Impact of landuse systems on soil organic carbon and its projection in northwestern India

IF 1.5 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Manju Shrama, Raj Setia, Madhuri Rishi, Bhupinder Pal Singh, Brijendra Pateriya
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Abstract

The evaluation of the impact of landuse on soil organic carbon (SOC) is required to understand the long-term productivity and possible sustainability of a landuse system. The effect of landuse on SOC was studied in the Shaheed Bhagat Singh Nagar district of Punjab (India). Surface (0–15 cm) and subsurface (15–30 cm) soil samples were collected under different land uses (cropland, forest, scrubland, and plantation) using stratified random sampling. Soil samples were analyzed for soil texture, bulk density, pH, electrical conductivity, organic carbon, Olsen P (available P), NH4OAc–extractable K (available K), and CaCl2 extractable S (available S) using standard methods. Ordinary kriging was used to study the distribution of soil properties in different land uses. Soil organic carbon under future climate was simulated using Rothamsted carbon (RothC) model with current landuse and management practices. Organic carbon in surface and subsurface soils was in the order: Forest > scrubland > plantation > cropland. The content of organic carbon, available P, K, and S decreased with increasing soil depth. The simulated SOC content in cropland soils under future climate may reduce, and in soils under forest, plantation and scrubland may increase by the year 2100. These results suggest that the landuse system is one of the major factors affecting SOC stocks. The study of organic carbon in different landuses could help the famers and policy makers to take measures for increasing SOC stocks to mitigate the climate change and also for sustainable agriculture.

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Abstract Image

印度西北部土地利用系统对土壤有机碳的影响及其预测
要了解土地利用系统的长期生产力和可能的可持续性,就必须评估土地利用对土壤有机碳(SOC)的影响。我们在印度旁遮普省的 Shaheed Bhagat Singh Nagar 地区研究了土地利用对土壤有机碳的影响。采用分层随机取样法收集了不同土地用途(耕地、森林、灌丛和种植园)下的表层(0-15 厘米)和次表层(15-30 厘米)土壤样本。土壤样本采用标准方法分析了土壤质地、容重、pH 值、导电率、有机碳、Olsen P(可利用 P)、NH4OAc-可提取 K(可利用 K)和 CaCl2-可提取 S(可利用 S)。采用普通克里格法研究了不同土地利用条件下的土壤特性分布。使用 Rothamsted 碳(RothC)模型模拟了未来气候下的土壤有机碳,并结合了当前的土地利用和管理实践。表层和地下土壤的有机碳含量依次为森林;灌丛地;种植园;耕地。有机碳、可利用磷、钾和硒的含量随着土壤深度的增加而减少。到 2100 年,在未来气候条件下,耕地土壤中的模拟 SOC 含量可能会减少,而森林、种植园和灌丛土壤中的 SOC 含量可能会增加。这些结果表明,土地利用系统是影响 SOC 储量的主要因素之一。对不同土地利用系统中有机碳含量的研究有助于农民和政策制定者采取措施增加有机碳储量,从而减缓气候变化,实现农业可持续发展。
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来源期刊
Clean-soil Air Water
Clean-soil Air Water 环境科学-海洋与淡水生物学
CiteScore
2.80
自引率
5.90%
发文量
88
审稿时长
3.6 months
期刊介绍: CLEAN covers all aspects of Sustainability and Environmental Safety. The journal focuses on organ/human--environment interactions giving interdisciplinary insights on a broad range of topics including air pollution, waste management, the water cycle, and environmental conservation. With a 2019 Journal Impact Factor of 1.603 (Journal Citation Reports (Clarivate Analytics, 2020), the journal publishes an attractive mixture of peer-reviewed scientific reviews, research papers, and short communications. Papers dealing with environmental sustainability issues from such fields as agriculture, biological sciences, energy, food sciences, geography, geology, meteorology, nutrition, soil and water sciences, etc., are welcome.
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