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2011 - 20173
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Subject: Fruit Science × Author: BABITA ×
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    ThesisItemOpen Access
    “Studies on the effect of Dormex and CPPU on biochemical changes and production of kiwifruit (Actinidia deliciosa Chev.)”
    (UHF,NAUNI, 2017) BABITA; RANA, VISHAL S.
    ABSTRACT The present investigation entitled “Studies on the effect of Dormex and CPPU on biochemical changes and production of kiwifruit (Actinidia deliciosa Chev.)” was carried out in the Kiwifruit Block of Department of Fruit Science during 2014-16. The kiwifruit vines having uniform growth and vigour, planted at a spacing of 4m x 6m and trained on T- bar system were selected for the present study. The entire program of study was divided into three experiments. The Experiment-I was laid out according to RBD 12-years-old kiwifruit cv. Hayward and comprised of seven treatments viz., T 1 (Dormex 2%), T 2 (DORMEX 2% + Mineral oil (Orchol) 2%), T 3 (Dormex 4%), T 4 (Dormex 4 % + Mineral oil (Orchol) 2%), T 5 (Dormex at 6%), T 6 (Dormex Mineral oil (Orchol) 2%) and T 7 (control). These treatments were given 45 days prior to anticipated date of bud break as a foliar spray. Application of Dormex at 4 per cent along with mineral oil 2 per cent resulted an advancement of bud break by 9-10 days, emergence of flower buds by 9 days, full bloom date by 9-11 days, fruit set by 11-12 days. Maximum number of shoots emergence and number of buds per flowering shoots were also obtained with this treatment in comparison to control. Further, this treatment resulted in highest total fruit yield, maximum periodic increase in bud peroxidase activity with the concurrent decrease in catalase activity and highest C/N ratio in comparison to untreated vines. The Experiment-II was laid out according to Variance-ratio test (F-test) and Fisher’s t-test/ Behran dtest on 30-years-old vines of Allison kiwifruit, comprising CPPU (a synthetic cytokinin) treated and untreated fruits to study the different growth kinetic curves in developing kiwifruit. The CPPU 5ppm was applied as a fruit dip treatment after 10 days of petal fall. The results revealed that CPPU treated fruit exhibited higher fresh weight at 15 days interval exhibited double sigmoid growth pattern, characterized by rapid growth for 75days (Stage-I), period slow growth for 15 days (Stage-II) and period of enhanced growth for 90 days (Stage-III). This treatment also resulted in bigger sized fruits in terms of length and diameter. The CPPU treated fruits recorded higher amounts of total carbohydrates, ascorbic acid, organic acids and nutrients viz., nitrogen, phosphorus, potassium, calcium and magnesium. Among growth hormones, CPPU exhibited higher levels of IAA, GA 3 , Zeatin riboside with lower levels of ABA during all fruit growth stages. Residue dynamics of CPPU in kiwifruit revealed a rapid and continuous decrease of CPPU residues in developing kiwifruit with complete dessipation after 45 days of application. The Experiment-III was carried out to illucidate the effect of CPPU on the postharvest behaviour of kiwifruit after storage at ambient temperature (25+2 o C). This experiment was laid out according to RBD factorial. During storage, CPPU treated fruits exhibited higher per cent of physiological loss in weight (PLW), reduced titratable acidity, high TSS, polygalacturonase (PG) and pectin methyl esterase (PME) activities. Further, the CPPU application enhanced the climacteric rise in respiration and ethylene production during fruit ripening, shortening the shelf life of kiwifruit in comparison to untreated fruits.
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    ThesisItemOpen Access
    EFFECT OF ORGANIC INPUTS ON PLANT GROWTH, QUALITY AND SOIL HEALTH OF KIWIFRUIT
    (UHF,NAUNI,SOLAN, 2011) BABITA; SHARMA, SOM DEV
    ABSTRACT The present investigations entitled “Effect of organic inputs on plant growth, quality and soil health of kiwifruit” were conducted in the experimental orchard of Department of Fruit Science, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, during the year 2009 and 2011. The study was laid out in randomized block design and replicated thrice. Therefore, in the present investigation the kiwifruit vines were treated with different treatment combination of vermicompost; FYM; biofertilizers; green manure and vermiwash. Among the different treatment combination T13 [FYM @15 kg vine-1 + green manure + vermicompost @ 15 kg vine- 1+ biofertilizer (mixed culture @ 50 g vine-1)+ vermiwash at 15 days interval @ 2% v/v] was found most effective in producing better fruit quality, increased physicochemical and biological properties (organic carbon, available soil nutrient status, leaf nutrient status, Azotobacter sp., Pseudomonas sp., soil fungi, Actinomycetes sp., and AM spore population) of the soil. Whereas, T1 (control; recommended dose of NPK+20 kg FYM) produced maximum yield over all the treatments. The preliminary present studies indicate that organic agro-inputs may be helpful to enhance the fruit quality and improve soil health in respect to physico-chemical and biological properties of soil.
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    ThesisItemOpen Access
    EFFECT OF DORMEX, CPPU AND MANUAL FRUIT THINNING ON FRUIT YIELD AND QUALITY OF KIWIFRUIT (Actinidia deliciosa Chev.)
    (2012) BABITA; RANA, VISHAL S.
    ABSTRACT The present investigation on “Effect of Dormex, CPPU and manual fruit thinning on fruit yield and quality of kiwifruit (Actinidia deliciosa Chev.)” was conducted in the experimental orchard of Department of Fruit Science. The kiwifruit vines having uniform growth and vigour, planted at a spacing of 4m x 6m and trained on T- bar system were selected for the present study. The entire program of study was divided into two experiments. The experiments were laid out in Randomized Block Design. The first experiment was carried out on 8-year-old kiwifruit cv. Hayward and comprised of seven treatments viz., T1 (Dormex at 2 % on 10th February), T2 (Dormex at 2 % on 20th February), T3 (Dormex at 2 % on 2nd March), T4 (Dormex at 4 % on 10th February), T5 (Dormex at 4 % on 20th February), T6 (Dormex at 4 % on 2nd March) and T7 (control). Application of 4 per cent Dormex on 10th February i.e. 40 days prior to the anticipated date of bud break resulted in an advancement of bud break and floral bud emergence by 7 days, fruit set by 5 days and also increased the flowering period by 5 days. This treatment resulted in maximum net benefit in comparison to those of untreated kiwifruit vines. The second experiment was carried out in 27-year-old kiwifruit cv. Allison comprising of manual fruit thinning alone and in combination with 5ppm CPPU. This experiment included 8 treatments viz., T1 (control), T2 (5ppm CPPU), T3 (thinning upto 4 fruits/shoot), T4 (thinning upto 4 fruits/shoot + 5ppm CPPU), T5 (thinning upto6 fruits/shoot), T6 (thinning upto 6 fruits/shoot + 5ppm CPPU) T7 (thinning upto8 fruits/shoot) and T8 (thinning upto 8 fruits/shoot + 5ppm CPPU). The CPPU (urea based cytokinin) was applied as a fruit dip treatment after 10 days of petal fall. The results revealed that fruit thinning by retaining 6 fruits/shoot along with dipping in 5ppm CPPU after 10 days of petal fall resulted in higher yield of better size and quality fruits. This treatment gave maximum net profit as compared to those of untreated vines