PHYSIOLOGICAL APPROACHES FOR DROUGHT MITIGATION IN GROUNDNUT (Arachis hypogeaL.) CROP (Accession No. T06271)
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Date
2017-05-17
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DBSKKV DAPOLI
Abstract
A field experiment was conducted at agricultural research botany farm, College of Agriculture, Dapoli to study the physiological approaches for drought mitigation in groundnut (Arachis hypogea L.) crop during Rabi 2016-17 seasons. Stress mitigating compound at different concentration were applied through foliar spray after 24 DAS and spraying were imposed immediately after irrigation for stressed plots and observations were taken before every irrigation. The experiment consisted of 12 treatment laid out in randomized block design with three replications. The experiment consisted of 12 treatment comprising KCl (1.0%), triacontanol (2ml/l), Methanol (2%), Alachlor (20ppm), Atrazine (100ppm), Kaolin (6%), CCC (100ppm), Nitrobenzene (20ppm) and salicylic acid (500ppm) and Water were imposed at 24 DAS in stressed treatments and applied at leaves (foliar spray).
Among the treatments, control (regular watering at 7 days interval) and foliar application of triacontanol (2ml/l) recorded significantly higher in morphological, physiological, biochemical parameters and in yield and yield components over all the treatments, whereas, stress plot (T2)recorded lower values for these parameters as compared to other treatments. After control, foliar application of triacontanol recorded high values for morphological, physiological, biochemical parameters and in yield and yield components over all the treatments.
Application of stress mitigating compound have been found effective in increasing these parameter. The LAD, relative water content, found to be maximum in control and increased bythe foliar application of triacontanol (2ml/l). The increased rate of photosynthesis and chlorophyll content has been achieved by the foliar application Triacontanol (2ml/l). Chlorophyll stability index was found to be increased by the foliar application of Triacontanol (2ml/l). The transpirational loss is reduced by application of Kaolin (6%).Days required for maturity was on time for control and foliar application of triacontanol (2ml/l).Proline content at different stages indicated that control had significantly lower proline content as compared to all other treatments whereas stressed plot (T2) had the maximum proline content. Leaf temperature and canopy temperature were found to be maximum in stress as well as foliar application of A Other yield and yield attributing characters viz. Days required for 50% flowering, number of pods, peg to pod ratio, harvest index, number of shrivelled pod and yield per plant was significantly increased by the foliar application of triacontanol (2ml/l). The oil and protein content was significantly higher in control and lower in stress plot as compared to other treatments.
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