用猪粪水改良的退化土壤的水溶性有机物和生物活性
Water-soluble organic matter and biological activity of a degraded soil amended with pig slurry.
作者信息
Hernández Diana, Fernández José M, Plaza César, Polo Alfredo
机构信息
Centro de Ciencias Medioambientales, Consejo Superior de Investigaciones Científicas, Serrano 115 dpdo., 28006 Madrid, Spain.
出版信息
Sci Total Environ. 2007 May 25;378(1-2):101-3. doi: 10.1016/j.scitotenv.2007.01.020. Epub 2007 Feb 22.
The effects of pig slurry (PS) addition at rates of 30, 90 and 150 m(3) ha(-1) per year for five consecutive years on total organic C (TOC), water-soluble organic C (WSOC), soil microbial biomass C (MBC), basal respiration (BR) and dehydrogenase (DEH) and beta-glucosidase (GLU) activities of soil were investigated in a field experiment conducted under barley cultivation and semiarid conditions. Cumulative PS addition at 90 and 150 m(3) ha(-1) rates had a significant stimulating effect on MBC content and DEH and GLU activities. In contrast, no significant effect of PS amendment on TOC, WSOC and BR was detected. These results suggest that PS addition revitalizes soil microbial metabolism in transitory form because of the low stability of the added organic matter.
在大麦种植和半干旱条件下进行的田间试验中，研究了连续五年每年以30、90和150立方米/公顷的速率添加猪粪（PS）对土壤总有机碳（TOC）、水溶性有机碳（WSOC）、土壤微生物生物量碳（MBC）、基础呼吸（BR）、脱氢酶（DEH）和β-葡萄糖苷酶（GLU）活性的影响。以90和150立方米/公顷的速率累积添加PS对MBC含量、DEH和GLU活性有显著的刺激作用。相比之下，未检测到PS改良对TOC、WSOC和BR有显著影响。这些结果表明，由于添加的有机物质稳定性较低，添加PS以暂时的形式使土壤微生物代谢恢复活力。
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