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ThesisItem Open Access Studies on the effect of chemicals on buddability and budding success in rough lemon (Citrus jambhiri Lush) seedling(CCSHAU, 2017) Gaurav Kant; Dalal, R.P.S.The present investigation entitled “Studies on the effect of chemicals on buddability and budding success in rough lemon (Citrus jambhiri Lush) seedling” was conducted in Department of Horticulture, CCS Haryana Agricultural University, Hisar during 2016-17. The experiment was carried out in Randomized Block Design (RBD) with thirteen treatments and three replication comprising foliar application of T1 (GA3 50 ppm + Urea 0.5%), T2 (GA3 50 ppm + Urea 1%), T3 (GA3 100 ppm + Urea 0.5%), T4 (GA3 100 ppm + Urea 1 %), T5 (NAA 50 ppm + Urea 0.5%), T6 (NAA 50 ppm + Urea 1%), T7 (NAA 100 ppm + Urea 0.5%), T8 (NAA 100 ppm + Urea 1%), T9 (ABA 50 ppm + Urea 0.5%), T10 (ABA 50 ppm + Urea 1% ), T11 (ABA 100 ppm + Urea 0.5%), T12 (ABA 100 ppm + Urea 1%) and T13 (Control, Water spray) twice after 30 and 60 days after transplanting on the same seedlings. Growth parameters like seedling height (73.52 cm), number of leaves (82.19), fresh weight (104.91 g), dry weight (33.18 g), leaf area (965,70 cm2), shoot dry weight (25.53 g), root fresh weight (16.83 g), root dry weight (7.65 g), root volume (14.57 ml) were found maximum in treatment T4 (GA3 100 ppm + Urea 1%) whereas, maximum number of secondary (43.00) and tertiary roots (87.67) was observed in treatment T8 (NAA 100 ppm + Urea 1%), maximum root diameter (12.93 mm) was observed in treatment T11 (ABA 100 ppm + Urea 0.5%). At 180 days after transplanting, maximum number of buddable seedling (95.24 %) was recorded in T11 (ABA 100ppm + Urea 0.5%) and T12 (ABA 100 ppm + Urea 1%) closely followed by (90.48 %) in T9 (ABA 50 ppm + Urea 0.5%) and T10 (ABA 50 ppm + Urea 1%). Maximum budding success (75.24 %) was found in the treatment T4 (GA3100 ppm +Urea 1%) closely followed by (67.50 %) in T12 (ABA 100ppm + Urea 1%). Maximum nitrogen (1.12 %) and potassium content (1.11 %) was estimated in the treatment T4 (GA3100 ppm + Urea 1%). On the basis of the findings of the present study it is clear that the growth of rough lemon seedlings was accelerated by the application of GA3 (100 ppm + urea 1%) and maximum and earlier buddable seedlings (95.24 %) was obtained in treatment T11 (ABA 100 ppm + Urea 0.5%).ThesisItem Open Access Studies on influence of foliar application of nutrients on growth, yield and quality of guava (Psidium guajava L.) cv. L-49(CCSHAU, 2017) Yadav, Priya; Sharma, J.R.The present investigations entitled “Studies on influence of foliar application of nutrients on growth, yield and quality of guava (Psidium guajava L.) cv. L-49”, was carried out on the four years old guava trees of cv. L-49, planted at a spacing of 6 m x 6 m in sandy laom soil at Experimental Orchard of Department of Horticulture, Chaudhary Charan Singh Haryana Agricultural University, Hisar during the year 2016-17. For the purpose of recording data, thirty nine uniform plants were selected and sprayed with ZnSO4 (0.50, 0.75 and 1.00%), FeSO4 (0.2, 0.4 and 0.6%), K2SO4 (0.5, 1.0 and 1.5%) and Urea (1.0, 1.5 and 2.0%), before flowering and after fruit set stage, during rainy and winter season. Based on the overall quantitative and qualitative assessment of fruits, it can be concluded that all the parameters were significantly influenced significantly with different treatment except acidity, number of seeds and weight of 100 seeds. Maximum increment in growth parameters i.e. plant height, plant spread, stem girth and average shoot length, maximum number of flowers per branch, fruit set, number of fruits per plant, fruit weight, volume of fruits, fruit size (length and breadth) and yield per tree were recorded in the trees sprayed with ZnSO4 @1.00 per cent, along with minimum number of days taken for fruit set, fruit drop and number of days for fruit maturity. However, maximum value of ascorbic acid, total sugars and non-reducing sugars were recorded under K2SO4 @1.5 per cent, during both the seasons of investigation. TSS was recorded maximum in the fruits picked from the trees sprayed with K2SO4 @1.5 per cent, during rainy season, while with K2SO4 @1.0 per cent, during winter season. Reducing sugars was recorded maximum under K2SO4 @1.00 per cent and K2SO4 @1.5 per cent, during rainy and winter season, respectively. However, effect on acidity, number of seeds per fruit and weight of 100 seeds per fruit was non-significant in both the seasons. Maximum N content in leaf was obtained with Urea @2 per cent, P and K content were obtained with K₂SO₄ @1.5 per cent, Zn content was obtained with the spray of ZnSO₄ @1.00 per cent and Fe content was obtained with the spray of FeSO4 @0.6 per cent.ThesisItem Open Access Studies on chemical thinning for quality improvement in Japanese plum (Prunus salicina Lindl.) cv. Kala Amritsari(CCSHAU, 2017) Rajput, Vinita; Bhatia, S.K.The present investigations entitled “Studies on chemical thinning for quality improvement in Japanese plum (Prunus salicina Lindl.) cv. Kala Amritsari”, was carried out on the eleven year old plum trees planted at a spacing of 6 m x 6 m at experimental farms of Department of Horticulture, Chaudhary Charan Singh Haryana Agricultural University, Hisar during the year 2014-16. The three individual experiments, viz. foliar application of GA3 for flower inhibition, chemical blossom thinning and chemical fruitlet thinning were performed. GA3 at 25, 50, 75 and 100 ppm was spayed before the leaf fall stage in year 2014. The blossom thinning chemicals, urea (4 & 6%), ATS (2 & 4%) and NAA (20 & 40 ppm) were spayed at full stage. The fruitlet thinning chemicals, thiourea (2.5 & 5%), NAA (50 & 100 ppm) and ethephon (50 & 100 ppm) were sprayed after fruit set when the fruits attained pea size. The observations regarding, flowering, fruiting and fruit quality parameters were recorded at different time during the year 2015 and 2016. The application of GA3 at 100 ppm was found most effective in reducing crop load (49.22% and 44.02% reduction in flowering) and increased fruit weight (15.68 g) followed by GA3 applications at 75 ppm as compared to control. Quality parameters (TSS, TSS/acid ratio, sugars etc.) were recorded highest in 75 ppm GA3 treatment. The blossom thinning with ATS at 4% resulted in minimum number of fruits per shoot (32.64, 28.11) and thereby increased fruit size (24.87 mm & 22.82 mm length) and quality parameters followed by ATS treatment at 2%. Among the chemicals used for fruitlet thinning, ethephon at 100 ppm (20.74, 18.27) followed by ethephon at 50 ppm (22.13, 21.00) resulted in minimum number of fruits per shoot and the fruit quality parameters (TSS- 14.65%, 13.70%) were found to be maximum with the application of ethephon at 100 ppm followed by application of NAA at 100 ppm and ethephon at 50 ppm. All the chemical thinning treatments significantly reduced the crop load on tree, increased leaf to fruit ratio, leaf area, fruit weight, fruit size and improved fruit quality, but reduced total yield as compared to control in both the years.