Effects of Different Halophytes on Soil Microflora and Enzyme Activities of Saline-alkali Soil

In the pot experiment, seven varieties of halophytes were grown in saline-alkali soil to investigate the responses of microflora and soil enzymes in the rhizosphere. The results showed that compared to the control, the population of bacterial colony（84.8%-95.6%）, actinomycetes colony（12.0%-14.5%） and fungi colony（0.5%-1.1%） increased significantly（P＜0.05）. The population of ammonia bacteria, aerobic cellulose decomposition bacteria in the soil of Vicia sativa L.（201.99% and 395.49%）, Medicago sativa（152.43% and 319.90%） and Sesbania cannabina（Retz.） Pori（193.14% and 396.08%） were higher significantly than that of Panicum virgatum L.（49% and 60%）, Sorghum bicolor（L.） Moench（99% and 210%）, Amaranthus hypochondriacus L.（75% and 36%） and Aneurotepidimu chinense（75% and 77%）（P＜0.05）. However, Sorghum bicolor（L.） Moench was evidently higher than Panicum virgatum L., Amaranthus hypochondriacus L. and Aneurotepidimu chinense（P＜0.05） in the soil. The population of ammonia bacteria and aerobic cellulose-decomposing bacteria was significantly correlated with the five enzymes（P＜0.05）, which could improve the microenvironment in saline-alkali soil to accelerate the element cycling and promote the sustainable development of agriculture through cultivating Medicago sativa, Vicia sativa L., Sesbania cannabina（Retz.） Pori and Sorghum bicolor（L.） Moench.