Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effect of Growth Regulators on the Growth and Yield of Cowpea (vigna Unguiculata (l.) Walp.).

M. J. Ullah
Professor
Department of Agronomy, Sher-e-Bangia Agricultural University, Dhaka 1207

F. Hossain
Professor
Department of Botany, University of Dhaka, Dhaka

Q. A. Fattah
Professor
Department of Botany, Jahangirnagar University, Dhaka

Abstract/ Executive Summary:

A field experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka, with two growth regulators - Potassium naphthenate (KNap) and Naphthalene acetic acid (NAA) on cowpea cv. Bari Falon- 2 under irrigated condition. Three concentrations of KNap (1200, 1300 and 1400 ppm) and two concentrations of NAA (40 and 50 ppm) along with control were tested. Results showed that the highest plant height was obtained when NAA was applied at the concentration of 50 ppm (91.57 cm). Irrespective of treatment, dry matter (DM) increased progressively up to 105 DAS. The treatments 1300 ppm of KNap, 50 ppm of NAA and the combination of 1200 ppm of KNap with 30 ppm ofNAA were at par and showed significant higher dry matter. yield attributes and yield. The highest values of dry matter/plant (60.85 g). pod length (14.25 em), number of pods/ plant (13.03). number of seeds/ pod (10.96), 1000 seed weight (125 g), seed yield/ plant (17.85 g), seed yield/ ha (1820 kg) and harvest index (37.90 %) were obtained with KNap 1300 ppm.

Keywords: Cowpea, Vigna unguiculata, Height, Dry matter, Yield attributes

Location: Sher-e-Bangia Agricultural University Farm, Dhaka

Start Date: 01-01-2001

End Date: 30-06-2002

Program Area: Variety and Species

Commodity: Cowpea

Objectives:

To evaluate the effects of KNap and NAA on the growth and yield of cowpea.

Methodology:

The study was carried out at Sher-e-Bangia Agricultural University Farm, Dhaka 1207 during the rabi season of 2001- 2002. BARI Falon- 2 was used as test crop under irrigated conditions. Two growth regulators - potassium naphthenate (KNap) with three concentrations viz. 1200 (T₁), 1300 (T₂) and 1400 (T₃)) ppm and naphthaline acetic acid (NAA) with two concentrations viz. 40 (T₄) and 50 (T₅) ppm; and six combinations of KNap 1200 - 1400 ppm with NAA30 - 40 ppm, namely, KNap 1200 NAA30 (T₆), KNap 1200 NAA40 (T₇), KNap 1300 NAA30 (T₈), KNap 1300 NAA40 (T₉), KNap 1400 NAA30 (T₁₀) and KNap 1400 NAA40 (T₁₁) along with control (T₀) were used. The experiment was laid out in a randomized complete block design with three replications. The unit plot size was 5 m X 4 m. The land was opened by a disc plough and finally prepared by three subsequent ploughing with a country plough. At the final land preparation, nitrogen, phosphorus, potassium, boron, sulfur and zinc at the rate of 20 kg N, 50 kg P₂O₅, 40 kg K₂O, 0.60 kg B, 18.0 kg S and 2 kg Zn/ ha were applied in the form of urea, triple super phosphate, muriate of potash, borax, gypsum and zinc sulfate respectively. Seeds were sown on November 15 maintaining row to row distance and plant to plant distance 50 and 20 cm respectively. The depth of sowing was 2 - 3 cm. Growth regulators as per treatments were sprayed on the aerial parts of the plants at 45 days after sowing (DAS). Data on plant height and total dry matter were taken from the ten plants which were selected randomly from each plot at 60, 75, 90 and 105 DAS which were the stages of onset of branching, onset of flowering, pod formation and maturity respectively. Data on pod length was taken at 75, 90 and 105 DAS. At harvest - number of pods/ plant, number of seeds/ pod and 1000 seed weight were collected. Data on yield/ ha and harvest index were taken from the samples, which were harvested at maturity from the pre- demarcated area at the middle of each plot. Data were statistically analyzed and means were compared by LSD at 5 per cent level of significance.

Source of Information: JOURNAL OF SHER-E-BANGLA AGRICULTURAL UNIVERSITY, Vol. 01 (1), July 2007, pp. 08-13.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

By evaluating the above results, it may be concluded that the NAA treated plants had higher plant height than the KNap treated ones. Among the treatments studied, KNap 1300 (T₂) showed highest values of dry matter, pod length, number of pods/ plant, number of seeds/ pod, 1000 seed weight, seed yield/ plant, seed yield/ ha and harvest index. The treatment NAA50 (T₅) had highest values among the NAA treatments, which was also at par with KNap 1300. Combination also increased the values of dry matter, all the yield attributes and yield in comparison to the control. Among the combination treatments, KNap 1200 NAA40 (T₆) gave the highest values which was at par with KNap 1300 and NAA50.

Knowledge Management: Journal