Leaf Nitrogen Content, Uptake and Morpho-Physiological Traits and Their Relationship with Productivity in Cowpea (Vigna unguiculata L.) Genotypes
Loading...
Date
2015-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Science, Dharwad
Abstract
A field experiment was conducted at Main Agricultural Research Station (MARS), University of Agricultural Sciences, Dharwad, during kharif, 2014 to study the leaf nitrogen content, uptake and morpho-physiological traits and their relation with productivity of cowpea genotypes. The experiment consisted of 10 different cowpea genotypes (DCS-47-1, DC-15, DC-16, V118 × GL, CPD-84, PGCP-2, CP-43, CP-22, CP-26, C-152 (local check) and the experiment was laid out in RCBD design with three replications. The results revealed that, among the genotypes DC-15 recorded significantly higher plant height, number of branches, total dry matter accumulation and partitioning, number of nodules per plant, chlorophyll content (SPAD readings), photosynthetic rate (Ps) and stomatal conductance (Gs). The genotype, CP-26 recorded significantly maximum number of days for all the phenological parameters like, days to flower initiation, days to 50% flowering, pod initiation, physiological maturityas compared to all other genotypes. Total dry matter production(TDM) and its distribution, biochemical parameters (nitrogen content and uptake in leaves at 50 per cent flowering and pod initiation stages) and growth parameters (leaf area, LAI, LAD, BMD, SLA, SLW,AGR, CGR, RGR and NAR) were recorded significantly higher value in DC-15 as compared to other genotypes. While, seed protein content was recorded maximum in CPD-84. Similarly, the genotype DC-15 recorded maximum seed yield as compared to other genotypes. The increase in yield is due to significant increase yield attributes viz., seed yield per plant, number of seeds per pod, number of pods per plant and pod weight per plant and these traits were positively correlated with yield.
Description
Keywords
null