摘要
以云南省普洱市澜沧县惠民乡景迈山大平掌古茶园为试验对象,设置不同管理方式(大量疏枝、免耕,少量疏枝、浅耕,不疏枝、浅耕,不疏枝、免耕),分别采集0～20 cm和20～40 cm土层土壤样,分别测定pH值、有机质、全氮、全磷、全钾、速效钾、有效磷、氨态氮、硝态氮含量及脲酶、蔗糖酶、过氧化氢酶、酸性磷酸酶、蛋白酶的活性.结果表明,少量疏枝、免耕管理方式可有效提高土壤有效磷(13.55 mg/kg)、速效钾(171.44 mg/kg)、全钾(13.27 g/kg)等养分的含量,更有利于古茶树的生长和发育;不疏枝、浅耕管理方式对提高古茶园土壤脲酶与蛋白酶的活性效果最佳,更利于提高古茶园的土壤肥力.古茶园的土壤理化性质与土壤的酶活性变化直接相关,其中土壤酸性磷酸酶和蛋白酶更适宜评价古茶园多数土壤性质的变化.
Abstract
Taking the Dapingzhang ancient tea plantation in Jingmai Mountain,Huimin Township,Lancang County,Pu'er City,Yunnan Province as the research object,different management methods were set up (large amount of thinning,no-tillage),(small amount of thinning,shallow tillage),(no thinning,shallow tillage),(no thinning,no-tillage),soil samples were collected from 0-20 cm and 20-40 cm soil layers,and pH value,organic matter,total nitrogen,total phosphorus,total potassium,available potassium,available phosphorus,ammoniacal nitrogen,nitrate nitrogen content,and urease,sucrase,catalase,acid phosphatase,protease activity were measured. The results showed that a small amount of thinning and no-tillage management could effectively increase the contents of soil nutrients such as available phosphorus (13.55 mg/kg),available potassium (171.44 mg/kg) and total potassium (13.27 g/kg),which was more conducive to the growth and development of the ancient tea trees,and no thinning and shallow tillage management had the best effect on improving the activity of urease and protease in the soil of ancient tea plantations,which was more conducive to improving the soil fertility of ancient tea plantations. The soil physicochemical properties of ancient tea plantations. were directly related to changes in soil enzyme activities,among which soil acid phosphatase and protease were more suitable for evaluating changes in most soil properties of ancient tea plantations.
基金项目
云南省重大科技专项(202002AA100007)
国家林业和草原局科技项目(2019130004-149)
国家科技期刊平台
NSTL
万方数据