CAJ | 학술논문

为揭示生物炭对烟苗及根系生长的影响，采用盆栽试验，在土壤中添加不同用量的生物炭，并测定了不同处理条件下烟苗的干物质积累量，氮、磷、钾含量（质量分数），以及烟苗根系形态及根系活力。结果表明：与对照相比，当生物炭施用量为1%时，对烟苗的促生效应最佳，烟苗干物质积累量增加了28.5%；当生物炭施用量超过4%时，烟苗生长反而受到抑制，干物质积累量下降了7.1%。同时，随着生物炭施用量的增加，烟苗根系体积、根系面积及根总长均呈现出增加趋势。当生物炭施用量为3%时根总长最大，增加了10.5%；当生物炭施用量为4%时根系体积最大，增加了238.7%。3%生物炭用量对烟苗生长具有促进作用，而更高用量生物炭则抑制了烟苗的生长。
위게시생물탄대연묘급근계생장적영향，채용분재시험，재토양중첨가불동용량적생물탄，병측정료불동처리조건하연묘적간물질적루량，담、린、갑함량（질량분수），이급연묘근계형태급근계활력。결과표명：여대조상비，당생물탄시용량위1%시，대연묘적촉생효응최가，연묘간물질적루량증가료28.5%；당생물탄시용량초과4%시，연묘생장반이수도억제，간물질적루량하강료7.1%。동시，수착생물탄시용량적증가，연묘근계체적、근계면적급근총장균정현출증가추세。당생물탄시용량위3%시근총장최대，증가료10.5%；당생물탄시용량위4%시근계체적최대，증가료238.7%。3%생물탄용량대연묘생장구유촉진작용，이경고용량생물탄칙억제료연묘적생장。
A pot experiment was carried out to study the influences of biochar on the growth of tobacco seedling and root system. Biochars of different rates were added into soil, and the dry matter accumulation and nitrogen, phosphorus, potassium contents in tobacco seedling and the morphology and vitality of seedling root system at different biochar rates were determined. The results showed that comparing with the control, the dry matter accumulation of tobacco seedlings increased by 28.5% at a biochar application rate of 1%, however it decreased by about 7.1% and tobacco seedling growth was inhibited when the application rate was above 4%. With the increase of biochar application rate, the volume, area of the root system and total length of roots raised. At the application rate of 3%, the total length of roots reached its maximum and increased by 10.5%. At the application rate of 4%, the volume of roots reached its maximum and increased by 238.7%. Under the conditions of this experiment, the biochar application rate of 3%promoted the growth of tobacco seedlings, while over that application rate, the growth of tobacco seedlings would be inhibited.