CAJ | 학술논문

采用盆栽土培的方法，研究了不同土壤类型外源添加不同浓度的镉（ Cd，0，1．5，3．0，6．0 mg／kg）对烤烟生长发育以及烤烟根际土壤微生物量（细菌、真菌、放线菌）及酶活性（脲酶、转化酶、酸性磷酸酶）的影响。结果表明：在试验的范围内，外源Cd对烤烟生长和土壤微生物数量及酶活性的影响程度与土壤类型及添加Cd浓度有关。随着添加Cd浓度增加，烤烟的生长受到抑制，在添加Cd浓度为6．0 mg／kg时，各部位的干物质降低最多，特别是红壤中烤烟根系受抑制更明显。土类和添加Cd浓度对微生物数量的影响顺序为放线菌＞真菌＞细菌。土类对酶活性的影响顺序为脲酶＞转化酶＞酸性磷酸酶，添加Cd浓度对酶活性的影响顺序为酸性磷酸酶＞转化酶＞脲酶。
채용분재토배적방법，연구료불동토양류형외원첨가불동농도적력（ Cd，0，1．5，3．0，6．0 mg／kg）대고연생장발육이급고연근제토양미생물량（세균、진균、방선균）급매활성（뇨매、전화매、산성린산매）적영향。결과표명：재시험적범위내，외원Cd대고연생장화토양미생물수량급매활성적영향정도여토양류형급첨가Cd농도유관。수착첨가Cd농도증가，고연적생장수도억제，재첨가Cd농도위6．0 mg／kg시，각부위적간물질강저최다，특별시홍양중고연근계수억제경명현。토류화첨가Cd농도대미생물수량적영향순서위방선균＞진균＞세균。토류대매활성적영향순서위뇨매＞전화매＞산성린산매，첨가Cd농도대매활성적영향순서위산성린산매＞전화매＞뇨매。
Pot experiment was conducted to study the effect of exogenous cadmium on flue-cured tobacco bio-mass and soil biota indexes in different soil .The results showed that there was significantly relation between the dose of exogenous cadmium and tobacco biomass ,microbe quantity and enzyme activity in rhizosphere soil .With the in-creasing of cadmium ,the growth of tobacco was suppressed more seriously ,and under the treatment of 6.0 mg/kg Cd,the dry weight was least ,the inhibition of Cd was more seriously in red soil ,especially.Moreover,it was found that inhibition of cadmium on quantity was in the order of actinomycete >fungi>bacteria ,the effect on enzyme ac-tivity was in the order of urease >invertase>acid phosphatase ,the effect on enzyme activity was in the order of acid phosphatase>invertase>urease.