| 盖霞普,刘宏斌,翟丽梅,任天志,王洪媛.生物炭对中性水稻土养分和微生物群落结构影响的时间尺度变化研究[J].农业环境科学学报,2016,35(4):719-728. |
| 生物炭对中性水稻土养分和微生物群落结构影响的时间尺度变化研究 |
| Temporal fluctuations of impacts of corn-stover biochar on nutrients and microbial community structure in a neutral paddy soil |
| 投稿时间：2015-11-15 |
| DOI：10.11654/jaes.2016.04.016 |
| 中文关键词: 生物炭 土壤养分 微生物量 磷脂脂肪酸 中性水稻土 |
| 英文关键词: biochar soil nutrients microbial biomass phospholipid fatty acid neutral paddy soil |
| 基金项目:公益性行业(农业)科研专项经费项目(201303095);国家自然科学基金项目(41301311,41203072) |
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| 中文摘要: |
| 采用室内培养实验研究了生物炭对中性水稻土养分、微生物量和磷脂脂肪酸(PLFA)特征的影响。试验采用玉米秸秆生物炭(炭化温度500℃),分别按照炭土质量比0(CK)、1%(T1)、2%(T2)和4%(T3)施用于土壤中,进行好气培养。结果表明:从时间尺度变化规律来看,土壤中铵态氮和硝态氮以及微生物量碳氮呈现波动性变化规律,在培养第21 d达到最低值,随后又呈现增加趋势,这与土壤中可利用态碳氮养分消耗有关。从生物炭的添加效果来看,与CK相比,生物炭的添加能够提高土壤pH值、有机质、全氮含量,降低铵态氮、硝态氮含量;生物炭的添加能够提高土壤微生物量碳氮含量,与CK相比,T1~T3处理微生物量碳、氮含量分别提高5.5%~14.3%、4.8%~25.7%;生物炭的添加降低了土壤PLFA含量,但土壤中各微生物类群PLFA含量在处理间差异不明显,表明其对土壤微生物群落结构影响不显著。总之,施用生物炭在一定程度上可以改善中性水稻土养分状况,提高土壤微生物量含量,改善土壤肥力水平。 |
| 英文摘要: |
| A laboratory incubation study was conducted to examine the effects of biochar on soil nutrients, microbial biomass and phospholipids fatty acids(PLFA) in a neutral paddy soil. The biochar, pyrolyzed from corn-stover at 500℃, was applied to a neutral paddy soil at rates of 0(CK), 1%(T1), 2%(T2) and 4%(T3) of soil mass. Results showed that soil ammonium nitrogen, nitrate nitrogen, microbial biomass carbon and microbial biomass nitrogen fluctuated over time. These parameters reached the lowest levels on day 21st and then showed an increasing trend, which was attributed to the consumption of soil available nutrients. Additions of biochar increased pH values, organic matter, and total nitrogen in soil, but decreased soil ammonium nitrogen and nitrate nitrogen, as compared with CK. In addition, soil microbial biomass carbon and microbial biomass nitrogen were increased by 5.5%~14.3% and 4.8%~25.7% in T1~T3 treatments. Although PLFA content was slightly reduced by biochar amendments, the species of PLFA showed no significant difference among biochar treatments. The diversity of soil microbial community structure was not affected by the presence of corn-stover biochar. In conclusion, biochar amendments could improve soil nutrients, enhance soil microbial biomass, and promote soil fertility of the neutral paddy soil. |
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