INTEGRATED NUTRIENT MANAGEMENT STUDIES IN ONION
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Date
2019-12
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Integrated nutrient management studies in onion” was carried out
at the Experimental Farm, Department of Soil Science and Water Management, Dr YS Parmar University of
Horticulture and Forestry, Nauni, Solan (HP) during rabi season of 2017-18 and 2018-19. Different
combinations of organic and inorganic sources of nutrients were tried in the form of nine treatments viz. T1
(Absolute control), T2 (RD of FYM + NPK), T3 (5 % Jeevamrut), T4 (RD of FYM + NPK through FYM), T5
(RD of FYM + 5 % Jeevamrut), T6 (VC + RD of NPK through FYM), T7 (VC + 5 % Jeevamrut), T8 (50 %
FYM + 50 % VC + RD of NPK through FYM) and T9 (50 % FYM + 50 % VC + 5 % Jeevamrut) in a plot of
2.25 × 1.20 m2 dimension. The experiment was laid out in a randomised block design (RBD) with three
replications involving a spacing of 15 × 10 cm. The seedlings of onion cv. Nasik Red were planted on 27th
November during 2017 and 1st November during 2018. The results revealed significantly highest post harvest
fertility status of macronutrients (NPK) (386, 156.6 and 384.1 kg ha-1, respectively) and their uptake (122.5,
16.7 and 67.4 kg ha-1, respectively) was recorded under recommended INM practice i.e. 125 N: 75 P: 60 K kg
ha-1 + FYM @ 250 q ha-1 (T2). The close scrutiny of purely organic module T6 (VC - equivalent to N content of
recommended FYM + RD of NPK through FYM on N equivalent basis) showed it next best in values with
respect to available NPK and their uptake. Similarly, significantly highest bulb and biological yield (295.5 and
441.9 q ha-1, respectively) and yield contributing component i.e. bulb size (19 cm²) as well as net income
(4,74,812 ` ha-1) with a relatively higher B:C ratio (4.1:1) was recorded under recommended INM practice (T2).
It was closely followed by purely organic module T4 (RD of FYM + RD of NPK through FYM on N equivalent
basis) with regards to bulb and biological yield, yield contributing component, net income and B:C ratio. The
plots fertilized with RD of FYM + RD of NPK through FYM on N equivalent basis has recorded only 13.6 per
cent less bulb yield in comparison with recommended INM practice (T2). Therefore, the purely organic modules
T4 (RD of FYM + RD of NPK through FYM on N equivalent basis) and T6 (VC - equivalent to N content of
recommended FYM + RD of NPK through FYM on N equivalent basis) with on farm production of VC can be
suggested for organic cultivation of onion.
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