沙漠苔藓生物结皮层物理特征研究
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摘要
[目的]研究适宜的方法测定苔藓结皮层物理性指标,并进一步评价其对生物结皮层物理性能的评价。[方法]在借鉴相关土壤物理特性指标测定方法的基础上,采用差减法、室内浸泡法、链条法分别测定了苔藓生物结皮层的容重、吸水速率、生物量及其持水特征和表面糙度等。[结果]苔藓生物结皮层容重为0.95 t/m~3,对照纯沙土为1.52 t/m~3;苔藓生物结皮层吸水2 min时其吸水速度为0.23 g/(g·min),吸水60 min时其吸水速度仅为0.01 g/(g·min);苔藓结皮层表面糙度为5.0,藻类结皮层表面糙度为11.2;苔藓生物结皮层生物体干重为689.69 g/m~2,植物体持水量为283.03%。[结论]该研究采用的相关测定方法不仅具有可操作性、简便等特点,而且测定结果能够客观反映沙漠苔藓生物结皮层特性指标,对指导生物结皮层物理性能研究具有参考意义。
[Objective] The research aimed to study the suitable method for determining the physical index of moss crust layer and further evaluate its evaluation of the physical properties of the biological crust layer.[Method]Based on the determination method of the soil physical property index,the weight loss method,soaking method and chain method were used to determine the bulk density,water absorption rate,biomass,water holding characteristics and surface roughness of the moss crusts.[Result] The bulk density of moss crusts was 0.95 t/m~3 and the control sandland was 1.52 t/m~3. The water absorption rate of the moss crusts was 0. 23 g/( g·min) during absorb water for 2 min and0.013 g/( g·min) during absorb water for 60 min. The mossycrusts surface roughness was 5.0,the surface roughness of the algae crusts was11.2. The dry weight of the moss organism was 689.69 g/m~2 and the water holding capacity of moss crusts was 283.03%.[Conclusion]The relevant determination method in this paper not only has operability and simple features,but also the results could be objectively reflected physical properties of moss crusts in desert,which it has reference function for study on biological crust physical properties.
[Objective] The research aimed to study the suitable method for determining the physical index of moss crust layer and further evaluate its evaluation of the physical properties of the biological crust layer.[Method]Based on the determination method of the soil physical property index,the weight loss method,soaking method and chain method were used to determine the bulk density,water absorption rate,biomass,water holding characteristics and surface roughness of the moss crusts.[Result] The bulk density of moss crusts was 0.95 t/m~3 and the control sandland was 1.52 t/m~3. The water absorption rate of the moss crusts was 0. 23 g/( g·min) during absorb water for 2 min and0.013 g/( g·min) during absorb water for 60 min. The mossycrusts surface roughness was 5.0,the surface roughness of the algae crusts was11.2. The dry weight of the moss organism was 689.69 g/m~2 and the water holding capacity of moss crusts was 283.03%.[Conclusion]The relevant determination method in this paper not only has operability and simple features,but also the results could be objectively reflected physical properties of moss crusts in desert,which it has reference function for study on biological crust physical properties.
引文
[1]闫德仁,薛英英,赵春光.沙漠生物结皮国内研究概况[J].内蒙古林业科技,2007,33(3):28-32.
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[4]段争虎,刘新民,屈建军.沙坡头地区土壤结皮形成机理的研究[J].干旱区研究,1996,13(2):31-36.
[5]郑云普,赵建成,张丙昌,等.新疆古尔班通古特沙漠生物结皮层藓类物种多样性及适应性研究[J].安徽农业科学,2009,37(1):316-319.
[6]ALI SALEH.用链条法测定地表糙度[J].水土保持科技情报,1995(1):14-15.
[7]闫德仁,薛英英,刘果厚.库布齐沙漠生物结皮层土壤理化特性的研究[J].土壤,2008,40(1):145-148.
[8]崔燕,吕贻忠,李保国.鄂尔多斯沙地土壤生物结皮的理化性质[J].土壤,2004,36(2):197-202.
[9]叶吉,郝占庆,于德永,等.苔藓植物生态功能的研究进展[J].应用生态学报,2004,15(10):1939-1942.
[10]陈兰周,刘永定,宋立荣.微鞘藻胞外多糖在沙漠土壤成土中的作用[J].水生生物学报,2002,26(2):157-159.
[11]郝占庆,叶吉,姜萍,等.长白山暗针叶林苔藓植物在养分循环中的作用[J].应用生态学报,2005,16(12):2263-2266.
[2]李守中,肖洪浪,李新荣,等.干旱半干旱地区微生物结皮土壤水文学的研究进展[J].中国沙漠,2005,24(4):191-195.
[3]杜晓晖.沙地地表结皮的研究[J].中国沙漠,1990,10(4):31-36.
[4]段争虎,刘新民,屈建军.沙坡头地区土壤结皮形成机理的研究[J].干旱区研究,1996,13(2):31-36.
[5]郑云普,赵建成,张丙昌,等.新疆古尔班通古特沙漠生物结皮层藓类物种多样性及适应性研究[J].安徽农业科学,2009,37(1):316-319.
[6]ALI SALEH.用链条法测定地表糙度[J].水土保持科技情报,1995(1):14-15.
[7]闫德仁,薛英英,刘果厚.库布齐沙漠生物结皮层土壤理化特性的研究[J].土壤,2008,40(1):145-148.
[8]崔燕,吕贻忠,李保国.鄂尔多斯沙地土壤生物结皮的理化性质[J].土壤,2004,36(2):197-202.
[9]叶吉,郝占庆,于德永,等.苔藓植物生态功能的研究进展[J].应用生态学报,2004,15(10):1939-1942.
[10]陈兰周,刘永定,宋立荣.微鞘藻胞外多糖在沙漠土壤成土中的作用[J].水生生物学报,2002,26(2):157-159.
[11]郝占庆,叶吉,姜萍,等.长白山暗针叶林苔藓植物在养分循环中的作用[J].应用生态学报,2005,16(12):2263-2266.