摘要
气候变暖及粮食安全是保证人类可持续发展的重要课题。生物炭具有较高的稳定性、较高碳含量等特点,能增加土壤碳储量,提高土壤物理及化学性质,提高农田产出,能应对高温胁迫及土壤退化双重压力,具有一举多赢的生态环境效益,在缓解温室效应及粮食危机方面展现出巨大的潜力。综合前人研究成果,分析了生物炭固碳减排潜力及农田效应影响因素(包括:生物炭原料、制备温度、施用量、土壤类型等)。综合固碳减排及提高产出两方面因素,提出了较合适的生物炭施用标准,即300—700℃制备的农林废弃物生物炭,且施用量不超过5%。对生物炭固碳减排及田间效应领域未来的研究方向进行了展望。
Global warming and food security have been significant issues in the field of sustainable development. Several studies have shown that biochar amendments markedly contribute to mitigating global warming and food crises and produce beneficial win-win effects. This is mainly because of the high stability and carbon content of biochar,which can enhance the storage of soil carbon and the physical and chemical properties of soil,consequently resulting in increased yields. Therefore,the objective of the present work was to examine previous studies on the efficacy of biochar as a soil amendment and to analyze the intrinsic factors that affect soil carbon reserve and agronomic benefits（ including： feedstock, pyrolysis temperature,application rate and soil type）. On the basis of the results obtained,a suitable application criterion was proposed,which has shown potential efficiency in carbon sequestration as well as agronomic benefits： biochar derived from pyrolysis of biomass from forestry and harvest residues at a temperature of 300-700℃,with a relatively low dosage of no more than 5%. Finally,we propose future research directions for a better understanding of the effects of biochar on carbon sequestration potential,soil fertility and crop growth.
出处
《生态学报》
CAS
CSCD
北大核心
2018年第2期393-404,共12页
Acta Ecologica Sinica
基金
四川省科技支撑计划项目(2015SZ0007
2016NZ0039)
关键词
生物炭
固碳减排潜力
农田效应
biochar
carbon sequestration potential
agronomic effect
