研究方向
研究領(lǐng)域為土壤生物化學(xué)，主要研究方向：土壤碳-氮-磷耦合循環(huán)及其環(huán)境效應(yīng)。以中國東部南北樣帶（NSTEC）和中國草地樣帶（CGT）上代表性的森林和草地生態(tài)系統(tǒng)為研究對象，構(gòu)建多形態(tài)的氮沉降和氮磷添加控制試驗，運用生物地球化學(xué)、同位素地球化學(xué)和分子生物學(xué)等手段。
重點研究
（1）土壤碳氮磷的賦存形態(tài)、轉(zhuǎn)化與功能微生物群落組成之間的關(guān)聯(lián)機制；
（2）植物-土壤-微生物交互作用對土壤碳氮磷動態(tài)的調(diào)控機制；
（3）土壤－大氣界面碳氮氣體通量（CO2、CH4、N2O和NO）的產(chǎn)生、消耗及其對氮磷添加的非線性響應(yīng)機制；
（4）大氣氮磷沉降對土壤有機質(zhì)組成和化學(xué)穩(wěn)定性的影響機制。
研究成果
過去10年（2005-2015），以土壤碳氮交互作用為研究方向，依托樣帶控制試驗和室內(nèi)培養(yǎng)實驗兩個平臺，從分子、界面和生態(tài)系統(tǒng)三個尺度，系統(tǒng)研究了氮沉降增加對土壤微生物功能群、碳氮氣體通量和SOM穩(wěn)定性的影響。率先開展多形態(tài)、低劑量的氮沉降控制試驗研究，闡明了氮素富集與土壤酸化的相互作用，提出土壤碳氮通量對增氮的非線性響應(yīng)模式，揭示了增氮影響土壤碳截存的生物化學(xué)機制。迄今，在國內(nèi)外期刊發(fā)表學(xué)術(shù)論文102篇，SCI收錄42篇，CSCD收錄60篇；其中以第一/通訊作者發(fā)表論文50篇，SCI收錄22篇，參寫專著6部。主持課題16項，包括3項國家自然科學(xué)基金、1項“秉維”優(yōu)秀青年人才基金和7項科技部973、基金委重大/重點基金專題。
代表論著
1. Wang Yongsheng, Cheng Shulan, Fang Huajun*, Yu Guirui, Yang Xueming, Xu Minjie, Dang Xusheng, Li Linsen, Wang Lei. Significant regulations of ammonia-oxidizing communities to methane uptake and nitrous oxide emission from the subtropical plantation soil under nitrogen enrichment. European Journal of Soil Biology
2. Gao Zhaoqin, Fang Huajun*, Bai Junhong, Jia Jia, Lu Qiongqiong, Wang Junjing, Chen Bin. Spatial and seasonal distributions of soil phosphorus in a short- term flooding wetland of Yellow River Estuary, China. Ecological Informatics
3. Li Xiaoyu, Cheng Shulan, Fang Huajun*, Yu Guirui, Dang Xusheng, Xu Minjie, Wang Lei, Si Gaoyue, Geng Jing, He Shun. The contrasting effects of deposited NH4+ and NO3- on soil CO2, CH4 and N2O fluxes in a subtropical plantation, southern China. Ecological Engineering
4. Chen Hao, Li Dejun , Geshere A. Gurmesa, Yu Guirui , Li Linghao , Zhang Wei , Fang Huajun, Mo Jiangming . Effects of nitrogen deposition on carbon cycle in terrestrial ecosystems of China: A meta-analysis. Environmental Pollution
5. Wang Yongsheng, Cheng Shulan, Fang Huajun*, Yu Guirui, Xu Xiaofeng, Xu Minjie, Wang Lei, Li Xiaoyu, Si Gaoyue, Geng Jing, He Shun. Contrasting effects of ammonium and nitrate deposition on soil CO2 emission in a subtropical plantation of southern China. Biology and Fertility of Soils
6. Yuan Wenping, Cai Wenwen, Anthony L. Nguy-Robertson, Fang Huajun?, Andrew E. Suyker, Chen Yang, Dong Wenjie, Liu Shuguang, Zhang Haicheng. Uncertainty in simulating gross primary production of cropland ecosystem from satellite-based models. Agricultural and Forest Meteorology
7. Wang Yongsheng, Cheng Shulan, Yu Guirui, Fang Huajun*, Xu Minjie, Gao Wenlong. Response of carbon utilization and enzymatic activities to nitrogen deposition in three forests of subtropical China. Canadian Journal of Forest Research
8. Fang Huajun, Cheng Shulan, Lin Erda, Yu Guirui, Wang Yongsheng, Xu Minjie, Dang Xusheng, Li Linsen, Wang Lei. Stimulation of microbial activity reduces contents of water-extractable organic carbon in an agricultural soil under elevated atmospheric carbon dioxide concentrations. Biogeochemistry
9. Fang Huajun, Cheng Shulan, Wang Yongsheng, Yu Guirui, Xu Minjie, Dang Xusheng, Li Linsen, Wang Lei. Changes in soil heterotrophic respiration, carbon availability, and microbial function in seven forests along a climate gradient. Ecological Research
10.Fang Huajun, Cheng Shulan, Yu Guirui, Xu Minjie, Wang Yongsheng, Li Linsheng, Dang Xusheng, Wang Lei, Li Yingnian. Experimental nitrogen deposition alters the quantity and quality of soil dissolved organic carbon in an alpine meadow on the Qinghai-Tibetan Plateau
11.Fang Huajun, Cheng Shulan, Yu Guirui, Yang Xueming, Xu Minjie, Wang Yongsheng, Li Linsheng, Dang Xusheng, Wang Lei, Li Yingnian. Nitrogen addition changed the composition and stability of soil organic matter in an alpine meadow on the Qinghai-Tibetan Plateau
12.Fang Huajun, Cheng Shulan, Yu Guirui, Jules Cooch, Wang Yongsheng, Xu Minjie, Li Linsen, Dang Xusheng, Li Yingnian. Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau
13.Wang Yongsheng, Cheng Shulan, Fang Huajun*, Yu Guirui, Xu Minjie, Dang Xusheng, Li Linsen, Wang Lei. Simulated nitrogen deposition reduces CH4 uptake and increases N2O emission from a subtropical plantation forest soil in southern China
14.Xu Minjie, Cheng Shulan, Fang Huajun*, Yu Guirui, Gao Wenlong,·Wang Yongsheng, Dang Xusheng. Low-level nitrogen addition promotes net methane uptake in a boreal forest across the Great Xingu2019an Mountain region, China. Forest Science
15.Sheng Wenping, Yu Guirui, Fang Huajun, Liu Yingchun, Wang Qiufeng, Chen Zhi, Zhang Li. Nitrogen deposition influences the regional pattern of foliage 15N natural abundance in eastern China. Scientific Reports
16.Sheng Wenping, Yu Guirui, Fang Huajun, Jiang Chunming, Yan Junhua, Zhou Mei. Sinks for Inorganic Nitrogen Deposition in Forest Ecosystems with Low and High Nitrogen Deposition in China
17.Jia Yanlong, Yu Guirui*, He Nianpeng, Zhan Xiaoyun, Fang Huajun, Sheng Wenping, Zuo Yao, Zhang Dayong & Wang Qiufeng. Spatial and decadal variations in inorganic nitrogen wet deposition in China induced by human activity. Scientific Reports
18.Gao Wenlong, Cheng Shulan, Fang Huajun*, Chen Yan，Yu Guirui, Zhou Mei, Zhang Peilei, Xu Minjie. Effects of simulated atmospheric nitrogen deposition on inorganic nitrogen content and acidification in a cold-temperate coniferous forest soil
19.Gao Yang, Yu Guirui, He Nianpeng, He Hongling, Wang Qiufeng, Fang Huajun. Is there an Existing Healthy Threshold for Carbon Storage in the Ecosystem? Environmental Science & Technology
20.Fang Huajun, Cheng Shulan, Yu Guirui, Zheng Jiaojiao, Zhang Peilei, Xu Minjie, Li Yingnian, Yang Xueming. Responses of CO2 efflux from an alpine meadow soil on the Qinghai Tibetan Plateau to multi-form and low-level N addition
21.Fang Huajun, Yu Guirui, Cheng Shulan, Zhu Tianhong, Zheng Jiaojiao, Mo Jiangming, Yan Junhua. Nitrogen-15 signals of leaf-litter-soil continuum as a possible indicator of ecosystem nitrogen saturation by forest succession and N loads
22.Fang Huajun, Yu Guirui, Cheng Shulan, Zhu Tianhong, Wang Yuesi Yan Junhua, Wang Miao, Cao Min, Zhou Mei. Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils
23.Cheng Shulan, Fang Huajun*, Yu Guirui, Zhu Tianhong, Zheng Jiaojiao, Yang Xueing, Zhang Xiaoping, Yu Guirui. Effects of soil erosion and deposition on soil organic carbon dynamics at a sloping field in Black Soil region, Northeast China. Soil Science and Plant Nutrition
24.Cheng Shulan, Fang Huajun*, Yu Guirui, Zhu Tianhong, Zheng Jiaojiao. Foliar and soil 15N natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems
25.Jiang Chunming*, Yu Guirui, Fang Huajun, Cao Guangmin and Li Yingnian. Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China. Atmospheric Environment
26.Fang Huajun, Yu Guirui, Cheng Shulan, Mo Jiangming, Yan Junhua, Li Shenggong. 13C abundance, water-soluble and microbial biomass carbon as potential indicators of soil organic carbon dynamics in subtropical forests at different successional stages and subject to different nitrogen loads. Plant and Soil
27.Fang Huajun, Cheng Shulan, Zhang Xiaoping, Liang Aizhen, Yang Xueming, Drury C F. Impact Of Soil Redistribution In A Sloping Landscape On Carbon Sequestration In Northeast China. Land Degradation & Development
28.Fang Huajun, Yang Xueming, Zhang Xiaoping, Liang Aizhen. Using 137Cs Tracer Technique to Evaluate Soil Erosion and Deposition of a Black Soil in Northeast China
29.Yu Guirui, Fang Huajun, Gao Lupeng, Zhang Wenjuan. Soil organic carbon budget and fertility variation of black soils in Northeast China. Ecological Research