有机肥施用年限对碱化草甸土腐殖质组成的影响

Effects of different age of application organic fertilization on humus fractions in alkalized meadow soil

以黑龙江省肇州县永乐镇15年的长期施用有机肥试验为平台,分析了有机肥不同施用年限对碱化草甸土腐殖质组成和胡敏酸光学性质的影响。农牧结合长期施用有机肥,使土壤中总有机碳含量以及腐殖质中胡敏酸碳、胡敏素碳含量随改良年限的增加而增加,分别提升了116.3%、120.7%和259.2%,与对照比较差异显著,对富里酸碳含量的影响不大;同时胡敏酸与富里酸的比值也提高了129.2%,土壤的理化性质得到了改善;使色调系数(△logK)在15年间总体呈增大趋势,提高了35.7%。为利用农牧结合的方式改良碱化草甸土提供依据。

Humus fractions and optical property of humic acid on alkalized meadow soil were analyzed during different age at the 15 years long-term organic fertilization in Yongle town,Zhaozhou county,Heilongjiang province.Through the combination of agriculture and animal husbandry,long-term organic fertilization on saline soil,soil total organic carbon content and humic acid,humin content in humus were increased by 116.3%,120.7% and 259.2% with years increased significantly,but it had little effect on fulvic acid,compared with the control;The HA/FA was increased by 129.2% and the physical and chemical properties of soil had also been improved;The logK during 15 years showed a increasing trend and increased by 35.7%.This test would provide a scientific theoretical basis for thoroughly improving alkalized meadow soil by the combination of agriculture and animal husbandry.