有机肥对紫色水稻土有机无机胶体复合度的影响

INFLUENCE OF ORGANIC MANURES ON ORGANOMINERAL GEL COMPLEXTION OF PURPLE PADDY SOIL

在长期施用有机肥的水旱轮作水稻土中,有机质和腐殖质有增加趋势,有机无机复合度提高。新形成的腐殖质易同铁铝结合,芳构化度低,结构简单,分子量小。>0.01mm水稳性微团聚体和>0.01mm水稳性有机微团聚体明显增加。

In purple paddy soil applied organic fertilizer over a long period of time with water—dry rotation, the contents of organic matter and humus, and the degree of organo—mineral gel complexation show its tendency to increase after 7 years of applying organic manures. The newly produced humus is easily comprexed with Fe. Al, showing singler structre, lower degree of aromatiza tion and lighter molecular weight. The contents of>0.01mm waterstabble microaggregate and. >0.01mm organo—microaggreate are significantly increased in comprison with those of the soils in the control (No fertilizer)and the single chemical fertilizer.