杨树复合农林业系统时间顺序对活性库和抗性库土壤有机碳储量的影响

IF 0.8 4区农林科学 Q3 AGRONOMY

Range Management and Agroforestry Pub Date : 2023-06-25 DOI:10.59515/rma.2023.v44.i1.13

Ravinder Kaur, Anurag Singh, S.S. Dhaliwal

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引用次数: 0

摘要

该研究包括5种土地利用，即连续10、20和30年以杨树(Populus deltoides)为基础的农林复合系统(AFS)，饲料[珠粟(Pennisetum glaucum)/高粱(sorghum bicolor)]-饲料[燕麦(Avena sativa)/山茱萸(Trifolium alexandrinum)] (F-F)轮作和休耕地(对照)，以确定深度(0-15、15-30、30-60和60-90 cm)的总碳(TC)、土壤无机碳(SIC)、土壤有机碳(SOC)的变化。不同土地利用方式下总有机碳(TOC)及其组分。测定了极不稳定C (VLC)、不稳定C (LC)、不稳定C (LLC)和顽固性C (RC)组成的TOC池。休耕地表层土壤深度容重最高(1.53 Mg m-3)， 30年AFS表层土壤深度容重最低(1.42 Mg m-3)。TC, SOC和TOC股票依次为:AFS >f比;不同土壤深度的FL。地表深度10年周期的活性碳(AC)库(VLC + LC)占TOC的62.3%，高于30年周期的32.9%，30年周期的被动碳(PC)库(LLC + RC)占67.1%，高于10年周期的37.7%。LLC对PC的贡献在30年人工林周期(65%)高于10年人工林周期(48%)。因此，长期采用以杨树为基础的农林复合系统对土壤中抗性碳库的固存具有重要作用。

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Impact of chronosequence of poplar based agroforestry system on storage of soil organic carbon in active and recalcitrant pools

The study comprised of five land uses viz., sites having continuous poplar (Populus deltoides)-based agroforestry system (AFS) for 10, 20 and 30 years, fodder [pearlmillet (Pennisetum glaucum)/ sorghum (Sorghum bicolor)]-fodder [oats (Avena sativa)/ berseem (Trifolium alexandrinum)] (F-F) rotation and fallow land (control) to determine depthwise (0-15, 15-30, 30-60 and 60-90 cm) changes in total C (TC), soil inorganic C (SIC), soil organic C (SOC), total organic C (TOC) and its fractions in different land uses. The TOC pools consisting of very labile C (VLC), labile C (LC), less labile C (LLC) and recalcitrant C (RC) were determined. Fallow land had highest (1.53 Mg m-3) whereas 30 years AFS had lowest bulk density (1.42 Mg m-3) of the surface soil depth. The TC, SOC and TOC stocks followed the order: AFS > F-F > FL in various soil depths. The active carbon (AC) pools (VLC + LC) were higher in 10-year plantation cycle (62.3% of TOC) than 30-year cycle (32.9% of TOC), whereas the passive carbon (PC) pools (LLC + RC) were higher in 30-year plantation cycle (67.1%) than in 10 years (37.7%) in surface depth. The contribution of LLC to PC was higher in 30-year plantation cycle (65%) than in 10-year plantation cycle (48%). Therefore, long-term adoption of poplar based agroforestry system plays a significant role in sequestration of resistant carbon pools in the soils.

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来源期刊

Range Management and Agroforestry AGRONOMY-

CiteScore

1.50

自引率

62.50%

发文量

审稿时长

>12 weeks

期刊介绍： The Society has been established with the following objectives: 1. To advance the cause of research activity in all aspects of rangelands and to encourage and promote the studies on rangeland, wasteland ecosystems and agroforestry. 2. To provide facilities for seminars and conferences to rangeland researchers, development workers and farmers and to encourage close cooperation with organizations having related aims and interests. 3. To disseminate the knowledge of scientific agriculture and technology for forage and rangeland production, improvement and management.