摘要
参照Terchenek和Oades的方法，对云南几种主要植烟红壤的有机无机复合体按颗粒大小进行分组研究。结果表明，植烟红壤有机无机复合体颗粒大小呈现以粉粒级为主的特征，土壤有机碳主要结合在粉粒级复合体中，不同粒径复合体量的差异与耕作施肥有关。在0-20cm耕作层，长期施化肥的土壤与长期有机无机肥配施的土壤相比，同种土壤单施化肥与增施有机肥相比，直径〈0．002mm粘粒复合体量有增高趋势，同时直径〉0．002mm复合体量降低。通过计算红壤直径〈0．002mm粘粒级复合体与直径0．01～0．25mm粗粉细砂粒级复合体的比值，称为复合体解离度，长期大量主施化肥土壤的复合体解离度高于有机无机肥配施的土壤；单施化肥处理土壤的复合体解离度高于化肥配施秸秆、有机土壤改良剂处理的土壤。
The method come from Terchenek and Odes was applied for study particle size fractionation of organic-mineral complexes in red soil planted flue-cured tobacco in Yunnan. The characteristic of organic-mineral complexes particle size in the red soils was mainly silt size separates. The organic carbon content was the highest in the silt separates. The difference and changes of the separate contents were in relation to cultivation and fertilization. Compare to the 0-20 cm layer of soils, the soil that main mineral fertilizers with which organic and mineral fertilizers applied in a long period, single mineral fertilization with adding organic matters in the same soil, the contents of 〈0.002 mm separates were increase, the contents of〉0.002 mm separates were decrease. The content ratio of 〈0.002 mm separates to 0.01 - 0.25 mm separate which called as fragmentation ratio was counted. The fragmentation ratio was increase in main mineral fertilization soils than that in applied organic and mineral fertilizers. It was also increase in single mineral fertilization treatment than that in adding organic matters.
出处
《西南农业学报》
CSCD
2006年第B09期188-195,共8页
Southwest China Journal of Agricultural Sciences
基金
云南省科技攻关计划项目（2002NG13）和中国烟草云南省公司重点项目（98C0052）部分研究内容.
关键词
有机无机复合体
颗粒大小分组
植烟红壤
施肥
organic-mineral complex
particle size fractionation
red soil planted flue-cured tobacco
fertilization
