【摘要】 本文对江苏宜兴丘陵山区不同产量水平茶园土壤的肥力特性进行研究。提出高产茶园的土壤条件是:土层深厚,无障碍层,或粘盘层在60厘米以下,微团聚体发育较好,微形态观察表明,结构体呈树枝状孔隙;土壤有机无机复合体可达40～50％,有机质含量3～4％;土壤pH值4左右,交换酸度5～9毫克当量/100克土,活性铝含量较高,盐基饱和度<60％。与此同时,研究了低产茶园土壤的障碍因素,并提出改善土壤管理的措施。更多还原

【Abstract】 Characteristics of tea garden soils fertility on rolling hills in Yi Xing CoUnty, Jiangsu Province, have been studied in respect to their physical and chemical properties as well as inhibiting factors by comparison of soils Collected respectively from the high and the low yield tea gardens.1) The physical conditions of high yield tea garden soils are as follows: thickness of soil layers is greater than 1 meter without clay pan or with clay pan below a depth of 60 cm, well developed black-brown micro-aggre-gates with branch-like pores, an appropriate proportion of solid, liquid and air, texture from clay to loamy clay, dominat in hydromica, and the amount of soil organic-mineral complex from 40 to 50%. Further study on yellow brown earth shows that C/N ratios of the organo-mineral complexes range from 9.5 to 9.7, organic matter contents from 3 to 4.3%, and soil pH values about 4. The exchangable acidity ranges from 5 to 9 me/100g soil,while the active Al is high and base saturation is below 600%.2) Inhibiting factors of low-yield tea garden soils are as foliows:soil layer for root is thinner than 60 cm, heavy texture with clay pan,low porosity, low organic matter content, and lack of phosphate. To improve such soil conditions, it is suggested that deep plowing, deep application of phosphate, and addition of more nutrients and organic manure be practiced. Applying organic residues as mulches can reduce soil erosion.更多还原