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Effects of Rice Straw, Sesbania and Sulphur on the Growth and Yield of Rice and Soil Health

S.A. Hague
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

M.J.U. Khan
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

A field experiment was carried out on an Old Brahmaputra floodplain soil at Bangladesh Agricultural University Farm, Mymensingh to study the effect of rice straw, sesbania and sulphur on the growth and yield of rice and post-harvest soil characteristics. The results indicated that the dry matter yields of rice plants at maximum tillering stage and panicle emergence stage increased significantly due to the application of rice straw, sesbania and sulphur over the control treatment. Similar results were observed in grain and straw yields of rice. The highest grain yield of 6.733 t ha-1 was recorded in the treatment, where rice straw and sulphur were applied together and it was statistically identical with that of sesbania and sulphur fertilizer applied together (6.640 t ha-1). The minimum grain yield of rice was recorded in the control treatment- (4.640 t ha-1). The application of rice straw, sesbania and sulphur improved soil quality, particularly when S was applied in combination with either rice straw or .sesbania. In postharvest soils, Al was slightly lowered, while organic matter content, total N, available P and available S contents increased significantly under sesbania and rice straw applied together with S.

Keywords: Rice straw, Sesbania, Sulphur, Rice production, Soil quality

Location: Bangladesh Agricultural University farm, Mymensingh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice, Green manuring, Soil Health

Objectives:

Sustainable increased rice production in Bangladesh could be possible through the integrated use of organic materials such as rice straw/green manure and sulphur along with NPK and in specific cases with micronutrients, such as Zn and B. It not only provides greater stability in crop production but also maintains higher soil fertility status. The objective of the present investigation was thus, to study the impact of the application of rice straw, sesbania and sulphur along with NPKZn on the growth and grain yield of rice as well as on soil quality.

Methodology:

The experiment was carried out at Bangladesh Agricultural University farm, Mymensingh under the soil series, `Sonatola' and Agro-ecological zone of Old Brahmaputra Floodplain. The experiment was conducted in the Aman season (July-November) of 2002. The soil was, characterized by silt loam in texture with pH 6.8, organic matter content 2.04%, CEC 12.80 rp.e.°/0, total N 0.20%, available P 11.00 ppm, exchangeable K 0.15 m.e.°/0 and available S 13.50 ppm.

Treatments used in the experiment were: T1 — Control, T2 - Rice straw @ 6 t ha-1, T3 — Sesbania @ 6 t ha-1, T4 - Sulphur @ 20 kg S ha-1, T5 - Rice straw @ 6 t ha-1 and S @ 20 kg S ha-1 and Sesbania @ 6 t ha-1 and S @ 20 kg S ha-1. Rates of fertilizers used were urea @ 100 kg N, TSP @ 60 kg P2O5, MP @ 40 kg K2O, and ZnO @ 3 kg Zn per hectare. Sulphur was applied from gypsum. One-third of urea along with all other fertilizers including gypsum was applied as basal at the final land preparation. The remaining two-thirds of urea were top dressed in two equal splits at 30 and 60 days after transplanting of rice seedlings. Rice straw and sesbania were chopped into small pieces and then incorporated in the soil two weeks before the transplanting of rice seedlings. Seedlings of 35 days old were transplanted in the experimental plots on 12 August 2002. The plant spacing used was 20cm x 20cm. The experiment was laid out in a completely randomized block design with three replications of each treatment. BRRI Dhan 30 was used as the test crop. 10 hills per plot were collected randomly for dry matter analysis (oven-dry basis) at maximum tillering and panicle emergence stages. Data on yield contributing characteristics were recorded similarly from 10 hills randomly collected from each plot at the harvest stage.

Source of Information: J. Bangladesh Agril. Univ. 4(1): 51-55, 2006 ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The investigation indicates that the application of organic materials such as sesbania and rice straw as well as S with the usual practice of NPK application can greatly increase rice production and improve soil health,

Knowledge Management: Journal