文献类型：期刊文献

英文题名：The effect of enhanced rock weathering on soil respiration was modulated by understory removal in a subtropical fir plantation

作者：Li, Renshan[1,2] Zhang, Yankuan[1,6] Bai, Yanfeng[3] Zhang, Xiongqing[3] Zhang, Fangfang[2] Han, Xinkuan[2] Sun, Honggang[4] Zhang, Weidong[1,5] Yang, Qingpeng[1,5] Wang, Silong[1,5]

第一作者：Li, Renshan

通信作者：Zhang, WD[1];Yang, QP[1];Zhang, WD[2];Yang, QP[2]

机构：[1]Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Huitong Expt Stn Forest Ecol, Shenyang 110016, Peoples R China;[2]Luoyang Normal Univ, Coll life Sci, Luoyang 471934, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[5]Huitong Natl Res Stn Forest Ecosyst, Huitong 418307, Peoples R China;[6]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2025

卷号：375

外文期刊名：AGRICULTURAL AND FOREST METEOROLOGY

收录：;Scopus(收录号：2-s2.0-105018110455);WOS:【SCI-EXPANDED(收录号:WOS:001594722200001)】；

基金：This work was supported by the National Key Research and Devel-opment Program of China (Grant Nos. 2022YFF1303003 and 2021YFD2201303) , the National Natural Science Foundation of China (Grant No. U22A20612) , Henan Province Science and Technology Breakthrough Project (242102320148) , and Natural Science Foundation of Henan Province (202300410287) . We also thank Xiuyong Zhang, Xiaojun Yu, and Ke Huang for their invaluable assistance in the labo-ratory and the field work.

语种：英文

外文关键词：Wollastonite application; Plantation management; Carbon sequestration; Soil CO 2 emission; Climate change

摘要：Enhanced rock weathering (ERW) involving the modification of soils with crushed silicate rock is proposed an efficient CO2 removal technology. However, a comprehensive understanding of the influence of silicate rock application on soil respiration (Rs), especially under different silvicultural regimes, is still lacking, limiting our awareness of the potential for ERW to remove CO2. In this study, a wollastonite addition (WA) experiment was conducted in a Chinese fir plantation with or without understory removal (UR). The Rs and its heterotrophic (Rh) and autotrophic (Ra) components were measured for each treatment over a two-year period. Results showed that WA significantly increased Rs and Ra by 16.1 % and 51.8 %, respectively, but had no effect on Rh. Soil pH value was markedly increased by WA by 12.5 %, from 4.40 to 4.95, on average. The concentrations of available Si and exchangeable Ca and Mg increased but that of exchangeable Al decreased after WA. It seems that WA has provided the plants with higher nutrient availability and lower aluminum toxicity, thereby benefiting root activity. This pattern was evidenced by the positive correlations between Ra and soil pH value, exchangeable Ca and available Si concentration, as well as by the negative correlation between Ra and exchangeable Al concentration. Moreover, the effect of WA on Rs was interactively regulated by UR, leading to a weaker WA effect at understory-free stands. This study highlighted that the increase in soil CO2 efflux by WA should be taken into consideration while assessing the CO2 removal potential from ERW.