烟草科技Issue(1)：8-13,30,7.DOI:10.16135/j.issn1002-0861.20160102
不同施肥条件下烤烟生长期土壤呼吸变化及其影响因素
Variations and factors influencing soil respiration in flue-cured tobacco fields under different fertilization treatments
摘要
Abstract
In order to investigate the variations and factors influencing soil respiration rate in tobacco field during tobacco growing, a field experiment was conducted with three fertilization treatments, including no fertilizer (CK), inorganic fertilizer (NPK) and inorganic plus organic fertilizer (NPKOM). Soil respiration rate was determined by closed chamber-infrared method, and the effects of soil temperature, soil moisture content and tobacco root biomass on soil respiration rate were analyzed. The results showed that: 1) The variation of soil respiration rate presented an M-shape curve during tobacco growing under all three treatments, with two peaks appearing on the 81th and 107th days after tobacco seedling transplanting respectively. Comparing with CK, soil respiration rate was significantly increased by NPK and NPKOM treatments 14 days after tobacco seedling transplanting, and there was no significant difference between NPK and NPKOM treatments. 2) The variation of soil respiration rate was affected by soil temperature and tobacco root biomass during tobacco growing. Soil respiration rate positively correlated to soil temperature to a significant degree, the contribution rates of soil temperature at the depth of 5 and 10 cm to the variation of soil respiration rate were 60.4%-67.6%and 67.9%-76.1%, respectively. Both fertilization and soil depth increased the temperature sensitivity (Q10) of soil respiration. 3) Soil respiration rate increased first then decreased with the increase of tobacco root biomass during the whole tobacco growing period in field, however soil temperature influenced soil respiration rate more significantly at later growing stage.关键词
烤烟/施肥/烟田/土壤呼吸/土壤温度/根系生物量Key words
Flue-cured tobacco/Fertilization/Tobacco field/Soil respiration/Soil temperature/Root biomass分类
农业科技引用本文复制引用
戴衍晨,王瑞,申国明,高林,张继旭,李志刚,张继光..不同施肥条件下烤烟生长期土壤呼吸变化及其影响因素[J].烟草科技,2016,(1):8-13,30,7.基金项目
中国烟草总公司重点科技项目“‘清江源’生态富硒特色烟叶生产关键技术研究与应用”（110201202014）；国家自然科学基金项目“不同种植模式烟草根际土壤微生物群落结构及其生物功能稳定性研究”(41201291）。 （）
