EFFECT OF FOLIAR APPLICATION OF POTASSIUM AND MAGNESIUM ON GROWTH AND YIELD OF SUMMER MUNGBEAN (Vigna radiata (L.) Wilczek) UNDER WATER STRESS CONDITIONS
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Date
2011
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PUNJAB AGRICULTURAL UNIVERSITY
Abstract
The present investigation was undertaken with the objective to understand the
phenological response of summer mungbean genotypes SML 1082 and SML 1168 to
moisture stress at vegetative, flower initiation and pod initiation stages and also to understand
the influence of potassium and magnesium on various morphological, physiological and
biochemical parameters. The experiment was carried out on plants grown under field
conditions. Various morpho-physiological parameters viz. plant height, number of leaves
plant-1, leaf area plant-1, LAI, LAD, SLW, RWC, CGR and RGR decreased with moisture
stress whereas root length increased under moisture stress. All the yield contributing
parameters viz. number of clusters plant-1 and number of pods cluster-1 decreased maximum
with moisture stress given at flower initiation stage whereas number of seeds pod-1, pod
length, 100 seed weight, total yield plant-1 decreased maximum when moisture stress was
given at pod initiation stage. Biochemical parameters viz. total chlorophyll content, Hill
reaction activity, carotenoid content, total soluble proteins and nitrogen content decreased
with moisture stress while proline content and total soluble sugars increased under moisture
stress given at any stage. Foliar spray of 2%KNO3 and 50ppmMgSO4 ameliorated the effect
of moisture stress in both the genotypes SML 1082 and SML 1168. 2%KNO3 was more
effective as compared to 50ppmMgSO4 in most of the parameters. On the basis of above
mentioned observations SML 1082 was more sensitive to moisture stress as compared to
SML 1168.
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Keywords
developmental stages, planting, sowing, yields, biological development, spacing, fertilizers, chrysanthemum, inorganic acid salts, harvesting