水土保持学报2017，Vol.31Issue(2)：287-292,6.DOI:10.13870/j.cnki.stbcxb.2017.02.047
生物质炭对烤烟旺长期根系发育及光合特性的影响
Effects of Biochar on Root Development and Leaf Photosynthetic Characteristics of Flue-cured Tobacco in the Vigorous Growing Period
摘要
Abstract
Roots are important for the nutrition absorption of flue-cured tobacco.In this study,by changing the amount of biochar in the soil,the effects of biochar on root system development,leaf photosynthetic characteristics,and physiological parameters of the coordinated growth of the aboveground and underground parts of flue-cured tabacco were investigated.A field experiment was carried out in 2015 and 2016,and there were six treatments,i.e.CK,T1,T2,T3,T4,and T5.Compared with the conventional fertilization,the nitrogen fertilizer application rate of each treatment was decreased by 40％.In the key growth period of flue-cured tobacco,root system growth characteristics and leaf photosynthetic characteristics were determined.The results showed that biochar application at 2 400 kg/hm2 increased root vigor by 177.8％,total root area by 91.35％,the total root tip number by 100.9％,leaf area by 73.29％,chlorophyll relative value by 57.68％,net photosynthetic rate by 77.32％,and leaf area coefficient by 23.48％,respectively.Biochar could effectively promote the growth and development of the root of flue-cured tobacco,optimize root physiological parameters,and improve leaf photosynthetic physiological and leaf development parameters through the improvement of root development,with the improvement effects of biochar reaching a peak in T4.关键词
烤烟/旺长期/生物质炭/根系活力/根系形态/叶片生理特征Key words
flue-cured tobacco/vigorous growing period/biochar/root vigor/root morphology/leaf physiological characteristics分类
农业科技引用本文复制引用
王欢欢,任天宝,张志浩,元野,王博,匡岗,刘德玉,刘国顺..生物质炭对烤烟旺长期根系发育及光合特性的影响[J].水土保持学报,2017,31(2):287-292,6.基金项目
黑龙江省烟草行业科技开发项目“牡丹江调味型烟叶植烟土壤碳库修复关键技术研究与应用”(黑烟科[2015]59号) （黑烟科[2015]59号）
