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Fine root biomass and production regarding root diameter in Pinus densiflora and Quercus serrata forests: Soil depth effects and the relationship with net primary production

Authors
Han, Seung HyunKim, SeongjunChang, HannaKim, Hyun-JunAn, JiaeSon, Yowhan
Issue Date
2021
Publisher
TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY
Keywords
Environmental condition; productivity indicator; soil depth; very fine root
Citation
TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, v.45, no.1, pp.46 - 54
Indexed
SCIE
SCOPUS
Journal Title
TURKISH JOURNAL OF AGRICULTURE AND FORESTRY
Volume
45
Number
1
Start Page
46
End Page
54
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50662
DOI
10.3906/tar-1912-13
ISSN
1300-011X
Abstract
This study aimed to examine the effects of soil depth on fine root biomass (FRB) and production (FRP), and determine the relationship between FRP and net primary production (NPP) across two root diameter classes (<1 and 1-2 mm) in Pinus densiflora and Quercus serrata forests. FRB and FRP were investigated from April 2016 to March 2017 using the soil sequential coring and ingrowth core methods. In P densiflora and Q. serrata forests, mean FRB < 1 mm (2.22 +/- 0.23 and 2.63 +/- 0.23 Mg ha(-1)) and annual FRP < 1 mm (0.97 +/- 0.09 and 1.55 +/- 0.16 Mg ha(-1)year(-1)) were higher than mean FRB 1-2 mm (0.63 +/- 0.12 and 1.72 +/- 0.38 Mg ha(-1)) and annual FRP 1-2 mm (0.26 +/- 0.14 and 0.20 +/- 0.06 Mg ha(-1)year(-1)) at 0-30 cm depth. Soil properties, such as soil moisture, organic matter, and inorganic nitrogen, decreased with soil depth (0-30 cm). The gradient of soil properties corresponding with soil depth could directly and indirectly influence FRP <1 mm, resulting in higher FRB <1 mm and FRP <1 mm at topsoil (0-10 cm). Additionally, only FRP <1 mm showed significant relationships with NPP and litter production. Although very fine roots (<1 mm in diameter) occupied a small percentage of NPP (7.5%), they may be an important factor for predicting forest NPP, since NPP would be regulated by the capability of roots to absorb water and nutrients. Our findings indicate that finer roots are more sensitive to soil conditions than thicker roots, and they could he a forest productivity indicator.
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생명과학대학 (환경생태공학부)
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