CAJ | 학술논문

　　为了研究不同基因型烤烟根区土壤微生物种群数量和酶活性差异，以中烟100、NC297和KRK26为材料，研究了其根区土壤主要微生物种群数量和酶活性的变化规律。结果表明：3个基因型烤烟根区土壤细菌、真菌、放线菌、解磷菌数量随生育期变化规律基本一致，但现蕾期和采收结束均表现为KRK26根区的土壤真菌和解磷菌数量明显高于其他2个品种。根区土壤解钾菌、硝化细菌和纤维素分解菌变化规律和数量在烤烟基因型间差异明显，中烟100土壤解钾菌数量呈倒“V”型变化，现蕾期最高（53．36×104个/g），明显高于其他2个品种；NC297团棵期根区土壤硝化细菌数量最高，之后逐渐降低，而中烟100表现为先升高后下降，现蕾期最高；整个生育期中烟100根区土壤纤维素分解菌数量明显高于KRK26和NC297。 NC297根区土壤过氧化氢酶活性在整个生育期均低于KRK26和中烟100，根区土壤转化酶活性则表现为中烟100明显高于KRK26和NC297。
　　위료연구불동기인형고연근구토양미생물충군수량화매활성차이，이중연100、NC297화KRK26위재료，연구료기근구토양주요미생물충군수량화매활성적변화규률。결과표명：3개기인형고연근구토양세균、진균、방선균、해린균수량수생육기변화규률기본일치，단현뢰기화채수결속균표현위KRK26근구적토양진균화해린균수량명현고우기타2개품충。근구토양해갑균、초화세균화섬유소분해균변화규률화수량재고연기인형간차이명현，중연100토양해갑균수량정도“V”형변화，현뢰기최고（53．36×104개/g），명현고우기타2개품충；NC297단과기근구토양초화세균수량최고，지후축점강저，이중연100표현위선승고후하강，현뢰기최고；정개생육기중연100근구토양섬유소분해균수량명현고우KRK26화NC297。 NC297근구토양과양화경매활성재정개생육기균저우KRK26화중연100，근구토양전화매활성칙표현위중연100명현고우KRK26화NC297。
Zhongyan 100,NC297 and KRK26 were selected as test materials to study the soil microorganism and enzyme activity in root-zone of different flue-cured tobacco genotypes.The results showed that the amounts of root-zone soil microphyte,epiphyte,actinomyces and phosphate-dissolving bacteria had the similar changes along with the growth stages,but the amounts of epiphyte and phosphate-dissolving bacteria at squaring and harvest stages were significantly higher in root-zone of KRK26 than in Zhongyan 100 and NC297.The amounts of root-zone soil po-tassium-dissolving bacteria,nitrobacteria and celluose-decomposing bacteria changed differently in different flue-cured tobacco genotypes.The amount of potassoium-dissolving bacteria in Zhongyan 100 ascended first,and then de-scended,reaching to the highest(53.36 ×10 4 cell/g of dry soil)at squaring stage.The amount of root-zone soil nitro-bacteria in NC297 reached to the highest at rosette stage,and then decreased gradually,while in Zhongyan 100,it ascended first,and then descended,reaching to the highest at squaring stage .During the whole growth period,the a-mount of root-zone soil celluose-decomposing bacteria was higher in Zhongyan 100 than in KRK26 and NC297,and the root-zone soil catalase activity was the lowest in NC297,while the root-zone soil sucrase activity was the highest in Zhongyan 100.It was concluded that the root-zone soil microorganism amounts and enzyme activities were differ-ent in different flue-cured tobacco genotypes.