Effects of Planting Densities on Microorganism Population and Soil Enzyme Activity in the Rhizosphere of Wheat

doi:10.7668/hbnxb.2008.03.037

Abstract

Abstract: The dynamics of the number of microbes in rhizosphere of wheat with different planting densities was studied in this paper. The results indicated that the amount of rhizosphere soil bacteria was attained the higher value in jointing and heading stage.The maximum population of actinomyces and fungi was observed in anthesis stage.The change of bacterium population in the rhizosphere showed a single-peaked curve with the increase in planting density.The maximum populations were observed at planting densities of 150×104/ha or 225×104/ha.The population of actinomyces and the activity of urease and protease had the same trend to that of the bacteria.However,the fungus population decreased with the increase of planting density.The correlation between yield and the microorganism population and enzyme activity in soil showed that the increase in microorganism population would benefit the wheat grain yield.

Key words: Winter wheat, Planting density, Microbe, soil enzyme activity

CLC Number:

S512.1+1

MA Dong-yun, GUO Tian-cai, ZHA Fei-na, YUE Yan-jun, SONG Xiao. Effects of Planting Densities on Microorganism Population and Soil Enzyme Activity in the Rhizosphere of Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(3): 154-157. doi: 10.7668/hbnxb.2008.03.037.

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