江西千烟洲试区杉木人工林降雨过程及养分动态研究

Rainfall process and nutrient dynamics of artificial Chinese fir plantation in Jiangxi Qianyanzhou experimental station

摘要: 定位试验研究千烟洲试区杉木人工林生态系统水文过程及养分动态结果表明，该森林生态系统年降雨量为1392．0mm，其中以林冠穿透雨形式输入林地水量占年降雨量的89．38％，以树干流形式输入林地水量占0.27％，林冠年截流量占10．35％。以地表径流形式输出该系统的水量占年均降雨量的9．4％。该森林生态系统中随降雨年输入的N、P、K、Ca、Mg、Fe、Mn、Sr、Zr、Na、Si l1种营养元素总量为144．032kg／hm²，随地表径流年输出林地养分总量为155．335kg／hm²，年亏损量11．303kg／hm²。

Abstract: Course hydrologic and nutrient processes of artificial Chinese fir forest were studied by located experiment．The results show that the average annual rainfall is 1392．0mm ，89．38％，0．27％，and 10．35％ of which are allocated to throughfall，stemflow，and canopy interception，respectively．The surface runoff output is 9．4％ of the average annum rainfal1．The annual inputting nutrient by rainfall in plantation ecosystem including N ，P，K ，Ca，Mg，Fe，Mn，Sr，Zr，Na，and Si，amounts to 144．032kg／hm²，and the surface runoff output is 155．335kg／hm² The annual net nutrient accumulation is -11．303kg／hm²．