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通过对经不同途径形成的新鲜蚓粪和老化蚓粪进行35d的CO2呼吸动态测定,比较两种蚓粪有机碳呼吸的差异,从而加深对蚯蚓影响土壤有机碳库周转的理解。新鲜蚓粪由过1mm筛的潮土与红壤在不同植物残体施用下经蚯蚓(Metaphire guillelmi)48h作用形成,湿润老化的蚓粪也由上述两种土壤经同种蚯蚓30d培养生成。结果表明:新鲜蚓粪中有机碳的呼吸量均大于相应土壤中的,特别是施用玉米残体形成的蚓粪;老化蚓粪中,除红壤不施植物残体形成的老化蚓粪的呼吸量低于相应土壤外,其它老化蚓粪的呼吸量均大于相应土壤的。蚓粪的呼吸与土壤质地、有机碳含量、植物残体及蚓粪老化程度等有关。
Through the measurement of CO2 respiration of fresh vermicompost and vermicompost formed by different ways for 35 days, the difference of respiration of organic matter in the two kinds of earthworm manure was compared to deepen the understanding of earthworm affecting the turnover of soil organic carbon stock. The fresh vermicompost was formed by earthworm (Metaphire guillelmi) 48h after the 1mm sieve tidal soil and red soil were treated with different plant residues, and the wet aged vermicompost was also cultivated by the above two kinds of soil by the same earthworm for 30d. The results showed that the respiration of organic carbon in fresh vermicompost was greater than that in the corresponding soil, especially the vermicompost formed by corn residues. In the aged vermicompost, the respiration of vermicompost Below the corresponding soil, the respiration of other aged vermicomit harms is greater than that of the corresponding soil. Earthworm excrement respiration and soil texture, organic carbon content, plant debris and vermicompost aging degree and so on.