Integrated water and nutrient management in Sathgudi sweet orange (Citrus sinensis)

L MUKUNDA LAKASHMI; K T VENKATARAMANA; P S SHIRGURE; A K SRIVASTAVA; PRAKASH PATIL

doi:10.56093/ijas.v89i11.95346

Authors

L MUKUNDA LAKASHMI Senior Scientist, Dr Y S R Horticultural University, Tirupati, Andhra Pradesh 517 502, India
K T VENKATARAMANA Principal Scientist AICRP on Fruits, CRS, Dr YSR Horticultural University
P S SHIRGURE Principal Scientist, ICAR-CCRI, Nagpu
A K SRIVASTAVA Principal Scientist, ICAR-CCRI, Nagpu
PRAKASH PATIL Project Coordinator, AICRP (Fruits), ICAR-IIHR, Bengaluru

https://doi.org/10.56093/ijas.v89i11.95346

Keywords:

Drip irrigation, Fertigation, Irrigation schedule, Partial factor productivity, Sathgudi, Sweet orange

Abstract

The combined effect of drip irrigation with fertigation on plant growth, yield and quality of 10 year-old bearing sweet orange (Citrus sinensis cv. Sathgudi) was studied during 2013â€“17 at Dr YSR Horticultural University, AICRP on Fruits, CRS, Tirupati. The experiment was laid out in factorial randomised block design with nine treatment combinations, comprising three irrigation schedules, viz. 70 % evaporation replenishment (ER) , 80 % ER , and 90 % ER , and three fertigation levels, viz. fertigation with 60 % RDF (recommended dose of fertilizers), 70% RDF and 80% RDF based NPK doses replicated six times. The maximum plant canopy volume (16.84 m3), fruit yield (14.18 t/ha) and TSS/acidity ratio (20.7) of sweet orange was observed with the drip irrigation scheduled at 90 % ER combined with 70 % RDF fertigation treatment combination. The fruit yield efficiency per unit of canopy volume was also observed maximum (0.84) with irrigation scheduling at 90 % ER and fertigation with 70 % RDF dose. The sustainable production of sweet orange was obtained with irrigation scheduling at 90 % ER along with fertigation technology at 70 % RDF with 27-30% saving in water and fertilizers.

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