The patterns of seasonal variations on the microbial biomass, the multi-ecological factors, and the integrated effects of the factors on Puccinellia tenuiflora soil microbes were studied in the decomposer microbes subsystem.

Current circumstances and mechanisms were reviewed in detail about application of the gypsum in acid soil and alkali soil.

Effects of soil water content and soil sodicity on soil shearing strength;

Effects of soil sodicity,gypsum application,and filtration disposal on hydraulic conductivity under irrigation with domestic effluent water;

Effects of soil sodicity and gypsum application on dynamical behavior of heavy metal elements under effluent irrigation were studied by means of soil column leaching method in laboratory.

Research on the amount of desulfurized gypsum from the coal-burning power plant applied to improve the alkalized soil for paddy rice

The total nitrogen content,alkali-soluble nitrogen content,ammonification intensity,nitrogen fixation intensity,urease activity, protinase activity,nitrite reductase activity and nitrate reductase activity increased in alkalized soil in which Puccinellia tenuiflora was grown(Pt soil) compared with alkali spot soil and the differences depended on the number of years for which it was grown.

The field experiment that improving alkalized soil by desulfurized gypsum to plant sweet sorghum in Xidatan of Ningxia indicated that, applying desulfurized gypsum could effectively reduce the alkalization degree, M- alkalinity and pH value of the soil, sig- nificantly enhance the seeding rate and yield.

Four soluble inorganic salts were used to study their influences upon cadmium forms in the alkaline soil and contents of cadmium absorbed by plants in the experiment.

The effect of planting Puccinellia tenuiflora on the content of nitrogen,phosphorous in saline alkali soil;