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为研究不同密度退耕雷竹春季林冠截留特性,对8个不同林分密度(10800±400、11600±400、13200±400、14800±400、16400±400、20800±400、22400±400和22800±400株·hm-2)的退耕雷竹林进行水文观测。结果表明:不同林分密度雷竹林外降雨与穿透雨、竹秆径流均具有极显著的抛物线函数关系,与林冠截留具有开口向下的抛物线函数关系;8个林分平均林冠截留率变化范围为1.42%~37.58%,林分密度与其最大截留量、平均林冠截留率呈开口向下的抛物线函数关系;当雷竹林分密度为17209株·hm-2时,其平均林冠截留率达到最大31.15%,最大林冠截留潜力为39.07 mm;可见,合理的林分密度可充分发挥退耕雷竹林的生态水文效益。
In order to study the interception characteristics of canopy forests in different densities of Thirteen plants, the density of eight different stands (10800 ± 400, 11600 ± 400, 13200 ± 400, 14800 ± 400, 16400 ± 400, 20800 ± 400, 22400 ± 400 and 22800 ± 400 plants · hm-2) of the retreated cultivated bamboo forest hydrological observations. The results showed that there was a very significant parabolic relationship between rainfall and penetration of rain and bamboo stems, and the parabola function of canopy interception with downward opening was observed. The average canopy interception rate range of 8 stands The average canopy interception rate was 1.42% -37.58%. The relationship between stand density and maximum interception and average canopy interception rate was parabolic function. When average density of canopy forest was 17,209 plant · hm-2, the average canopy interception rate reached 31.15 %, And the maximum canopy interception potential is 39.07 mm. It can be seen that a reasonable stand density can give full play to the ecological and hydrological benefits of returning bamboo forests to Reforestation.