长期施肥条件下黄壤有机碳矿化对温度变化的响应

卢韦,王小利,邬磊,徐虎,李渝,刘彦伶

中国农学通报. 2019, 35(25): 101-107

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中国农学通报 ›› 2019, Vol. 35 ›› Issue (25) : 101-107. DOI: 10.11924/j.issn.1000-6850.casb19030080
资源 环境 生态 土壤 气象

长期施肥条件下黄壤有机碳矿化对温度变化的响应

  • 卢韦1, 王小利1, 邬磊2, 徐虎2, 李渝3, 刘彦伶3
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Organic Carbon Mineralization of Yellow Soil Under Long-term Fertilization: Response to Soil Temperature Change

  • 李渝 and
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摘要

【研究目的】为了揭示长期施肥黄壤旱地有机碳矿化对温度的响应特征【方法】运用碱液吸收法,室内模拟不同温度(10℃、20℃)培养试验研究不施肥(CK)、施化肥(NPK)、单施有机肥(M)和有机无机配施(MNPK)对土壤有机碳矿化的影响。【结果】结果表明,在80天的培养中累积矿化量均为M>MNPK>CK>NPK,与长期施肥土壤SOC的含量变化趋势一致;C0/SOC(潜在矿化量/有机碳)在不同温度下均为NPK最高,除了M与MNPK未达到显著性差异,其余处理均达到显著性差异(p<0.05);Q10范围是2.92~4.18。长期施有机肥(M、MNPK)的土壤的矿化受温度的影响显著高于长期单施无机肥和未施肥的土壤。【结论】有机无机配施(MNPK)、单施有机肥(M)的土壤对温度的响应特征显著高于单施化肥(NPK)和不施肥(CK)(p<0.05),揭示了长期施有机肥土壤有机碳对温度的响应特征。

Abstract

The paper aims to reveal the response characteristics of organic carbon mineralization of yellow soil under long-term fertilization to soil temperature. We studied the effects of yellow soil subjected to long-term fertilization [without fertilization (CK), chemical fertilizer (NPK), single application of organic fertilizer (M) and organic fertilizer combined with inorganic fertilizer (MNPK)] at 10℃ and 20℃ on organic carbon mineralization, by using NaOH absorption method. The results showed that: the order of 80-day cumulative mineralization amounts at different temperatures was M>MNPK>CK>NPK, corresponding to the trend of SOC content in soil under long-term fertilization; C0/SOC (potential mineralization/organic carbon) with NPK was the highest at different temperatures, the other treatments had significant differences (P<0.05) except M and MNPK; Q10 ranged from 2.92 to 4.18; the soil mineralization under long-term organic fertilizer application (M, MNPK) was affected by temperature significantly more than that under long-term single inorganic fertilizer application and unfertilized soil; the response of soil to temperature was more sensitive under the application of organic fertilizer combined with inorganic fertilizer (MNPK), and organic fertilizer (M) compared with that under single application of chemical fertilizer (NPK) and without fertilization (CK) (P<0.05), revealing the response characteristics of organic carbon to temperature in soil with long-term application of organic fertilizer.

关键词

长期施肥;矿化特征;累积矿化量;温度敏感性;周转速率;黄壤旱地;

Key words

Key words: long-term fertilization; mineralization characteristics; cumulative mineralized amount; temperature sensitivity;turn-around rate;yellow soil;

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卢韦,王小利,邬磊,徐虎,李渝,刘彦伶. 长期施肥条件下黄壤有机碳矿化对温度变化的响应. 中国农学通报. 2019, 35(25): 101-107 https://doi.org/10.11924/j.issn.1000-6850.casb19030080
李渝 and. Organic Carbon Mineralization of Yellow Soil Under Long-term Fertilization: Response to Soil Temperature Change. Chinese Agricultural Science Bulletin. 2019, 35(25): 101-107 https://doi.org/10.11924/j.issn.1000-6850.casb19030080

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