Effect of Hydrogel and Foliar Spray of Agro-chemicals on Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]
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Date
2022
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Abstract
A field experiment was conducted during rabi season, 2021-22 at
the Agronomy farm, S.K.N. College of Agriculture, Jobner, to study the
“Effect of Hydrogel and Foliar Spray of Agro-chemicals on
Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]”.
The experiment was laid out in factorial randomized block design with
three replications, assigning sixteen treatment combinations consisting of
four hydrogel levels (control, 2.5, 5.0 and 7.5 kg/ha) and four treatments
of foliar spray of agro-chemicals (water spray, thiourea 500 ppm, salicylic
acid 100 ppm and NPK (19:19:19) 0.5 %) were applied to the Indian
mustard var. Giriraj (DRMRIJ-31).
The experimental results showed that application of hydrogel at 5.0
kg/ha, being at par with application of hydrogel at 7.5 kg/ha, recorded
significantly higher plant height, dry matter accumulation, chlorophyll
content, number of primary and secondary branches, CGR, number of
siliqua/plant, number of seeds/siliqua, seed yield (1797 kg/ha), stover
yield (3863 kg/ha), biological yield (5660 kg/ha), net returns ( 93379/ha)
and B:C ratio (3.82) of Indian mustard as compared to hydrogel at 2.5
kg/ha and control. Further, the same trend was also observed for nitrogen,
phosphorus and potassium content in seed and stover and their uptake by
seed, stover and total uptake, protein content in seed, oil yield, water use
efficiency and soil moisture content in soil. While, the plant stand, RGR,
number of primary and secondary branches at 40 DAS, test weight and
harvest index of Indian mustard was not improved significantly due to
different levels of hydrogel.
Results further showed that foliar spray of thiourea (500 ppm)
being at par with salicylic acid (100 ppm) recorded significantly higher dry
matter accumulation, number of primary and secondary branches, CGR,
number of siliqua/plant, number of seeds/siliqua, seed yield (1820 kg/ha),
stover yield (3897 kg/ha), biological yield (5717 kg/ha), nitrogen,
phosphorus and potassium uptake by seed, stover, oil content, oil yield,
along with higher water use efficiency, net returns ( 95733/ha) and B:C
ratio (3.95) of Indian mustard. However, maximum plant height chlorophyll
content, nitrogen, phosphorus and potassium content in seeds were
recorded under foliar spray of NPK (19:19:19) 0.5% which was statistically
at par with thiourea (500 ppm).