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Response of T. Aman and Boro Rice to Residue Retention Under Strip Tillage

M. M. Hossain
Department of Agronomy, Bangladesh Agricultural University

M. Begum
Department of Agronomy, Bangladesh Agricultural University

M. M. Rahman
Department of Agronomy, Bangladesh Agricultural University

A. Hashem
Department of Agriculture and Food, Western Australia

Abstract/ Executive Summary:

An on-farm research was conducted at Gouripur upazila under Mymensingh district of Bangladesh during aman and boro season in 2013-14 to evaluate the performance of unpuddled rice cultivation. The rice var. Hybrid Krishan2 in aman and BRRI dhan28 in boro season were transplanted by two tillage practices viz., conventional tillage (CT) and strip tillage (ST) and two levels of crop residue i.e, no residue (R₀) and 50% residue (R₅₀). The experiment was designed in a randomized complete block design with four replications. ST yielded higher grains in aman season (5.67 t ha^-1) and also in boro season (4.70 t ha^-1) which were 9 and 13% higher compared to CT. Higher grain yield in ST leading to 26% higher BCR in aman and 23% higher in boro compared to CT. Retention of 50% residue increased by 5% yield in aman and by 4% yield in boro compared to no residue which contributed to 9% higher BCR in both aman and boro. ST combine with 50% residue retention yielded the highest grain yield in both of aman (5.97 t ha^-1) and boro season (4.81t ha^-1) which attributed to obtain the highest BCR in aman (3.08) and boro (2.78).

Keywords: Unpuddled transplanting, Conventional tillage, Strip tillage, Residue retention

Location: At farmer’s field of Durbacahra, Guipure, Mymensingh

Start Date: 00-07-2013

End Date: 00-11-2014

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was conducted to examine the performance of rice to unpuddled transplanting system with the retention of crop residues

Methodology:

The experiment was conducted at farmer’s field of Durbacahra, Guipure, Mymensingh, Bangladesh (the latitude of 24.75⁰ N and the longitude of 90.50⁰ E) during aman (July-Mid November) and boro (Mid November-June) season in 2013-14. This experimental area belongs to the Old Brahmaputra Floodplain which is characterized by dark grey non calcareous alluvium soils and these soils are mostly sandy loam under Sonatala series (Brammer, 1996). Climatic (rainfall and thermal condition) data were collected from the nearest weather station. The treatments were: (i) ipuddled condition conventional tillage (CT) and (ii) unpuddled condition strip tillage (ST) and two levels of crop residue viz., no residue (R₀) and 50% residue (R₅₀). The treatments were laid out in randomized complete block design with four replications using unit plots of 9 m × 5 m. In tillage practice, CT consisted of two passes primary tillage by two wheeler tractor (2 WT) and exposed to sun for two days followed by inundating whole plot and puddling by 2WT with two passes to complete land preparation. ST was done by Versatile Strip Tillage Planter (VSTP) in single pass operation before inundating the field. Three days before ST, pre-plant Glyphosate (Roundup) was applied @ 75 ml / 10 L water. After ST, the land was inundated with 3-5 cm standing water one day before transplanting operation for making the land soft enough to transplant seedlings (Islam et al., 2014). Twenty-five days old seedlings of rice var. Hybrid Krishan2 for aman season, and 40 days old seedlings of BRRI dhan28 for boro season were transplanted. Fertilizers were applied according to the recommendation of BRRI (2014). A spacing of 25 cm × 15 cm was maintained for both CT and ST with 2 or 3 seedlings hill^-1. The crops were harvested at maturity from 3m × 3m each and then data were recorded. Grain yields were adjusted to 14% moisture content. Data were subjected to ANOVA using MSTAT-C and means separated by Duncan's Multiple Range Test.

Source of Information: Bangladesh Agron. J. 2015, 18(2): 39-44

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the rice grain yield and BCR, it may be concluded that, unpuddled rice transplantation may be a good alternative to existing conventional practice. Farmers are likely to be benefited with the adoption of unpuddled system with the retention of crop residues.

Knowledge Management: Journal