The dynamical changes of soil pH

organic matter

alkali-hydrolyzableN

quick-acting phosphorus

quick-acting kalium

and microbial biomass carbon and nitrogen in the soil of different fertilization treatments were monitored at the long-term located brown earth experiment site in Shengyang agricultural university within six growth periods of corn.The results indicated that long-term fertilizations made pH decline.The fertilization treatments of M4 and M4N2P1 make organic matter increase and N4 treatment make it decrease.The alkali-hydrolyzable-N in the soil of fertilizations is higher than CK.The trends of organic matter and alkali-hydrolyzable-N in corn growth periods remain decreasing.Organic matters and the combination of organic and inorganic matters can enhance quickacting phosphorus and quick-acting kalium in a large extent.The quick-acting phosphorus under M4 treatment reaches the climax in heading.Meanwhile

N4 treatment makes the average microbial biomass carbon and nitrogen decrease.While

M4 and M4N2P1 treatment makes them increase.The microbial biomass carbon and nitrogen in soil of fertilizations has very high content in the heading of corn.