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Effect of Tree Leaf Litter on the Yield and Yield Contributing Characteristics of T. Aman Rice Cv.br11

T.A. Khan
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

S.S.R.M.M.A. Sorwar
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

M.A. Mondol
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

J.M. Mazumdar
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The experiment was conducted in the Agroforestry Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to November 2009 to find out the response of different leaf litter on yield of rice (cv. BR11). The experiment included 15 different treatments i.e. T₀ (recommended fertilizers only), T₁ (100g Arjun leaf biomass), T₂ (150g Arjun leaf biomass), T₃ (300g Arjun leaf biomass), T₄ (100g Neem leaf biomass), T₅ (150g Neem leaf biomass), T₆ (300g Neem leaf biomass), T₇ (100g Pitraj leaf biomass), T₈ (150g Pitraj leaf biomass), T₉ (300g Pitraj leaf biomass), T₁₀ (100g Mahogany leaf biomass), T₁₁ (150g Mahogany leaf biomass), T₁₂ (300g Mahogany leaf biomass ), T₁₃ (100g Eucalyptus leaf biomass), T₁₄ (150g Eucalyptus leaf biomass) and T₁₅(300g Eucalyptus leaf biomass) replicated three times following RCBD. Results showed that the Neem (300g Neem leaf biomass) treatment gave the highest grain yield and that of Arjun was the lowest. There was no significant effect on 1000 grain weight. The highest grain yield (5.66 t ha^-1) was recorded in the treatment T₆ (300g Neem leaf biomass) followed by mahogany (second highest) treatment. Among the tree leaf biomass, Neem and Mahogany treatments were found the best. Thus it appears that tree leaf biomass could successfully be used as an alternative to chemical fertilizers.

Keywords: Leaf biomass, Grain yield, Leaf litter

Location: Agroforestry Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2009

End Date: 00-11-2009

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To observe the effect of tree leaf litter on the yield and yield contributing characteristics of T. aman rice cv.BR11.

Methodology:

The research was conducted at the Agroforestry Farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh during July-November, 2009. The land is situated on agro-ecological zone of the Old Brahmaputra Floodplain (No. 9) and it characterized by non-calcareous soil dark grey floodplain parent material old brahmaputra river borne deposits, the land is moderately well drained with a silt loam texture. The relief of the land is flat and above flood level and sufficient sunshine is available throughout the experiment period. The pH value of experimental soil ranged from 6.5 to 6.8. Rice cv. BR11 (Mukta), a modern variety of rice, was used as the test crop in this experiment. The variety was released from Bangladesh Rice Research Institute (BRRI) the cross between IR20 (IR532-E-576) and IR5 (IR5-47-2) rice. It grows well all over Bangladesh in aman season. BR11 prefers sandy loam to clay loam soil. Total growth duration of this variety ranges from 140¬ days from sowing to harvesting. It gives an average yield of 5.5 to 6.5 t ha^-1 under proper management. The experiment was conducted in a Randomized Complete Block Design (RCBD) with three replications. There were sixteen treatments. Each block was subdivided into sixteen unit plots. The treatments were randomly distributed to the unit plots in each block. The total numbers of plots were 48. The unit plot size was 1m x Im. The spacing between blocks was 100 cm and the plots were separated from each other by 40 cm space. Tree leaf biomasses like Arjun (Terminalia arjuna), Neem (Azadirachta indica), Pitraj (Aphanamixis polystachya), Mahogany (Swietenia macrophylla) and Eucalyptus (Eucalyptus camaldulensis) leaf biomasses were collected from the, Neem, Arjun, Pitraj, Eucalyptus and mahogany trees of Bangladesh Agricultural University Campus, Mymensingh. These leaf biomasses were chopped by hand and mixed uniformly with soil during final land preparation and then left to decompose for ten days. Fertilizers were applied in the controlled plot according to the recommended dose doses (Kg ha^-1): Urea; 180, TSP; 90, MOP; 40, Gypsum; 60, Zinc Sulphate; 10. The whole amount of various tree leaf biomasses such as Arjun, Neem, Pitraj, Mahogany and Eucalyptus leaves were incorporated in experimental plots before 15 days of final land preparation. Recommended dose of all fertilizers except urea were applied in control plots during final land preparation. Urea was applied top dressing in three equal installments i.e.15, 30 and 50 days after transplanting (DAT). Forty (40) days old seedlings of cv.BR11 seedlings were transplanted on 29 July 2009 with a hill to hill and line to line distance of 15 cm x 20 cm. Two or three healthy seedlings per hill were transplanted in all the plots. Necessary gap filling was done within 10 days of transplanting. Weeds were controlled by uprooting and removing from the field. Furadan (5G) was applied once with urea fertilizer during second installment of top dressing to control insect pests of rice. Crop was grown under rain fed condition. Prior to each top dressing, plots were weeding manually. The rice plants were harvested on 30 November 2009. The crop was harvested at its full maturity. The grain and straw were separated by hand threshing and plot wise weight of grain and straw were recorded in kg plot^-1. The grain and straw yields were expressed as t ha^-1. The weight of grains were recorded by an electrical balance and adjusted to 14% moisture level and expressed as t ha^-1. The data collected throughout the period of the experiment were computed and analyzed following the appropriate design of the experiment. The mean results were compared by Duncan's Multiple Range Test (DMRT) and ranking was indicated by letters.

Source of Information: J. Agrofor. Environ. 4 (2): 85-88, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that the combination of different leaf biomass with recommended fertilizer dose maximizing the rice yield and 300g Neem leaf biomass and 300g Mahogany leaf biomass were found the best.

Knowledge Management: Journal