• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Horizons >Relationship of potentially labile soil organic carbon with soil quality indicators in deforested areas of Iran.
【24h】

Relationship of potentially labile soil organic carbon with soil quality indicators in deforested areas of Iran.

机译：伊朗森林砍伐地区潜在不稳定的土壤有机碳与土壤质量指标的关系。

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 purpose of this investigation was to study the effects of urbanization and land-use changes on vegetation and the concentration of carbon deposits in the Ziarat watershed, a tourism area, located in Golestan Province, in northern Iran. For this reason, we selected four land uses: forest, pasture, cultivated, and urban lands. Soil samples of from the 0- to 30-cm depth were taken from a factorial nest design within two geographical aspects (north and west), and with five replications for each geographical aspect. Converting forest to urban and cultivated land uses resulted in considerable losses of organic carbon (OC) and the destruction of aggregates, which caused the mean weight diameter (MWD) of aggregates to decrease from 2.54 mm to 0.35 and 1.2 mm, respectively. Compared to forest land, the labile carbon (LC) was lower in urban, cultivated, and pasture land by 87, 66, and 54%, respectively. Also nonlabile carbon was lower in urban, cultivated, and pasture land by 76, 49, and 34%, respectively. Soil microbial respiration (SMR) was lower in urban, cultivated, and pasture land (0.09, 0.14, and 0.22 mg CO2 g-1 d-1, respectively) compared with forest land (0.22 mg CO2 g-1 d-1). Statistically significant positive correlations (P<0.0001, with R=0.73) between stable carbon and MWD were observed. This study quantified reductions in numerous soil quality parameters resulting from extensive land-use changes and urbanization in Iran. Effective regional land-use planning in Iran can integrate results of this study to facilitate land development with the fewest deleterious impacts to soil quality.
机译：这项调查的目的是研究位于伊朗北部Golestan省的旅游区Ziarat流域的城市化和土地利用变化对植被和碳沉积物浓度的影响。因此，我们选择了四种土地用途：森林，牧场，耕地和城市土地。 0到30厘米深度的土壤样品是从两个地理方面（北部和西部）的阶乘巢式设计中获取的，每个地理方面都有五次重复。将森林转变为城市土地和耕地土地会导致有机碳（OC）的大量损失和集料的破坏，这导致集料的平均重量直径（MWD）分别从2.54 mm减少至0.35和1.2 mm。与林地相比，城市土地，耕地和牧场中的不稳定碳（LC）分别降低了87％，66％和54％。此外，城市，耕地和牧场的不稳定碳分别降低了76％，49％和34％。城市，耕地和牧场的土壤微生物呼吸（SMR）较低（0.09、0.14和0.22 mg CO 2 g -1 d -1 < / sup>）与林地（0.22 mg CO 2 g -1 d -1 ）进行比较。观察到稳定碳和MWD之间的统计显着正相关（P <0.0001，R = 0.73）。这项研究量化了由于伊朗土地用途的广泛变化和城市化而导致的许多土壤质量参数的降低。伊朗有效的区域土地利用规划可以整合本研究的结果，以促进土地开发，而对土壤质量的有害影响最小。

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