红松人工林不同间伐强度对降雨再分配的影响

Effects of thinning intensity on rainfall redistribution in Pinus koraiensis plantation

为研究间伐对红松人工林水源涵养功能的影响程度,该文以本溪县草河口地区70 年生不同间伐强度(对照区、中度区、极强区)的红松人工林为研究对象,研究不同间伐强度对红松人工林树干径流、穿透雨及林冠截留的影响,结果表明:红松人工林的穿透雨、树干径流以及林冠截留都会随降雨强度增加而增加,穿透雨量随间伐强度增加而增加,不同间伐强度的穿透雨率差异显著(p<0.05),树干径流率差异不显著。林冠截留量随间伐强度增加而减小,且不同间伐强度的林冠截留率差异显著(p<0.05)。

In order to clarify the effect of thinning on water conservation function of Korean pine plantation, 70-year-old Korean pine plantations with different thinning intensity (control area, moderate area and extremely strong area) in Caohekou area of Benxi County were studied. The effect of different thinning intensities on trunk runoff, penetrating rain and canopy interception of Korean pine plantation was studied by using a self-recording rain gauge (modified by HOBO). The results showed that the penetrating rain, trunk runoff and canopy interception of Korean pine plantation increased with the increase of rainfall intensity, and the penetrating rain increased with the increase of thinning intensities, and the penetrating rain rate of different thinning intensities was different. There was no significant difference in trunk runoff rate (p<0.05). The canopy interception decreased with the increase of thinning intensity, and the canopy interception rate of different thinning intensity had significant difference (p<0.05). The results provide a theoretical basis for scientific management of plantation.