烟草科技2017，Vol.50Issue(6)：26-32,7.
烟秆生物炭对烤烟根系生长的影响及其作用机理
Effects of tobacco stalk biochar on root growth of flue-cured tobacco and its action mechanism
摘要
Abstract
To reveal the mechanism of tobacco stalk biochar on root growth of flue-cured tobacco, field experiments were carried out at three biochar application rates (0, 1, 10 and 50 t/ha) and the root growth of flue-cured tobacco and soil physicochemical properties were measured. The results showed that biochar promoted the root growth of flue-cured tobacco, both the volume and dry weight of roots increased at an early stage. Via increasing biochar application rate, root bleeding intensity of flue-cured tobacco increased, however, the active absorption area (AAA), percentage of AAA and dry weight of root increased first and then decreased. The optimal morphological and physiological characteristics of roots and the highest yield of flue-cured tobacco were obtained at the biochar application rate of 10 t/ha. With the increase of biochar application rate, the mass water content, capillary capacity, gas phase ratio and available phosphorus and potassium contents in soil increased. However, the alkaline nitrogen content and catalase activity increased first and then decreased. Comparing with the control, the available potassium content in soil increased by 11.0%-382.3% under the biochar treatment.关键词
烤烟/烟秆/生物炭/土壤/理化性质/根系/产量Key words
Flue-cured tobacco/Tobacco stalk/Biochar/Soil/Physicochemical property/Root/Yield分类
农业科技引用本文复制引用
陈懿,陈伟,高维常,程建中,林叶春,潘文杰..烟秆生物炭对烤烟根系生长的影响及其作用机理[J].烟草科技,2017,50(6):26-32,7.基金项目
贵州省科技重大专项"优质烤烟根系培育技术模式研究与示范"(黔科合重大专项字[2014]6015-2) （黔科合重大专项字[2014]6015-2）
贵州省农业攻关项目"生物炭对贵州烟区土壤及烟叶中有害物的调控研究与示范"(黔科合 NY[2013]3019) （黔科合 NY[2013]3019）
贵州省烟草公司科技项目"烟秆炭基产品开发及其对烟地保育技术研究与应用"(201614) （201614）
贵州省烟草公司毕节市公司科技项目"烟秆炭基产品对烟地保育的机制研究"(201652050024139). （201652050024139）
