楊樹人工林表層土壤水分及養(yǎng)分特征對(duì)森林撫育的響應(yīng)
本文選題:撫育強(qiáng)度 + 土壤滲透 ; 參考:《河南農(nóng)業(yè)大學(xué)學(xué)報(bào)》2017年02期
【摘要】:為了研究森林撫育經(jīng)營(yíng)活動(dòng)對(duì)人工林地表層土壤理化特性的影響,以鄭州市惠濟(jì)區(qū)黃河灘區(qū)楊樹人工中齡林為研究對(duì)象,森林撫育3 a后,設(shè)置了3個(gè)不同撫育強(qiáng)度處理水平,進(jìn)行了野外取樣和室內(nèi)試驗(yàn),研究了不同撫育強(qiáng)度對(duì)楊樹人工林表層土壤水分及養(yǎng)分特征的影響。結(jié)果表明,2個(gè)土層土壤飽和持水量、土壤非毛管孔隙度、土壤毛管孔隙度與土壤容重均隨撫育強(qiáng)度的增大而增加,大小關(guān)系為:中度弱度對(duì)照,其中對(duì)照0~10 cm層土壤容重顯著高于其它2個(gè)處理水平(P0.05);3個(gè)處理水平土壤0~10 cm層土壤初滲速率、土壤穩(wěn)定入滲速率、前36 min入滲量和前36 min平均入滲速率均顯著高于10~20 cm層(P0.05)。3個(gè)處理水平土層0~10 cm層土壤有機(jī)碳質(zhì)量分?jǐn)?shù)和土壤有機(jī)碳儲(chǔ)量均顯著高于10~20 cm層(P0.05),且均隨著撫育強(qiáng)度的增大而增加,其中中度撫育土壤有機(jī)碳質(zhì)量分?jǐn)?shù)和土壤有機(jī)碳儲(chǔ)量顯著高于對(duì)照和弱度撫育(P0.05)。土壤0~10 cm層和10~20 cm層全氮質(zhì)量分?jǐn)?shù)隨撫育間伐強(qiáng)度的增加而增大,到中度撫育時(shí)達(dá)到最大值,分別為0.998 g·kg~(-1)和0.597 g·kg~(-1)。因此,森林撫育對(duì)楊樹人工林林地土壤表層的影響效果更加明顯,顯著降低了土壤容重,增加了土壤毛管孔隙度和非毛管孔隙度,同時(shí)土壤有機(jī)碳含量和儲(chǔ)量均顯著提高。
[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.
【作者單位】: 河南農(nóng)業(yè)大學(xué)林學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(41201210) 河南省林業(yè)廳技術(shù)招標(biāo)項(xiàng)目 河南省高等學(xué)校青年骨干教師資助計(jì)劃(2014GGJS-036)
【分類號(hào)】:S714;S792.11
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