当前位置: X-MOL 学术Aeolian Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dry aggregate stability of soils influenced by crop rotation, soil amendment, and tillage in the Columbia Plateau
Aeolian Research ( IF 3.3 ) Pub Date : 2019-07-05 , DOI: 10.1016/j.aeolia.2019.07.001
Huawei Pi , David R. Huggins , Brenton Sharratt

Dry aggregate stability (DAS) is an important factor that influences soil erodibility. The purpose of this study was to measure DAS of soil, as well as assess the effect of crop rotation, soil amendment, and tillage on DAS in the main wind erosion area across the inland Pacific Northwest United States (iPNW). The stability of dry aggregates was measured using a commercial penetrometer and was found to be lower for soils in the iPNW than previously reported in other regions. Significant differences in DAS were found between tillage treatments at all locations. Dry aggregate stability was 24 to 114% higher for no-tillage summer fallow than tillage-based summer fallow treatments. Although not significant, DAS for a winter wheat-summer fallow (WW-SF) rotation was consistently higher than winter wheat-camelina-summer fallow (WW-C-SF) or winter wheat-safflower-summer fallow (WW-S-SF) rotations at two sites in central Washington. In contrast, when green manure or biosolids were applied as an amendment, there was no difference in DAS. Dry aggregate stability was more closely related to clay content than other soil properties (i.e. sand content and surface area of primary particles). Clay content, in the range 9 to 14%, can therefore be used to estimate DAS of soils in the iPNW. No-tillage management practices was beneficial to maintain greater DAS, thereby making soil aggregates more resistant to erosion and degradation.



中文翻译:

哥伦比亚高原的作物轮作,土壤改良和耕作对土壤干骨料稳定性的影响

干骨料的稳定性(DAS)是影响土壤易蚀性的重要因素。这项研究的目的是测量土壤的DAS,以及评估作物轮作,土壤改良剂和耕作对美国西北太平洋内陆(iPNW)主要风蚀区中DAS的影响。干骨料的稳定性使用商用渗透计进行测量,发现iPNW中的土壤比以前在其他地区报道的要低。在所有地点的耕作处理之间,DAS均存在显着差异。免耕夏季休耕的干骨料稳定性比耕作夏季休耕处理高24%至114%。虽然不重要,冬小麦-夏季休耕(WW-SF)的DAS始终高于冬小麦-山茶-夏季休耕(WW-C-SF)或冬小麦-红花-夏季休耕(WW-S-SF)的两个轮换华盛顿中部的站点。相反,当施用绿肥或生物固体作为修正物时,DAS没有差异。与其他土壤特性(即沙子含量和一次颗粒的表面积)相比,干骨料的稳定性与粘土含量的关系更为密切。因此,可以使用9%至14%的粘土含量来估算iPNW中土壤的DAS。免耕管理做法有利于维持更大的DAS,从而使土壤聚集体更耐侵蚀和降解。当施用绿肥或生物固体作为修正物时,DAS没有差异。与其他土壤特性(即沙子含量和一次颗粒的表面积)相比,干骨料的稳定性与粘土含量的关系更为密切。因此,可以使用9%至14%的粘土含量来估算iPNW中土壤的DAS。免耕管理做法有利于维持更大的DAS,从而使土壤聚集体更耐侵蚀和降解。当施用绿肥或生物固体作为修正物时,DAS没有差异。与其他土壤特性(即沙子含量和一次颗粒的表面积)相比,干骨料的稳定性与粘土含量的关系更为密切。因此,可以使用9%至14%的粘土含量来估算iPNW中土壤的DAS。免耕管理做法有利于维持更大的DAS,从而使土壤聚集体更耐侵蚀和降解。

更新日期:2019-07-05
down
wechat
bug