信阳茶区不同植茶年限土壤酶活性演变  

The Evolution of Soil Enzyme Activities in Different Tea Plantation Ages in Xinyang Tea-producing Area

作　　者：李贞霞 陈倩倩 胡宏赛 王广印 黎星辉[2] LI Zhenxia;CHEN Qianqian;HU Hongsai;WANG Guangyin;LI Xinghui(College of Horticulture and Landscape,Henan Institute of Science and Technology,Xinxiang 453003,China;Tea Research Institute,Nanjing Agricultural University,Nanjing 210095,China)

机构地区：[1]河南科技学院园艺园林学院,河南新乡453003 [2]南京农业大学茶叶科学研究所,江苏南京210095

出　　处：《生态环境学报》2018年第6期1076-1081,共6页Ecology and Environmental Sciences

基　　金：河南省高等学校重点项目(15A21000;18A210015);国家现代农业产业技术体系建设专项资金项目(CARS-19)

摘　　要：为了探讨信阳茶区不同植茶年限茶园土壤酶活性与土壤养分的关系,采集了不同植茶年限(0、10、20、30、40 a)0~20 cm土层土壤,分析4种土壤酶活性随土壤养分的演变特征。结果表明,过氧化氢酶、蔗糖酶活性与植茶年限呈显著负相关,与茶园土壤pH呈显著正相关;酸性磷酸酶活性与植茶年限相关性不显著;植茶土壤脲酶活性显著高于未植茶土壤,但与植茶年限相关性不显著。过氧化氢酶和蔗糖酶与土壤碱解氮、有机质、速效钾、NH4^+-N呈显著负相关,与速效磷、NO_3^--N的相关性不显著;酸性磷酸酶和脲酶与土壤pH、土壤养分相关性不显著。逐步线性回归分析表明,土壤养分对过氧化氢酶影响最显著的为碱解氮、速效钾与NH4^+-N,对蔗糖酶影响最显著的为有机质。土壤交换性离子对过氧化氢酶、蔗糖酶、脲酶影响最显著的是交换性Mg^(2+);对酸性磷酸酶影响最显著的是交换性K^+。土壤酶的几何平均数(GMea)随着植茶年限的延长而降低,说明随着植茶年限的延长,土壤质量下降。灰色关联度分析表明,与GMea关联度最高的4个因子为:交换性Mg^(2+)、土壤pH、NO_3^--N、速效磷。研究结果可为茶园土壤分析与评价、茶园土壤施肥及可持续生产提供科学参考。In order to investigate the relationship between soil enzyme activities and soil nutrient of different tea plantation ages in Xinyang tea-producing area, the soil samples of different cultivating years （0, 10, 20, 30 and 40） in the tea fields （0~20 cm） were collected to measure the soil nutrient and soil enzyme activities and to analyze the features of the evolution of soil enzyme activities with the change of soil nutrient. The results showed the activity of catalase and sucrose enzymes had a significant negative correlation with the tea plantation ages, while they showed a significant positive correlation with the soil pH value. The activity of acid phosphatase was not significantly correlated with the tea plantation ages. The soil urease activity of the tea plant was significantly higher than that of unplanted tea, and the activity of urease was not significantly correlated with the tea plantation ages. The catalase and sucrose showed a negative correlation with alkali-hydrolyzable nitrogen, organic matter, available potassium and NH^4＋-N, while they had no significant correlation with available phosphorus, NO3--N. The correlation between acid phosphatase and urease and soil pH and soil nutrients were not significant. The stepwise linear regression analysis showed that the most significant effects of soil nutrients on catalase were alkali nitrogen, available potassium and NH^4＋-N, the most significant effect on sucrose enzymes was organic matter. The most significant effects of exchangeable ions on catalase, sucrose enzymes and urease was the exchangeable Mg^2＋, while the most significant effect on acid phosphatase was exchangeable K^＋. The geometric mean （GMea） of soil enzymes reduced with the increasing of tea plantation ages which indicated that the soil quality decreased with the increase of tea plantation ages. The analysis of the grey correlation results showed that there were four highest correlation factors with GMea which were the exchangeable Mg^2＋, soil pH, NO3--N and availa

关 键 词：茶园 土壤酶活性 养分 交换性离子 

分 类 号：S154.2[农业科学—土壤学] X171.1[农业科学—农业基础科学]