新成土活性与惰性碳的演替特征  

Succession Characteristics of Active and Inert Carbon of Newly Formed Soil

作　　者：郭振 

机构地区：[1]陕西省土地工程建设集团有限责任公司,陕西 西安 [2]陕西地建土地工程技术研究院有限责任公司,陕西 西安

出　　处：《农业科学》2021年第3期214-220,共7页Hans Journal of Agricultural Sciences

摘　　要：探析砒砂岩与沙复配土有机碳活性库和惰性库的演替特征及垂直分布规律,对新成土的肥力提升以及土体有机重构理论具有指导意义。试验选取砒砂岩与沙复配比分别为0:1 (CK)、1:5 (C1)、1:2 (C2)和1:1 (C3)的四个处理,种植年限分别为3年和10年。结果表明,仅复配比对重组有机碳含量有显著影响,以C3处理的重组有机碳含量最高。种植10年较3年,土壤易氧化有机碳含量和潜在可矿化有机碳含量呈现逐渐递增的变化趋势,年增加速率分别为0.05 g/kg和0.06 g/kg,0~10 cm土层显著高于其他土层(P 【0.05)。在种植3年的复配土中,潜在可矿化有机碳平均含量以C3处理最高,随着种植年限的增加,C1处理优势显著,较其他处理表现出明显差异。可见复配措施促进了0~10 cm土层活性碳库的积累,以1:1复配措施较优。Analyzing the succession characteristics and vertical distribution of organic carbon active pool and inert pool of arsenic and sand composite soil, which has guiding significance for the fertility improvement of newly formed soil and the theory of soil organic reconstruction, the experiment selected four treatments with the compound ratio of arsenic sandstone and sand of 0:1 (CK), 1:5 (C1), 1:2 (C2) and 1:1 (C3), and the planting period was 3 years and 10 years. The results showed that only the compound ratio had a significant effect on the recombinant organic carbon content, and the C3 treatment had the highest recombinant organic carbon content. Compared with 3 years of planting for 10 years, the content of easily oxidizable organic carbon and potential mineralized organic carbon in the soil showed a gradual increase trend, with an annual increase rate of 0.05 g/kg and 0.06 g/kg, respectively, and the 0~10 cm soil layer was significant higher than other soil layers (P

关 键 词：碳库 复配土 砒砂岩 风沙土 毛乌素 

分 类 号：G63[文化科学—教育学]