摘要
为揭示烟秆生物炭对烤烟根系生长的作用机理,通过田间试验研究了烟秆生物炭不同施用量(0、1、10、50 t/hm^2)对烤烟根系生长和土壤理化性质的影响。结果表明:土壤中施用生物炭可促进烤烟根系前期生长,根系体积和干质量均有提高。随着生物炭用量的增加,烤烟根系伤流强度呈递增趋势,根系活跃吸收面积、活跃吸收面积百分比及干质量呈现出先增加后减少的趋势。10 t/hm^2烟秆生物炭处理的烤烟根系形态生理特征指标最优、烟叶产量最高。随着生物炭用量的增加,土壤质量含水率、毛管持水量、气相率、有效磷及速效钾含量(质量分数)逐渐增加,土壤碱解氮含量和过氧化氢酶活性先增加后降低。与对照比较,生物炭处理的土壤速效钾含量增幅为11.0%~382.3%。
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.
出处
《烟草科技》
EI
CAS
CSCD
北大核心
2017年第6期26-32,共7页
Tobacco Science & Technology
基金
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)
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)
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)
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)
关键词
烤烟
烟秆
生物炭
土壤
理化性质
根系
产量
Flue-cured tobacco
Tobacco stalk
Biochar
Soil
Physicochemical property
Root
Yield
作者简介
陈懿（1982-）,硕士,副研究员,主要从事烤烟栽培与生理生态研究.E-mail：59012819@qq.com
通讯作者： 潘文杰,E-mail：wenjiepan@163.com
