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Long term impact of different tillage systems on carbon pools and stocks, soil bulk density, aggregation and nutrients: A field meta-analysis
Catena ( IF 5.4 ) Pub Date : 2020-12-25 , DOI: 10.1016/j.catena.2020.105102
Denis Topa , Irina Gabriela Cara , Gerard Jităreanu

Intensive tillage frequently has adverse impact on soil physical quality and soil organic carbon stocks in temperate regions. A consequence of this has been a reduction in crop production over the years demonstrating the necessity of effective and sustainable agriculture. This study aimed to evaluate soil organic carbon (SOC) storage and pools, soil bulk density, aggregation and nutrient availability under different tillage systems (no-tillage, chisel and conventional tillage), based on a long field experiment. After 10 years of crop rotation, in 0–30 cm soil depth, no-tillage system had higher total organic carbon over conventional tillage treatment. Plots under no-till and chisel treatments in 0–10 cm depth, had 7–13%, 34–35% and 9–15% higher non-labile fraction (Cfrac4), very-labile fraction (Cfrac1) and total organic carbon (TOC), respectively compared to that of conventional ones. Also, no-till system had higher passive carbon pool and carbon management index than conventional system. In addition, the conservative tillage, reduced soil bulk density compared with conventional tillage in the surface layer. The stability of slow-wetting and room storage aggregates from conservative tillage were significantly higher (p < 0.05) than conventional tillage. Overall, stability of soil aggregates is improved under conservative tillage. Tillage system, crop rotation and residues, increased soil available nutrients N, P and K in the 0–10 cm depth, with the highest values in no-tillage system. Therefore, conservation tillage could be recommended as a tillage practices that improve fertility soil characteristics and production sustainability.



中文翻译:

不同耕作制度对碳库和储量,土壤容重,聚集和养分的长期影响:现场荟萃分析

集约耕作经常对温带地区的土壤物理质量和土壤有机碳储量产生不利影响。其结果是多年来减少了农作物的产量,证明了有效和可持续农业的必要性。这项研究旨在通过长期的田间试验,评估不同耕作制度(免耕,凿子和传统耕作)下的土壤有机碳(SOC)存储量和储量,土壤容重,聚集和养分有效性。轮作10年后,在0–30 cm的土壤深度中,免耕系统的有机碳总量高于常规耕作。在免耕和凿子处理下,深度为0-10 cm的地块,非不稳定部分(C frac 4)分别提高了7-13%,34-35%和9-15%。,非常不稳定的分数(C frac 1和总有机碳(TOC)分别与传统的相比。而且,免耕系统比常规系统具有更高的被动碳库和碳管理指数。此外,与表层常规耕作相比,保守耕作降低了土壤容重。保守耕作的缓慢润湿和室内储存集料的稳定性显着高于传统耕作(p <0.05)。总体而言,保守耕作提高了土壤团聚体的稳定性。耕作制度,农作物轮作和残留物,在0-10厘米深度增加了土壤可利用的养分N,P和K,在免耕制度中最高。因此,建议将保护性耕作作为改善土壤肥力和生产可持续性的耕作方法。

更新日期:2020-12-25
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