PERFORMANCE OF PLANT GROWTH REGULATORS ON YIELD AND QUALITY OF FODDER OAT
Loading...
Date
2021
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DRPCAU, PUSA
Abstract
A field experiment was carried out during Rabi season of the year 2020-2021 at Forage Research Block of Cattle Farm, APRI, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar to study the performance of plant growth regulators on yield and quality of fodder oat. The experiment was laid out in randomized block design with eleven treatments with three replications by using Bundel Jai 822 (JHO-822) as a test crop. The treatments comprised of foliar sprays of different plant growth regulators (T1-triacontanol @ 10 ppm, T2-triacontanol @ 20 ppm, T3-mepiquat chloride @ 200 ppm, T4-mepiquat chloride @ 300 ppm, T5-salicylic acid @ 100 ppm, T6-salicylic acid @ 200 ppm, T7-NAA @ 20 ppm, T8-fenoxaprop-P-ethyl @ 4 g a.i./ha, T9-gibberellic acid @ 200 ppm, T10-gibberellic acid @ 400 ppm and T11-spray of water) given at 30 days after sowing.
The results obtained from the experiment revealed that foliar application plant growth regulators at 30 DAS had a prominent influence on growth characters i.e., plant height, number of tillers, leaf dry weight, stem dry weight, total above ground dry matter accumulation, leaf to stem ratio and relative chlorophyll content at 60 DAS and at harvest. Application of naphthalene acetic acid @ 20 ppm recorded the maximum growth parameters i.e., number of tillers per meter row length (150.1), leaf dry weight per meter
row length (54.3 g) at 60 DAS and at harvest and relative chlorophyll (43.31 SPAD) content at 60 DAS compared to other treatments. Whereas, stem dry weight per meter row length (166.3 g) and total above ground dry matter accumulation (216.8 g) at harvest was recorded maximum with mepiquat chloride @ 300 ppm. However, the effect of plant growth regulators on the plant height and leaf to stem ratio was found to be non-significant at harvest.
The yield parameters such as green fodder yield and dry fodder yield was significantly influenced by the application of plant growth regulating chemicals. Application of mepiquat chloride @ 300 ppm recorded the maximum green fodder yield (43.1 t/ha) and dry fodder yield (6.9 t/ha).
Result of N, P and K uptake and quality parameters revealed that application of naphthalene acetic acid @ 20 ppm recorded the highest nitrogen (1.67%). phosphorous (0.33%) and potassium (1.79%) content and nitrogen (113.2 kg/ha) and phosphorous (22.6 kg/ha) uptake. Whereas, the maximum potassium uptake (121.4 kg/ha) was recorded with mepiquat chloride @ 300 ppm. Quality parameters i.e., crude protein content (10.45%), crude protein yield (0.71 t/ha) and ash content (8.69%) recorded highest values with the application of naphthalene acetic acid @ 20 ppm.
Application of naphthalene acetic acid @ 20 ppm at 30 DAS recorded the highest net return (Rs.31118/ha) and B: C ratio (2.01) among the treatments.
Application of Fenoxaprop-P-ethyl @ 4 g a.i./ha at 30 DAS recorded the lowest growth attributes, yield, nutrient uptake, quality parameters, net returns and benefit to cost ratio.