Poplar Plantation as an Agroforestry Approach:Economic Benefits and Its Role in Carbon Sequestration in North India  

印度杨树林地的农林复合种植:经济利益及其在碳储存中的作用

作　　者：Rajeev JOSHI Bharat SHARMA Hukum SINGH Nabin DHAKAL Santosh AYER Tek MARASENI Rajeev JOSHI;Bharat SHARMA;Hukum SINGH;Nabin DHAKAL;Santosh AYER;Tek MARASENI(尼泊尔农林学院自然资源管理学院,尼泊尔乌代布尔56310;尼泊尔加德满都社区可持续发展倡议组织(SIFC),尼泊尔加德满都44600;印度森林研究所,印度德拉敦248006;南昆士兰大学生命科学与环境研究所,澳大利亚图文巴4350)

机构地区：[1]College of Natural Resource Management,Faculty of Forestry,Agriculture and Forestry University,Udayapur,Katari 56310,Nepal [2]Sustainable Initiatives for the Community(SIFC),Kathmandu 44600,Nepal [3]Forest Research Institute,PO New Forest,Dehradun 248006,India [4]Institute for Life Sciences and the Environment,University of Southern Queensland,Toowoomba,QLD 4350,Australia

出　　处：《Journal of Resources and Ecology》2024年第4期880-888,共9页资源与生态学报（英文版）

摘　　要：Poplar has gained popularity among farmers of Punjab,Haryana,Western Uttar Pradesh,and the foothills of Uttarakhand and Himachal Pradesh due to their fast growth rate and suitability for industrial uses such as pulp and timber production.Integrating poplar trees into agroforestry systems optimizes land resources and economic gains,as successful techniques have been developed to coordinate crop timing and arrangements effectively.Integrating poplar trees with agricultural crops provides additional income streams for farmers and contributes to soil conservation,biodiversity enhancement,and other environmental benefits.Farmers in these regions typically employ effective spacing of 5 m×4 m for block plantation and 1 m×3 m for row plantation.In the present study,a systematic literature review encompassing 137 English-language journal articles was conducted to assess the economic benefits of Poplar using discounted cash flow(DCF)analysis,considering short-rotation poplar(SRC)and very short-rotation poplar(vSRC)plantations alongside annual crops.The findings revealed that increasing canopy density led to a decline in crop yields by 37%,70%,and 99% at canopy densities of 30%,60%,and 90%,respectively,from early spring to harvest.Cost-benefit analysis in Saharanpur district,India,indicated average annual net returns of USD 346.36 for Poplar-based agrisilviculture,while monoculture yielded USD 140.73 per annum.Furthermore,economic analysis in Yamunanagar and Haridwar districts showed benefit-cost ratios ranging from 2.35 to 3.7.Additionally,Poplar block and boundary plantations were found to sequester significantly more carbon in long-lived biomass,serving as substitutes for fossil fuels(5.45 and 1.84 t ha-1 yr-1)in poplar-based systems with block and boundary plantations.The study suggested expanding spacing between tree rows may mitigate resource competition between plantations and crops.The study inferred that Poplar-based agroforestry may play a crucial role in climate mitigation programs by effectively sequestering a农林复合种植被认为是一种既有生产效益又有环境保护效益的可持续土地利用策略。在印度旁遮普等地区,种植杨树在农民中越来越受欢迎,这些农民发展了成功的基于杨树的农林复合种植技术,有效利用土地资源,并协调作物的种植时机和布局以提高经济收益。对于块状种植,有效的树间距为5 m×4 m,而排状种植将树木间隔安排在1-3 m之间。与其他树种相比,杨树被认为能够为农民带来更高的利润。本文在系统综述137篇英文期刊文章的基础上,通过比较短轮杨树(SRC)和非常短轮杨树(vSRC)种植,采用贴现现金流(DCF)分析,对比评估了不同种植方式的经济利益。杨树种植增加了遮蔽水平,从而导致作物产量下降,从早春到收获期,30%、60%和90%的遮蔽水平分别导致减产37%、70%和99%。扩大杨树的行间距可减轻资源竞争。在印度萨哈朗普普尔地区的成本效益分析表明,基于杨树的农林复合种植平均年净收益为346.36美元/年,而纯作物轮作仅为140.73美元/年。在亚穆那加尔和哈里杜瓦尔地区的经济分析显示,收益成本比介于2.35-3.70之间。杨树组成的块状和边界种植在长期生物量中贮存了大量碳,并作为化石燃料的替代品(块状和边界种植中,每公顷贮存碳量分别为5.45和1.84吨/年)。此外,它们通过提高土壤侵蚀等级、侵蚀比例和水稳团聚体,有助于控制土壤侵蚀。总之,农林复合种植系统通过有效贮存碳并为农民提供燃料、饲料、木材和木制品,在缓解对现有自然森林的压力方面发挥着关键作用。

关 键 词：AGROFORESTRY POPLAR economic viability carbon sequestration INDIA 

分 类 号：F335.1[经济管理—产业经济] X322[环境科学与工程—环境工程]