茶要对修剪叶和不同氮肥对土壤pH和活性铝含量的影响

利用盆栽试验了茶树修剪叶和不同氮肥对土壤pH和活性铝含量的影响。结果表明，施用硫酸铵和茶树鲜叶，茶树干重显著增加。硫酸铵显著促进梢生长并提高氨基酸偏一，施茶树鲜叶显著促进茶树根系生长。施茶树鲜叶处理的土壤有机质含量显著提高，而且pH最高、活性铝含量很低。施用硫酸铵处理的土壤显著酸化。研究表明，茶园土壤酸化的主导因子是施用酸性化学肥料和茶树根系分泌的有机酸等，而并非茶树落叶和修剪叶还园。

Effect of Pruned Tea Leaf and Various nitrogen Fertilizers on Soil p H and Activated Aluminum Content

Effect of pruned tea leaf and various chemical nitrogen fertilizers on soil p H value, and activated aluminum content was invertigated by pot cultivation.The results showed that dry weight of tea plant was significantly increased by applying tea leaf and ammonium sulphate. Ammonium sulphate significantly stimulated tea shoot growth and increased amino acid content. Tea leaf significantly stimulated tea root growth.Soil treated with tea leaf had the highest organic matter content and soil p H Value,but the lowest activated aluminum content.Soil treated with ammonium sulphate was significantly acidified.It is suggested thatthe major factor resulting in tea soil acidification was the application of acid forming chemical fertilizers or organic acids in tea root exudation instead of fallen or pruned tea leaves.