NITROGEN MINERALIZATION POTENTIALS OF SHRUB-STEPPE SOILS WITH DIFFERENT DISTURBANCE HISTORIES

被引：76

作者：

BOLTON, H ^{[1
]}

SMITH, JL ^{[1
]}

WILDUNG, RE ^{[1
]}

机构：

[1] USDA ARS, PULLMAN, WA 99164 USA

来源：

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL | 1990年 / 54卷 / 03期

关键词：

D O I：

10.2136/sssaj1990.03615995005400030046x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The soil N-mineralization potential (No) was determined for two arid ecosystems, an undisturbed perennial shrub-steppe and an annual grassland. The No decreased with soil depth until the 10- to 15-cm soil depth, when all soils had the same value. The production of plant-available N will, therefore, be largely limited to the soil surface, and losses from the first 5 cm of soil will be detrimental to both ecosystems. Spatial distribution of plant species in the arid ecosystem result in "islands' where enhanced N mineralization occurs. -from Authors

引用

页码：887 / 891

页数：5

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