草业科学2025，Vol.42Issue(5)：1101-1117,17.DOI:10.11829/j.issn.1001-0629.2023-0574
温度对甘肃兴隆山植物群落不同演替阶段土壤氮素氨化、硝化特征的影响
Effects of temperature change on soil ammonification and nitrification characteristics of communities at different succession stages in Xinglong Mountain,Gansu Province
摘要
Abstract
Soil from different succession stages(grassland,shrub forest,Betula platyphylla forest,Picea wilsonii-B.platyphylla forest,and P.wilsonii forest)and an indoor constant-temperature aerobic culture method were used to clarify the response of the soil nitrogen cycle to temperature in different succession stages of terrestrial ecosystems.The characteristics of soil ammonification and nitrification under different temperatures(15,25,and 35 ℃)were studied.The results showed the following.1)Soil depth significantly affected the ammonification rate,cumulative ammonification,nitrification rate,and cumulative nitrification(P＜0.01).With an increase in soil depth,the ammonification rate,cumulative ammonification amount,nitrification rate,and cumulative nitrification amount of soil nitrogen in different succession stages showed a decreasing trend,among which those in the 0-20 cm soil layer was the largest.2)Successive communities significantly affected ammonification and nitrification rates(P＜0.01).With positive succession,the ammonification rate of soil nitrogen in succession stages other than the 0-20 cm soil layer of the grassland community first decreased,then increased,and then decreased.The ammonification rate of grassland was the highest.The nitrification rate of soil nitrogen at different succession stages first increased and then decreased,and the nitrification rate of P.wilsonii-B.platyphylla forest was the highest.3)Temperature significantly affected ammonification rate,cumulative ammonification amount,nitrification rate,and cumulative nitrification amount(P＜0.01).Except for the 0-20 cm soil layer of shrub forest and P.wilsonii-B.platyphylla forest community,the 20-40 cm soil layer of Picea wilsonii forest,Betula platyphylla forest,P.wilsonii-B.platyphylla forest community,and the 40-60 cm soil layer of grassland community,the soil nitrogen ammonification rate and the cumulative ammonification amount of soil nitrogen in different succession stages increased with the increase of soil temperature(15～35 ℃),and the maximum level(154.03 mg·kg-1)was detected at 35 ℃.In contrast,the soil nitrogen nitrification rate and cumulative nitrification amount in different succession stages increased first and then decreased with the increase of temperature.The maximum level(529.10 mg·kg-1)was detected at 25 ℃.4)Soil physical and chemical properties(TN,field capacity,NH4+-N,and soil bulk density)at different succession stages had significant effects on soil nitrogen ammonification and nitrification rates at 15 and 25 ℃(P＜0.05).The results of this study provide a theoretical basis for dynamic changes in soil nitrogen supply capacity and ecosystem management in this region.关键词
温度/演替阶段/土壤氮素氨化特征/土壤氮素硝化特征/甘肃兴隆山Key words
temperature/succession stage/soil nitrogen ammonification characteristics/soil nitrogen nitrification characteristics/Xinglong Mountain,Gansu Province引用本文复制引用
唐维春,刘小娥,苏世平,王昊,马彦东,唐庆童..温度对甘肃兴隆山植物群落不同演替阶段土壤氮素氨化、硝化特征的影响[J].草业科学,2025,42(5):1101-1117,17.基金项目
甘肃农业大学科技创新基金——青年导师扶持基金项目(GAU-QDFC-2022-17) （GAU-QDFC-2022-17）
干旱荒漠区生态修复过程中林木对"水-温"协同胁迫的响应机制与试验示范研究项目(23YFFA0066) （23YFFA0066）
基于外源ABA作用的红砂抗旱生理及分子响应机制研究项目(32060335) （32060335）
甘肃省自然科学基金项目(21JR7RA814) （21JR7RA814）
