CAJ | 학술논문

采用盆栽试验,模拟农田土壤除草剂残留环境,研究异噁草松残留下,生物炭对土壤微生物群落数量的影响,阐明生物炭及其结构特性对土壤微域环境的改善作用.结果表明:土壤中异噁草松残留在0~0.72 mg·kg-1对土壤真菌和放线菌影响趋势一致,随作物生育进程延长具有刺激增加的作用,尤其是高残留处理,但初期对细菌具有较强的抑制作用,至甜菜生长到第50 d才恢复正常;加炭后,土壤真菌数量降低,但与对照差异不显著;异噁草松土壤残留低于0.24 mg·kg-1,加炭后土壤放线菌数量高于对照未施炭处理;异噁草松残留低于0.12 mg·kg-1,加炭后细菌数量先增加后降低;生物炭为"深层孔洞"结构,含有C、O、S等多种元素.试验结果表明,土壤中一定浓度的异噁草松残留,对土壤真菌、放线菌有刺激增加作用,加入生物炭后,能够缓解除草剂高残留对细菌的抑制作用.
채용분재시험,모의농전토양제초제잔류배경,연구이오초송잔류하,생물탄대토양미생물군락수량적영향,천명생물탄급기결구특성대토양미역배경적개선작용.결과표명:토양중이오초송잔류재0~0.72 mg·kg-1대토양진균화방선균영향추세일치,수작물생육진정연장구유자격증가적작용,우기시고잔류처리,단초기대세균구유교강적억제작용,지첨채생장도제50 d재회복정상;가탄후,토양진균수량강저,단여대조차이불현저;이오초송토양잔류저우0.24 mg·kg-1,가탄후토양방선균수량고우대조미시탄처리;이오초송잔류저우0.12 mg·kg-1,가탄후세균수량선증가후강저;생물탄위"심층공동"결구,함유C、O、S등다충원소.시험결과표명,토양중일정농도적이오초송잔류,대토양진균、방선균유자격증가작용,가입생물탄후,능구완해제초제고잔류대세균적억제작용.
Effects of biological carbon(bio-char)on soil microbial community were studied by pot experiments simulating long residual her-bicide residues in soil environment, which clarifed the improvement of biochar and its structural properties on soil microenvironment. The re-sults showed that fungi and actinomycetes had the same effect tendency within 0~0.72 mg·kg-1 in clomazone residue which increased the role of stimulation with crop growth process prolonged, especially in high residue treatment, but strong inhibitory effect on bacteria community was occured early which returned to normal until sugar beet growth to fiftieth day. Soil fungi community decreased with bio-char adding, but had no significant difference with the control. When clomazone residue in soil was below 0.24 mg·kg-1, soil actinomycetes community was higher than control without bio-char, bacteria increased first and then reduced after adding carbon as below 0.12 mg·kg-1. Biochar was'deep hole'structure containing C, O, S and other elements. The results showed that a certain concentration clomazone residue in soil would stim-ulate soil fungi and actinomycetes to grow. After adding the biochar, the inhibition effect of high herbicides residual on bacterial would be al-leviated.