不同培肥措施对冀东褐土腐殖质结合形态的影响

研究了不同培肥措施对冀东褐土腐殖质结合形态的影响。结果表明 ,松结态腐殖质含量及其占重组腐殖质比率和松 /紧比值是评价冀东褐土培肥效果和标志土壤肥力水平的重要指标。长期不施肥或单施常量NPK化肥 ,使土壤松结态和紧结态腐殖质均有所下降 ,松结态占重组腐殖质比率和松 /紧比值减小 ;采用有机肥 (物 )料配施常量NPK化肥 ,可明显增加土壤松、稳、紧结态腐殖质含量 ,提高松结态占重组腐殖质比率和松 /紧比值 ,使土壤腐殖质得到活化和更新 ,增强土壤供养能力 ,提高土壤肥力

THE EFFECT OF IMPROVING SOIL FERTILITY IN DIFFERENT MEASURES OF HUMUS UNITED IN THE CINNAMON SOIL OF THE EASTERN PARTS OF HEBEI PROVINCE

In this paper, the effect of improving soil fertility with different measures on humus united pattern in cinnonmon soil was studied The results showed the proportion of loose united humus to heavy humus and the ratio between loose and tight united humus were important indices of reflecting the effect of improving soil fertility Using no fertilizer or mere constant NPK fertilizer not only lessened the content of the loose and tight united humus but also decreased the proportion of loose and tight united humus to heavy humus and the ratio between loose and tight united humus Using organic fertilizer in combination with chemical fertilizer not only raised the content of loose, stable and tight united humus but also the proportion of the loose united humus to heavy humus and the ratio between the loose and tight united humus Humus was activated and renewed The supply of soil nutrition and soil fertility was improved