THE EFFECT OF CHANGING LAND-USE ON SOIL RADIOCARBON

被引：76
|
作者：
HARRISON, KG
BROECKER, WS
BONANI, G
机构：
[1] COLUMBIA UNIV,LAMONT DOHERTY GEOL OBSERV,PALISADES,NY 10964
[2] SWISS FED INST TECHNOL,INST MITTELENERGIEPHYS,CH-8093 ZURICH,SWITZERLAND
来源：
SCIENCE | 1993年 / 262卷 / 5134期
关键词：
D O I：
10.1126/science.262.5134.725
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Most carbon budgets require greening of the terrestrial biosphere as a sink for some of the excess carbon dioxide produced by fossil fuel burning and deforestation. Much of this storage is thought to occur in soils, but running counter to this conclusion is the observation that cultivation has reduced the agricultural reservoir of soil humus. Radiocarbon measurements in agricultural soils lend support to this browning of agricultural lands. Moreover, the loss is from the fast cycling portion of the humus.
引用
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页码：725 / 729
页数：5
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