Effects of land use-cover change in the desert oasis system on topsoil carbon and nitrogen (middle of Heihe River basin, China)

• Autorzy: Niu R.-X. , Zhao X.-Y. , Liu J.-L. , Qin Y.
• Języki publikacji: EN

Abstrakty

EN

Land use/cover change (LUCC) is one of the main factors that influence the terrestrial carbon (C) and nitrogen (N) cycle. We examined the effects of land use/cover change on topsoil C, N, and microbial biomass C, N (MBC, MBN) and their relationship with other soil properties in the middle of Heihe river basin along a land use change gradient of 100-year farmland, 27-year farmland, 33-year pine forest, 28-year poplar forest, and 21-year shrubland, as well as native desert from which all the above cultivated systems are converted. Results revealed that land use conversion from native desert to the above cultivated ecosystems not only changed the basic eco-hydrological factors of the soil, such as improving the soil moisture and field capacity, decreasing the pH and salinity, but also altered the nutrient factors, such as improving the concentrations of soil organic C (SOC), total N (TN), MBC, MBN, NO₃⁻ -N and NH₄⁺ -N,. With the increase of cultivated years, land use conversion had an increasing impact on the C and N sequestration and soil nutrients stabilization.

Słowa kluczowe

EN

carbon; nitrogen; topsoil; Heihe River basin; China; land use; land cover change; chemical property; physical property

• Wydawca: -
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2013
• Tom: 61
• Numer: 1
• Opis fizyczny: p.45-54,fig.,ref.

Twórcy

autor

Niu R.-X.

• Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

autor

Zhao X.-Y.

autor

Liu J.-L.

autor

Qin Y.

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