Effect of Ratios of Nitrogen Forms on Microbiological Characteristics of Albic Soil Amended with Corn Stalk
WANG Nan
XU Junping
ZHAO Zhiyi
LI Yuxi
YAO Kai
WANG Shuai
Abstract：The effect of different ratios of two N forms(NH+4-N∶NO-3-N were designed for 4∶1,1∶1,1∶4 respectively) on the enzyme activities and microbial biomass carbon(C) and nitrogen(N) contents of albic soil amended with corn stalk was studied,so as to select the best ratio for optimizing the soil microbiological characteristics.The results showed that with the increase of incubation time,the urease,alkaline phosphatase,sucrase,protease,catalase activities and microbial biomass C,N contents of albic soil amended with corn stalk treated by the three ratios of NH+4-N to NO-3-N increased first and then declined.Compared with 0 d,after incubation for 180 d,except the catalase activity got a significantly promotion,the other enzyme activities and microbial biomass C,N contents decreased at different degrees.Compared with the others treatments,the treatment with NH+4-N∶NO-3-N of 1∶1 had a cushioning effect on the declining trend of urease,alkaline phosphatase,sucrase,protease activities and microbial biomass C,N contents to some extent,simultaneously had a stronger promotion on the catalase activity.Compared the results of 0 d and 180 d,the treatment with NH+4-N∶NO-3-N of 1∶4 that NO-3-N dominated in the N supply had an strong inhibitory effect on the urease,sucrase activities and microbial biomass N content of albic soil amended with corn stalk,while the treatment with NH+4-N∶NO-3-N of 4∶1 that NH+4-N dominated in the N supply had an strong inhibitory effect on the alkaline phosphatase,protease,catalase activities and microbial biomass C content.
Keywords：nitrogen formsalbic soilmicrobiological characteristicsenzyme activitymicrobial biomass
Publication Date：2017-06-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 56-61 )