摘要
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。
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 potassium-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 descended,reaching to the highest（53.36×104cell/g of dry soil）at squaring stage.The amount of root-zone soil nitrobacteria 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 amount 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 different in different flue-cured tobacco genotypes.
出处
《华北农学报》
CSCD
北大核心
2013年第2期209-213,共5页
Acta Agriculturae Boreali-Sinica
基金
河南省烟草公司项目(HYKJ200904)
关键词
烤烟
基因型
土壤微生物
土壤酶活性
Flue-cured tobacco
Genotype
Soil microorganism
Soil enzymes activity
