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Number of Replications during Monitoring of the Soil Organic Carbon Content in Forestстатья
Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
- Авторы: Samsonova V.P., Meshalkina J.L., Kondrashkina M.I., Dyadkina S.E.
- Журнал: Moscow University Soil Science Bulletin
- Том: 79
- Номер: 1
- Год издания: 2024
- Издательство: Allerton Press Inc.
- Местоположение издательства: United States
- Первая страница: 13
- Последняя страница: 18
- Оригинальные версии: К вопросу о числе повторностей при мониторинговых наблюдениях за содержанием почвенного углерода в лесу
- DOI: 10.3103/s0147687424010071
- Аннотация: The estimation of the required number of soil samples to assess the content of soil organic carbon(SOC) in forest biogeocenosis during monitoring studies is considered using the example of data given in anarticle by E.A. Dmitriev et al. Primary data on the SOC content were obtained in a spruce forest at 166 sitesin layers of 0–10, 10–20, and 20–30 cm after removal of the litter. The sampling was performed at points ofa regular grid formed by equilateral triangles with 1-m sides within a regular hexagon with a side of 7 m. TheSOC content was determined by the method by Tyurin. The original article presents statistics for three zones:near-trunk, under-crown, and inter-crown. The spatial variation of carbon content in all the zones and at alldepths is high, the coefficients of variation are about 50%. It is shown that the number of replications requiredto estimate the mean SOC content at a 95% confidence level is hundreds of samples in the 0- to 10-cm layerand decreases to tens of samples in the 20- to 30-cm layer. Since the number of replications for testing hypoth-eses about the equality of means depends not only on the confidence level, but also on the power of the cri-terion used, the required number of replications increases several times. Testing by samples taken from theentire vertical 0- to 30-cm-thick layer with the formation of composite samples reduces the number ofrequired replications. However, careful observation of sample preparation, including primary mixing of sam-ples, is required.
- Добавил в систему: Кондрашкина Марина Иосифовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Samsonova.pdf | 392,1 КБ | 4 апреля 2024 [kondra] | |
| 2. | Ekspertiza.pdf | Ekspertiza.pdf | 3,2 МБ | 24 апреля 2024 [kondra] |