【摘要】 <正> 本研究的定位试验林地设于四川省阿坝藏族自治州的理县境内,位于东经102°57’,北纬31°36’,海拔高度3,400米至3,700米之间,属青藏高原东部边缘的邛崃山东坡,岷江支流杂谷脑河上游的高山深谷地区。定位试验工作从1960年开始,连续五年至1964年结束。更多还原

【Abstract】 Permanent sample plots were laid under fir forest in the 31°36′ latitude north and102°67′ longitude east,between 3,400—3,700 metres above sea leval,in Miaro regionwestern Szechwan. Four forest types were chosen for the sample plots:1. Abietum-sinarundina-riosum,2. Abietum-hylocemicso,3. Abietum quercosum and 4. Abietum rhododendro-sum. Observation began in 1960 and ended in 1964.changes in soil water,soil tempera-ture,soil gas exchange（CO₂ in the soil air）,organic matter,leaching water（composi-tion lysimetric water）and soluble substances（available nitrogen,phosphorus,potassi-um,soluble ferric oxide and ferrous oxide）and soil acidity were recorded.Their dia-gnostic velue for classification of the fir forest soils are discussed.更多还原