[Impact of land use change and cultivation measures on soil organic carbon (SOC) and its 13C values].
Huan Jing Ke Xue
; 31(8): 1733-9, 2010 Aug.
Article
en Zh
| MEDLINE
| ID: mdl-21090286
In Quzhou County, Hebei Province where now intensive farming system is operated, original grassland and farming land under different tillage, crop straw return and fertilization measures were studied using isotope carbon for the analysis of the impact on soil organic carbon (SOC) properties. The research indicated that after change into farmland (34 years), SOC is significantly reduced and for 1 m of soil layer, the scope of reduction is from 13.3%-35% and this decrease happens in 0-40 cm of soil layer. After 8 years of fertilization, SOC can be increased at 0.83 g x kg(-1). No-tillage can significantly increase the SOC especially in 0-10 cm but plough will increase the SOC at 10-15 cm and 15-20 cm. Change of delta13 C of SOC due to land use change mainly happens in 0-20 cm, where input of organic materials from maize stored. In soil layer of 0-5 cm, only maximum 18% of SOC is from crop residues and in 15-20 cm, this percentage is about 5%.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compuestos Orgánicos
/
Suelo
/
Carbono
/
Isótopos de Carbono
/
Agricultura
País/Región como asunto:
Asia
Idioma:
Zh
Revista:
Huan Jing Ke Xue
Año:
2010
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
China