| 王雪松,郑粉莉,王婧,焦健宇,赵苗苗.气候变化对谷子生育期土壤碳氮磷转化相关酶活性的影响[J].农业环境科学学报,2021,40(7):1591-1600. |
| 气候变化对谷子生育期土壤碳氮磷转化相关酶活性的影响 |
| Effects of elevated CO2 and warming on soil carbon, nitrogen and phosphorus transformation-linked enzymes activities at different millet growth stages |
| 投稿时间：2020-12-15 |
| DOI：10.11654/jaes.2020-1442 |
| 中文关键词: 气候变化 CO2浓度升高 增温 谷子 生育期 土壤酶 |
| 英文关键词: climate change elevated CO2 warming millet growth stage soil enzyme |
| 基金项目:中国科学院国际合作局国际伙伴计划项目（161461KYSB20170013） |
| 作者 | 单位 | E-mail | | 王雪松 | 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100 | | | 郑粉莉 | 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100
中国科学院水利部水土保持研究所, 陕西 杨凌 712100 | flzh@ms.iswc.ac.cn | | 王婧 | 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100 | | | 焦健宇 | 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100 | | | 赵苗苗 | 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100 | |
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| 中文摘要: |
| 为研究气候变化对作物不同生育期土壤碳氮磷循环相关酶活性的影响，采用盆栽控制试验，通过人工气候室控制环境CO2浓度和温度，设计对照（CO2浓度为400 μmol·mol-1、环境温度为22℃）、CO2浓度升高（CO2浓度升至700 μmol·mol-1、环境温度22℃）、CO2浓度和温度升高（CO2浓度升至700 μmol·mol-1、环境温度升至26℃）3种气候情景和2种水分条件（充分供水和轻度干旱），研究谷子（Setaria italica）开花期、开花后10 d、灌浆期和成熟期4个生育期土壤β-葡糖苷酶（βG）、β-N-乙酰葡糖苷酶（NAG）、亮氨酸氨肽酶（LAP）和碱性磷酸单脂酶（ALP）活性对CO2浓度和温度升高的响应。结果表明： CO2浓度升至700 μmol·mol-1时对土壤LAP酶有显著的抑制作用，其对土壤NAG酶活性仅在充分供水条件下有促进作用，而对ALP酶活性仅在轻度干旱条件下有促进作用。增温4℃显著抑制土壤βG和ALP酶活性，其对土壤NAG酶活性的影响与土壤水分条件有关。生育期与CO2浓度升高的交互作用对4种土壤酶活性均具有显著影响，生育期与增温的交互作用在充分供水条件下仅对土壤βG酶活性有显著影响，而在轻度干旱条件下其对土壤βG和NAG酶活性有显著影响。研究表明，在谷子生育不同阶段，CO2浓度升高、增温和干旱对土壤碳氮磷转化相关酶活性的影响不尽相同。 |
| 英文摘要: |
| Pot control experiments were adopted to study the responses of these soil transformation-linked enzyme activities to elevated CO2 and warming at different growth stages of millet（Setaria italica）. Three artificial climate chambers were used to control the ambient CO2 concentration and temperature. Three climate scenarios, control（400 μmol·mol-1 CO2 concentration and 22 ℃ ambient temperature, CK）, CO2 concentration elevation（CO2 concentration 700 μmol·mol-1 and 22 ℃ ambient temperature, EC）, and CO2 concentration and temperature elevation（CO2 concentration 700 μmol·mol-1 and temperature 26 ℃）, were designed. Each climate scenario covered two water conditions（adequate water supply, i.e., 70% field capacity and mild drought, i.e., 50% field capacity）. Activities of soil β-glucosidase （βG）, β-N-acetyl glucosidase（NAG）, leucine aminopeptidase（LAP）, and alkaline phosphatase（ALP）were measured at four millet growth periods： anthesis, 10 d after anthesis, grain-filling stage, and maturity stage, respectively. The results showed that an increase in CO2 concentration from 400 μmol·mol-1 to 700 μmol·mol-1 significantly reduced LAP activity, but it increased NAG activity under adequate water supply and significantly reduced ALP activity under mild drought conditions. A temperature increase of 4 ℃ significantly inhibited soil βG and ALP activities, and the effect of the temperature increase on soil NAG activity was related to the soil water conditions. The interaction between elevated CO2 concentration and millet growth period had significant impacts on these four kinds of soil enzyme activities. The interaction between temperature increase and millet growth period had a significant effect on βG activity under the adequate water supply, and it significantly affected βG and NAG activities under the mild drought condition. In conclusion, at different millet growth stages, the impacts of elevated CO2 concentration, temperature increase, and mild drought on soil carbon, nitrogen, and phosphorus transformation-linked enzymes have different trends. |
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