Theme 01: Ecophysiology of Grasslands
Description
Mombaçagrass grown in pots was evaluated regarding leaf appearance, elongation and senescence rates; leaf area indices, photosynthetcly active radiation (PAR) interception and the growth indices: leaf area ratio (LAR), net assimilation rate (NAR) and relative growth rate (RGR). Three growths were considered: seminal growth and regrowth after harvest take on the 16th and 37th day of the seminal growth.
The seminal growth exhibited the highest values for leaf appearance, elongation and senescence rates as compared to aftermath growths. LAI rose linearly from the 20th to the 77th day of the seminal growth, as well as during the aftermath growths. Maximum LAI was around 5.0 by the 70th day of growth. PAR interception did not exceed 95%. Mean values for NAR, RGR and LAR decreased asymptotically as the grass aged. For a given age, highest values of LAR, NAR and RGR were observed for the seminal growth. Lower and negative values were observed for NAR and RGR during the first 3 day regrowth periods.
Included in
Morphogenesis and Growth Analysis of Mombaçagrass (Panicum maximum) during Establishment and Regrowth
Mombaçagrass grown in pots was evaluated regarding leaf appearance, elongation and senescence rates; leaf area indices, photosynthetcly active radiation (PAR) interception and the growth indices: leaf area ratio (LAR), net assimilation rate (NAR) and relative growth rate (RGR). Three growths were considered: seminal growth and regrowth after harvest take on the 16th and 37th day of the seminal growth.
The seminal growth exhibited the highest values for leaf appearance, elongation and senescence rates as compared to aftermath growths. LAI rose linearly from the 20th to the 77th day of the seminal growth, as well as during the aftermath growths. Maximum LAI was around 5.0 by the 70th day of growth. PAR interception did not exceed 95%. Mean values for NAR, RGR and LAR decreased asymptotically as the grass aged. For a given age, highest values of LAR, NAR and RGR were observed for the seminal growth. Lower and negative values were observed for NAR and RGR during the first 3 day regrowth periods.
