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.