李陆平,廖超英,李晓明,孙长忠,段民富,杨晓娟.毛乌素沙地樟子松人工林土壤微生物数量变化[J].干旱地区农业研究,2013,31(1):157~160 |
毛乌素沙地樟子松人工林土壤微生物数量变化 |
Changes of soil microorganism of artificial Pinus sylvestris var.mongolica in Mu Us sandland |
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DOI:10.7606/j.issn.1000-7601.2013.01.29 |
中文关键词: 土壤微生物 樟子松固沙林 毛乌素沙地 榆林沙区 |
英文关键词:soil microorganism sand-fixing Pinus sylvestris var.
mongolica Mu Us sandland Yulin sandy area |
基金项目:国家自然科学基金项目(30670339) |
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中文摘要: |
对毛乌素沙地榆林沙区樟子松人工固沙林地土壤微生
物进行测定和分析,结果表明:不同林龄樟子松林地细菌、放线菌和真菌数量差异显著,细
菌和真菌数量随林龄增大不断增加;放线菌数量在流沙地(CK)、7~23 a生林地这一时期
内随着林龄增大显著增加,23 a生林地达到最大值,31 a生林地出现明显回落。三大微生
物均随土层深度加深而减少,在沙丘部位的分布表现为:丘间地>背风坡>迎风坡>丘顶。
在流沙地上栽植樟子松人工林后,土壤微生物数量增加,土壤肥力水平提高。 |
英文摘要: |
Soil microorganism of artificial
Pinus sylvestris var.
mongolica in Mu Us sandland were measured. The results showed that: soil
bacteria, soil actinomycetes and soil fungi of different plantation ages of art
ificial
Pinus sylvestris var.
mongolica were different, soil bacteria and
soi
l fungi increased as the plantation age went by; soil actinomycetes rose signifi
cantly during the CK, 7~23 year period, and it peaked at the 23rd year and drop
ped
apparently at the 31rd year. The three types of microorganism decreased as the s
oil depth deepened. and the distribution of them in different dune part
s presented as: interdune land>leeward slope>windward slope>dune tops. After
artificial
Pinus sylvestris var.
mongolica was established on the wind d
rift
sand, the number of soil microorganism rised, soil fertility level was increased. |
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