ENHANCING DROUGHT TOLERANCE AND YIELD THROUGH FOLIAR NUTRITION IN GROUNDNUT

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dc.contributor.advisorLATHA, P
dc.contributor.authorRAJITHA, B
dc.date.accessioned2017-05-23T06:12:02Z
dc.date.available2017-05-23T06:12:02Z
dc.date.issued2015
dc.descriptionENHANCING DROUGHT TOLERANCE AND YIED THROUGH FOLIAR NUTRITION IN GROUNDNUTen_US
dc.description.abstractThe present investigation was aimed at enhancing drought tolerance and yield in groundnut (var. Dharani) under moisture stress condition by foliar application of different nutrients. The foliar nutrients were tested under field conditions for high WUE and other drought tolerance traits in terms of physiological efficiency, biochemical traits and yield attributes. The field experiment was conducted during rabi, 2014-15 in sandy loam soils of dry land farm, Sri Venkateswara Agricultural College, Tirupati of Acharya N.G. Ranga Agricultural University. The experiment was conducted in randomized block design, replicated thrice with 12 treatments including two controls (irrigated, stress) and ten foliar nutrients under imposed moisture stress condition from 45-75 DAS (pod initiation stage to maturation stage). The adverse effects of water stress on crop growth can be mitigated by application of chemicals like nutrients, which induce the plants to become adaptive to water-stress conditions for a specified period of time. Foliar application of key nutrients like Phosphorous (P), Potassium (K), Calcium (Ca), Zinc (Zn) and Boron (B) alleviates these deficiencies and increases drought tolerance by maintaining key physiological processes. The study finally reveals that, the morphological parameters viz., plant height, leaf area, total dry matter, growth parameters (CGR, RGR, NAR, LAI, LAD), physiological parameters viz., total chlorophyll content, specific leaf area, relative water content, relative injury, chlorophyll stability index, and yield parameters viz., 100-kernel weight, harvest index, shelling per cent, pod yields recorded high values in control irrigated treatment compared to control stress treatment. Among the foliar spray treatments to enhance drought tolerance, NPK- 19:19:19 @ 0.5% followed by KCl @ 1% and KNO3 @ 0.5% showed high physiological efficiency and yield under moisture stress condition. In groundnut, application of potassium improves relative water content of plants under normal as well as water stress conditions. The maintenance of plant water economy by potassium application in terms of high relative water content could be ascribed to the supposed role of potassium in stomatal resistance, water use efficiency and lowered transpiration rate. Phosphorous helps in development of more extensive root system and nodulation. Foliar spraying of nitrogen at moisture deficit can sustain the chlorophyll content of plants under moisture stress. Computing yield advantage and cost benefit ratio of foliar spray treatments for drought mitigation, NPK- 19:19:19 @ 0.5% recorded significantly maximum pod yield and B:C ratio followed by KNO3 @ 0.5% and KCl @ 1% compared to other treatments under moisture stress condition. The present study reveals that, foliar spray treatments NPK- 19:19:19 @ 0.5%, KNO3 @ 0.5% and KCl @ 1% are superior in terms of drought tolerance, physiological efficiency, heat tolerance, yield and yield components. Other foliar spray treatments 2% urea, 2% Di-Ammonium Phosphate (DAP), 0.5% ZnSO4, 0.5 % FeSO4, mixed fertilizer 1% urea+ 0.2% ZnSO4+ 0.5% FeSO4, and 0.5% KNO3 showed moderate performance in all attributes. Hence, NPK-19:19:19 @ 0.5%, KNO3 @ 0.5% and KCl @ 1% can be recommended to groundnut crop prone to moisture stress condition (Permanent wilting point) to sustain plant growth and final yields. Foliar application of nutrients is a very effective short term solution for certain nutrient deficiencies and perhaps, during times of moisture and drought stress and can help in mitigating drought stress.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810012114
dc.keywordsDROUGHT, YIED, FOLIAR,GROUNDNUTen_US
dc.language.isoen_USen_US
dc.pages183p.en_US
dc.publisherAcharya N.G. Ranga Agricultural University, Gunturen_US
dc.subPlant Pathologyen_US
dc.themeENHANCING DROUGHT TOLERANCE AND YIED THROUGH FOLIAR NUTRITION IN GROUNDNUTen_US
dc.these.typeM.Scen_US
dc.titleENHANCING DROUGHT TOLERANCE AND YIELD THROUGH FOLIAR NUTRITION IN GROUNDNUTen_US
dc.typeThesisen_US
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