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

Author:

Kaur Ravinder,Singh Anurag,Dhaliwal S.S.

Abstract

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.

Publisher

Range Management Society of India

Subject

Agronomy and Crop Science,Food Science,Forestry

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3