摘要
调查了福建省安溪县、华安县和永春县等铁观音茶主产区的150个茶园表土和相应的茶叶镁素含量状况,探讨了铁观音茶园土壤镁素供应能力及其与土壤条件之间的关系。结果表明,供试铁观音茶园土壤全镁含量平均值为1.77 g/kg;其中以变质岩类发育的土壤全镁最高,而花岗岩类发育的土壤全镁最低。土壤全镁含量与有机质含量和0.02～0.002 mm粉砂粒含量呈显著正相关,与2～0.02 mm颗粒含量呈极显著负相关。该区域土壤交换性镁含量平均值仅为9.63 mg/kg,土壤普遍缺镁。土壤交换性镁含量与pH、有机质含量、全镁之间呈显著正相关,土壤镁有效度与<0,002 mm颗粒含量之间呈显著负相关。茶叶镁含量平均值为1.78g/kg,与交换性镁含量呈极显著正相关。
The contents and availability of magnesium （Mg） in surface soils and Mg contents of the corresponding tea leaves of 150 Tieguanying tea plantations in Anxi, Hua＇an and Yongchun Counties of Fujian Province were investigated. The supplying capacity of soil Mg and its relationships with soil conditions were discussed. The mean total Mg content of the soil samples is 1.77 g/kg. The total Mg contents of the soils derived from metamorphic rocks are higher than those derived from granites. There are positive correlations between the total soil Mg and the contents of organic matter and 0.02-0. 002 mm soil particles, respectively. The correlation between total soil Mg and content of 2-0.02 mm particle is negative. The average exchangeable Mg is only 9.63 mg/kg which indicates a widespread Mg deficiency in the tea plantation soils. The exchangeable Mg is significantly correlated with soil pH, organic matter content and total soil Mg. The availability degree of Mg （the ratio of exchangeable to total Mg） is significantly and negatively correlated with 〈 0.002 mm particles. The mean concentration of Mg in tea leaves is 1.78 g/kg, and there is a significant and positive correlation between Mg content in tea leaves and soil exchangeable Mg.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2009年第1期133-138,共6页
Journal of Plant Nutrition and Fertilizers
基金
中国地质调查局
福建省地质调查研究院项目资助。
关键词
铁观音
茶
土壤
镁
Tieguanyin
tea
soil
magnesium
