摘要
通过8年长期定位试验,研究了不同施肥方式对褐土有机无机复合状况及腐殖质结合形态的影响。结果表明,长期不施肥使土壤有机碳、重组有机碳、原土复合量、松结态和紧结态有机碳含量明显下降,松/紧值降低,原土复合度上升;长期单施常量NPK化肥有同样的趋势;长期单施增量NPK化肥可大体保持土壤肥力水平不下降,但成本较高;采用有机肥(物)料配施常量NPK化肥,可明显提高土壤有机碳、重组有机碳含量和原土复合量以及土壤松、稳、紧各级结合态有机碳含量,增加松结态占重组有机碳比率,提高松/紧值,增强土壤调控能力。土壤有机无机复合状况及腐殖质结合形态是评价褐土培肥效果和标志土壤肥力演变的重要指标。
Effeet of an 8 years experiment with different kinds of fertilizer application treatments on organic-mineral complex and humus united pattern was conducted. The results showed that under long-term no fertilization the content of soil organic matter, heavy humus, complex amount of native soil, loose and tight humus decreased. The same tendency showed with long-term application of chemical NPK fertilizer alone. Under long-term organic manure together with constant NPK fertilizer, soil organic matter, heavy humus, complex amount of native soil and loose, stable and tight humus increased significantly , and also the proportion of loose united humus to heavy humus and the ratio of loose to tight united humus increase. The organic-inorganic complex and humus united pattern were important indices of soil fertility.
出处
《土壤通报》
CAS
CSCD
北大核心
2004年第6期720-723,共4页
Chinese Journal of Soil Science
基金
河北省科委"九五"重点攻关计划(96220916D-4)
