帽峰山地区典型小流域主要森林类型土壤渗透性
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摘要
采集帽峰山地区典型小流域主要林地类型(青冈林、毛竹林、凤尾竹林、桉树林)原状土样进行土壤剖面(0~20 cm、20~40 cm、40~60 cm)渗透系数及其相关因子的实验研究,结果表明:各种林地类型土壤渗透系数在剖面上均表现出从上到下递减的特点,毛竹、青冈、凤尾竹、桉树林的土壤剖面渗透系数变化范围分别为13.64~4.91、10.49~3.63、8.16~2.96、7.92~3.71 m/d。由于20~40 cm、40~60 cm土层渗透系数差异性相对较小,土壤渗透性剖面可简化为上、下两个亚层,上部亚层渗透系数是下部亚层的1.89~2.42倍。各种林地类型土壤渗透系数与孔隙度、根密度呈正相关,与干容重呈负相关,与根径关系相关性方向具有不确定性。不同林地类型土壤渗透系数与干容重、根密度、根径之间的相关程度存在较大差异,但均表现出与孔隙度之间存在良好相关性。
The hydraulic conductivity and correlated factors of undisturbed soil profile( 0 ~ 20 cm、20 ~ 40 cm、40 ~ 60 cm)are researched,by taking different forest types( cyclobalanopsis chungii,phyllostachys pubescens,bambusa multiplex var. nana,eucalyptus forests) in typical small watershed of Moufengshan area in Guangzhou of China as study objects. In conclusion,generally,the hydraulic conductivity is decreasing with an increase in profile depth. The variation ranges of hydraulic conductivity are13. 64 ~ 4. 91,10. 4 ~ 3. 63,8. 16 ~ 2. 96,and 7. 92 ~ 3. 71 m / d for phyllostachys pubescens,cyclobalanopsis chungii,bambusa multiplex var. nana,and eucalyptus forests respectively. The soil profiles are classified into upper and lower sub- layers after a combination of 20 ~ 40 cm and 40 ~ 60 cm layers due to small difference found in hydraulic conductivity. The result demonstrates that the coefficient of upper layer is 1. 89 ~ 2. 42 times of the lower layer. In general,coefficients of permeability are found to be positively related to porosity and root density,and negatively related to dry density,whilst the correlation with root diameter remains uncertain. However,the degrees of correlation with dry density,root density,and root diameter vary substantially for different types of forest land,whereas an overall well correlation with porosity is presented.
The hydraulic conductivity and correlated factors of undisturbed soil profile( 0 ~ 20 cm、20 ~ 40 cm、40 ~ 60 cm)are researched,by taking different forest types( cyclobalanopsis chungii,phyllostachys pubescens,bambusa multiplex var. nana,eucalyptus forests) in typical small watershed of Moufengshan area in Guangzhou of China as study objects. In conclusion,generally,the hydraulic conductivity is decreasing with an increase in profile depth. The variation ranges of hydraulic conductivity are13. 64 ~ 4. 91,10. 4 ~ 3. 63,8. 16 ~ 2. 96,and 7. 92 ~ 3. 71 m / d for phyllostachys pubescens,cyclobalanopsis chungii,bambusa multiplex var. nana,and eucalyptus forests respectively. The soil profiles are classified into upper and lower sub- layers after a combination of 20 ~ 40 cm and 40 ~ 60 cm layers due to small difference found in hydraulic conductivity. The result demonstrates that the coefficient of upper layer is 1. 89 ~ 2. 42 times of the lower layer. In general,coefficients of permeability are found to be positively related to porosity and root density,and negatively related to dry density,whilst the correlation with root diameter remains uncertain. However,the degrees of correlation with dry density,root density,and root diameter vary substantially for different types of forest land,whereas an overall well correlation with porosity is presented.
引文
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[11]漆良华,张旭东,周金星,等.湘西北小流域典型植被恢复群落土壤贮水量与入渗特性[J].林业科学.2007,43(3):17-22.
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[13]李建兴,何丙辉,梅雪梅,等.紫色土区坡耕地不同种植模式对土壤渗透性的影响[J].应用生态学报.2013,24(3):725-731.
[2]马维伟,王辉,张莉萍.兰州北山人工侧柏林地土壤渗透性研究[J].干旱区资源与环境.2009,23(2):186-190.
[3]赵洋毅,王玉杰,王云琦,等.渝北水源区水源涵养林构建模式对土壤渗透性的影响[J].生态学报.2010,30(15):4162-4172.
[4]解文艳,樊贵盛.土壤质地对土壤入渗能力的影响[J].原理工大学学报.2004,35(5):537-540.
[5]魏强,凌雷,张广忠,等.甘肃兴隆山主要森林类型土壤渗透性[J].东北林业大学学报.2013,41(3):57-62.
[6]刘道平,陈三雄,张金池,等.浙江安吉主要林地类型土壤渗透性[J].应用生态学报.2007,18(3):493-498.
[7]霍小鹏,李贤伟,张健,等.川西亚高山暗针叶林土壤渗透性能研究[J].水土保持研究.2009,16(3):192-195.
[8]黄俊彪.广州市典型森林土壤多环芳烃分布及其吸附性能研究.中国林业科学研究院.硕士论文.2013.
[9]Zhang Jianxin,Zheng Dawei.Rain water harvesting approaches and their effects on increasing soil water content and crop yield in north China[J].Transactions of the CSAE,2006,22(7):65-69.
[10]余新晓,程根伟.长江上游亚高山暗针叶林土壤水分入渗特征研究[J].应用生态学报.2003(1):15-19.
[11]漆良华,张旭东,周金星,等.湘西北小流域典型植被恢复群落土壤贮水量与入渗特性[J].林业科学.2007,43(3):17-22.
[12]刘广路,范少辉,漆良华,等.不同类型毛竹林土壤渗透性研究[J].水土保持学报.2008,22(6):44-47.
[13]李建兴,何丙辉,梅雪梅,等.紫色土区坡耕地不同种植模式对土壤渗透性的影响[J].应用生态学报.2013,24(3):725-731.