Publication Date
1985
Location
Kyoto Japan
Description
Three varieties of napier grasses, A146, 7001 and 7007 were propagated with two-node stem cuttings in 50 cm x 100 cm population density in the field on 13th of Sept. 1983, to compare the regrowth ability of these grasses under the dry and cold season in southern Taiwan and to select a better one for recommendation in this area. Some parameters of growth analysis, the Leaf Area Index (LAI), Leaf Area Ratio (LAR), Net Assimilate Rate (NAR), Crop Growth Rate (CGR) and Relative Growth Rate (RGR) of the grasses were traced every 2 weeks after the cutting. LAI increased with the growing days in the regrowth process. On the contrary, the LAR was hightest in the early regrowth stage and declined as growth stage advanced. It was thought that the regrowth of the napier grass was the enlargement of leaf area in the early stage and was accompanied by the dry mater accumulation in the later stage. Change of NAR, CGR and RGR took the same course, raised from the early growth stage to the harvest, with the exception of a sharp decline in them on 13th March 1984, which was due to the sudden drop of the air temperature, the decrease in these parameters was greater in varieties 7001 and 7007 than in A146. It was suggested that variety A146 is more resistant to the lower temperature in regrowth process under the dry and cold season. It was recommendated that A146 is a better variety under dry, cold season and 70 days regrowing period is an appropriate time for the harvest in the winter growing season.
Citation
Wang, Yeong-Chyn, "Regrowth Ability of Napiergrass (Pennisteum purpureum Schamach) in the Dry, Cold Season in Taiwan" (1985). IGC Proceedings (1985-2023). 9.
(URL: https://uknowledge.uky.edu/igc/1985/ses14/9)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Regrowth Ability of Napiergrass (Pennisteum purpureum Schamach) in the Dry, Cold Season in Taiwan
Kyoto Japan
Three varieties of napier grasses, A146, 7001 and 7007 were propagated with two-node stem cuttings in 50 cm x 100 cm population density in the field on 13th of Sept. 1983, to compare the regrowth ability of these grasses under the dry and cold season in southern Taiwan and to select a better one for recommendation in this area. Some parameters of growth analysis, the Leaf Area Index (LAI), Leaf Area Ratio (LAR), Net Assimilate Rate (NAR), Crop Growth Rate (CGR) and Relative Growth Rate (RGR) of the grasses were traced every 2 weeks after the cutting. LAI increased with the growing days in the regrowth process. On the contrary, the LAR was hightest in the early regrowth stage and declined as growth stage advanced. It was thought that the regrowth of the napier grass was the enlargement of leaf area in the early stage and was accompanied by the dry mater accumulation in the later stage. Change of NAR, CGR and RGR took the same course, raised from the early growth stage to the harvest, with the exception of a sharp decline in them on 13th March 1984, which was due to the sudden drop of the air temperature, the decrease in these parameters was greater in varieties 7001 and 7007 than in A146. It was suggested that variety A146 is more resistant to the lower temperature in regrowth process under the dry and cold season. It was recommendated that A146 is a better variety under dry, cold season and 70 days regrowing period is an appropriate time for the harvest in the winter growing season.
