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Seed Yield of Radish as Affected by Uprooting Time and Root Cutting

A. H. M. Shohidul Hoque
Department of Seed Technology, Bangabandhu Sheikh Mujibur Rahman Agricultural University; Gazipur, Bangladesh.

K. N. A. Jewel
Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University; Gazipur,Bangladesh.

M. A. Khaleque Mian
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University; Gazipur,Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during November 2005 to April 2006 to study the seed production potentiality of BSMRAU developed open pollinated radish varieties (viz., BU Mula 1 & BU Mula 2) under two levels of root cutting (viz., one third and no cutup) and three levels of uprooting namely 30, 40 and 50 days after sowing (DAS). Results revealed that both root cutting and uprooting days significantly influenced most of the characters pertaining to seed yield per plant. Root cutting delayed the flowering, pod initiation, maturation of siliqua and reduced plant height, number of branches per plant, number of siliqua per plant, and number of seeds per siliqua. The yields were also impaired by root cutting. In general, the entire yield components and seed yield were highly affected with the one third root cutting. Various uprooting days also had influenced these characters. In case of treatment combination of no cut and 30 days of uprooting there was significant difference between the varieties. The variety BU Mula 2 produced better seed yield per plot than BU Mula 1. Also in both the varieties the 1/3^rd cut treatment with 30 or 50 days uprooting sequence showed unsatisfied number of seeds per siliqua in comparison to the no cut treatment except 40 days uprooting.

Keywords: Radish, Root Cutting, Seed, Uprooting, Vegetable, Yield

Location: the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh

Start Date: 00-11-2005

End Date: 00-04-2006

Program Area: Seed Technology

Commodity: Radish

Objectives:

To study the effects of different levels of root cut and root cuts at different days after seed sowing on yield of radish seed.

Methodology:

The experiment was conducted at the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during November 2005 to April 2006. Two open pollinated varieties, viz., BU Mula 1 and BU Mula 2 were included in the study. The soil was silt loam in texture having acidic (pH=5.5) in nature, poor fertility status and impeded internal drainage.

The three-factor (variety, cutting, uprooting) experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. The unit plot size was 10 square meter.

Good quality radish seeds were sown in lines on 23^rd November, 2005 maintaining a spacing of 60 cm between rows. Each plot contained four rows and each row contained 12 to 15 plants before thinning. Finally, eight plants were allowed in each row after thinning.

Well decomposed cow dung was applied to the plots at the rate of 10 t/ha. Urea (375kg), Triple super phosphate (TSP, 225kg) and Muriate of potash (MP, 225kg) were applied for supplying N, P₂O₅ and K₂O, respectively. Borax was also used at the rate of 2.0 kg/ha for supplying boron. Half of urea and MP and total amount of TSP were applied in the plots during final land preparation; the remaining half of urea and MP were top-dressed in two equal splits at 3^rd and 5^th weeks after sowing of seeds (Anon. 1983). Borax was applied before flowering. Radish plants at the age of 30, 40 and 50 days were uprooted carefully. Uprooting was done early in the morning. Then the plants were given different root cuts as per treatment combinations (one third cut and no cut of roots) of the experiment immediately after uprooting. After cutting, they were planted again in the same plot maintaining same plant to plant distance (30 cm) and row to row spacing (60 cm). Irrigation was applied immediately after planting. Data were recorded from ten randomly selected plants from each plots on days to 50% flowering in plants, days to full blooming, days to pod initiation, days to 80% maturity, plant height, number of siliqua per plan, branches per plant, number of seeds per siliqua, seed yield per plant, seed yield per plot/ha. Data were analyzed using MSTAT-C software and the means were compared according to Duncan's Multiple Range Test

Source of Information: Azarian Journal of Agriculture, AJA. VOL (2) ISSUE 4, 2015: 91-98

Article Link (Online Journal): http://azarianjournals.ir/wp-content/uploads/aja15062201.pdf

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The variety, root cut and uprooting were considered as the three factors of the experiment, was laid out in the randomized complete block design (RCBD) with three replications. Each of the three factors comprised two levels of root cut, two levels of variety and three levels of uprooting days giving a total of 12 treatment combinations. The effects of root cutting and uprooting in case of both variety of BU Mula were highly significanct in all the characters. It was evident from the results that the combination of no root cutting with 30 days uprooting produced flowers earler than any of the other treatment combinations. The treatment receiving no root cut produced the tallest plants with maximum number of branches. Plant height and number of branches per plant decreased with the 1/3^rd root cut. The hight of plant was also affected by root cut. The number of siliqua per plant, number of seeds per siliqua and 1000 seed weight were significantly influenced by root cut with 40 days uprooting was found as the best in all these aspects. The yield of seed was significantly influenced by root cutting and uprooting. Types of root cutting at different growth stages exhibited significant influence for expression of all the characters in both BU Mula 1 and BU Mula 2. The treatment receiving no root cut with 40 days uprooting produced flower earlier, tallest plants with maximum number of branches, the number of siliqua per plant, and number of seeds per siliqua, yield of seed were significantly influenced. The best treatment combination of no root cut with 40 days uprooting yielded (210.0 g) seed per plot and 13.20g seed yield per plant. The treatment receiving one third cut with 50 days uprooting show poor performance for all the characters. The combination of no root cut with 40 days uprooting was found as the best in all these aspects.

Knowledge Management: Journal