烟草科技2017，Vol.50Issue(12)：29-37,9.
基于盆栽试验的施用烟秆生物炭对植烟土壤呼吸速率的影响
Effects of tobacco stalk biochar on respiration rate of tobacco-planting soil based on pot experiment
摘要
Abstract
To explore the effect of tobacco stalk biochar on soil respiration rate, a pot experiment was conducted to detect the respiration rate, temperature and moisture content of soil at the growth stage of tobacco. The results showed that under different fertilization treatments using the biochar, the respiration rate of tobacco-plant soil changed significantly with the development and growth of tobacco with the lowest and highest respiration rate appeared on the 60th day and the 90th day after tobacco seedling transplanting, respectively. The respiration rate of soil treated with biochar was higher than that without biochar or with conventional fertilization. The variation of soil respiration rate was well characterized by a double-factor model of soil moisture content and temperature. Temperature sensitivity coefficients of soil respiration rate of different treatments were from 2.36 to 9.41. The application of biochar reduced the sensitivity of soil respiration rate to soil temperature. Soil respiration rate of four treatments(conventional fertilization+12 g/kg biochar, conventional fertilization+24 g/kg biochar, conventional fertilization-5% pure nitrogen+12 g/kg biochar and conventional fertilization-10% pure nitrogen+24 g/kg biochar)significantly negatively correlated to cation exchange capacity(CEC). Soil pH, organic matter(except for the control, no fertilization), alkaline hydrolysis nitrogen, available phosphorus and available potassium negatively correlated to soil respiration rate. Therefore, proper biochar could increase soil respiration rate.关键词
烤烟/生物炭/土壤呼吸速率/温度/含水率Key words
Flue-cured tobacco/Biochar/Soil respiration rate/Temperature/Moisture content分类
农业科技引用本文复制引用
于晓娜,周涵君,张晓帆,李志鹏,付仲毅,秦燚鹤,马静,叶协锋..基于盆栽试验的施用烟秆生物炭对植烟土壤呼吸速率的影响[J].烟草科技,2017,50(12):29-37,9.基金项目
烟草行业烟草栽培重点实验室资助项目"植烟土壤肥力培育及提高肥料利用率技术研究"(30800665) （30800665）
河南省烟草公司资助项目"秸秆生物质炭对土壤-烤烟养分高效协同利用机制研究"(HYKJ201301). （HYKJ201301）
