Fine Root Decomposition and Nutrient Release of Pinus Massoniana in the Three Gorges Reservoir Area

• Published in: Forest research (Beijing) Vol. 30; no. 1
• Main Authors: Wang, Na, Cheng, Rui-mei, Xiao, Wen-fa, Shen, Ya-fei
• Format: Journal Article
• Language: Chinese
• Published: 01.02.2017
• Subjects: Pinus; Pinus massoniana
• ISSN: 1001-1498
• DOI: 10.13275/j.cnki.lykxyj.2017.01.003

[Objective]The purpose of this study is to determine the contribution of fine root of Pinus massoniana L. on soil nutrient pool. [Method]Decomposition experiment,using the buried bag method,was conducted to examine < 0. 5 mm,0. 5 1 mm and 1 2 mm fine root decomposition dynamics and nutrient release( C,N,P,K,Ca,Mg) in Pinus massoniana at Jiulingtou Forest Farm of Zigui county,Three Gorges Reservoir Area,China.[Result]The results showed that:( 1) the decomposition rate decreased with root diameter increasing of Pinus massoniana,and after 368 days,the remaining percentage of < 0. 5 mm,0. 5 1 mm and 1 2 mm fine root were66. 0%,72. 0% and 74. 33% respectively.( 2) The soil temperature had significant positive effect on decomposition rate,and soil moisture had positive effect on decomposition rate.( 3) The transfer model for C,K and Mg of fine root was releasing,while enriching for Ca.( 4) The transfer models for N and P of < 0. 5 mm,0. 5 1 mm and 1 2 mm fine root were different,the transfer models for N and P of <