥茶园。生物有效磷中CaCl_(2)-P、Enzyme-P、Citrate-P、HCl-P含量范围分别为0.03~46.60、0.15~60.07、1.73~39.89 mg/kg和3.73~294.64 mg/kg。各土层不同形态生物有效磷含量占比以HCl-P最高,Enzyme-P、Citrate-P次之,CaCl_(2)-P最低。随植茶年限延长,CaCl_(2)-P、Enzyme-P占比呈先增加后降低趋势,Citrate-P逐渐降低,而HCl-P则呈先降低后增加趋势。施用有机肥茶园的土壤CaCl_(2)-P、Enzyme-P含量高于施用化肥茶园。土壤磷素形态及有效性与土壤黏粒、砂粒及有机质等基本理化性质以及植茶年限、施肥方式等人类活动密切相关。综上,在茶园生产过程中,应根据茶树根系生长特点、土壤性质、植茶年限等状况进行差异化养分管理,避免磷素在土壤上层过度累积和淋失风险,保护茶园生态平衡。In order to understand the soil phosphorus availability in tea garden,the distribution of phos-phorus in soil profiles(0~70 cm)of Rizhao tea gardens with different planting years and fertilization patterns were studied based on the bioavailability grading method(BBP).The results showed that the contents of total phosphorus(TP)and available phosphorus(Olsen-P)in soil profiles of tea gardens in Rizhao City were 202.97~2334.49 mg/kg and 12.20~317.50 mg/kg,respectively,and both showed decreasing trends with the increase of profile depth.TP and Olsen-P contents showed increasing trends with the extension of tea planting years,which were more significant in 0~40-cm soil layer.The contents of TP and Olsen-P in the surface soil(0~20 cm)of the tea garden applying organic fertilizer were significantly higher than those applying chemical fertilizer.The contents of bioavailable phosphorus such as CaCl_(2)-P,Enzyme-P,Citrate-P and HCl-P ranged from 0.03~46.60,0.15~60.07,1.73~39.89 and 3.73~294.64 mg/kg,respectively.The proportion of HCl-P was the highest,followed by Enzyme-P and Citrate-P,and that of CaCl_(2)-P was the lowest among the bioavailable phosphorus types.With the extension of tea planting years,the proportion of CaCl_(2)-P and Enzyme-P showed the trend of first increasing and then decreasing,that of Citrate-P gradually decreased,and that of HCl-P showed a trend of first decreasing and then increasing.The contents of CaCl_(2)-P and Enzyme-P in the soil of tea garden applied with organic fertilizer were higher than those applied with chemical fertilizer.The shape and availability of soil phosphorus were closely related to soil basic physical and chemical properties such as clay,sand and organic matter,as well as human activities such as tea planting years and fertilization patterns.In the production process of tea,differentiated nutrient management should be carried out according to the growth characteristics of tea tree roots,soil properties,tea planting years and other conditions,so as to avoid excessive accumulati

关 键 词：生物有效性 茶园 土壤剖面 磷素形态 日照市 

分 类 号：S158[农业科学—土壤学]