Publication Date
1985
Location
Kyoto Japan
Description
Interception and absorption of sunlight, seasonal changes of productive structure, productivity, and standing crops of the Phragmites communisgrassland which was the pure stand in the delta of Nakdong river in Korea, were investigated in 1977,1982 and 1983.
The lighfpenetrating through the stratified canopies is decreased in sigmoid pattern. The cumulative leaf area of a definite space in a certain plant is the same as the growth of leaf area of the canopy at that time. When the leaf area grows according to the logistic equation, vertical accumulation of leaf area in a grassland is given by the general dynamic equation. Light interception at the maximum growth rate of leaf area is given by this equation(l). The developed productive structure of live materials was occupied by the upper part of photosynthetic system and the under part of nonphotosynthetic system. Therefore, the pattern of the light interception was changed from a sigmoid pattern to an exponential pattern. P. communis contributed to the standing crops of live materials of above ground parts was in excess of 3,660g/m2 throughout the growing season. The peak standing crop ,3 ,399. 0g/m2, was reached in September. The net productivity of this grassland was in excess of 142g/m2 for one growing season except for Octber. Annual net productions of the reed grassland in 1977, 1982 and 1983 were 4.10, 4.25 and 4.47kg/m2/year, respectively. The maximum leaf area indices were 10.3,11.0 and 10.4, respectively. These data were very high in the natural grassland.
Citation
Kang, H K. and Chang, N K., "Light Interception, Productive Structure and Production of the Phragmites comminis Grassland in the Delta of Nakdong River in Korea" (1985). IGC Proceedings (1985-2023). 2.
(URL: https://uknowledge.uky.edu/igc/1985/ses16/2)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Light Interception, Productive Structure and Production of the Phragmites comminis Grassland in the Delta of Nakdong River in Korea
Kyoto Japan
Interception and absorption of sunlight, seasonal changes of productive structure, productivity, and standing crops of the Phragmites communisgrassland which was the pure stand in the delta of Nakdong river in Korea, were investigated in 1977,1982 and 1983.
The lighfpenetrating through the stratified canopies is decreased in sigmoid pattern. The cumulative leaf area of a definite space in a certain plant is the same as the growth of leaf area of the canopy at that time. When the leaf area grows according to the logistic equation, vertical accumulation of leaf area in a grassland is given by the general dynamic equation. Light interception at the maximum growth rate of leaf area is given by this equation(l). The developed productive structure of live materials was occupied by the upper part of photosynthetic system and the under part of nonphotosynthetic system. Therefore, the pattern of the light interception was changed from a sigmoid pattern to an exponential pattern. P. communis contributed to the standing crops of live materials of above ground parts was in excess of 3,660g/m2 throughout the growing season. The peak standing crop ,3 ,399. 0g/m2, was reached in September. The net productivity of this grassland was in excess of 142g/m2 for one growing season except for Octber. Annual net productions of the reed grassland in 1977, 1982 and 1983 were 4.10, 4.25 and 4.47kg/m2/year, respectively. The maximum leaf area indices were 10.3,11.0 and 10.4, respectively. These data were very high in the natural grassland.
