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Tytuł:
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Impact of 28 year old agroforestry systems on soil carbon dynamics in Eastern Himalayas.
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Autorzy:
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Yadav GS; ICAR Research Complex for North Eastern Hill Region, Tripura Centre, Tripura, 799 210, India; Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India.
Kandpal BK; ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, 793 103, India.
Das A; ICAR Research Complex for North Eastern Hill Region, Tripura Centre, Tripura, 799 210, India.
Babu S; ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, 793 103, India; Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India. Electronic address: .
Mohapatra KP; ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, 793 103, India; ICAR- National Bureau of Plant Gentic Resources, New Delhi, 110 012, India.
Devi AG; ICAR Research Complex for North Eastern Hill Region, Tripura Centre, Tripura, 799 210, India.
Devi HL; ICAR Research Complex for North Eastern Hill Region, Tripura Centre, Tripura, 799 210, India.
Chandra P; ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, 793 103, India; ICAR- National Bureau of Plant Gentic Resources, New Delhi, 110 012, India.
Singh R; ICAR Research Complex for North Eastern Hill Region, Tadong, Gangtok, 737 102, India; ICAR- Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, 208 017, India.
Barman KK; ICAR Research Complex for North Eastern Hill Region, Tripura Centre, Tripura, 799 210, India; ICAR-Directorate of Weed Research, Jabalpur, Madhya Pradesh, 482 002, India.
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Źródło:
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Journal of environmental management [J Environ Manage] 2021 Apr 01; Vol. 283, pp. 111978. Date of Electronic Publication: 2021 Jan 19.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: London ; New York, Academic Press.
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MeSH Terms:
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Carbon*/analysis
Soil*
Agriculture ; Carbon Sequestration ; India
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Contributed Indexing:
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Keywords: Agroforestry; Land restoration; Multipurpose trees; Pineapple; Soil carbon pool
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Substance Nomenclature:
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0 (Soil)
7440-44-0 (Carbon)
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Entry Date(s):
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Date Created: 20210121 Date Completed: 20210223 Latest Revision: 20210223
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Update Code:
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20240105
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DOI:
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10.1016/j.jenvman.2021.111978
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PMID:
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33477098
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Globally, various estimates are available on the above-ground (plant parts) carbon (C) sequestering potential of agroforestry systems (AFSs). However, information on soil organic carbon (SOC) sequestration potential is limited for AFSs. Furthermore, the impacts of AFSs established for the restoration of C in degraded soils (prone to soil erosion, C and nutrients loss, etc.) of Himalayas are rarely investigated. Thus, a study was conducted on an agroforestry block established in 1989 at the Indian Council of Agricultural Research (ICAR), Research Complex for North Eastern Hill (NEH) Region, Lembucherra, Tripura, India. The AFSs comprised of four multipurpose tree species viz., teak (Tectona grandis Linn), sissoo (Dalbergia sissoo Roxb. Ex DC.), eucalyptus (Eucalyptus globulus L.), and neem (Azadirachta indica A. Juss) in combination with pineapple (Ananas comosus L. merr.). Planted in three times replicated randomized block design. After 28 years of establishment, the impacts of these AFSs were assessed on SOC stocks and its fraction pools. Results revealed that sissoo + pineapple system stored the highest SOC stocks in 0-15 cm (22.1 ± 1.4 Mg/ha) and 30-60 cm (18.0 ± 4.3 Mg/ha) depths, whereas the SOC stocks in 15-30 cm (12.2 ± 1.2 Mg/ha) and 0-30 cm (34.0 ± 1.6 Mg/ha) were the highest under teak + pineapple. When considering the entire 0-100 cm soil profile, the SOC stocks ranged between 65.3 and 71.6 Mg/ha across the diverse AFSs which was significantly higher than that under cultivated land (52.8 ± 2.6 Mg/ha). The sissoo + pineapple system had the highest SOC stock in 0-100 cm (71.6 ± 5.8 Mg/ha). The share of passive carbon (PC, less labile + non-labile) pools to SOC stocks under AFSs followed the order of sissoo + pineapple > teak + pineapple > neem + pineapple > eucalyptus + pineapple. The PC or recalcitrant pools of SOC stocks at 0-100 cm were 54.2-60.6% under various AFSs. Results revealed that the establishment of AFSs with pineapple on degraded lands increased a significant amount of C and had a considerable effect on soil quality in comparison to C present in soils under cropland. Thus, a large scale adoption of AFSs may restore C lost through the cultivation of the crop in degraded lands and provide a feasible option for livelihood through concurrent cultivation of multipurpose tree species and agri-horticulture crops.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
