%0 Journal Article
%T Weed biology and growth analysis of Celosia argentea L., a weed associated with groundnut and finger millet crops in southern India
%A Gogga M. Ravindra
%A Shankarappa Sridhara
%A Gubbi K.Girijesh
%A Hooradahalli V.Nanjappa
%J Communications in Biometry and Crop Science
%D 2008
%I Warsaw Agricultural University
%X An experiment was conducted to study the weed biology of Celosia argentea L., during the rainy season of 2007 at Navile, Shimoga, India (14¡ã1¡¯N, 75¡ã42¡¯E and 650 m AMSL). The results showed that more leaves (44.8 ¡À 1.17) and branches (18.2 ¡À 0.52) and taller plants (107.5 ¡À 3.40) were present at plant maturity of C. argentea. The plant took 5.87 ¡À 0.25 d, 6.00 ¡À 0.49 d and 61.10 ¡À 1.76 d for germination, branching and maturity respectively. At maturity highest dry matter (DM) accumulation was observed in the stem (9.81 ¡À 0.22 g plant-1) compared to other plant parts. Higher absolute growth rate (AGR) (0.51 ¡À 0.01 g plant-1 d-1), net assimilation rate (NAR) (0.03 ¡À 0.00 g cm-2 d-1), relative growth rate (RGR) (0.07 ¡À 0.00 g g-1 d-1) and crop growth rate (CGR) (g m-2d-1) were observed between 30 and 50 days after sowing (DAS). Leaf area duration (LAD) of 2.70 ¡À 0.036 d was observed between 50-70 DAS with a total LAD of 4.83 d. At maturity C. argentea had a leaf area of 36.25 ¡À 0.79 cm2 plant-1. The heat use efficiency of Celosia was 0.03 g GDD-1. Dry matter accumulation in C. argentea complied with different mathematical models such as the logistic, Richards and Gompertz curves
%K weed biology
%K growth analysis
%K Celosia argentea L.
%U http://agrobiol.sggw.waw.pl/~cbcs/pobierz.php?plik=CBCS_3_2_3.pdf