Comparative studies on the chlorophyll content, growth, N uptake and yield of groundnut varieties of different habit groups

Abstract

The field experiments conducted on the comparative physiological studies of the erect (Spanish) and runner (Virginia) habit group groundnut varietlcs showed thal, the runner cultivars shuwed higher chlorrrphyll contents in Ieavcs, shnwed higher crop growth, produced more leaf. stem and nodule biomass, gave higher pod and haulm yield and accumulated more nrlrogen in different parts of plant, than thal of erect type groundnut varieties. The chlorophyll content in leaves was lowrut nl 4 wrekc uher emerpencc (WAE) which increased to highest at R WAE. Similarly the crop growth ratc was low till 6 WAE, which incrrnscd sharply afterward and was maximum in between 7-13 WAE. Thc groundnut crop showed highus! dry matter accumulation in their leaves and stems at 14 and 15 WAE, during dry *ason and I I and 12 WAE during wet season, in erect and runner varieties, respectively. The root nodulation sraned after 3 WAE and showed its maximum biomass at I I and 12 WAE during dry season and 9 and 10 WAE during wet season in erect and runner vnrictles, respectively. Thc N uptab by lcavcs and atcml however was maximum at 13 and 10 WAE during dry and wet seasons, respectively. Amrrng the erect lype 1L 24 and 00 2 and among the runners GAIIG 10 showed more chlorophyll contents in their leaves, produced higher biomasi; in loaf, stem, root and nodule, showed higher pod and heulm yields and N uptake than other varieties. The dry season crop look more fimc fur its maturily, accumulated more nltronen and brna~ccan lghcrpud anJ ndm ~ezdlin an uet m,on :rop ~hccropg ro~rlr;a re (gim',da)i of prounan~r. r;r~etrert rom '.I3 NA~h.ke tcr. Has more d~rlnue~i redron than that dUr.ng dr searun. b~tI.h c CYmJ.dl~(pe er do! dr) molter production (urn2J d) I yrorndn~t~ d \ 1 \ m1 1ar during both the-seasons