Long-term effects of different fertilization on calcareous soil microbial P and phosphatase

Abstract

Abstract: In this study,determination of soil microbial Pand phosphatase activity of long term different fertilization treatments:no fertilizer,chemical fertilizers,corn straw(content of low,middle and high)+chemical fertilizers,animal manure and chemical fertilizers in combination,fallow treatment. The results showed that fertilization treatments increased soil microbial P,similarly,phosphatase activity were increasea by the fertilization of organic manure mixed with chemical fertilizers together.Calcareous soil microbial Pwas closely related with total P,labileorganic Pand rapidly available phosphorus,this suggests the utilization rate of fixed Pin calcareous soil could be improved by improving soil microbial P.

Key words: Urea, Soil, pH, Active Al

CLC Number:

XIE Linhua, LÜ Jialong, ZHANG Yiping. Long-term effects of different fertilization on calcareous soil microbial P and phosphatase[J]. cje, 2004, (4): 65-68.

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