论文部分内容阅读
本文以日本滋贺县大津市桐生自然保护区的日本赤松（Ｐｉｎｕｓｄｅｎｓｉｆｌｏｒａ）、黑松（Ｐｉｎｕｓｔｈｕｎｂｅｒｇｉｉ）、扁柏（Ｃｈａｍａｅｃｙｐａｒｉｓｏｂｔｕｓａ）混交林小流域为研究地，以若女自然保护区内荒山小流域为对照地。通过对两个小流域为期一年的定位观测研究，测定了林外降水、流出水、穿透水、树干流中的ｐＨ值、电导率、钾、钠等１４种金属元素以及硅、硼非金属元素。研究结果表明，松柏混交林生态系统和花岗岩发育形成的土壤对雨水的ｐＨ值和金属元素等均具有较大的影响，但松柏混交林生态系统对其影响大于荒山。此外，系统内大多数元素的收入大于支出，呈积累趋势。关键词
In this paper, Pinus densiflora, Pinus thunbergii and Chamaecyparis obtusa mixed forest small watershed in Tongsheng Nature Reserve of Shizuoka, Shiga Prefecture, Japan were selected as research sites. . Based on the one-year long-term observation and observation of two small watersheds, 14 metal elements such as pH, conductivity, potassium and sodium in precipitation, effluent water, metal element. The results showed that the soil formed by coniferous-mixed forest ecosystem and granite had a great influence on the pH and metal elements of rainwater, but the mixed ecosystem of coniferous and cypress forest had a greater impact on the pH value and metal element. In addition, the income of most elements in the system is greater than the expenditure, showing a trend of accumulation. Key words