杨树人工林表层土壤水分及养分特征对森林抚育的响应

发布时间：2018-06-03 10:21

本文选题：抚育强度 + 土壤渗透　；参考：《河南农业大学学报》2017年02期

【摘要】：为了研究森林抚育经营活动对人工林地表层土壤理化特性的影响,以郑州市惠济区黄河滩区杨树人工中龄林为研究对象,森林抚育3 a后,设置了3个不同抚育强度处理水平,进行了野外取样和室内试验,研究了不同抚育强度对杨树人工林表层土壤水分及养分特征的影响。结果表明,2个土层土壤饱和持水量、土壤非毛管孔隙度、土壤毛管孔隙度与土壤容重均随抚育强度的增大而增加,大小关系为:中度弱度对照,其中对照0~10 cm层土壤容重显著高于其它2个处理水平(P0.05);3个处理水平土壤0~10 cm层土壤初渗速率、土壤稳定入渗速率、前36 min入渗量和前36 min平均入渗速率均显著高于10~20 cm层(P0.05)。3个处理水平土层0~10 cm层土壤有机碳质量分数和土壤有机碳储量均显著高于10~20 cm层(P0.05),且均随着抚育强度的增大而增加,其中中度抚育土壤有机碳质量分数和土壤有机碳储量显著高于对照和弱度抚育(P0.05)。土壤0~10 cm层和10~20 cm层全氮质量分数随抚育间伐强度的增加而增大,到中度抚育时达到最大值,分别为0.998 g·kg~(-1)和0.597 g·kg~(-1)。因此,森林抚育对杨树人工林林地土壤表层的影响效果更加明显,显著降低了土壤容重,增加了土壤毛管孔隙度和非毛管孔隙度,同时土壤有机碳含量和储量均显著提高。
[Abstract]:In order to study the effects of forest tending and management activities on the physical and chemical properties of surface soil of artificial forest, three different tending intensity treatments were set up after 3 years of forest tending, taking the artificial middle age forest of poplar in Huanghe beach area, Huiji District, Zhengzhou City as the research object. Field sampling and laboratory experiments were conducted to study the effects of different tending intensities on soil moisture and nutrient characteristics of poplar plantations. The results showed that the saturated soil water capacity, soil non-capillary porosity, soil capillary porosity and soil bulk density increased with the increase of tending strength. The soil bulk density of the control 0 ~ 10 cm layer was significantly higher than that of the other two treatments (P _ (0.05), and the initial infiltration rate and the stable infiltration rate of the three treatments were higher than those of the other two treatments. The average infiltration rate in the first 36 min and the average infiltration rate in the first 36 min were significantly higher than that in the 10 ~ (20) cm layer (P 0.05). The soil organic carbon content and the soil organic carbon storage in the 0 ~ (10) ~ (10) cm layer of the three treatments were significantly higher than that in the 10 ~ (20) cm layer (P _ (0.05), and both increased with the increase of the tending intensity. Soil organic carbon content and soil organic carbon storage in degree tending were significantly higher than those in control and weak degree tending (P 0.05). The content of total nitrogen in 0 ~ 10 cm and 10 ~ (20 cm) layers increased with the increase of thinning intensity, and reached the maximum of 0.998 g / kg ~ (-1) and 0.597 g / kg ~ (-1) respectively. Therefore, the effect of forest tending on soil surface layer of poplar plantation was more obvious, soil bulk density was significantly reduced, soil capillary porosity and non-capillary porosity were increased, and soil organic carbon content and reserves were significantly increased.
【作者单位】：河南农业大学林学院;
【基金】：国家自然科学基金项目(41201210) 河南省林业厅技术招标项目河南省高等学校青年骨干教师资助计划(2014GGJS-036)
【分类号】：S714;S792.11

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