松阳县茶园土壤pH值和主要养分分析

Investigation on pH and Major Soil Nutrients of Tea Plantation in Songyang County

对松阳县10个茶叶主产乡镇茶园土壤p H值和主要养分含量进行了分析。结果表明:茶园土壤酸化情况严重,p H小于4.5的土壤样品占比高达96.67%;土壤养分中,有机质整体水平偏上,平均值达28.4 g/kg,85%的茶园达到I级茶园和优质高效高产茶园标准;全氮平均含量为1.9 g/kg,90%以上茶园达到I级茶园和优质高效高产茶园标准;有效磷平均含量为160 mg/kg,93.33%的茶园达I级茶园和优质高效高产茶园标准;茶园土壤速效钾含量不足,平均值仅为73 mg/kg,含量达到I级茶园和优质高效高产茶园标准的土壤仅占16.67%和18.33%。因此,在茶园土壤管理中,重视酸性土壤的改良,施肥上应以平衡施肥为原则,因地制宜采取减氮、控磷、增钾、稳定有机肥等技术措施。

p H value and content of major soil nutrients of tea plantations in ten villages and towns of Songyang County were studied. Results showed that as much as 96.67% of all 60 selected soil samples had p H values behind4.5, indicating severe soil acidification. In terms of major soil nutrients, average content of organic matter was 28.4 g·kg-1and 85% of total soil samples reached the standard of class-I tea plantation with high efficiency and high yield.Meanwhile, average content of total nitrogen gained 1.9g·kg^-1and over 90% of total soil samples reached the standard of class-I tea plantation with high efficiency and high yield. Also, average content of available phosphorus was 160mg·kg^-1with 93.33% of samples reached the standard of class-I tea plantation with high efficiency and high yield. It is noteworthy that average content of available potassium merely got 73 mg·kg^-1while only 16.67% and18.33% of total soil samples reached the standard of class-I tea plantation with high efficiency and high yield.Thus,we suggested that management measures like nitrogen reduction, phosphorus controlling,potassium moderation and organic fertilizer supplement should be taken, with its focus on improving acid soil.