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- W2393075492 abstract "Changes of soil non exchangeable nitrogen during the aerobic incubation and waterlogged incubation and their effects on the quantity of mineralization of soil organic nitrogen and microbial biomass nitrogen were studied. The results showed that NH 4 +-N produced during waterlogged incubation could be fixed by clay mineral, leading to increase of non exchangeable nitrogen, from 30.0 μg·g -1 to 142.4 μg·g -1 , and so that the mineralization quantity of organic nitrogen is lower than the actual quantity. After the long term interval leaching aerobic incubation, among the 20 soil samples examined, 4 soil samples' non exchangeable nitrogen increased, and the other 16 soil samples' decreased. Compared with the beginning of incubation the non exchangeable nitrogen of 20 soil samples decreased by 28.8 μg·g -1 on average ( P 0.01), and thus the quantity of mineralization of organic nitrogen was higher than the actual value. During the determination of soil microbial biomass nitrogen, because the killed micro rganisms in fumigation were intensely mineralized during waterlogged incubation compared with the soil that was not fumigated, and the former produced an large quantity of NH 4 +-N, and resulted the increase of non exchangeable nitrogen significantly, the non exchangeable nitrogen of 15 soil samples increased 22.2 μg·g -1 on average ( P 0.01), corresponding to 88.7 μg·g -1 microbial biomass nitrogen. To calculate the microbial biomass nitrogen by only using the N Flush of the K 2SO 4 extracting NH 4 +-N in fumigated and nonfumigated soil, the result was lower than the actual value." @default.
- W2393075492 created "2016-06-24" @default.
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- W2393075492 date "2003-01-01" @default.
- W2393075492 modified "2023-09-26" @default.
- W2393075492 title "Change of Non-exchangeable Ammonium Nitrogen During Procession of Soil Organic Nitrogen Mineralization" @default.
- W2393075492 hasPublicationYear "2003" @default.
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