摘要
本文研究湖沼母质发育的青紫泥水稻土和第四纪红土母质上发育的黄筋泥水稻土的有机矿质复合体中有机磷的分布。结果表明:各组复合体中有机磷的含量(μg/g)是G_2>G_1>G_(?)C/P_0和N/P_0比例是G_2高于G_0和G_1,说明有机磷在复合体G_2中的富集低于有机碳和氮。复合体中可溶性有机磷化合物总量较全土高。可溶性有机磷化合物中,肌醇磷占有机磷12.1—32.3%,核酸磷占1.9—5.8%,磷酸磷占0.7—3.1%。复合体中肌醇磷、核酸磷和磷脂磷的含量(μg/g)G_2明显高于G_0和G_1。复合体中有机磷的活性分级为:活性磷占10%左右,中等活性磷占50%左右,中等稳定性磷和高度稳定性磷各占20%左右。G_0组的活性磷比例较全土高,但G_1和G_2组中则明显降低。不同土壤有机矿质复合体中活性磷和中等活性磷的分布,与有机磷化合物中的核酸磷和肌醇磷的含量有关。
This paper deals with the distribution of organic phosphorus compounds in organo-mineral complexes of periodically waterlogged paddy soils developed on red earth and paddy soils developed on lacustrine deposits with various fertility in Zhejiang province. The results are summarized as follows: 1. The organic phosphorus content in organo-mineral complexes were G_2>G_1>G_0. The C/P_(org.) and N/P_(org..) ratios of G_2 were higher than those of G_0 and G_1, which reveals that the organic phosphorus accumulated in G_2 of organo-mineral complex is less than organic carbon and nitrogen. 2. The total amount of organic phosphorus compounds extracted from organ-mineral complexes was higher than that in soil sample. For different compounds, inositol-P nucleic acid-P and phospholipid-P were 12.1—32.3%, 1.9—5.8% and 0.7—3.1% of total organic phosphorus respectively. The contents of inositol-P, nucleic acid-P and phospholipid-P in G_2 were higher than those in G_1 and G_0. 3. The labile organic phosphorus in organo-mineral complexes constitutes 5.0—15.9%, the moderately labiele 36.6—68.6%, the moderately resistant 13.0—26.0% and the highly resistant 10.0—29.3%. Although the percentage of labile pool in G_0 fraction was higher than soil sample, it dropped in G_1 and G_2. The results show that the distribution of labile and moderately labile pool in organo-mineral complexes of different soils is related to the contents of nucleic acid-P and inositol-P.
出处
《土壤学报》
CAS
CSCD
北大核心
1990年第3期286-292,共7页
Acta Pedologica Sinica
基金
国家自然科学基金
