AN INTRODUCTION TO THE GLOBAL NITROGEN-CYCLE

被引：34

作者：

JENKINSON, DS

机构：

[1] Soils and Agronomy Department, Afrc Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Hertfordshire

[2] Department of Soil Science, University of Reading, Reading, RG1 5AQ, London Road

来源：

SOIL USE AND MANAGEMENT | 1990年 / 6卷 / 02期

关键词：

D O I：

10.1111/j.1475-2743.1990.tb00800.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Abstract. Current estimates are tabulated for the quantities of nitrogen circulating in the global nitrogen cycle. Five gases, NH3, N2O, NO, NO2 and N2, dominate the movement of nitrogen between the earth's surface and the atmosphere. The input of combined nitrogen to the land surface of the earth is tentatively estimated at 290 million tonnes per year, a total which includes 74 million tonnes from fertilizers. Known outputs from land (as gaseous NH3, N2O and NOX, and as inorganic nitrogen carried to the sea by rivers) are much less, totalling 130 million tonnes per year. Emissions of N2 gas probably account for most of the difference. There has been an increase in the use of nitrogen of about 5% per year over the last ten years. The demand for fertilizer nitrogen is likely to continue to grow if the population of the world continues to increase. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：56 / 61

页数：6

共 38 条

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