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Validation of Planting Density on the Growth and Yield of Modarn Rice in T. Aman Season at BARIsal Region

Md. Abu Bakar Siddique Sarker
Principal Scientific Officer
Agronomy Division, BRRI, Gazipur-1701

M.I.M. Akhand
SSO
Agronomy Division, BRRI, Gazipur-1701

Abstract/ Executive Summary:

The tallness of plant slightly varied due to the variation of planting density. The tallness of plant was higher at Uzirpur than that of Amtoli location. Probably this was due to the higher soil fertility at Uzirpur. The number of panicle per unit area varied significantly due to the variation of planting density at both the locations. The significantly highest number of panicle was recorded in closer spacing at 20- × 20 cm over farmers practice at both the locations. The grains/panicle varied significantly among the treatments and higher number of grains per panicle was found at wider spacing (20-25 hill/m²). The spikelet sterility (% varied at Amtoli area. Higher spikelet sterility was found at closer spacing 15- × 20 cm and farmer’s practices at both the locations. The variation of grain yield among the treatments was statistically significant. The highest grain yield was found in wider spacing (20-25 hill/m²) due to higher number of panicle per unit area, grains per panicle and low spikelet sterility at both the locations. On the contrary, the lowest grain yield was recorded in farmers practice due to lower number of panicles per unit area and less grains per panicle at both the locations.

Keywords: Planting density, Closer spacing, Wider spacing

Location: Farmer's field at Uzirpur, Barisal and Amtoli, Barguna

Start Date: 01-06-2013

End Date: 31-01-2014

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The experiment was conducted for caring out the yield response of T. Aman rice at different plant spacing.

Methodology:

Plant spacing is an important factor, which plays a significant role on growth, development, and yield of rice at its optimum level. Beside that it provides scope to the plants for efficient utilization of solar radiation, nutrients, air and light. As a result, plant becomes weaker, thinner and consequently reduces yield. Under closer plant spacing, farmers cannot get desired hills/unit area which also ultimately reduces yield. Closer spacing also hampers intercultural operations. Therefore, proper manipulation of planting density may lead to increase the economic yield of T. Aman rice. Farmers of tidal non saline areas grow rice with wider spacing. Wider spacing gave better grain filling due to lesser competition among the plants for light, space water and nutrition. A few researchers found higher grain yield up to certain level of wider spacing and others reported the higher grain yield at closer spacing. experiments were conducted at Uzirpur, Barisal and Amtoli, Barguna in Aman season, 2013. Seedlings were transplanted spaced at i) 25- × 20 cm (20 hills/m2), ii) 15- ×20 cm (35 hills/m2), iii) 20- × 20 cm (25 hills/m2), iv) 25- × 15 cm (28 hill/m2) and iv) Farmer’s practice 25- ×20 cm. The tested variety was BRRI dhan44 in Uzirpur, Barisal and BRRI dhan49 in Amtoli, Barguna. The experiments were laid out in RCB design with three replications. Thirty-day-old seedlings were transplanted. The fertilizers were applied at TSP 75 kg ha-1, MOP 60 kg ha-1, Gypsum 50 kg ha-1 and ZnSO4 5 kg ha-1 during final land preparation. The Urea was top dressed in three equal splits at 202 kg ha-1 at 15, 30 & 45 DAT. Irrigation, insect and weed control were done as and when necessary. Data on plant height, panicle no. m-2, grains panicle-1, sterility (%) and grain yield were recorded at harvest.

Source of Information: BRRI Anual Internal Review, 2013-2014

Article Link (Online Journal):

Funding Source:

1.	Budget: 20000/-

Total Budget (Tk.) : 20000/-

Achievement/Findings:

In the farmers field of Uzirpur and Amtoli wider spacing (20-x20 cm and 25-x20 cm) gave the highest grain yield due to higher number of panicle m^-2.

Knowledge Management: Report/Proceedings