| 生物炭添加对半干旱地区土壤温室气体排放的影响 |
| 摘要点击 3187 全文点击 1566 投稿时间：2015-01-04 修订日期：2015-05-11 |
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| 中文关键词 半干旱区 生物炭 土壤呼吸 温室气体 定位研究 |
| 英文关键词 semi-arid region biochar soil respiration greenhouse gases positioning study |
| 作者 | 单位 | E-mail | | 郭艳亮 | 西北农林科技大学资源环境学院, 杨凌 712100 | yanliangguox@163.com | | 王丹丹 | 西北农林科技大学资源环境学院, 杨凌 712100 | | | 郑纪勇 | 西北农林科技大学资源环境学院, 杨凌 712100
中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100 | zhjy@ms.iswc.ac.cn | | 赵世伟 | 西北农林科技大学资源环境学院, 杨凌 712100
中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100 | | | 张兴昌 | 西北农林科技大学资源环境学院, 杨凌 712100
中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100 | |
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| 中文摘要 |
| 为确定生物炭添加对半干旱地区农田土壤温室气体释放的影响,采用小区定位试验,利用锯末(J)和槐树皮(H)及 3种添加比例(1%、3%、5%,质量百分比),研究了生物炭添加 6个月内表层土壤 CO2、CH4和 N2O等3种温室气体排放的动态变化. 结果表明,与对照相比,各处理土壤 CO2排放通量随生物炭的添加呈现增加的趋势,锯末和槐树皮等两种生物炭处理的土壤 CO2平均排放通量分别增加了 1.89%和 3.34%,但差异不显著. CH4排放随着生物炭添加量的增加而降低,各生物炭处理的土壤表层 CH4排放量平均降幅分别为: J1: 1.17%、J3: 2.55%、J5: 4.32%、H1: 2.35%、H3: 5.83%、H5: 7.32%. 其中,锯末生物炭仅在 5%添加量时较对照差异显著(P<0.05),而槐树皮生物炭处理在 3%和 5%的添加量与对照差异均达显著水平(P<0.05). 生物炭对 N2O的排放影响没有明显规律性. 研究表明,生物炭在短期内对半干旱地区农田土壤 CO2和 N2O的排放没有显著影响,而对 CH4排放则影响显著(P<0.05). 就生物炭类型而言,槐树皮生物炭在抑制 CH4排放方面优于锯末生物炭,差异显著(P=0.048). |
| 英文摘要 |
| This study aimed to investigate the effects of biochar addition on the emission of greenhouse gases from farmland soil in semi-arid region. Through an in-situ experiments, the influence of sawdust biochar(J) and locust tree skin biochar(H) at three doses (1%, 3%, and 5% of quality percentage) on CO2, CH4 and N2O emissions were studied within the six months in the south of Ningxia province. The results indicated that soil CO2 emission flux was slightly increased with the addition doses for both biochars, and the averaged CO2 emission flux for sawdust and locust tree skin biochar was enhanced by 1.89% and 3.34% compared to the control, but the difference between treatments was not statistically significant. The soil CH4 emission was decreased with the increasing of biochar doses, by 1.17%, 2.55%, 4.32% for J1, J3, J5 and 2.35%, 5.83%, 7.32% for H1, H3, H5, respectively. However, the difference was statistically significant only for J5, H3 and H5 treatments (P<0.05). Across addition doses, there was no apparent effect on soil N2O emission. Our study indicated that the biochar has no significant influence on soil CO2 and N2O emissions within six months in semi-arid region and can significantly influence soil CH4 emissions(P<0.05). As for biochar type, the locust tree skin biochar is significantly better than the sawdust biochar in terms of restraining CH4 emission(P=0.048). |
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