Browsing by Author "GEETHANJALI, KOTLA"
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ThesisItem Open Access EFFECT OF FOLIAR APPLICATION OF ETHREL AND BORON ON REPRODUCTIVE EFFICIENCY OF GROUNDNUT (Arachis hypogaea L.)(ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, 2012) GEETHANJALI, KOTLA; ASHOKA RANI, YA field experiment was conducted at Agricultural College Farm, Bapatla, during kharif 2011-12 to find out the effect of foliar application of ethrel and boron on reproductive efficiency of groundnut (Arachis hypogaea L.) Ten treatments consisting of application of Ethrel @ 400 ppm at 25 DAS (T1), Ethrel @ 400 ppm at 45 DAS (T2), Ethrel @ 400 ppm at 25 and 45 DAS (T3), Borax @ 0.25% at 25 DAS (T4), Borax @ 0.25% at 45 DAS (T5), Borax @ 0.25% at 25 and 45 DAS (T6), Ethrel @ 400 ppm + Borax @ 0.25% at 25 DAS (T7), Ethrel @ 400 ppm + Borax @ 0.25% at 45 DAS (T8), Ethrel @ 400 ppm + Borax @ 0.25% at 25 and 45 DAS (T9), Water spray (T10) were tried in Randomized Block Design with three replications. The findings of the experiment revealed that the growth parameters such as plant height, number of branches, number of leaves, leaf area and total dry matter measured at different intervals were significantly influenced by ethrel and boron treatments. Application of Ethrel + Borax at 25 and 45 DAS resulted in increase in plant height (78.9%), number of branches (37.8%), number of leaves (64.7%) and number of flowers ( 61.9%) over control. The spray of Ethrel + Borax at 25 and 45 DAS exhibited better performance in increasing leaf area by 94.0 per cent over control and by 36.7 to 76.8 per cent over the remaining treatments (T2, T3, T4, T5 and T6). The total dry matter increased by 73.3 per cent over control and by 21.1 to 56.3 per cent compared to remaining treatments. The results indicated that the growth characteristics like AGR, CGR, RGR and NAR increased with the spray of ethrel and boron due to increment in the leaf area and dry matter production. Biochemical parameters like chlorophyll a, chlorophyll b, carotenoids, total chlorophyll content and seed oil content in groundnut increased with the foliar spray of ethrel and boron. The highest total chlorophyll content was observed with the spray of Ethrel + Borax at 25 and 45 DAS. The variation in oil content of groundnut among treatments was on par. However, higher oil content was observed in Ethrel + Borax at 25 and 45 DAS (T9) and lower content was observed in control. Foliar spray of ethrel and boron significantly increased the yield and yield attributes. The number of pods plant-1(18.9%), pod weight plant-1 (21.7 %), kernel weight plant-1 (55.9%), test weight (37.6%), and the yield ha-1 (36.3 %) were high with the spray of ethrel and boron at 25 and 45 DAS. Spray of Ethrel + Borax at 45 DAS (T8) increased the shelling percentage by 21.9 per cent over control and 8.6 to 16.4 percent compared to the remaining treatments. However spray of Ethrel + Borax at 25 and 45 DAS recorded higher net return of Rs. 51752 and proved superior to the rest of the treatmentsThesisItem Open Access EFFECT OF FOLIAR APPLICATION OF NUTRIENTS AND PLANT GROWTH REGULATORS ON GROWTH, DEVELOPMENT, QUALITY AND YIELD OF Bt COTTON(Acharya N.G. Ranga Agricultural University, 2017) GEETHANJALI, KOTLA; Dr. R.ANKAIAHA field experiment was conducted at Agricultural College Farm, Bapatla, during Kharif, 2013-14 and Kharif, 2014-15 to find out the “Effect of foliar application of nutrients and plant growth regulators on growth, development, quality and yield of Bt cotton”. The experiment was laid out in split plot design and replicated thrice. There are two main treatments i.e. Bt cotton hybrids viz., Bhaskara hybrid and Bunny BG II hybrid and fourteen sub treatments viz., macro nutrients Urea (2 %), DAP (2%), KNO3 (2 %) and growth regulators viz., NAA (30 ppm) and GA3 (30 ppm). Nutrients and growth regulators were sprayed individually and in combinations at peak squaring/budding stage, peak flowering stage, peak boll formation stage and peak boll development stage. The results revealed that significant differences were observed between two hybrids and among foliar treatments, however their interactions were non significant. The findings of the experiment revealed that the growth parameters such as plant height, number of branches, leaf area, total drymatter measured at different intervals were significantly influenced by Urea (2%), DAP (2%), KNO3 (2%) and growth regulators viz., NAA (30 ppm) and GA3 (30 ppm spray treatments compared to control. Bhaskara hybrid recorded higher plant height (18.47%, 17.53%), number of branches plant-1 (8.06%, 8.26%) total dry matter (19.11%, 17.86%) and leaf area (10.89%, 10.41%) over Bunny BG II hybrid in both the years respectively. Among all the treatments, application of gibberellic acid along with urea, DAP and KNO3 (T14) at different stages recorded higher plant height (18.71%; 16.82%), leaf area (18.61%; 15.92%) and total dry matter (18.29%; 17.63%) over control in both the years respectively. The results indicated that the growth characteristics like CGR, RGR and NAR increased with the spray of GA3 and NAA combined with macro nutrients (Urea, DAP, KNO3) due to increment in the leaf area and total dry matter production. Biochemical parameters like total chlorophyll content, NPK content, nitrate reductase activity and photosynthetic rate increased with the foliar spray of GA3 combined with nutrients compared to NAA combined with nutrients and nutrients alone and control in both the years of study. Yield components viz., number of bolls plant-1, boll weight, seed index, and seed cotton yield were significantly increased in Baskara hybrid compared to Bunny BG II hybrid in both the years of study. Number of bolls and squares dropped plant-1 reduced in GA3, NAA treatments compared to control. Foliar spray of GA along with KNO3 at different stages (T13) recorded significantly higher yield and yield attributes. Number of pods plant-1 (25.64 %; 20.01), boll weight (16.37% ; 18.36%) and seed cotton yield (30.88%; 25.60) were high with the spray of GA3 + KNO3 (T13). Fibre quality parameters viz., Ginning percentage, 2.5 per cent span length, bundle strength, and micronaire value were significantly influenced by the macro nutrients and growth regulator treatments. In terms of genotypic performance Bhaskara hybrid showed better performance compared to Bunny BG II. Among all the foliar treatments GA3 @ 30 ppm + KNO3 @ 2% spray at peak squaring, peak flowering, peak boll formation stage and peak boll developmental stage (T13) recorded higher growth, physiological efficiency, yield attributes and fiber quality traits.