马尾松人工林郁闭度对大型土壤动物功能群的影响
发布时间：2018-08-12 18:00
【摘要】：将土壤动物分为捕食性、腐食性、杂食性、食木性和菌食性5个功能群,研究马尾松人工林各功能群大型土壤动物随郁闭度(0.5、0.6、0.7、0.8、0.9)的变化.结果表明:1)各郁闭度马尾松人工林大型土壤动物以腐食性个体比例最高,类群上以杂食性和食木性为主.2)马尾松人工林大型捕食性土壤动物个体数、类群数和食木性类群数在0.5~0.6郁闭度下无显著变化,在0.6~0.9郁闭度下显著降低.3)随郁闭度增大,枯落物层捕食性土壤动物个体和类群数显著减少,5~10 cm层腐食性土壤动物个体数呈不规则的波动变化.食木性土壤动物个体数随土层加深而增多,且在枯落层其类群数及5~10 cm层个体和类群数随郁闭度增大而显著减少.4)不同郁闭度下,除食木性土壤动物功能群Pielou均匀度无显著差异外,食木性和腐食性土壤动物各多样性指标均差异显著;捕食性土壤动物仅Simpson优势度指数在0.5~0.8郁闭度下无显著变化,在0.8~0.9郁闭度下显著降低.5)典范对应分析(CCA)显示,不同郁闭度马尾松人工林大型土壤动物功能群主要受土壤容重和含水量的影响.含水量对腐食性土壤动物个体数影响较大,食木性、捕食性土壤动物受土壤容重影响,捕食性土壤动物Simpson优势度指数受土壤pH和全磷影响.大型土壤动物功能群结构在0.7郁闭度下相对稳定,有利于马尾松人工林地力维持和生态功能的发挥.
[Abstract]:Soil animals were divided into five functional groups: predatory, scavenging, omnivorous, wood-eating and fungicidal. The changes of macrofauna with canopy density (0.50.60.70.70.8g) in Pinus massoniana plantation were studied. The results showed that the percentage of large soil fauna in Pinus massoniana plantation with different canopy density was the highest, and that in the group was mainly omnivorous and wood eating. 2) the individual number of large predatory soil animals in Pinus massoniana plantation was the highest. There was no significant change in group number and vegetative group number under 0.5 ~ 0.6 canopy density, but decreased significantly at 0.6 ~ 0.9 canopy density. The number of individuals and groups of predatory soil animals in litter layer decreased significantly, and the individual numbers of scavenging soil animals in 10 cm layer of litter layer fluctuated irregularly. The number of individuals of wood-eating soil animals increased with the deepening of soil layer, and at the litter layer, the number of groups and the number of individuals and groups in 5 ~ 10 cm layer decreased significantly with the increase of canopy density. Except for the Pielou evenness of wood-eating soil animal functional group, the diversity indexes of wood-eating and scavenging soil fauna were significantly different, and the predatory soil fauna had no significant change in Simpson dominance index under 0.50.8-canopy closure. Canonical correspondence analysis (CCA) showed that the large soil animal functional groups of Pinus massoniana plantation with different canopy density were mainly affected by soil bulk density and water content. Water content had a great influence on the individual number of scavenging soil animals, wood eating, predatory soil animals were affected by soil bulk density, and Simpson dominance index of predatory soil animals was affected by soil pH and total phosphorus. The structure of large soil fauna functional group is relatively stable at the density of 0.7 canopy, which is beneficial to the maintenance of soil fertility and the development of ecological function of Pinus massoniana plantation.
【作者单位】： 四川农业大学生态林业研究所/林业生态工程省级重点实验室;四川农业大学林学院;成都市农林科学院;
【基金】：国家自然科学基金项目(31370628)资助~~
【分类号】：S714.3
本文编号：2179855
[Abstract]:Soil animals were divided into five functional groups: predatory, scavenging, omnivorous, wood-eating and fungicidal. The changes of macrofauna with canopy density (0.50.60.70.70.8g) in Pinus massoniana plantation were studied. The results showed that the percentage of large soil fauna in Pinus massoniana plantation with different canopy density was the highest, and that in the group was mainly omnivorous and wood eating. 2) the individual number of large predatory soil animals in Pinus massoniana plantation was the highest. There was no significant change in group number and vegetative group number under 0.5 ~ 0.6 canopy density, but decreased significantly at 0.6 ~ 0.9 canopy density. The number of individuals and groups of predatory soil animals in litter layer decreased significantly, and the individual numbers of scavenging soil animals in 10 cm layer of litter layer fluctuated irregularly. The number of individuals of wood-eating soil animals increased with the deepening of soil layer, and at the litter layer, the number of groups and the number of individuals and groups in 5 ~ 10 cm layer decreased significantly with the increase of canopy density. Except for the Pielou evenness of wood-eating soil animal functional group, the diversity indexes of wood-eating and scavenging soil fauna were significantly different, and the predatory soil fauna had no significant change in Simpson dominance index under 0.50.8-canopy closure. Canonical correspondence analysis (CCA) showed that the large soil animal functional groups of Pinus massoniana plantation with different canopy density were mainly affected by soil bulk density and water content. Water content had a great influence on the individual number of scavenging soil animals, wood eating, predatory soil animals were affected by soil bulk density, and Simpson dominance index of predatory soil animals was affected by soil pH and total phosphorus. The structure of large soil fauna functional group is relatively stable at the density of 0.7 canopy, which is beneficial to the maintenance of soil fertility and the development of ecological function of Pinus massoniana plantation.
【作者单位】： 四川农业大学生态林业研究所/林业生态工程省级重点实验室;四川农业大学林学院;成都市农林科学院;
【基金】：国家自然科学基金项目(31370628)资助~~
【分类号】：S714.3
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