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采用国家标准森林分析方法进行了沙棘与油松、侧柏人工混交林的水文影响研究,结果表明:混交林内年均降水量较林外减少了20.1%;林内月降水量的季节变化以夏、秋、春、冬依次递减;年均气温比纯林内低0.1℃,相对湿度高4.5%;乔木层年均截留量较纯林提高了56.6%,灌木层提高了395.7%;年均地表径流量105.8 L,径流摸数为10.58 m3.km-2.a-1,纯林分别为1 349.05 L和134.9 m3.km-2.a-1,土壤侵蚀模数为0.65 t.hm-2.a-1,纯林为9.2 t.hm-2.a-1;枯枝落叶层现存量增加了200%;平均容水量为自身质量的3.1倍;土壤密度和土粒密度分别减少了6.3%和17.7%,含水量、孔隙度和通气度分别提高了6.1%、13.9%、20.3%。不同土层土壤密度和土粒密度由上到下逐渐增大,孔隙度和通气度表层较高,向下逐渐减少;底层、中层和表层土壤非毛管孔隙度分别提高了113.3%、38.6%和32.6%;最大持水量、最小持水量、毛管持水量分别较纯林平均高11.0%、9.8%、10.5%,较荒地高36.0%、16.0%、25.6%;储水量和0~40 cm储水量分别较纯林和荒地提高了12.4%、22.7%,排水能力也较强。
The national standard forest analysis method was used to study the hydrological effects of seabuckthorn mixed with Pinus tabulaeformis and Platycladus orientalis. The results showed that the annual average precipitation in the mixed forest decreased by 20.1% compared with the forest. The seasonal variation of monthly precipitation in the forest, Autumn, spring and winter in descending order. The average annual temperature was 0.1 ℃ lower than pure forest and 4.5% higher relative humidity. The annual average interception of arbor layer was 56.6% and shrub layer increased by 395.7% 105.8 L and the runoff number was 10.58 m3.km-2.a-1. The pure forests were 1 349.05 L and 134.9 m3.km-2.a-1 respectively, and the soil erosion modulus was 0.65 t.hm-2.a -1, the pure forest was 9.2 t.hm-2.a-1; the existing amount of litter layer increased by 200%; the average water content was 3.1 times of its own; the soil density and soil particle density decreased by 6.3% and 17.7%, water content, porosity and air permeability increased by 6.1%, 13.9% and 20.3% respectively. The soil density and soil particle density of different soil layers increased from top to bottom, porosity and air permeability were higher and decreased downwardly; the non-capillary porosity of bottom, middle and topsoil increased by 113.3% and 38.6%, respectively 32.6%, respectively. The maximum water holding capacity, the minimum water holding capacity and the capillary holding capacity were 11.0%, 9.8% and 10.5% higher than the pure stands respectively, 36.0%, 16.0% and 25.6% Respectively, increased by 12.4%, 22.7% than the pure forests and wasteland, drainage capacity is also stronger.