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EVALUATION OF CONVENTIONAL AND DRY LIQUID NITROGEN AND POTASSIUM FERTILIZER UNDER DRIP IRRIGATION SYSTEM FOR SWEET PEPPER (Capsicum annuum L.)

KrishiKosh

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Title EVALUATION OF CONVENTIONAL AND DRY LIQUID NITROGEN AND POTASSIUM FERTILIZER UNDER DRIP IRRIGATION SYSTEM FOR SWEET PEPPER (Capsicum annuum L.)
Ph D
 
Creator Division of Post Harvest Technology
 
Contributor Man Singh
 
Subject Sweet pepper, greenhouse, drip fertigation, N and K fertilizer application rate
 
Description T-8717
Drip fertigation is an effective way to apply water soluble fertilizer in a split
doses to meet water and nutrient demands of sweet pepper (Capsicum annuum L.).
However, fruit yield and the profitability of sweet pepper can be constrained if
nutrients are either insufficiently or excessively supplied. Considering primarily, the
cost and the easy availability of fertilizers, the conventional fertilizers such as urea
and muriate of potash (MOP) were evaluated for nutrient supply of N and K. The field
experiment was conducted for two consecutive seasons September 2010 to May 2011
and September 2011 to May 2012 under naturally ventilated greenhouse condition.
Sweet pepper variety Indra (red colour fruit) was selected for the study. The crop was
irrigated twice a week. Eleven N and K fertilizer combinations, including nine
combinations of urea and MOP, one commercially available ready mix dry liquid
(water soluble) fertilizer with a ratio of 20:20:20 and a control, were applied through
low head drip irrigation system weekly in 32 equal split doses. Uniform P (through
surface) was applied in all the treatments. The two years average maximum yield of
62.2 t ha-1 was achieved at the fertilizer rate of 400 kg N ha-1 and 360 kg K ha-1. This
yield was significantly higher than the average yield of 56.1 t ha-1 recorded from the
normal recommended dose of 320 kg N ha-1 and 360 kg K ha-1 and was at par with
400 kg N ha-1 and 450 kg K ha-1 (59.4 t ha-1). The average yield obtained from the
fertilizer rate of 400 kg N ha-1and 360 kg K ha-1 was 11, 26 and 104 % higher than the
fertilizer application of normal dose, ready mix dry liquid fertilizer and the control,
respectively. The apparent recovery efficiency and agronomical efficiency of nitrogen
was 35 % and 79 kg fruit/kg N applied, respectively with the best treatment of 400 kg
N ha-1 and 360 kg K ha-1. These results were obtained after enhancing the rate of
application of N fertilizer by 25 % while keeping the normal dose of application of K
fertilizer.
 
Date 2016-09-06T16:13:47Z
2016-09-06T16:13:47Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/75717
 
Format application/pdf
 
Publisher IARI, WATER TECHNOLOGY CENTRE