Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810084945
Authors: B. R, KUMARA
Advisor: Mansur, Chidanand.P
Suhas P., Wani
Other: Allolli, T. B
S. L, Jagadeesh
Mesta, R. K
Chander, Girish
Meti, Shankar
D, Satish
Title: EFFECT OF NUTRIENT MANAGEMENT ON GROWTH, YIELD AND QUALITY AND PRE-HARVEST SPRAY OF CHEMICALS ON STORAGE LIFE OF ONION (Allium cepa L.)
Publisher: UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT
Language: en_US
Type: Thesis
Pages: 475
Agrotags: null
Keywords: STORAGE LIFE OF ONION (Allium cepa L.)
Abstract: Field experiments were conducted during kharif and rabi season of 2015 and 2016, at college of horticulture, Bagalkot and in the farmers field at Kotur village (Dharwad), to study the effect of nutrient management on growth, yield and quality and pre-harvest spray of chemicals on storage life of onion. Two field experiments (Expt-I & II) on nutritional levels, sources and time of application comprising 20 and 12 treatments respectively were laid out with Factorial Randomized Block Design with 3 replications. Storage experiment with 9 treatments was laid out under Randomized Block Design with three replications. Increasing levels of potassium exhibited an increase in growth and yield of onion. Application of 200 per cent RDK recorded significantly higher growth and bulb yield (48.91 t/ha) and yield related parameters of onion compared to 150 and 175 per cent RDK. The higher benefit cost ratio of 1:2.65 was recorded in 150 per cent RDK and least benefit cost ratio was recorded in 100 per cent RDK (1:2.54). Among the sources, sulphate of potash showed better effect on growth, yield, nutrient uptake, nutrient use efficiency and excellent storage quality compared to kcl. MOP recorded higher benefit cost ratio (1:3.09) over SOP (1:2.09). Two split application of potash proved to be superior than the traditional practice of single application. Growth, yield, nutrient uptake and quality parameters were recorded higher in soil test based nutrient management (STBNM) treatment 93.75:56.25:93.75 kg NPK ha-1 + 1 per cent Aquasap (Field-I). Growth, yield, nutrient uptake and quality parameters was found maximum in 125:75:125 kg NPK ha-1 (Field-II). The higher benefit cost ratio was recorded in STBNM and Aquasap (1:2.20) which was followed by RDF (1:2.09) (Field-I). The higher benefit cost ratio (1:2.09) was recorded in RDF and STBNM (Field-II). Sulphate of potash was found better growth, yield, nutrient uptake, nutrient use efficiency and excellent storage quality compared to MOP (Field-I & II). The higher benefit cost ratio was recorded with two split application of MOP as compared to SOP. The pre-harvest chemicals spray of Azoxystrobin (0.5 ml /litre) + Calcium chloride (0.5%) + Borax 1000 ppm resulted in less bulb rotting, sprouting, physiological loss in weight and resulted in higher marketable bulb yields. The maximum phenols and pyruvic acid content was recorded with pre-harvest chemicals spray of Azoxystrobin (0.5 ml /litre) + Calcium chloride (0.5%) + Borax 1000 ppm. Pre-harvest chemicals spray of Calcium chloride (0.5%) + Borax 1000 ppm was recorded higher total soluble solids, dry matter and minimum moisture content of onion bulbs in storage.
Subject: Horticulture
Theme: EFFECT OF NUTRIENT MANAGEMENT ON GROWTH, YIELD AND QUALITY AND PRE-HARVEST SPRAY OF CHEMICALS ON STORAGE LIFE OF ONION (Allium cepa L.)
Research Problem: Theses
These Type: Ph.D
Issue Date: 2017-09
Appears in Collections:Theses

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