第四纪红壤不同熟化措施下的阴离子态养分含量及其剖面分布

本文对第四纪红壤及其发育的土壤中的６种必需阴离子态养分含量及其在土壤剖面中的分布进行了系统的讨论．结果表明，第四纪红壤中的各种必需阴离子态养分含量与土壤耕作熟化措施有关．荒地的ＮＯ、Ｃｌ－、Ｈ２ＢＯ较高，而开垦为旱地后，它们的含量下降；Ｈ２ＰＯ在土壤经过耕作熟化后有所提高；ＭｏＯ的含量则基本保持不变；与其它阴离子显著不同的是．经耕作熟化后，土壤有效性ＳＯ含量急剧增加，不同的阴离子态养分在土壤剖面中的分布特点不同．

Anionic Nutrients Concentration and Profile Distribution in Quaternary Red Soil.

The concentration and profile distribution of six anionic nutrients of Quaternary red soil were discussed systematically in this paper. The results showed that the necessary anionic nutrients was related to soil mellowing methods. The concentration of NO3-. Cl- and H2BO3- in barren soil were relatively high, and they were decreased after the soil was reclaimed as arable arid land.The concentration of H2PO4- was increased slightly after the soil was cultivated, and that of MoO4(2-) was changed little. Remarkably different from other anions, soil available SO4(2-) was increased dramatically after soil was cultivated. The profile distribution characteristics of different anionic nutrients was different.