果园红壤有机无机复合体性质的初步研究  

A PRELIMINARY STUDY ON THE CHARACTERISTICS OF ORGANO-MINERAL COMPLEXES OF RED SOILS IN ORANGE PLANTATIONS

作　　者：郭成达[1] 

机构地区：[1]福建师范大学地理系,350007

出　　处：《土壤学报》1993年第4期406-415,共10页Acta Pedologica Sinica

摘　　要：福建师范大学地理系350007 对果园红壤各级有机无机复合体的一些主要性质测定结果表明:<10μ各级复合体的碳氮含量明显地高于>10μ的各级复合体。随着复合体粒径的增大,C/N逐渐增大;松结合态腐殖质占该粒径腐殖质总量的百分率逐趋减少,紧结合态腐殖质的百分率逐趋增加,松结合态/紧结合态腐殖质逐趋下降;HA/FA逐渐增大、胡敏酸E_4/E_6从粘粒至粉砂粒和砂粒复合体逐趋减小、腐殖质氧化稳定性逐渐提高;游离态和无定形氧化铁含量逐渐减少;阳离子代换量逐渐下降。红壤垦植后因土壤的培肥条件、熟化程度和利用方式等不同,各复合体性质也发生相应的变化。增施有机肥有利促进各复合体,特别是粘粒复合体有机质的活化。Samples used in the experiment were collected from red soils with various fertility levels in the organge plantations of Jianyang and Chantai, Fujian. After the light fraction being removed from the soil, oscillation and ultrasonic dispersion were used to isolate the various organo-mineral complexes from heavy fraction in water. The main characteristics of various complexes are demonstrated as follows:1. Complexing degree of red soii in plantation was much higher, it can reach as high as 86—93%, but it had no relationship with the level of soil fertility. The quantity of the complexting which shows the fertility level had a positive correlation with the soil organic matter.2. In the same soil, the characteristics of various size complexes were different from each other, showing the change regularily to some extent with the increase of the particle-size.The contents of carbon and nitrogen in the various complex ,mallet than 10μ were higher than those larger than 10μ.With the increase of the complex size, the C/N ratio tended to become wider; the percentage of loosely combined humus in total the humus decreased gradually, and that of tightly combined humus had the tendency of increase, and the ratio of loosely combined humus/tightly combined humus decreased; HA/FA ratio of humus increased, E_4/E_6 ratio of humic acid increased from Clay to silt and sand, and oxidation stability of humus had the tendancy of increase; the contents of free and amorphous iron oxides and the cation exchange capacity decreased gradually.3. After cultivation, the characteristics of each complex in red soil varied with the fertility promotion condition, the degree of mellowing and the pattern of ultilization. Applying more organic manure could accelerate the activation of organic matter in various complexes, especially in the clay complex.

关 键 词：果园 红壤 有机复合体 无机复合体 

分 类 号：S155.25[农业科学—土壤学]