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EFFECT OF VARIOUS PLANT GROWTH REGULATORS ON GROWTH, YIELD AND ITS ATTRIBUTES OF SUMMER GREENGRAM

KrishiKosh

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Title EFFECT OF VARIOUS PLANT GROWTH REGULATORS ON GROWTH, YIELD AND ITS ATTRIBUTES OF SUMMER GREENGRAM
 
Creator Shri V. K. Parmar
 
Contributor Prof. M. G. Dudhatra
 
Subject null
 
Description A field experiment was conducted on clayey soil of the Instructional Farm, Junagadh Agricultural University, Junagadh during summer season of the year 2004 to study the “Effect of various plant growth regulators on growth, yield and its attributes of summer greengram (Vigna radiata (L. Wilczek) cv. Gujarat Greengram–4.’’ The experiment was laid out in Randomized Block Design with three replications and fourteen treatments with T1 (control), T2 (with distilled water spray) and three plant growth regulators each at four levels T3 (GA3 20 ppm at 20 DAS), T4 (GA3 40 ppm at 40 DAS), T5 (NAA 20 ppm at 20 DAS), T6 (NAA 40 ppm at 40 DAS), T7 (Kinetin 25 ppm at 20 DAS), T8 (Kinetin 50 ppm at 40 DAS), T9 (GA3 20 ppm at 20 and 40 DAS), T10 (GA3 40 ppm at 20 and 40 DAS), T11 (NAA 20 ppm at 20 and 40 DAS), T12 (NAA 40 ppm at 20 and 40 DAS), T13 (Kinetin 25 ppm 20 and 40 DAS) and T14 (Kinetin 50 ppm 20 and 40 DAS).
The results indicated that spray of GA3 20 ppm at 20 and 40 DAS (T9) was significantly superior to rest of the treatments for growth parameters. The plant height was observed significantly highest (56.38 cm) at harvest in T9 (GA3 20 ppm at 20 and 40 DAS) over control. This treatment also showed maximum leaves per plant (20.44), leaf area index (5.73) and number of branches per plant (10.63) at harvest over control, which was statistically at par with the treatments T11 (NAA 20 ppm at 20 and 40 DAS).
Significantly highest number of pods per plant and number of grains per pod of 22.15 and 7.45 respectively, were recorded under NAA 40 ppm at 20 and 40 DAS application. This treatment also recorded significantly the highest grain weight per plant (6.023 g) and test weight (3.65 g) over control but it was statistically at par with the treatments T11 (NAA 20 ppm at 20 and 40 DAS).
Spray of NAA 40 ppm at 20 and 40 DAS recorded maximum grain yield of 1228 kg ha-1. Similar trend was also observed in case of stover (1890 kg ha-1) and Biological (3118 kg ha-1) yield of greengram, whereas, harvest index remained unaffected. The percentage increase in grain, stover and biological yield due to treatment T12 was to the tune 72.47, 53.91 and 60.72 per cent respectively, as compared to control (712, 1228 and 1940, respectively). Which was statistically at par with the treatments T11 (NAA 20 ppm at 20 and 40 DAS).
Protein content (20.11%)) in grain was significantly increased due to spray of NAA 40 ppm at 20 and 40 DAS, which was statistically at par with the treatments T11 (NAA 20 ppm at 20 and 40 DAS).
Significantly higher chlorophyll ‘a’ content 1.61 and 2.60 mg/g and total chlorophyll ‘a + b” content (2.30 and 3.41 mg/g) at 25 DAS and at harvest, respectively were recorded under the treatment T14 (Kinetin 50 ppm at 20 and 40 DAS) over control (1.18 and 2.22, 1.49 and 2.67 mg/g, respectively), whereas, chlorphyll ‘b’ content 0.69 and 0.81 mg/g at 25 DAS and at harvest, respectively as compared to control (0.31 and 0.45 mg/g, respectively).
In comparison to control, spray of NAA 40 ppm at 20 and 40 days after sowing recorded significantly the highest nitrogen content in grain (3.22 %) and stover (1.78 %) as well as total nitrogen (73.03 kg ha-1) uptake, which was statistically at par with the treatments T11 (NAA 20 ppm at 20 and 40 DAS).
Spray of NAA to the crop with 40 ppm at 20 and 40 DAS gave the highest gross (Rs. 26450 ha-1) and net returns (Rs15430 ha-1) with 1:2.40 cost benefit ratio (CBR) over control and rest of the treatments of plant growth regulators, but looking to the overall with net realization and CBR, it was observed that the application of NAA with 20 ppm at 20 and 40 DAS was superior over spray of 40 ppm NAA.
Thus, the present study indicated that the higher production and net profit from greengram could be secured by the application of NAA 20 ppm at 20 and 40 DAS under South Saurashtra Agro-climatic conditions. The treatment gave higher grain yield 1210 kg ha-1 which was 69.94 per cent higher than control (712 kg ha-1) and net realization Rs. 16026 ha-1 along with 1: 2.60 cost benefit ratio with net realization of Rs. 8558 ha-1 over control.
 
Date 2017-04-01T11:48:29Z
2017-04-01T11:48:29Z
2005-01
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/5810006628
 
Language en
 
Format application/pdf
 
Publisher JAU, JUNAGADH