Enhanced Soil Carbon Storage under Agroforestry and Afforestation in Subtropical China

Forests

Guibin Wang²  Clive Welham³  Chaonian Feng²  Lei Chen²  Fuliang Cao²  P. K. Ramachandran Nair¹ 

[1] Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;;Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; E-Mails:;Department of Forest Resources Management, University of British Columbia, Vancouver, BC V6T 1Z4, Canada

关键词: Ginkgo biloba;    agroecosystem;    agroforestry;    afforestation;    soil carbon;    organic carbon;    inorganic carbon;    carbon fraction;   

DOI  :  10.3390/f6072307

来源: mdpi

【 摘 要 】

Soil carbon (C) in three Ginkgo (Ginkgo biloba L.) agroforestry systems, afforestation (Ginkgo alone; G), and an agricultural cropping system were compared over a five-year period. The agroforestry systems were Ginkgo + Wheat (Triticum aestivum L.) + Peanut (Arachis hypogaea L.; GWP); Ginkgo + Mulberry (Morus alba L.; GM); and Ginkgo + Rapa (Brassica napus L.) + Peanut (GRP). The agricultural system consisted of wheat and peanut (WP). Total soil carbon (TSC), soil organic (SOC) and inorganic carbon (SIC), and the pools of five SOC chemical fractions were measured. TSC and SOC were always lower under WP than the G-based planting systems, and TSC in the latter increased significantly across years in the top 20 cm. Stocks of SIC under WP were significantly greater than the G-based systems, whereas SOC fractions tended to be lower. Most fractions increased across years but not in WP.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.