苏皖南部丘陵茶园土壤的腐殖质组成及性质的研究

本文是对安徽祁门和十字铺、江苏宜兴和深水等地不同肥力水平的茶园土壤腐殖质含量、组成与性质的研究。土壤类型包括黄壤,红壤和黄棕壤。三个地区茶园土壤腐殖质组成都以富里酸为主,不同地区HA/FA值自黄壤向黄棕壤递增,同一地区高产茶园土壤HA/FA值大于低产茶园土壤,胡敏酸光密度值以黄壤最高,红壤居中,黄棕壤最低。

THE FRACTIONAL COMPOSITION AND CHARACTERISTICS OF HUMUS OF TEA GARDEN SOILS IN THE SOUTH HILLY REGIONS OF JIANGSU AND ANHUI PROVINCES

The fractional composition and characteristics of humus of high yield and low yield tea garden soil were investigated. The soil samples were collected from Qimen and Shizhipu of Anhui and Yixing and Lishui of Jiangsu, including yellow earth, yellow-red earth and yellow-brown earth.It was found that the content of humus and degree of humification were increased with years of tea plantation and intensity of soil management. The major type of humus was fulvic acid in all three kinds of soils. Ratios of HA/FA increased gradually from south to north. In each area, ratios of HA/FA were usually higher in fertile soils with high productivity but lower in poor soils with low productivity. In the HA fraction, large portion of active humic acid was found in almost all kinds of tea garden soils. The optical density (E_4) value of humic acid was high in yellow earth, low in yellow-brown earth, and intermediate in yellowred earth.