HUMAN URINE - CHEMICAL-COMPOSITION AND FERTILIZER USE EFFICIENCY

被引：247

作者：

KIRCHMANN, H

PETTERSSON, S

机构：

[1] Department of Soil Sciences, Swedish University of Agricultural Sciences, Uppsala, S-75007

来源：

FERTILIZER RESEARCH | 1995年 / 40卷 / 02期

关键词：

HEAVY METALS; IONIC COMPOSITION; N-15- AND P-32 TRACER; PLANT NUTRIENTS; POT EXPERIMENT;

D O I：

10.1007/BF00750100

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Stored human urine had pH values of 8.9 and was composed of eight main ionic species (> 0.1 meg L(-1)), the cations Na, K, NH4, Ca and the anions, Cl, SO4, PO4 and HCO3. Nitrogen was mainly (> 90%) present as ammoniacal N, with ammonium bicarbonate being the dominant compound. Urea and urate decomposed during storage. Heavy metal concentrations in urine samples were low compared with other organic fertilizers, but copper, mercury, nickel and zinc were 10-500 times higher in urine than in precipitation and surface waters. In a pot experiment with N-15 labelled human urine, higher gaseous losses and lower crop uptake (barley) of urine N than of labelled ammonium nitrate were found. Phosphorus present in urine was utilized at a higher rate than soluble phosphate, showing that urine P is at least as available to crops as soluble P fertilizers.

引用

页码：149 / 154

页数：6