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Effect of Tectona Grandis Leaf Litter on the Yield of Boro Rice and Subsequent Soil Improvement

M. S. I. Majumder
Department of Agroforestry, Bangladesh agricultural University.Mymensingh

G.M. M. Rahman
Department of Agroforestry, Bangladesh agricultural University.Mymensingh

M.W. Zaman
Department of Agricultural Chemistry, Bangladesh agricultural University, Mymensingh-2202

M. S. O. Mojumder
Department of Agroforestry, Bangladesh agricultural University.Mymensingh

M. M. Rahman
Department of Agroforestry, Bangladesh agricultural University.Mymensingh

Abstract/ Executive Summary:

A field experiment was carried out at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh during the period from January to May 2008 to study the effect of different doses of tree leaf litter on the yield and yield contributing characters of transplant Boro rice cv. BRRI Dhan28. The experiment was laid out in a Randomized Complete Block Design with four replications. There were five treatments viz. recommended fertilizer dose, 5 ton leaf litter ha^-1, 7.5 ton leaf litter ha^-1, 10 ton leaf litter ha^-1, 12.5 ton leaf litter ha^-1 in this experiment. Different Leaf litter doses of Tectona grandis significantly influenced the yield and yield contributing characters of transplant Boro rice cv. BRRI Dhan28. Highest amount of nutrients was released from 12.5 ton ha^-1 leaf litter and 5 ton ha^-1 was lowest. The highest grain yield (5.24 t ha^-1) was recorded under recommended fertilizer dose followed by 4.98, 4.78, 4.66, 4.50 obtained out of the treatments of 12.5 ton leaf litter ha^-1 (4.98 t ha^-1 ), 10 ton leaf litter ha^-1 (4.78 t ha-1) 7.5 ton leaf litter ha-1 (4.66 t ha^-1) and 5 ton leaf litter ha^-1(4.50 t ha^-1), respectively. Organic matter of the post harvest soil increased considerably due to the treatments as compared to initial soil.

Keywords: Tectona grandis, Leaf litter, Boro rice, BRRI dhan28

Location: Agronomy Farm, Department of Agronomy, Bangladesh Agricultural University, Mymensingh

Start Date: 00-01-2008

End Date: 00-05-2008

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To observe the effect of Tectona grandis leaf biomass on the yield and yield contributing characters of rice & to explore the possibility of organic method for increasing the fertility of soil

Methodology:

The experiment was conducted at the Agronomy Farm, Department of Agronomy, Bangladesh Agricultural University, Mymensingh during January to May 2008. The rice cv. BRRI dhan28 was used as the test crop. The experiment was conducted in a Randomized Complete Block Design (RCBD) with four replications. Each block was subdivided into 5 unit plots. The total numbers of plots were 20. The unit plot size was 1m × 1m. Five different treatments were randomly distributed to the unit plots in each block. Treatments (Different doses of Tectona grandis leaf litter) were, D₀ = Recommended fertilizer dose, D₁ = 5 ton leaf litter ha^-1, D₂ = 7.5 ton leaf litter ha^-1, D₃ = 10 ton leaf litter ha^-1, D₄ = 12.5 ton leaf litter ha^-1. Tree leaf biomass of T. grandis was collected from the Bangladesh Agricultural University Campus, Mymensingh. T. grandis leaf biomasses were dried for some days then made it dust form, finally mixed uniformly with soil during final land preparation and then left to decompose. The leaf biomasses were incorporated in different plot before 10 days of transplanting. Forty (40) days old seedlings were uprooted & transplanted on 14 January 2008. Two healthy seedlings per hill were transplanted in all the experimental plots. The rice plants were harvested on 28 April 2008. The crop was harvested at its full maturity. The yield contributing characters viz. plant height (cm), number of total tillers hill^-1, number of effective tillers hill^-1,non effective tiller hill^-1,, panicle length (cm), number of grains panicle^-1,1000-grain weight (g), grain and straw yield (t ha^-1), biological yield (t ha^-1), harvest index(%) were recorded. The grain and straw were separated by hand threshing and plot wise weight of grain and straw were recorded in kg plot^-1and converted as t ha^-1. The post harvest soil samples were collected to analyze N, P, S, and K etc. Data were analyzed using a computer package programme MSTAT-C, and mean differences were adjudged by Duncan’s Multiple Range Test.

Source of Information: J. Agrofor. Environ. 2(1): 1-6, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Yields under different treatments almost statistically similar with recommended yield of rice (BRRI dhan28). This indicates T. grandis leaf litter can release sufficient nutrients to the soil which is required rice cultivation.

Knowledge Management: Journal