施用生物炭对中国农田土壤有机碳含量的影响--基于Meta分析  

Effects of Biochar Application on Soil Organic Carbon Content in Farmland:A Meta-analysis

作　　者：张楠海 叶旭 刘高祥 崔楠 张梦洁 王强[1] 牛军凯 贾志宽[1,2,3] 任小龙 张鹏[1,2,3] ZHANG Nan-hai;YE Xu;LIU Gao-xiang;CUI Nan;ZHANG Meng-jie;WANG Qiang;NIU Jun-kai;JIA Zhi-kuan;REN Xiao-long;ZHANG Peng(College of Agronomy,Northwest A&F University,Yangling 712100,China;Key Laboratory of Crop Physiology,Ecology and Farming in Northwest Loess Plateau,Ministry of Agriculture and Rural Affairs,Yangling 712100,China;Institute of Water-saving Agriculture in Arid Areas of China(IWSA),Northwest A&F University,Yangling 712100,China;College of Agriculture,Gansu Agricultural University,Lanzhou 730070,China;College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China)

机构地区：[1]西北农林科技大学农学院,陕西杨凌712100 [2]农业农村部西北黄土高原作物生理生态与耕作重点实验室,陕西杨凌712100 [3]西北农林科技大学中国旱区节水农业研究院,陕西杨凌712100 [4]甘肃农业大学农学院,甘肃兰州730070 [5]青海大学农牧学院,青海西宁810016

出　　处：《土壤通报》2024年第2期532-542,共11页Chinese Journal of Soil Science

基　　金：国家重点研发计划项目(2021YFE0101302);国家自然科学基金项目(31901475)资助。

摘　　要：探明不同生产条件下施加生物炭对中国农田土壤有机碳含量的影响,以期为科学施用生物炭和提高农田土壤碳库储量提供理论参考。研究基于已公开发表的施加生物炭对于我国农田土壤有机碳含量影响的相关文献,以不施加生物炭为对照组,施加生物炭为试验组,使用Meta分析方法定量整合分析了不同自然条件、土壤性质、农田管理措施等因素下生物炭施用对农田土壤有机碳含量的影响。研究表明,施加生物炭显著提高了农田土壤有机碳含量(P <0.05),平均提高33.98%;当年均温在10~15℃时,土壤有机碳含量增幅最大,可显著提高48.05%(P <0.05),且不同年均温之间有极显著差异(P <0.01),年均降雨量对生物炭提高土壤有机碳的效应也有显著影响(P <0.05);在壤土上施加生物炭对土壤有机碳的提升效果较其他质地土壤极显著提高26.66%(P <0.01);随着施用生物炭pH的提高,其对土壤有机碳的增加效应越大,当生物炭pH> 10时平均可显著提高49.20%(P <0.05);在生物炭施用下,轮作相比于连作,极显著提高了土壤有机碳含量,提高率为28.42%(P <0.01);生物炭配施氮肥对土壤有机碳含量的提高主要取决于生物炭施用量而不是氮肥施用量。此外,试验农田土壤pH、耕地类型、生物炭制备来源和C/N比等因素均对生物炭施用下土壤有机碳含量有不同程度影响。在年均温10~15℃的壤土地区,采用轮作种植方式,施加pH> 10的生物炭对农田土壤的固碳效果最佳。[Objective]The aims were to explore the effects of biochar application under different production conditions on soil organic carbon(SOC)in farmland of China,in order to provide a theoretical reference for scientific application of biochar and effective improvement of soil carbon storage in farmland.[Method]Based on the published literature on the effect of biochar application on SOC content in farmland in China,this study took no biochar application as the control group and biochar application as the experimental group.Meta-analysis was used to quantitatively analyze the effects of biochar application on SOC content in farmland under different natural conditions,soil properties and farmland management measures.[Result]The results showed that the application of biochar could significantly increase SOC content by 33.98%(P<0.05)in average.The SOC was significant increased by 48.05%(P<0.05)while the mean annual temperature was 10-15℃,and showed the highly significant(P<0.01)difference among different mean annual temperatures.The mean annual precipitation also had a significant effect on the effect of biochar on SOC(P<0.05).Applying biochar on loam soil could significantly increase the SOC content by 26.66%(P<0.01)compared with other texture soils.The increase effects on SOC content was increased with the biochar pH increase,and significant increased by 49.20%(P<0.05)in average with biochar pH>10.Compared with continuous cropping,the crop rotation could highly significant increased SOC by 28.42%(P<0.01)in average under biochar application.The SOC content not significant increased with the nitrogen fertilizer rate,but significant increased with the biochar application rate.In addition,the soil pH of experimental farmland type,source of biochar preparation,and C/N ratio of biochar also have different effects on the SOC content under biochar application.[Conclusion]Notably,biochar application could significant increase SOC content based suitable cropping system(rotation),soil types(loam),mean annual temperature(10-15�

关 键 词：生物炭 土壤有机碳 农田土壤 META分析 

分 类 号：S158[农业科学—土壤学]