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本文采用超声分散法研究东北主要耕作土壤复合体的组成及其性质。不同有机质含量的土壤中,<10微米的复合体变异较大,其在有机质含量高的黑土中较棕壤及苏打盐土高出一倍。各粒级复合体中C,N和P储量随粒级增大而降低。黑土、白浆土以游离态和紧结态腐殖质为主,棕壤和苏打盐土以联结态和紧结态为主。粘粒复合体与土壤中三、二氧化物的比值有肥地较大的趋势。试验结果表明土壤中有机无机的复合主要是在具有活性较高的粘粒级附近,与有机质紧密地结合。
In this paper, ultrasonic dispersion method was used to study the composition and properties of main tillage soil composites in Northeast China. Among the soils with different organic matter content, the complex with <10 μm had a large variation, which was double that of brown soil and sodic soil in black soil with high organic matter content. The contents of C, N and P in each grain size complex decreased with the grain size increasing. Black soil and albic soil are mainly free and tightly-bound humus, while brown soil and soda-salt soil are mainly linked and tightly bound. Cotyledon complex and the soil three, the ratio of dioxide fertilizer has a larger trend. The results show that the organic-inorganic composite in the soil is mainly in the vicinity of the clay with higher activity and closely combined with the organic matter.