土壤乙烯产生和氧化的研究进展

Ethylene production and oxidation in soils: a review

乙烯作为植物生长调节素及挥发性有机气体影响着植物生长和大气环境质量。有关土壤源乙烯产生和氧化特征,已发表的文献偏重实验室过程研究,很少涉及野外观测实验;陆地生态系统中土壤源乙烯行为有可能影响到植物生长及区域大气环境,大气环境变化(如水热状况和氮/酸沉降等)势必引起陆地土壤理化和生物学特性发生改变,进而影响土壤源乙烯产生和氧化过程。根据以前出版的文献,就土壤理化性质及外源碳氮施加、土壤微生物和重金属行为等对影响土壤乙烯产生和氧化作了详细综述,并简要阐述根际土壤乙烯产生和氧化以及不同土地利用方式对土壤乙烯产生和氧化的影响。指出应加强大气氮/酸沉降对典型林地土壤乙烯产生和氧化的影响机制以及不同土地利用方式下土壤乙烯产生和氧化的原位观测等方面的研究;同时也应关注不同成熟林型及森林演替不同阶段土壤理化和生物学特性跟乙烯产生和氧化的关联,明确土壤微生物(如细菌和真菌等)对此的相对贡献程度,利于丰富陆地土壤乙烯产生和氧化等有关科学认识,寻求适宜措施减少陆地土壤源乙烯产生潜势。

Ethylene （C2H4） as a phytohormone and one of volatile organic compounds can affect plant growth and the quality of atmospheric environment. I.iterature published shows that there are plenty of laboratory-based processes studies in the field of soil ethylene production and oxidation. However, field measures are still limited so far. The behavior of soil borne ethylene in terrestrial ecosystems may affect plant growth and atmospheric environment. The variations of atmospheric environment such as status of precipitation and temperature, and nitrogen and acid depositions, may induce a change in the soil physical and chemical and biological properties, thereby affecting the process of soil borne ethylene production and oxidation. This paper fully summarizes, based on previous publications, the effects of soil physical and chemical properties, C and N amendments, soil microorganisms and heavy metals on soil C2H4 production and oxidation. It also concisely describes the C2H4 production and oxidation in the rhizosphere soil and under different land uses. It has been proposed that some scientific researches should be intensified in the future such as the effects of acid and nitrogen depositions on the C2H4 production and oxidation in typical forest soils, and in situ measures of soil Celia production and oxidation under different land uses. The interaction should attract attention between the ethylene production and oxidation in soils, and soil physical and chemical and biological properties under different mature forests and during forest successions, and the relative contribution of soil microorganisms to the C2H4 production and oxidation is involved. These associated studies can improve human＇s scientific understanding about the ethylene production and oxidation in terrestrial soils, and are beneficial to obtaining effective methods which can reduce production potentials of ethylene in terrestrial soils.