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氮沉降背景下生物炭施用对土壤有机碳组分的影响
引用本文:宋凯悦,尹云锋,马亚培,石思雨,周杨,马红亮,高人.氮沉降背景下生物炭施用对土壤有机碳组分的影响[J].水土保持学报,2022,36(2):247-254.
作者姓名:宋凯悦  尹云锋  马亚培  石思雨  周杨  马红亮  高人
作者单位:1. 福建师范大学地理研究所, 福州 350007;2. 福建师范大学福建省植物生理生态重点实验室, 福州 350007
基金项目:福建省公益类科研院所专项(2020R1002005);国家自然科学基金项目(31470628,31770659)
摘    要:通过18个月的盆栽试验,以杉木幼苗为研究对象,研究不同水平氮(N)沉降背景下(N0(0)、低N(40 kg/(hm2·a))和高 N(80 kg/(hm2·a))生物炭(BC)施用(B0(0)、B1(12 t/hm2)和 B2(36 t/hm2))对土壤有机碳(SOC)组分的影响.结果表明:与对照相比,单独施用BC以及...

关 键 词:氮沉降  生物炭  人工林  有机碳组分  杉木
收稿时间:2021/8/19 0:00:00

Effects of Biochar Amendment on Soil Organic Carbon Fractions Under Simulated Nitrogen Deposition
SONG Kaiyue,YIN Yunfeng,MA Yapei,SHI Siyu,ZHOU Yang,MA Hongliang,GAO Ren.Effects of Biochar Amendment on Soil Organic Carbon Fractions Under Simulated Nitrogen Deposition[J].Journal of Soil and Water Conservation,2022,36(2):247-254.
Authors:SONG Kaiyue  YIN Yunfeng  MA Yapei  SHI Siyu  ZHOU Yang  MA Hongliang  GAO Ren
Institution:1. Institute of Geography, Fujian Normal University, Fuzhou 350007;2. Fujian Provincial Key Laboratory for Plant Eco-physiology, Fujian Normal University, Fuzhou 350007
Abstract:A pot experiment was conducted to investigate the effects of biochar (BC) amendment (0, 12, 36 t/hm2) on soil organic carbon (SOC) and its fractions in a Cunninghamia lanceolata seedling under different simulated levels of nitrogen (N) deposition (0, 40, 80 kg/(hm2·a) N) for 18 months. The results indicated that compared with the control, BC amendment significantly increased the contents of SOC, recalcitrant pool of carbon (RPC), and dissolved organic carbon (DOC) by 40.1%~99.2%, 104.0%~267.8% and 75.3%~194.7% under different levels of N deposition (P<0.05), respectively. Meanwhile, the proportion of labile C from acid hydrolysis (LPC) in SOC decreased significantly by 28.8%~53.3%, and the proportion of RPC in SOC increased significantly by 45.7%~84.6% in the treatments of BC amendment combined with N deposition (P<0.05). The effects were the most significant when higher-rate BC was applied alone (P<0.05). No significant differences were found in the content of LPC in the treatments of BC amendment alone or simulated N deposition alone, whereas LPC was significantly reduced under the higher BC amendment combined with simulated N deposition (P<0.05).The higher rate of simulated N deposition alone significantly decreased soil microbial biomass carbon (MBC) content and the proportion of MBC in SOC, but had no significant effect on the DOC content and the proportion of DOC in SOC. However, the interaction of simulated N deposition and higher rate of BC significantly increased the proportion of DOC in SOC (P<0.05). Correlation analysis suggested that soil pH and available nutrients (AP, AK) were positively correlated with SOC, RPC and DOC contents, and were significantly negatively correlated with LPC (P<0.01). Our results indicated that the interaction between simulated N deposition and BC amendment has the greatest impact on RPC fraction, which is conducive to improving the stability of SOC fractions and increasing soil C storage in the short term.
Keywords:nitrogen deposition  biochar  plantation  soil organic carbon fractions  Cunninghamia lanceolata
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