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Effect of Tillage Options and Straw Management on Crop Productivity and Soil Fertility in Rice-wheat-mungben Cropping Pattern

M. Ilias Hossain
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute , Shyampur, Rajshahi-6212

M. Israil Hossain
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute , Shyampur, Rajshahi-6212

M Nur-E-Alam Siddquie
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute , Shyampur, Rajshahi-6212

Abstract/ Executive Summary:

An experiment was conducted to study the productivity, soil fertility and N-use efficiency of intensified rice-wheat (RW) systems by adding a third pre-rice crop of mungbean. System productivity, fertility and N use efficiency were evaluated under three N fertilizer levels (80,100 and 120%) N of recommended dose, two levels of straw retention (0 and 30%) and three tillage options (permanent raised bed, fresh bed and conventional tillage practice (CTP) in a RW- Mungbean cropping system. Fresh bed with 30% straw retention produced highest productivity and similar results were also obtained from permanent beds with 30% straw retention. Fresh bed with 120% recommended N produced the highest productivity for wheat which were similar to permanent bed with 120% N.

Keywords: Soil Fertility, Rice, Wheat, Mungbean, Performances

Location: Regional Wheat Research Centre, Shyampur, Rajshahi,

Start Date:

End Date:

Program Area: Farming System

Commodity: Soil fertility

Objectives:

1. To Know the performances of bed planting system over conventional

2. To determine the effect of N fertilizer on yield and estimate N-use efficiency

3. To increase soil fertility

4. To increase total crops productivity of rice-wheat system

Methodology:

A cool season wheat (Triticum aestivum)-spring mungbean (Vigna radiata)-monsoon rice cropping pattern was implemented starting with wheat sown in November 25, 2010 at the Regional Wheat Research Centre, Shyampur (RWRC), Rajshahi, Bangladesh (24°3'N, 88⁰41E, 18 m above sea level). The site has a subtropical climate and is located in Agro ecological Zone 11 (High Ganges River Flood Plan) on flood-free high land, with course- textured, highly permeable soil. The area receives 1,257 mm mean annual rainfall, about 97% of which occurs from May to September. Total rainfall was highest during the mungbean season and lowest in the wheat season in all years. Wheat (Variety Prodip) was planted at the nationally recommended seeding rate of 100 and 120 kg/ha for beds ad conventional layout, respectively, in early December (2 December, 2010 and 2011) and harvested in late March (28 March, 2011 and 2012). After harvest of wheat, mungbean (Vigna radiata) were planted at the same time at the nationally recommended seeding rate of 25 kg/ha for mungbean in early April (CV. BARl Mung-6) for both beds and conventional layout. The trial was originally established as a PRB experiment with two straw management practices (main plots-30% straw retention (SR) and 0% SR) and five N levels (subplots 80%, 100%, and 120% of recommended). The area of each subplot was 15 m² (5m x 3m). The recommended rate of N (100 kg/ha for wheat) was applied as urea. With wheat, two-thirds of the N was applied before seeding and the remaining one- third at crown root initiation (CRI) (Zadoks growth stage 1.3). Sufficient irrigation water was applied to fill the furrows between the raised beds. The flat plots were flood irrigated. The wheat received three irrigations at CRI (Z1.3), booting (Z4.0-4.9) and grain-filling stages (Z8.0-8.9). Generally, both CTP and PRB were irrigated on the same days, but less water was needed to fill the furrows with PRB compared to CTP. Manual weed control was done after the first irrigation for wheat.

Source of Information: Annual Research Report 2011-2012, RWRC, BARI, Rajshahi, Page:27-31, Publication June 2012

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Fresh bed with 120% N application was found maximum grain yield but statistically similar yield were also found from fresh bed and permanent bed with 100 and 120% N application. It was also similar with conventional with 120% nitrogen application. It was first year experiment. So, it needs long term study for getting the benefit of straw retention with zero tillage situation.

Knowledge Management: Report/Proceedings