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Seedling Age Influence Rice (oryza Sativa L.) Performance

A.K.M. Khusrul Amin
Water Resources Planning Organization, House No. 103, Road No. 1, Banani, Dhaka-1213, Bangladesh

M. Aminul Haque
Water Resources Planning Organization, House No. 103, Road No. 1, Banani, Dhaka-1213, Bangladesh

Abstract/ Executive Summary:

An experiment was carried out at the field laboratory of the Department of Agronomy,Bangladesh Agricultural University, Mymensingh during July to December, 2001. Two indigenous varieties, viz.: Kalizira and Tulshimala, and two improved varieties, viz.: BRRI dhan38 and BRRI dhan37, with four different aged seedlings, viz.: 15, 25, 35, and 45 days old, were transplanted on the same day maintaining 25 cm x 15 cm spacing. The highest plant height was observed in BRRI dhan37 followed by Tulshimala and Kalizira among 35-day old seedlings at 60 days after transplanting (DAT). But during harvest, 35-day old Kalizira seedling gave the highest plant height. BRRI dhan38 and BRRI dhan37 seedlings, both 35 days old, produced the highest number of tiller hill^-1 at all DATs except 15 DAT. But during harvest, only BRRI dhan38 with 35-day old seedling gave the best result. The highest LAI (Leaf Area Index) was found in BRRI dhan38’s 35-day old seedling at 45, 60, and 75 DAT. However, at 15 DAT, BRRI dhan37’s 45-day old seedling showed the highest value of LAI. Kalizira’s 45-day old seedling gave the lowest LAI at 75 DAT which was statistically similar to Tulshimala with 15 days old seedling. The highest grain yield (4.30 t ha^-1) was found in BRRI dhan38’s 35-day old seedling, followed by BRRI dhan 37’s with the same age of seedling (4.00 t ha^-1). The study also revealed that the overall performance of indigenous varieties were better with 35 days old seedlings.

Keywords: Growth, LAI, Plant height, Spacing, Variety, Yield

Location: Field laboratory of the Department of Agronomy, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2001

End Date: 00-12-2001

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

Objective of the study was to find out the effects of seedling age on rice cultivars

Methodology:

Experiment site: The experiment was conducted at experimental field of Bangladesh Agricultural University, Mymensingh. The experiment field was a medium low land, fairly leveled with silty loam texture soil having a pH value about 6.42. Treatment: There were two set of treatments in the experiment, viz. variety and seedling age. Four varieties including Kalizira (V₁), BRRI dhan38 (V₂), BRRI dhan37 (V₃), and Tulshimala (V₄) were selected for the experiment. These four varieties were transplanted with four different seedling ages, i.e., 15 days (D₁), 25 days (D₂), 35 days (D₃), and 45 days (D₄) in the experimental plot. In this experiment, two indigenous, viz.: Kalizira, Tulshimala, and two improved, viz.: BRRI dhan38 and BRRI dhan37, popular fine rice varieties were selected. Experimental design and lay out: In the experiment, a randomized complete block design was followed with three replications. Treatment combinations were assigned at random within a block. Separate randomization was carried out for other blocks. Each plot size was 4.0 m x 2.5 m; total numbers of plots were 48; and the individual plot and the block were separated for irrigation and drainage by 0.5 m and 1.0 m channel, respectively. Land preparation and other activities: The experimental plot was well prepared for seedling transplantation using modern technology. Fertilizers were applied at the rate of 120, 100, 70, 60, and 10 kg ha^-1 of urea, triple super phosphate, muriate of potash, gypsum, and zinc sulphate, respectively, at the time of land preparation and different stages of plant growth. Seedlings at 15, 25, 35, and 45 days old were transplanted in the well puddled experimental plots maintaining proper spacing (25 cm x 15 cm) and plant density. Different intercultural operations were done properly. Harvest and post-harvest operations were performed accordingly. Data collection: Average plant height was recorded from 10 randomly selected plants in each plot. Yield and yield contributing data were collected. Statistical analysis: The collected data were statistically analyzed using ANOVA technique with the help of computer package program MSTAT. The significance of mean differences was determined via DMRT.

Source of Information: Philippine Journal of Science, 138 (2): 219-226, 2009

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

35-day old seedling was better than those of relatively younger (15- and 25-day old) and older (45-day old) seedlings.

Knowledge Management: Journal