青枯病抗性不同的番茄土壤细菌生理群的数量变化

对青枯病抗性不同的番茄品种根际细菌生理群数量变化进行了研究.结果表明,番茄根际细菌种群和数量的变化随品种抗性、生育期不同和季节的变化而变化,其中氨化细菌的数量与番茄青枯病抗性呈正相关;根际细菌中氨化细菌、硝化细菌、好气纤维素分解细菌、固氮细菌和反硫化细菌等数量均表现为夏季高于冬季,而厌气纤维素分解细菌和硫化细菌的数量则表现为冬季高于夏季.

Studies on Populations of Bacterial Physiological Groups in Rhizosphere of Tomato with Different Resistance to Ralstonia solanacearum

The investigations were conducted on bacterial populations from rhizosphere soils of tomato with different resistance to Ralstonia solanacearum.The results showed that rhizosphere bacterial communities and populations in tomato varied with the changes of different resistant cultivars, the growth stages of tomato and seasons.The amount of ammoniation bacteria in the rhizosphere are positively correlated with the resistance R.solanacearum.The average quantities of the ammoniation bacteria, nitrifiers bacteria, aerobic cellulose-deconposer, nitrogen-fixing bacteria and desulphate bacteria were higher in the summer than that in the winter, but the quantities of the anaerobic cellulose-deconposer and the sulphate bacteria was higher in the winter than that in the summer.