CAJ | 학술논문

[目的]揭示生长于不同环境的桉树幼林地径流特性.[方法]通过在广西钦州市低丘地区选择不同更新方式的巨尾桉幼林地建立径流小区,进行水土流失量及其养分流失量的定位对比监测研究.[结果]不同植被类型年均地表径流量为灌草坡(215.930 mm)＞萌芽林(168.499 mm)＞实生林(122.455 mm),地表径流量的季节变化为夏季(395.043 mm)＞春季(96.343 mm)＞秋季(19.452 mm)＞冬季(0 mm),与该区降雨量的季节分配相吻合.不同植被类型年土壤侵蚀量依次为实生林(7.220 kg/hm~2)＞灌草坡(6.345 kg/hm~2)＞萌芽林(6.285 kg/hm~2),土壤侵蚀量的大小主要取决于降雨强度.水土主要养分流失量为实生林(0.095 5 kg/hm~2)＞灌草坡(0.084 0 kg/hm~2)＞萌芽林(0.083 0 kg/hm~2),与土壤侵蚀量大小规律相一致,并显示出K＞N＞P.[结论]该地区不同植被类型幼林地表径流差异显著,其养分流失量各有差异.
[목적]게시생장우불동배경적안수유임지경류특성.[방법]통과재엄서흠주시저구지구선택불동경신방식적거미안유임지건립경류소구,진행수토류실량급기양분류실량적정위대비감측연구.[결과]불동식피류형년균지표경류량위관초파(215.930 mm)＞맹아림(168.499 mm)＞실생림(122.455 mm),지표경류량적계절변화위하계(395.043 mm)＞춘계(96.343 mm)＞추계(19.452 mm)＞동계(0 mm),여해구강우량적계절분배상문합.불동식피류형년토양침식량의차위실생림(7.220 kg/hm~2)＞관초파(6.345 kg/hm~2)＞맹아림(6.285 kg/hm~2),토양침식량적대소주요취결우강우강도.수토주요양분류실량위실생림(0.095 5 kg/hm~2)＞관초파(0.084 0 kg/hm~2)＞맹아림(0.083 0 kg/hm~2),여토양침식량대소규률상일치,병현시출K＞N＞P.[결론]해지구불동식피류형유임지표경류차이현저,기양분류실량각유차이.
[ Objective] The study aimed to reveal the surface runoff characteristic for forest land in young Eucalyptus grandis × E. urophylla grown in the different environment. [ Method ] Through 9elect different regeneration patterns of young E. grandis × E. urophylla forest to set up runoff plot in the low hilly district of Qinzhou in Guangxi Province and the location contrast and monitoring research was conducted on the amount of soil loss as well as nutrient loss. [ Result ] The annual surface rainfall amount of different vegetation types were: shrub-herb forest (215.930 mm) > sprouted forest ( 168.499 mm) > seedling forest ( 122.455 mm) and the seasonal variation of the rainfall amount were; summer (395.043 mm) > spring (96.343 mm) > autumn (19.452 mm) > winter (0 mm) , which was identical with the seasonal distribution of precipitation in this region. The amount of soil erosion of different vegetation types were as follows; seedling forest (7.220 kg/hm~2) > shrub-herb forest (6.345 kg/hm~2) > sprouted forest (6.285 kg/hm~2) and the amount of soil erosion mainly lied on rainfall intensity. The amount of soil nutrients loss were:seedling forest (0.095 5 kg/hm~2) > shrub-herb forest (0.084 0 kg/hm~2) > sprouted forest (0.083 0 kg/hm~2),which coincided with the law of the amount of soil erosion and the soil nutrient showed as K > N > P. [ Conclusion] The surface rainfall amount of young forest with different vegetation types had significant difference in this region and their soil nutrients loss amount was also differentiated.