摘要
在兼顾土壤类型与样点空间分布相对均匀性的前提下 ,采集了中国东北地区具有代表性的3个县 (吉林省公主岭、黑龙江省的海伦县和北安县 )的黑土样点190个。采用元素分析仪法对不同地区的黑土中有机质、全氮和全硫进行分析 ,同时采用常规法对其全磷含量进行测定。结果表明 :不同地区黑土中的有机质、全氮、全硫和全磷含量存在明显差异 ,公主岭地区各项指标均低于北安地区 ,海伦地区居中 ,表现出随纬度的增加而不断提高的趋势。不同地区黑土中有机质和全氮含量随开垦年限增长而降低 ,全硫和全磷的含量变化则不明显。由于黑土中有机质、全氮、全硫和全磷含量之间存在明显相关关系 。
The organic matter, total N and total S in black soils (Isohumosols) selected from 3 areas in the northeastern of China were determined with Elementar III (Germany) and the total P was analyzed with the normal method. The results showed that there were great differences of organic matter, total N, total S and total P among the different areas. Generally, their contents went up with the increase of the latitude. The organic matter and total N (Y) decreased with the increase of reclamation years (t). And they all fit into the formula, Y=Xe-λt. Due to the significant relationships of organic matter with total N, total S and total P, the organic matter could be regarded as an integrated fertility index of Isohumosols.
出处
《沈阳农业大学学报》
CAS
CSCD
2002年第4期270-273,共4页
Journal of Shenyang Agricultural University
基金
国家重点基础发展规划项目(G1999011810)
