• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Research >Variation in soil microbial biomass in the dry tropics: impact of land-use change.
【24h】

Variation in soil microbial biomass in the dry tropics: impact of land-use change.

机译：干旱热带地区土壤微生物生物量的变化：土地利用变化的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The impact of land-use change on soil microbial biomass carbon (C) and nitrogen (N) was studied through two annual cycles involving natural forest, degraded forest, agroecosystem and Jatropha curcas plantation. Soil microbial biomass C and N, soil moisture content and soil temperature were analysed at upper (0-10 cm), middle (10-20 cm) and lower (20-30 cm) soil depths during the rainy, winter and summer seasons. The levels of microbial biomass C and N were highest in the natural forest, followed in decreasing order by Jatropha curcas plantation, degraded forest and the agroecosystem. The highest level of soil microbial biomass C and N was observed during summer, decreasing through winter to the minimum during the rainy season. Soil microbial biomass C and N decreased with increasing soil depth for all land-use types, and for all seasons. Seasonal variation in soil microbial biomass was better correlated with the soil moisture content than with soil temperature. The microbial biomass C/N ratio increased with the soil depth for all land-use types, indicating changes in the microbial community with soil depth. It is concluded that the change in land-use pattern, from natural forest to other ecosystems, results in a considerable decrease in soil microbial biomass C and N. Jatropha plantation may be an alternative for the restoration of degraded lands in the dry tropics.
机译：通过两个年度周期研究了土地利用变化对土壤微生物生物量碳（C）和氮（N）的影响，涉及天然林，退化森林，农业生态系统和麻疯树种植。在雨季，冬季和夏季，分别在较高（0-10厘米），中等（10-20厘米）和较低（20-30厘米）土壤深度分析土壤微生物生物量碳和氮，土壤水分含量和土壤温度。天然林中微生物生物量碳和氮的含量最高，其次为麻风树种植，退化森林和农业生态系统。夏季观测到土壤微生物生物量碳和氮的最高水平，整个冬季下降到雨季的最低水平。在所有土地利用类型和所有季节中，土壤微生物量碳和氮均随着土壤深度的增加而降低。土壤微生物生物量的季节变化与土壤水分的相关性比与土壤温度的相关性更好。所有土地利用类型的微生物量碳氮比随土壤深度的增加而增加，表明微生物群落随土壤深度的变化而变化。结论是，从天然林到其他生态系统的土地利用方式的变化导致土壤微生物生物量碳和氮的显着减少。麻风树种植可能是恢复热带干旱地区退化土地的另一种选择。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号