Publication Date
1985
Location
Kyoto Japan
Description
The understanding of nutrient transformation in soil must be based on a knowledge of soil microbial activities. In order to clarify the relationship between fertilization and microbial activity, some microbial and biochemical characteristics were studied in some soils collected from the grassland under different fertilization practices, which caused marked changes in the uppermost part of grassland soil. The experimental plot was located in the northern part of Hokkaido, and the characteristics examined included bacterial and fungal numbers obtained by the plate methods, hyphal length, and the decomposing activities of urea, fructose, glucose, starch and protein. Simple correlation analysis indicated that the bacterial counts were significantly correlated with soil pH, and an other factor which appeared to be responsible for bacterial count was the vegetation. That is, legume might increased bacterial numbers because it would provide better substrate than grasses. Biochemical activities except for the protein decomposing activity were parallel to bacterial counts. Soil pH, however, has less influence on hyphal length. That is likely due to the ability of fungi as a group which can grow in a low pH condition. Fungal spore count obtained by the plate count method, however, increased as soil pH decreased. The dominant fungal genera in the low pH plots were Trichoderma and Penicillium, while those in the high pH plot were more divergent. We concluded the factors which govern the microbial activities in the intensive pasture are soil pH and vegetation.
Citation
Higashida, S and Nishimune, A, "A Microbial and Biochemical Study of Grassland Under the Different Fertilization Practices" (1985). IGC Proceedings (1985-2023). 120.
(URL: https://uknowledge.uky.edu/igc/1985/ses6/120)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
A Microbial and Biochemical Study of Grassland Under the Different Fertilization Practices
Kyoto Japan
The understanding of nutrient transformation in soil must be based on a knowledge of soil microbial activities. In order to clarify the relationship between fertilization and microbial activity, some microbial and biochemical characteristics were studied in some soils collected from the grassland under different fertilization practices, which caused marked changes in the uppermost part of grassland soil. The experimental plot was located in the northern part of Hokkaido, and the characteristics examined included bacterial and fungal numbers obtained by the plate methods, hyphal length, and the decomposing activities of urea, fructose, glucose, starch and protein. Simple correlation analysis indicated that the bacterial counts were significantly correlated with soil pH, and an other factor which appeared to be responsible for bacterial count was the vegetation. That is, legume might increased bacterial numbers because it would provide better substrate than grasses. Biochemical activities except for the protein decomposing activity were parallel to bacterial counts. Soil pH, however, has less influence on hyphal length. That is likely due to the ability of fungi as a group which can grow in a low pH condition. Fungal spore count obtained by the plate count method, however, increased as soil pH decreased. The dominant fungal genera in the low pH plots were Trichoderma and Penicillium, while those in the high pH plot were more divergent. We concluded the factors which govern the microbial activities in the intensive pasture are soil pH and vegetation.
