摘要
对黄土区分布较广的上和黄绵土、长期施用化肥和有机肥条件下、有机质氧化稳定性和活性进行了较系统的研究。结果表明,长期施用有机肥或配施化肥,均能促进耕层土壤易氧化有机质和活性有机质积累,提高Kos值;长期施用化肥,只能促进土壤有机质的老化,提高难氧化有机质含量和Kos值,对易氧化有机质和活性有机质无积极作用。通径分析和逐步回归分析表明,与易氧化有机质和活性有机质关系最为密切的农化性状先是速效磷,其次是碱解氮。
Under the condition of Long-term(6,8,10
years)application of chemical andorganic fertilizers to lou soil and yellow loamy soil,the
stability and activity of soil organicmatter were studied systemetically.The results Showed that
the oxidable,active organicmatters and the coefficient of oxidable stabilily(Kos value)all
increased with long-termapplication of organic fertilizer or combined with chemical fertilizer,and
that long-termapplication of chemical fertilizer had little positive effect on the oxidable and
active organicmatters,but the difficutly oxidable organic matter and the Kos value were
improved.Bymeans of gradual regreission analysis and path coefficient analysis,it showed that
the oxid-able and active organic matters had close correlation with the available phosphorus
and theavailable nitrogen
出处
《河南农业大学学报》
CAS
CSCD
1996年第1期80-84,共5页
Journal of Henan Agricultural University
关键词
施肥
LOU土
黄绵土
有机质
氧化稳定性
application of fertilizer
lou soil
yellow loamy soil
organic
matter
oxidablestability