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Carbon storage in a wolfberry plantation chronosequence established on a secondary saline land in an arid irrigated area of Gansu Province, China


Carbon (C) storage has received significant attention for its relevance to agricultural security and climate change. Afforestation can increase C storage in terrestrial ecosystems, and has been recognized as an important measure to offset CO2 emissions. In order to analyze the C benefits of planting wolfberry (Lycium barbarum L.) on the secondary saline lands in arid areas, we conducted a case study on the dynamics of biomass carbon (BC) storage and soil organic carbon (SOC) storage in different-aged wolfberry plantations (4-, 7- and 11-year-old) established on a secondary saline land as well as on the influence of wolfberry plantations on C storage in the plant-soil system in an arid irrigated area (Jingtai County) of Gansu Province, China. The C sequestration and its potential in the wolfberry plantations of Gansu Province were also evaluated. An intact secondary saline land was selected as control. Results show that wolfberry planting could decrease soil salinity, and increase BC, SOC and litter C storage of the secondary saline land significantly, especially in the first 4 years after planting. The aboveground and belowground BC storage values in the intact secondary saline land (control) accounted for only 1.0% and 1.2% of those in the wolfberry plantations, respectively. Compared to the intact secondary saline land, the SOC storage values in the 4-, 7- and 11-year-old wolfberry plantations increased by 36.4%, 37.3% and 43.3%, respectively, and the SOC storage in the wolfberry plantations occupied more than 92% of the ecosystem C storage. The average BC and SOC sequestration rates of the wolfberry plantations for the age group of 0–11 years were 0.73 and 3.30 Mg C/(hm2?a), respectively. There were no significant differences in BC and SOC storage between the 7-year-old and 11-year-old wolfberry plantations, which may be due in part to the large amounts of C offtakes in new branches and fruits. In Gansu Province, the C storage in the wolfberry plantations has reached up to 3.574 Tg in 2013, and the C sequestration potential of the existing wolfberry plantations was 0.134 Tg C/a. These results indicate that wolfberry planting is an ideal agricultural model to restore the degraded saline lands and increase the C sequestration capacity of agricultural lands in arid areas.
Download Comment From cooperative journals:《Journal of Arid Land》 Hits:12639 Downloads:1400
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1 本文以甘肃省盐碱地为研究对象,通过研究盐碱地上枸杞种植年限不同,估算枸杞的种植在时间序列上对盐碱地土壤有机碳积累的影响。盐碱地是西北干旱地区的重要土地,但土壤盐碱化对作物的生长非常不利,本文给我们给出了一个很好的改善盐碱地土壤肥力的方式,种植耐旱的枸杞,不仅有经济价值,而且可以更好的改善盐碱地土壤的有机碳含量。 (Comment time:2018-10-19 09:23:11,From: ,0 )
Recommended references: MA Quanlin,WANG Yaolin,LI Yinke,SUN Tao,Eleanor MILNE.(2018).Carbon storage in a wolfberry plantation chronosequence established on a secondary saline land in an arid irrigated area of Gansu Province, China.Journal of Arid Land.[ChinaXiv:201802.00449] (Click&Copy)
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[V1] 2018-02-07 17:37:11 chinaXiv:201802.00449V1 Download
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