甘肅涇川不同林齡人工刺槐林的土壤水分-物理特性及滲透性研究
發(fā)布時間：2018-07-31 08:00
【摘要】：【目的】通過對人工刺槐林的土壤水分-物理性質及滲透性進行分析,評估隴東黃土高原涇川縣中溝小流域人工刺槐林土壤水文功能,為該地區(qū)生態(tài)恢復工程建設和流域水土資源管理提供理論參考�！痉椒ā坎捎铆h(huán)刀法測定不同林齡(20、25、30和35 a)人工刺槐林的土壤水分-物理性質及滲透性�！窘Y果】在0~100 cm土層,不同生長階段刺槐林土壤容重(g/cm3)均值變化大小依次表現(xiàn)為:25 a(1.330)30 a(1.253)20 a(1.170)35 a(1.161);35 a生樣地土壤的飽和蓄水量、毛管蓄水量及最小蓄水量均最大,25 a生樣地的最小;4種林齡刺槐林土壤初滲速率的變化范圍為2.045~4.718 mm/min,35 a生刺槐林土壤初滲速率最大,且不同林齡間的變化規(guī)律與土壤非毛管孔隙度的變化規(guī)律基本一致。【結論】35 a生刺槐林的土壤持水能力與滲透性較好,20 a和30 a生次之,25 a生最差。
[Abstract]:[objective] to evaluate the soil hydrological function of artificial Robinia pseudoacacia forest in the middle gully watershed of Jinchuan County, Longdong Loess Plateau, by analyzing the soil moisture physical properties and permeability of artificial Robinia pseudoacacia forest. [methods] the soil moisture and physical properties and permeability of artificial Robinia pseudoacacia forest at different forest ages (20 ~ 2530 and 35 a) were determined by circular knife method. [results] the soil moisture and permeability of artificial Robinia pseudoacacia forest were measured in 0 ~ 100 cm soil layer. The mean value of soil bulk density (g/cm3) of Robinia pseudoacacia forest at different growth stages was: 1 25 a (1.330) 30 a (1.253) 20 a (1.170) 35 a (1.161) a soil saturated storage capacity. The variation range of soil initial osmotic rate of four forest age Robinia pseudoacacia forest was 2.045 ~ 4.718 mm / min ~ 35 mm 路min ~ (35). The variation of soil water holding capacity and permeability of 35 year old Robinia pseudoacacia forest was better than that of the other 25 years old, which was the lowest in 20 years and 30 years old, and the change law of different forest ages was basically the same as that of soil non-capillary porosity. [conclusion] the soil water holding capacity and permeability of 35 year old Robinia pseudoacacia forest were better.
【作者單位】： 甘肅農(nóng)業(yè)大學資源與環(huán)境學院;平?jīng)鍪兴帘３挚茖W研究所;涇川縣官山林場;
【基金】：國家自然科學基金地區(qū)項目(41461112) 甘肅省國際合作項目(1504WKCA006)
【分類號】：S714.2
[Abstract]:[objective] to evaluate the soil hydrological function of artificial Robinia pseudoacacia forest in the middle gully watershed of Jinchuan County, Longdong Loess Plateau, by analyzing the soil moisture physical properties and permeability of artificial Robinia pseudoacacia forest. [methods] the soil moisture and physical properties and permeability of artificial Robinia pseudoacacia forest at different forest ages (20 ~ 2530 and 35 a) were determined by circular knife method. [results] the soil moisture and permeability of artificial Robinia pseudoacacia forest were measured in 0 ~ 100 cm soil layer. The mean value of soil bulk density (g/cm3) of Robinia pseudoacacia forest at different growth stages was: 1 25 a (1.330) 30 a (1.253) 20 a (1.170) 35 a (1.161) a soil saturated storage capacity. The variation range of soil initial osmotic rate of four forest age Robinia pseudoacacia forest was 2.045 ~ 4.718 mm / min ~ 35 mm 路min ~ (35). The variation of soil water holding capacity and permeability of 35 year old Robinia pseudoacacia forest was better than that of the other 25 years old, which was the lowest in 20 years and 30 years old, and the change law of different forest ages was basically the same as that of soil non-capillary porosity. [conclusion] the soil water holding capacity and permeability of 35 year old Robinia pseudoacacia forest were better.
【作者單位】： 甘肅農(nóng)業(yè)大學資源與環(huán)境學院;平?jīng)鍪兴帘３挚茖W研究所;涇川縣官山林場;
【基金】：國家自然科學基金地區(qū)項目(41461112) 甘肅省國際合作項目(1504WKCA006)
【分類號】：S714.2
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