Characterization of Humic System in Fertilizer Raw Materials

The aim of the study was to characterize humus system of natural and artificial products. Humus systems from leonardite, lignite biotransformed with Trichoderma sp. （Plantagra）, plant materials after pyrolisis （charcoal） and composts are compared. Humus systems are characterized by Kononova-Belchikova＇s method, and heavy metals content was measured by atomic absorption spectroscopy （AAS）. Humic acids from the International Humic Substances Society （IHSS） collection are the standards for humus substances quality of compared products. Data obtained for leonardite indicate that the studied substances from factory, Izmir, Turkey contain humic acids over 94%. Compared to the standard, heavy metals content in these materials demonstrate high amounts. Organic carbon content in the composts is very low compared to the leonardite materials and IHSS collection, where the heavy metals content is lower. Biotransformed lignite is characterized with lower content of organic carbon, but humic acids are with high degree of humification. Results obtained show that the fourth studied humus systems may be used in agriculture on base of the high humic acids content. It is recommended to measure heavy metals content before applying the materials in agriculture.

用光谱参数定量和定性表征腐殖物质产品

近年来,腐殖物质产品在土壤和植物的应用越来越广泛。腐殖物质产品的有机碳含量和组成以及成熟度特性为其正确应用提供了有价值的信息,此类信息对于参与生产、销售腐殖物质产品的制造商、业务顾问和用户也至关重要。通过测定腐殖物质产品在紫外光区(300 nm)、可见光区(445和665 nm)及近红外光区(850 nm)的光谱特性,分析了光谱特性与商业腐殖物质产品定量指标之间的关系。