| 冀北山地不同树种组成桦木林枯落物及土壤水文效应 |
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| 引用本文： | 温亚飞,杨新兵,钟良子.冀北山地不同树种组成桦木林枯落物及土壤水文效应[J].河北林果研究,2016(4):337-344. |
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| 作者姓名： | 温亚飞 杨新兵 钟良子 |
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| 作者单位： | 河北农业大学林学院,河北保定,071000 |
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| 基金项目： | 林业公益性行业科研专项“森林生态服务功能分布式定位观测与模型模拟”(201204101)，河北省林业科学技术研究项目“冀北山区森林生态系统健康评价技术研究”(1403451) |
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| 摘 要： | 为弄清不同树种组成的林分对林地枯落物及土壤持水能力的影响,采用浸泡法和双环法对冀北山地5种不同树种组成的桦木林进行研究,结果表明:1林地枯落物半分解层储量均大于未分解层,总储量变化范围为12.85~20.87t/hm~2,白桦纯林储量最大,阔叶混交林最小;2枯落物最大持水量变化范围为73.27~106.99t/hm~2,有效拦蓄量变化范围为59.22~81.86t/hm~2,均为杨桦混交林最大、落桦混交林最小;3枯落物持水量与浸泡时间呈对数关系,随时间推移逐渐增大,而吸水速率与浸泡时间呈指数关系,随浸泡时间推移而逐渐下降;4土壤容重是油松白桦林最大、杨桦混交林最小,总孔隙度是杨桦混交林最大(60.66%)、阔叶混交林次之(59.31%)、油松白桦林最小(45.43%),土壤最大持水量和有效持水量均是杨桦混交林最大、阔叶混交林次之、油松白桦林最小;5土壤入渗速率和入渗时间呈明显幂函数关系。综合来看,杨桦混交林和阔叶混交林枯落物和土壤持水能力较强。
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| 关 键 词： | 冀北山地 桦木林 枯落物 土壤 水文效应 |
Hydrological effects of different tree species composition of Betula platyphylla forests litters and soil in northern mountain of Hebei province |
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| Abstract: | The study aims to clarify the effect of forest stand with different tree species composition on the water holding capacity of forest litters and soil.This study adopted immersion method and loop method to research on the Betula platyphylla forest consisting of five different tree species in northern mountain of Hebei province.The results showed that:① the reserve of five forest types at the semi-decomposed litter layer was greater than that of the undecomposed layer;The total storage capacity of litters ranged from 12.85～20.87 t/hm2,and the biggest storage was Betula platyphylla forest,while the smallest storage was broadleaved mixed forest.②The maximum water-holding capacity of litters ranged from 73.27～106.99 t/hm2,and the effective storage ranged from 59.22～81.86 t/hm2,for both of which the mixed forest of Populus davidiana and Betula platyphylla reached the highest,while the mixed forest of Larix principis-rupperchtii and Butula platyphylla was the worst.③ Water holding capacity gradually increased with the extension of immersion time,which was a logarithmic function relation;while the water absorption rate gradually decreased with the extension of immersion time,which was a exponential relationship.vThe biggest average of soil bulk density was mixed Pinus tabulaeformis and Butula platyphylla,while the smallest was the mixed forest of Populus davidiana and Betula platyphylla.The total soil porosity was the highest in the mixed forest of Populus davidiana and Betula platyphylla (60.66 ％),which was followed by the broadleaved mixed forest(59.31 ％),and mixed Pinus tabulaeformis and Betula platyphylla (45.43 ％).The soil maximum water-holding capacity and effective water capacity also showed the same decreasing order:mixed Populus davidiana and Betula platyphylla,broadleaved mixed forest,and mixed Pinus tabulaeformis and Betula platyphylla.⑤ There was an obvious power function relationship between the soil infiltration rate and infiltration time.Taken together,the water-holding capacity of mixed Populus davidiana and Betula platyphylla and broadleaved mixed forest were better. |
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| Keywords: | north mountain of Hebei province species composition litters soil hydrological effect |
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