移栽营养土对烟苗生长及干物质积累的影响

摘要

In order to select the suitable soil for transplanting tobacco in Hunan to bacco growing areas,pot experiment was conducted to study the effects of different transplanting nutrient soils on the growth and dry matter accumulation of tobacco.The results indicated that the treatments of transplanting with nutrition soils were better than the control group.For the underground part,transplanting nutrient soil could effectively improve the root activity of tobacco plants,and increase root volume,root surface area,total root length,as well as the number of root tips and the number of root branches.For the aboveground part,transplanting nutrient soil could remarkably improve the plant height,stem girth,leaf number and maximum leaf area,and could simultaneously significantly increase the dry matter accumulation.By comparison,peat + mushroom residue + saw dust + straw powder + biochar + root promoting nutrient solution was the most effective treatment,and the effect of sole application of nutrient solution was limited.In conclusion,transplanting with nutrition soil could effectively promote the growth and dry matter accumulation of tobacco.%为筛选适合湖南烟区稻田烤烟移栽营养土,采用盆栽试验研究了不同移栽营养土对烟株根系和地上部生长及干物质积累的影响.结果表明:移栽营养土处理均好于对照,对于地下部分,移栽营养土能有效提高烟株根系活力,增大根系体积、根系表面积和总根长,同时还能增加根尖数和根系分支数;对于地上部分,移栽营养土能有效提高烟株株高、茎围、叶片数和最大叶面积,同时还能显著增加干物质积累量.其中以草炭+菇渣+锯木屑+秸秆粉+生物炭+火土灰+促根营养液处理效果最为显著,而单施营养液效果有限.说明营养土移栽能有效促进烟株地下部和地上部的生长及干物质积累.