...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Response of soil compaction to the seasonal freezing-thawing process and the key controlling factors
【24h】

Response of soil compaction to the seasonal freezing-thawing process and the key controlling factors

机译：土壤压实对季节性冻融过程的反应及其关键控制因子

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 seasonal freezing-thawing process can alleviate saline farmland soil compaction, and improve soil aeration and soil water retention. However, the response of soil compaction to the seasonal freezing-thawing process and the key factors affecting soil compaction are still unclear. Therefore, in this study, we conducted a regional monitoring of soil compaction and other soil physical and chemical properties before and after the 2016-2017 seasonal freezing-thawing period in Yongji Irrigation Area, Hetao Irrigation District, North China. We used a combination of genetic algorithm-projection pursuit evaluation, grey relational analysis and stepwise regression to analyze the measured soil physical and chemical properties and their variations during the freezing-thawing period. Using this method combination, we obtained one projection value to represent the whole-profile soil compaction, and found the most important influencing soil physical and chemical properties-soil water content, groundwater level and total inorganic nitrogen. Ultimately, we developed a regression model to predict soil compaction given the values of the predictive variables (soil water content, groundwater level and total inorganic nitrogen) at the same depth and time. The importance of autumn irrigation and planting structure, as well as the spatial heterogeneity of field management regime on the relationship between freezing-thawing processes and soil compaction were highlighted. Our findings provide solid foundations for regional field management policies, especially irrigation and drainage policies. Future studies are recommended to focus on the effect of different irrigation regimes, different drainage regimes and different nitrogen fertilizer application regimes on the relationship between the seasonal freezing-thawing processes and saline farmland soil compaction.
机译：季节性冻融过程可以缓解盐水农田土壤压实，改善土壤曝气和土壤水保留。然而，土壤压实对季节性冷冻解冻过程的响应以及影响土壤压实的关键因素仍不清楚。因此，在这项研究中，我们在2016-2017季节冻结区，华北灌区，华北灌区，华北灌区，北方北京市北京市北京市北京市北京市北京市北京市北京市北京市北京市华为灌区的区域监测。我们使用了遗传算法投影追踪评价，灰色关系分析和逐步回归的组合，分析了在冻融期间测量的土壤物理和化学性质及其变化。使用这种方法组合，我们获得了一个投影值来表示整个轮廓的土壤压实，并发现最重要的影响土壤物理和化学性质 - 土壤含水量，地下水位和总无机氮。最终，我们开发了一种回归模型，以预测在相同深度和时间的预测变量（土壤水含量，地下水位和总无机氮）的值。突出了秋季灌溉和种植结构的重要性，以及现场管理制度的空间异质性，突出了冻融过程与土壤压实之间的关系。我们的调查结果为区域实地管理政策提供了坚实的基础，特别是灌溉和排水政策。建议将来的研究专注于不同的灌溉制度，不同的排水制度和不同的氮肥应用程序对季节性冻融过程和盐水农田土壤压实之间关系的影响。

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