黄棕壤矿物固定态铵的释放与黑麦草种植密度的关系  

Relationship Between the Release of Fixed ammonium from Yellow Brown Soil and the Density of Ryegrass

作　　者：陆海明[1] 封克[1] 王小治[1] 盛海君[1] 

机构地区：[1]扬州大学农学院,江苏扬州225009

出　　处：《土壤通报》2002年第3期181-184,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金资助 (39770 4 2 7)

摘　　要：通过在黄棕壤上种植不同密度的黑麦草后发现 ,土壤矿物固定态铵在旱作条件下可分为两大部分 :一是原有的矿物固定态铵。这部分铵在试验条件下无任何释放 ,即与黑麦草的种植密度无关 ;二是施肥后新增加的固定态铵。这部分铵的释放与黑麦草种植密度关系密切。该部分又可分为易释放部分和不易释放部分 ,前者与种植密度关系较小 ,而后者与种植密度关系较大 。A biological experiment was conducted to investigate the relationship between release of fixed ammonium and planting density. The results showed that the fixed ammonium after applicating NH 4 +-N could be divided into two parts, the native fixed ammonium and the newly fixed ammonium. The native fixed ammonium had almost no release after planting. According to its availability to plant the newly fixed ammonium could be further subdivided into two fractions. One was the easily released and the release of another was to great extent dependent on the planting density.

关 键 词：黄棕壤 矿物固定态铵 黑麦草 种植密度 铵释放 

分 类 号：S155.24[农业科学—土壤学] S543.6[农业科学—农业基础科学]