Influences of Forest Management Practices on pH and Electrical Conductivity in the Throughfall and Stemflow with the Abies holophylla and Pinus koraiensis Dominant Watershed

전나무림, 잣나무림 유역에서 수관통과우와 수간유하수의 수소이온농도 및 전기전도도에 미치는 산림시업의 영향

This research was conducted to evaluate the effect of forest management practices on pH and electrical conductivity to get fundamental information on water purification capacity after forest operation. Rainfall, throughfall and stemflow　were　sampled at the study sites which consist of Abies holophylla and Pinus koraiensis　in Gwangreung Experimental Forest for S months from May to November 1999. Mean pH of the throughfall of the beginning of the event was higher in management (thinning and pruning) sites of Abies holophylla and Pinus koraiensis stands than nonmanagement site of Abies holophylla and Pinus koraiensis stands. In addition, pH of the throughfall of the total amount of the event showed similar trends which are higher pH in the management sites compared with the non- management sites. This result indicates that managements such as thinning and pruning improve tree butler capacity of rainfall pH. According to the linear regression results, pH of the throughfall of the total amount of the event in non-management sites = 0.735${\times}$pH of the throughfall of the beginning of the event in non-management sites+1.849 ($R^2\;=\;0.82$) and pH of the throughfall of the total amount of the event in management sites= 0.863${\times}$pH of the throughfall of the beginning of the event in management sites +1.0242 ($R^2\;=\;0.87$). In case of stemflow pH, pH of the sternflow of the total amount of　the event in non-management sites = 0.53${\times}$pH of the stemflow of the beginning of　the event in non- management sites+2.7709 ($R^2\;=\;0.64$) and pH of the stemflow of the total amount of the event in management sites = 0.5854${\times}$pH of the stemflow of the beginning of the event in management sites+2.7045 ($R^2\;=\;0.65$). Electrical conductivity (EC) of the throughfall of the beginning and total amount of the event was highest in non- management site in Abies holophylla, followed by management sites in fsies Abies holophylla, non-management site in Pinus koraiensis, and management sites in Pinus koraiensis stands, respectively. According to the linear regression results, EC of the throughfall of the total amount of the event in non-managementsites = 0.4045${\times}$EC of the throughfall of the beginning of the event in non-management sites+26.766 ($R^2\;=\;0.69$) and EC of the throughfall of the total amount of the event in management sites = 0.6002${\times}$EC of the throughfall of the beginning of the event in management sites+8.0184 ($R^2\;=\;0.54$). In case of stemflow EC, EC of thestemflow of the total amount of the event in non-management sites = 0.6298${\times}$EC of the stemflow of the beginning of the event in non-management sites+11.582 ($R^2\;=\;0.72$) and pH of the stemflow of the total amount of the event in management sites =0.602${\times}$pH of the stemflow of the beginning of the event in management sites+20.783($R^2\;=\;0.49$).

이 연구는 전나무림과 잣나무림에서 산림시업에 따른 산림의 수질정화기능을 평가하기 위한 기초자료를 제공하기 위하여 광릉시험림 31, 33임반내 산림시업지 전나무림, 잣나무림 유역에서 1999년 5월부터 1999년 11월까지 7개의 단위강우를 대상으로 강우, 임내우를 강우직 후 초기와 그 이후 총량의 pH및 전기전도도 등을 분석한 결과는 다음과 같다. 1)초기수관통과우의 평균 pH는 전나무림 시업구>잣나무림 시업구>잣나무림 비시업구>전나무림 비시업구의 순이었으며, 총수관통과우의 평균 pH는 전나무림 시업구>잣나무림 시업구>전나무림 비시업구>잣나무림비시업구의 순으로 전나무림, 잣나무림 모두 시업구가 비시업구보다 수목의 pH완충효과가 더 발휘되는 것으로 분석되었다. 2)비시업구에서 총수관통과우의 pH=0.735${\times}$초기수관통과우의 pH+1.849($R^2\;=\;0.82$)이었고,　시업구에서 총수관통과우의 pH = 0.863${\times}$초기수관통과우의 PH+1.0242 ($R^2\;=\;0.87$)이었다. 또한, 비시 업구에서 총수간유하수의 pH=0.58${\times}$초기수간유하수의 pH+2.7709 ($R^2\;=\;0.64$)이었고, 시업구에서 총수간유하수의 pH=0.5854${\times}$초기수간유하수의 pH+2.7046 ($R^2\;=\;0.65$)이었다. 3) 초기수관통과우, 총수관통과우에서 평균전기전도도는 전나무림 비시업구>전나무림 시업구>잣나무림 비시업구>잣나무림 시업구의 순이었다. 4)비시업구에서 총수관통과우의 전기전도도=0.4046${\times}$초기수관통과우의 전기전도도+26.766 ($R^2\;=\;0.69$)이었고, 시업구에서 총수관통과우의 전기전도도=0.6002${\times}$초기수관통과우의 전기전도도+8.0184 ($R^2\;=\;0.54$)이었다. 또한, 비시업구에서 총수간유하수의 전기전도도=0.6298${\times}$초기수간유하수의 전기전도도+11.582 ($R^2\;=\;0.72$)이었고, 시업구에서 총수간유하수의 전기전도도=0.602${\times}$초기수간유하수의 전기전도도+20.783 ($R^2\;=\;0.49$)이었다.