生态环境学报Issue(5)：785-790,6.
南方茶园红壤施用PAM对土壤理化性质和茶叶安全的影响
Effects of PAM application on soil physicochemical properties and tea safety in red soil tea garden of southern China
摘要
Abstract
It’s hard to apply traditional measures to control soil and water loss in sloping tea garden. However, the suitability of using PAM to control soil erosion in tea garden needs further study. In this research, the soil samples and the tea leaves were been collected in harvesting seasons (spring, summer and autumn), after different content of PAM (0,2,4,6,8,10 g·m-2) were applied inCamellia Sinensis tea garden. The effects of PAM on soil properties and tea safety were evaluated through analyzing the soil physicochemical properties and the AMD (monomer for PAM) residue in tea leaf. Results showed that the soil bulk density decreased in lower rates PAM application plots. Compared with the control plot, there is no significant difference of soil organic matter in different seasons of each treatment. However, the loss of soil available phosphorus (AP), available nitrogen (AN) and available potassium (AK) significantly declined in three harvesting seasons, and the plot applied 2 g·m-2 showed the highest level of AP, AN and AK. The ranges of residual AMD content in each treatments’ tea and soil samples were 0.011-0.095μg⋅L-1 and 0.008-0.036μg⋅L-1, respectively. They are much lower than the safety limit (0.5μg⋅L-1) of AMD. Consider using PAM can sustain soil fertility and it’s also safe for tea production. Therefore, applying PAM is a suitable measurement to control red tea garden’s soil erosion, and optimal PAM application rate is 2 g⋅m-2.关键词
PAM/土壤肥力/AMD残留/土壤环境/茶叶安全Key words
polyacrylamide/soil fertility/acrylamide residue/soil environment/tea safety分类
农业科技引用本文复制引用
王玺洋,黄炎和,林金石,葛宏力,蒋芳市,朱高立,李洪康..南方茶园红壤施用PAM对土壤理化性质和茶叶安全的影响[J].生态环境学报,2014,(5):785-790,6.基金项目
国家自然科学基金项目（41001169；40671113）；国家科技支撑项目 （）
