發(fā)布時(shí)間：2019-05-18 20:35

【摘要】：由生物質(zhì)熱裂解制成的富含碳元素的副產(chǎn)物生物質(zhì)炭,被提倡為豐富土壤碳庫的潛在戰(zhàn)略。本文收集了共50篇文獻(xiàn)、395組成對觀測數(shù)據(jù),并采用Meta分析的方法研究了生物質(zhì)炭的施用對土壤呼吸、土壤有機(jī)碳及微生物量碳的影響。研究結(jié)果表明,生物質(zhì)炭的施用對土壤CO2排放通量無顯著影響,但能顯著提高土壤有機(jī)碳和微生物生物量碳含量的40%和18%。對于土壤CO2排放通量的積極響應(yīng)只體現(xiàn)在田間試驗(yàn)、培養(yǎng)實(shí)驗(yàn)以及未被翻耕和種植的土壤中;而在有植株參與以及施加氮肥的土壤中施加生物質(zhì)炭時(shí)能明顯地增加土壤微生物量碳的含量;另外,對于不同土地利用類型的稻田而言,土壤有機(jī)碳含量的增加最為明顯。復(fù)合氮肥和堆肥的共同施用條件下,土壤CO2排放通量和土壤微生物量碳含量會(huì)急劇增加。土壤CO2的排放通量和土壤微生物量碳含量是隨著生物質(zhì)炭的施用量、熱裂解溫度以及C/N比的增加而遞減的;反之,土壤有機(jī)碳含量隨之遞增。對于不同生物質(zhì)炭的原料來源,糞便和作物秸稈對其影響最大。土壤CO2排放通量隨著生物質(zhì)炭的pH值的增加而遞減,當(dāng)pH值在8.1～9.0范圍之內(nèi)時(shí),土壤有機(jī)碳和土壤微生物量碳含量最高。因此,要評估生物質(zhì)炭的減緩氣候變化潛力,應(yīng)當(dāng)考慮土壤的理化性質(zhì)、土地利用類型、農(nóng)業(yè)操作規(guī)范以及生物質(zhì)炭的特性。
[Abstract]:Biomass carbon, a by-product rich in carbon, made from biomass pyrolysis, is advocated as a potential strategy to enrich soil carbon pool. In this paper, 50 literatures and 395 component pairs were collected, and the effects of biomass carbon application on soil respiration, soil organic carbon and microbial biomass carbon were studied by Meta analysis. The results showed that the application of biomass carbon had no significant effect on soil CO2 emission flux, but it could significantly increase the content of soil organic carbon and microbial biomass carbon by 40% and 18%. The positive response to soil CO2 emission flux was only reflected in field experiments, culture experiments and soils that had not been ploughed and planted. In addition, the content of soil microbial biomass carbon increased obviously when biomass carbon was applied in soils with plant participation and nitrogen fertilizer, and the increase of soil organic carbon content was the most obvious in different land use types of paddy fields. Under the condition of combined application of compound nitrogen fertilizer and compost, soil CO2 emission flux and soil microbial biomass carbon content increased sharply. The emission flux of soil CO2 and the content of soil microbial biomass carbon decreased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio, on the contrary, the content of soil organic carbon increased with the increase of biomass carbon application rate, pyrolysis temperature and C / N ratio. For the raw material sources of different biomass carbon, feces and crop straw have the greatest influence on it. Soil CO2 emission flux decreased with the increase of pH value of biomass carbon. When pH value was within 8.1 鈮，

本文編號：2480315