Effect of the storage conditions of soil samples on carbon and nitrogen extractability
- 作者: Makarov M.1, Kuznetsova E.1, Malysheva T.1, Maslov M.1, Menyailo O.2
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隶属关系:
- Lomonosov Moscow State University
- Sukachev Institute of Forest Research
- 期: 卷 50, 编号 5 (2017)
- 页面: 549-558
- 栏目: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/223993
- DOI: https://doi.org/10.1134/S1064229317030085
- ID: 223993
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Concentrations of carbon and nitrogen extractable by 0.05 M K2SO4 (Cext and Next, respectively) in 14 soils of different ecosystems vary from 16 to 205 and from 4 to 53 mg/kg, respectively. The portion of Cext in soil organic matter is 0.06 to 0.38% of total carbon, and the portion of Next is 0.12–1.05% of total nitrogen. The storage of samples and their preparation to analysis differently affect the extractability of elements. The concentration of Cext is less variable than the concentration of Next. An increase in C extractability (by 1.4–6.7 times) is a common feature of all soils under drying; at the following incubation of dried soils, the extractability of C decreases by 28–56%. The extractability of N increases not only under drying (by 1.5–7.1 times) and the following incubation of samples (by 25–60% to 2–3 times), but also under freezing of most soils and at the incubation of fresh and defrozen samples. A close direct correlation is observed between the initial water content of soil and the relative increase in C extractability under drying and N extractability under freezing and drying.
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作者简介
M. Makarov
Lomonosov Moscow State University
编辑信件的主要联系方式.
Email: mmakarov@soil.msu.ru
俄罗斯联邦, Moscow, 119991
E. Kuznetsova
Lomonosov Moscow State University
Email: mmakarov@soil.msu.ru
俄罗斯联邦, Moscow, 119991
T. Malysheva
Lomonosov Moscow State University
Email: mmakarov@soil.msu.ru
俄罗斯联邦, Moscow, 119991
M. Maslov
Lomonosov Moscow State University
Email: mmakarov@soil.msu.ru
俄罗斯联邦, Moscow, 119991
O. Menyailo
Sukachev Institute of Forest Research
Email: mmakarov@soil.msu.ru
俄罗斯联邦, Krasnoyarsk, 660036