Publication Date
1997
Description
We investigated seasonal variations of soil enzyme activities, soil inorganic N, soil microbial biomass N (BN) and soil total sugar C (TSC) during March to December in cattle-grazed pasture in Japan (Andisols). Dehydrogenase activity had three peaks in a year, on the other hand, phosphomonoesterase activity increased from spring (April) up to summer (August) but then gradually decreased toward winter. BN also showed a seasonal variation, which gradually increased from April to August, but in the end of August once decreased rapidly because of soil becoming dry. Soil inorganic N had three peaks which appeared after the appearance of dehydrogenase activityí-s peaks and which resulted from Nfertilization or cattle pasturage. TSC showed a seasonal variation which didní-t show any change from April to early in August (about 3000mg/kg) but then sharply decreased down to about 1500mg/kg in the end of August. In this study, these labile soil organic matter fractions and the amount of soil inorganic N in cattle-grazed pasture showed seasonal variations.
Citation
Murata, T; Tanaka, H; and Kurokawa, Y, "Seasonal Variations of Labile Soil Organic Carbon and Nitrogen Fertility in Grassland Soil in Tokyo, Japan" (2024). IGC Proceedings (1997-2023). 27.
https://uknowledge.uky.edu/igc/1997/session10/27
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Seasonal Variations of Labile Soil Organic Carbon and Nitrogen Fertility in Grassland Soil in Tokyo, Japan
We investigated seasonal variations of soil enzyme activities, soil inorganic N, soil microbial biomass N (BN) and soil total sugar C (TSC) during March to December in cattle-grazed pasture in Japan (Andisols). Dehydrogenase activity had three peaks in a year, on the other hand, phosphomonoesterase activity increased from spring (April) up to summer (August) but then gradually decreased toward winter. BN also showed a seasonal variation, which gradually increased from April to August, but in the end of August once decreased rapidly because of soil becoming dry. Soil inorganic N had three peaks which appeared after the appearance of dehydrogenase activityí-s peaks and which resulted from Nfertilization or cattle pasturage. TSC showed a seasonal variation which didní-t show any change from April to early in August (about 3000mg/kg) but then sharply decreased down to about 1500mg/kg in the end of August. In this study, these labile soil organic matter fractions and the amount of soil inorganic N in cattle-grazed pasture showed seasonal variations.
