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Plant Growth Regulators to Improve the Growth and Berry of Strawberry

M. NURUZZAMAN
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M.S. ISLAM
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

A.F.M. JAMAL UDDIN
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

S. SHILPI
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

H. MEHRAJ
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarami, Matsumaya, Ehime 790-8556, Japan

Abstract/ Executive Summary:

An experiment was conducted to study the influence of different growth chemicals on growth, fruit yield and quality attributes of strawberry. Different growth regulators such as, Gibberelic acid (GA3) (F1), 4-Chloro phenoxy acetic acid (4-CPA) (F2) and Flora (Nitrobenzene 20% w/w) (F3) were used as foliar feeding. To find out the effect of these growth chemicals only fresh water was used as control (F0). Among the growth regulators, GA₃significantly influenced the flower bud, number of flower and berry. Individual fruit weight (9.1 g) was highest in Flora but the highest total fruit weight (343.9 g) and degree of brix (6.8%) were with 4-CPA. Though Foliar feeding of GA₃ increases the various growth, flowering and fruiting attributes but 4-Chloro phenoxy acetic acid ultimately increases the total yield also degree of brix. So 4-CPA could be used for strawberry production to get higher yield.

Keywords: GA3, 4-CPA, Nitrobenzene, Yield, Quality

Location: Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka-1207

Start Date: 00-10-2009

End Date: 00-04-2010

Program Area: Crop-Soil-Water Management

Commodity: Strawberry

Objectives:

To study the influence of different growth chemicals on growth, fruit yield and quality attributes of strawberry

Methodology:

Experimental site, period, design and genetic materials: A pot experiment was conducted at the Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh from October, 2009 to April, 2010 using completely randomized design (CRD) with three replications. Strawberry cultivar “Festival” was used on the experiment which was collected from Krishibid Upokoron Nursery, Agargaon, Dhaka-1207, Bangladesh. Soil preparation and fertilization: Soil was prepared and pots were filled 7 days before transplanting. Cow dung @ 1 kg/pot and NPK were applied during the final soil preparation at the rate of N- 120 kg/ha (i.e., 0.5 g/pot), P- 60 kg/ha (i.e., 0.25 g/pot), K- 40 kg/ha (i.e., 20 g/pot). The whole amount of P and K were applied during final pot preparation. Urea was applied in 3 equal installments 30, 45 and 60 days after transplanting. pH of the soils were in between 6.0- 6.5. Saplings were planted at 20 October, 2009. Treatments of the experiment: Different growth regulators viz. F0; control (Fresh water), F1; Gibberelic acid (GA3), F2; 4-Chloro phenoxy acetic acid (4-CPA), F3; Flora (Nitrobenzene 20% w/w) had been used as foliar feeding.During fruit ripening, the experimental pots were covered with net to protect the fruits from bird, squirrel and rats. Experimental crop was infested by grey mold during the flowering stage. Disease was controlled by spraying Endofil M-45 (mancozeb 80%). Crop was also attacked by leaf feeder during the growing stage. The larvae were controlled by Pyrithrum @ 1.5 ml/L. Data collection: Plant height and crown length was measured in cm by using scale. Number of leaves, flower buds, flowers and fruits per plant were recorded by counting all the leaves and flower bud, flowers and fruits from each plant. Leaf area was measured by using Leaf Area Meter. Days to first inflorescence initiation, flowering, fruiting and fruit ripening was obtained by counting the days from date of transplanting the saplings. Brix percentage was measured by portable refractometer. Shelf life was measured at normal day temperature by keeping and observing the fruits quality and mean was calculated. Every fruit weight was obtained with the help of electric balance. Fruit length, diameter and pedicel diameter were measured by Digital Caliper-515 (DC-515) in millimeter. Strawberry generally grows determinate type and terminal inflorescence develop at the top of the primary crowns. The auxiliary buds differentiate just below the inflorescence on the primary crown and develop into secondary crowns. After several leaves have formed on the secondary crowns, the secondary inflorescence differentiate at their tops. Other auxiliary buds grow just below the second inflorescence and develop into the tertiary crowns and inflorescence. The primary, secondary, and tertiary inflorescence are called the first, second, and third fruit clusters, respectively, when the fruits are borne in each cluster. Total fruit weight of each pot was obtained by addition the weight of total primary, secondary and tertiary fruits. Fresh weight of each fruit was obtained from average fruit weight in the case of each type of fruits. Percentage of primary fruit, secondary fruit and tertiary fruits were calculated.Statistical analysis: Collected data for various characters were statistically analyzed using MSTAT-C programme. Differences between treatments were evaluated by Duncan?s Multiple Range test.

Source of Information: Int. J. Sustain. Crop Prod. 10(1):33-39, (February 2015)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that maximum total fruit weight and highest brix percentage and shelf life were provided by the foliar application of 4-CPA. Application of flora also performed well in case of individual fruit weight and shelflife but it provided maximum average fruit weight of secondary fruit. Foliar application of 4-CPA was found as best for production of strawberry.

Knowledge Management: Journal