红壤性水稻土是我国重要的农业土壤，面积占全国水田面积的利％左右[1]；分布在热带和亚热带，水热资源丰富，适宜于发展油莱一双季稻三熟制[2]．但据估计，目前南方红壤区2／3的稻田在冬季末加利用[2]，因此，研究油菜对红壤性水稻土的生物培肥作用，实行用地养地相结合，开发 Red soil paddy soil is an important agricultural soil in China, accounting for about 1% of the paddy field area in China [1]. It is distributed in tropical and subtropical regions with rich water and heat resources and is suitable for developing a double crop of rice. However, it is estimated that about two-thirds of the paddy fields in the southern red soil area are now being used at the end of winter [2]. Therefore, to study the effect of rape on the bio-fertilization of reddish paddy soils,