Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810127711
Authors: G.SAI PRASANNA
Advisor: Dr. A. BHAGWAN
Title: EFFECTS OF TIP PRUNING, MULCHING AND PRE-HARVEST SPRAYS ON FRUIT DEVELOPMENT, YIELD AND QUALITY OF GUAVA (Psidium guajava L.)
Publisher: College of Horticulture, Rajendranagar, HYD-30
Citation: Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30
Language: en
Type: Thesis
Pages: 1-176
Agrotags: null
Keywords: TIP PRUNING, MULCHING AND PRE-HARVEST SPRAYS ON FRUIT DEVELOPMENT, YIELD AND QUALITY
Abstract: A set of two experiments on the effects of tip pruning (level of tip pruning of 10 cm, 15cm and 20cm) and mulching (black polythene mulch and paddy straw mulch) of two and half years old guava cv. Allahabad Safeda under randomized block design with factorial concept and effect of pre-harvest sprays (1% di- potassium hydrogen orthophosphate, 1% potassium nitrate, 1% borax, 4% calcium nitrate, 0.8% zinc sulphate and control) on fruit development, yield and quality of sixteen years old guava cv. Lucknow-49 was conducted at Fruit Research Station, Sangareddy District, Telangana. Various yield parameters like number of fruits per tree at the time of harvest, yield per tree (kg/tree), date of maturity of fruit and physical parameters like fruit length(mm), fruit breadth(mm), fruit weight(g), specific gravity, shelf life and bio-chemical parameters like TSS (ͦBrix), ascorbic acid(mg/100g), titrable acidity(%), total sugars(%), reducing sugars(%), non- reducing sugars (%) and TSS: Acid ratio were recorded. In the first experiment, among pruning treatments, tip pruning of 15cm and among different mulches, paddy straw mulch has recorded significantly highest number of fruits per tree. Significantly highest fruit length, fruit breadth, fruit weight, specific gravity and shelf life were recorded with the level of tip pruning of 10 cm. Black polythene mulch has recorded significantly higher fruit length, fruit breadth, fruit weight and shelf life over paddy straw mulch. Tip pruning of 20 cm and paddy straw mulch has recorded significantly higher total soluble solids, ascorbic acid, total sugars and reducing sugars. Further, among interaction effects, tip pruning of 15cm with paddy straw mulch has recorded significantly highest number of fruits per tree (85.66) and yield per tree (17.13 kg/tree). Tip pruning of 10cm with black polythene mulch has recorded significantly highest fruit length, fruit breadth and fruit weight. Tip pruning of 10cm with paddy straw mulch has highest benefit-cost ratio (2.81). In the present investigation, tip pruning might have channelized the carbohydrates for fruit development and mulches on soil moisture conservation effects might have increase the overall yield. In conclusion with above experiment, tip pruning of 15cm with paddy straw mulch has increased the number of fruits per tree, yield per tree and benefit-cost ratio (2.81) of two and half years old guava cv. Allahabad Safeda. In the second experiment, among different pre-harvest spray treatments, zinc sulphate at 0.8% has recorded significantly maximum number of fruits per tree (621.00), yield per tree (124.20 kg/tree), specific gravity (1.02), total soluble solids (9.60 ͦ B), ascorbic acid (197.75mg/100g), total sugars (12.29%), reducing sugars (6.90%), non-reducing sugars (5.38%), TSS: Acid ratio (36.88) when compared to control. However, calcium nitrate at 4% has recorded significantly higher shelf life (13.25 days) over other pre-harvest spray treatments. Significantly highest titrable acidity (0.445%) has recorded with borax 1%. Zinc sulphate at 0.8% has recorded highest benefit-cost ratio (2.43). Significant effect of zinc sulphate in increasing yield might be due to the synthesis of tryptophan which serves as precursor for auxin synthesis in the present investigation. On the basis of above results obtained in the present investigation, it can be concluded that pre-harvest spray of zinc sulphate at 0.8% has higher number of fruits per tree at the time of harvest, yield per tree, specific gravity, total soluble solids, ascorbic acid, total sugars, reducing sugars, non-reducing sugars and TSS: Acid ratio. Calcium nitrate at 4% extended the shelf life of sixteen years old guava cv. Lucknow-49 by 13.25 days
Description: among different pre-harvest spray treatments, zinc sulphate at 0.8% has recorded significantly maximum number of fruits per tree (621.00), yield per tree (124.20 kg/tree), specific gravity (1.02), total soluble solids (9.60 ͦ B), ascorbic acid (197.75mg/100g), total sugars (12.29%), reducing sugars (6.90%), non-reducing sugars (5.38%), TSS: Acid ratio (36.88) when compared to control. However, calcium nitrate at 4% has recorded significantly higher shelf life (13.25 days) over other pre-harvest spray treatments. Significantly highest titrable acidity (0.445%) has recorded with borax 1%. Zinc sulphate at 0.8% has recorded highest benefit-cost ratio (2.43). Significant effect of zinc sulphate in increasing yield might be due to the synthesis of tryptophan which serves as precursor for auxin synthesis in the present investigation. On the basis of above results obtained in the present investigation, it can be concluded that pre-harvest spray of zinc sulphate at 0.8% has higher number of fruits per tree at the time of harvest, yield per tree, specific gravity, total soluble solids, ascorbic acid, total sugars, reducing sugars, non-reducing sugars and TSS: Acid ratio. Calcium nitrate at 4% extended the shelf life of sixteen years old guava cv. Lucknow-49 by 13.25 days.
Subject: Fruit Science
Theme: among different pre-harvest spray treatments, zinc sulphate at 0.8% has recorded significantly maximum number of fruits per tree (621.00), yield per tree (124.20 kg/tree), specific gravity (1.02), total soluble solids (9.60 ͦ B), ascorbic acid (197.75mg/100g), total sugars (12.29%), reducing sugars (6.90%), non-reducing sugars (5.38%), TSS: Acid ratio (36.88) when compared to control. However, calcium nitrate at 4% has recorded significantly higher shelf life (13.25 days) over other pre-harvest spray treatments. Significantly highest titrable acidity (0.445%) has recorded with borax 1%. Zinc sulphate at 0.8% has recorded highest benefit-cost ratio (2.43). Significant effect of zinc sulphate in increasing yield might be due to the synthesis of tryptophan which serves as precursor for auxin synthesis in the present investigation. On the basis of above results obtained in the present investigation, it can be concluded that pre-harvest spray of zinc sulphate at 0.8% has higher number of fruits per tree at the time of harvest, yield per tree, specific gravity, total soluble solids, ascorbic acid, total sugars, reducing sugars, non-reducing sugars and TSS: Acid ratio. Calcium nitrate at 4% extended the shelf life of sixteen years old guava cv. Lucknow-49 by 13.25 days.
Research Problem: EFFECTS OF TIP PRUNING, MULCHING AND PRE-HARVEST SPRAYS ON FRUIT DEVELOPMENT, YIELD AND QUALITYOF GUAVA (Psidium guajava L.)
These Type: M.Sc
Issue Date: 2017-10-31
Appears in Collections:Thesis

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