摘要
五年定位试验(1986～1990)结果表明,沼肥与化肥(氮)配合施用,明显地改善了土壤胶体的品质、增加了复合胶体的数量。随着沼肥用量增加,原土有机碳、原土复合量、复合体腐殖质松紧比及土壤全氮均显著增加,土壤容重降低,总孔隙增加,固相减少,气相增加,土壤物理性状改善,稻麦产量和品质提高。单施沼肥的增产及培肥地力效果优于单施等氮量化肥,而二者配合施用优于分别施用。研究提出了稻麦配合施用沼肥与化肥(氮)的数学模式。
Results of five-year's,fixed-point test proved that the comdining application the residae from biogas digesters and chemical fertilizer(Nitrogen)could remarkably improve the quality of soil colloid and the quantity of colloidal complex.With the increment in applying digester residue,the organic carbon,quantity of complexing,ratio of loose and tight state for humus complex as well as the total nitrogen in the soil all witnessed a significant increase.Meanwhile,the soil physical structure improved for the soil bulk density decreased.the tofal porosity increased,solid phase decreased and gas phase increased,hence,the yield and quality of rice and wheat improved.The effect of merely applying digester residue on improving the yield and soil fertility is more advantageous than that of simply applying chemical fertilizer of the same amount,however,the combining application of the above two fertilizers is better than respective application of each kind of fertilizer.The study pnt forward a mathatical model of combining application of digester residue and chemical fertilizer(nitrogen)for rice and wheat plants.
出处
《中国沼气》
北大核心
1992年第1期13-18,共6页
China Biogas
关键词
沼渣
土壤
复合胶体
稻
麦
产量
Digester
residue
soil
yield of rice and wheat
compound
colloid
