阴离子态养分从第四纪红壤中的淋失特征

在实验室条件下，将第四纪红壤进行淋洗试验，旨在研究第四纪红壤中阴离子态养分的含量及其淋失特征。结果表明，第四纪红壤中各种可溶发生 阴离子态养分含量除ＮＯ＾－３和Ｃｌ＾－外，其它都是很低的，６种阴离子在第四纪红壤中的淋失强弱顺序是：Ｃｌ＾－〉ＮＯ＾－３〉Ｈ２ＢＯ＾－３〉ＳＯ＾２－４〉ｍＯｏ＾２－４？〉ｈ２ｐｏ＾－４，而土壤对它们的固定或吸附能力则相反。

THE WASHING CHARACTERISTICS OF ANIONIC NUTRIENTS FROM QUATERNARY RED SOIL

In order to research the amount of anionic nutrients and their washing characteristics in Quaternary red soil, a washing experiment was laid in laboratory condition. The results showed that the amounts of anionic nutrients except NO3- and Cl- were very low in Quaternary red soil, the order of washing of six anions was Cl->NO3->H2BO3- > SO42->MoO42->H2PO4-, and the fixing or adsorbing order was reversible. There was a common process from dramatic decrease to stable washing among Cl- , NO-T , H2BO3- , SO42- and H2PO7. But MoO42- may be different from that process. The washing amount between companion cation Na+ and anions were almost the same.