瑞典南部相邻桦树和欧洲云杉林分的地表植被和土壤特征(英文)

Differences in ground vegetation and soil characteristics in adjacent birch and spruce stands of southern Sweden

对瑞典南部 2 3对相邻的桦树和欧洲云杉林分的地表植被和土壤特征进行了研究。桦树和欧洲云杉林分曲芒发草( Deschampsia flexuosa L.)和苔藓植物的频度几乎没有区别 ,但桦树林分越桔 ( Vaccinium myrtillus L.)和黑果越桔 ( Vac-cinium vitis-idaea L.)的频度远大于欧洲云杉林分的频度。欧洲云杉林分各层土壤 (腐殖质层、0～ 1 0 cm矿物质土壤层和1 1～ 30 cm矿物质土壤层 )的酸度稍大于桦树林分各层土壤的酸度。欧洲云杉林分土壤可交换性 K、Ca和 Mg离子的含量稍大于桦树林分土壤的含量 ,但差别不明显 ,只有可交换性 Na离子的含量在欧洲云杉林分土壤中明显偏高。由于现在硫沉降明显降低 。

Differences in ground vegetation and soil characteristics were studied in 23 adjacent birch and spruce stands in southernmost Sweden.There were almost no differences between the frequencies of Deschampsia flexuosa L.and mosses,but the frequencies of Vaccinium myrtillus L.and Vaccinium vitis idaea L.were significantly higher in birch than in spruce quadrats.Each soil layer (humus,0～10 cm and 11～30 cm)in spruce quadrats indicated slightly higher acidity than in the birch quadrats.Only was the content of exchangeable Na significantly higher in spruce than in birch quadrats,exchangeable K,Ca and Mg did not differ significantly,but were on average also slightly higher in the spruce quadrats.But the relatively higher dry deposition of cations in spruce than in birch canopies might to some extent, counteract acidification effects of spruce forests in southern Sweden when sulphate deposition has decreased strongly.