經(jīng)濟(jì)林草措施改造柏木低效林對中小型土壤動物群落結(jié)構(gòu)的影響
[Abstract]:The spatial distribution and community diversity of small and medium-sized soil animals are of great significance to evaluate the ecological restoration of inefficient forests. In order to explore the effect of forest and grass measures on the structure of small and medium-sized soil fauna community in low efficient forest of cypress, the experiment was conducted with the control group of walnut, walnut Sudan grass, walnut ryegrass, walnut pine soil and cypress. Dry and wet funnel methods were used to investigate the distribution of small and medium-sized soil fauna communities under different treatments. The results showed that the number, density and diversity of small and medium-sized soil fauna communities were relatively high in summer and autumn, but relatively low in winter and spring. In the early stage of treatment, the forest and grass measures were almost at the middle dissimilar level with the soil fauna community of the low-efficient forest of cypress, and with the extension of the treatment time, their communities were basically at the middle similar level, among which, the walnut soil and the cypress forest were in autumn. The middle and small soil fauna of walnut grass and cypress forest are mainly distributed in the upper and middle soil no matter which season, and the soil animals have the tendency to migrate to the middle and lower soil in winter. The small and medium-sized soil fauna of walnut pine soil mainly distributed in the upper and middle layers in the early stage of treatment. With the extension of the treatment time, the soil animals would gradually migrate to the middle and lower layers. The effects of forest and grass measures on the community structure of small and medium-sized soil animals were significant, and the effects of different forest and grass measures were slightly different, among which, the effects of walnut Sudan grass, walnut ryegrass and walnut ryegrass were better.
【作者單位】: 四川農(nóng)業(yè)大學(xué);
【基金】:國家科技支撐計劃項目(2011BAC09B05) 四川省水土保持與荒漠化防治重點實驗室項目資助
【分類號】:S714.3
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