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Evaluation of BRRI Aman Varieties and Early Rabi Vegetables for Aman-vegetable Cropping Pattern in Partially Irrigated Highland Ecosystem.

Satyen Mondal
Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Shila Pramanik
Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Md Saiful Alam Talukder
Senior Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Akhter Hossain Khan
Chief Scientific Officer
Rice Farming Systems Division, Bangladesh Rice Research Institute, Gazipur

Abstract/ Executive Summary:

Generally, early winter vegetable growing farmers keep their lands fallow in Kharif-II season which results low cropping intensity. In this ecosystem after harvesting of vegetables, there is little option to grow another crop in Kharif-I season. A short duration legume crop like summer mungbean, may be included for increasing cropping intensity of this ecosystem. Therefore, this study was undertaken to evaluate the agro-economic productivity of some BRRI Aman varieties with different growth duration as direct dry seeding and some early winter vegetables for Aman-Vegetable-Mungbean cropping pattern in partially irrigated highland ecosystem. In this study of evaluation of BRRI Aman varieties and early Rabi vegetables for Aman-Vegetable cropping pattern in partially irrigated highland ecosystem indicated that BRRI dhan33-Tomato-Mungbean produced the highest total REY, gross return and gross margin.

Keywords: Rice equivalent yield, DSR Aman, Cropping system

Location: BRRI farm, Gazipur

Start Date: 01-07-2009

End Date: 30-06-2010

Program Area: Farming System

Non-commodity: Rice, Cropping pattern

Objectives:

To identify DSR Aman varieties good fit for Aman-Rabi cropping systems

Methodology:

The experiment was conducted at BRRI experimental farm, Gazipur during Kharif-II 2009, Rabi 2009-10 and Kharif-I 2010 seasons. Five Aman rice varieties with different growth durations viz. BRRI dhan33 (118 days), BRRI dhan39 (122 days), BRRI dhan32 (130 days), BRRI dhan31 (140 days), and BRRI dhan44 (150 days) and three winter vegetables viz., tomato, red amaranth and bush bean were evaluated in split plot design with three replications. Mungbean was grown as a blank crop in Kharif-I season. Recommended management practices were followed for rice, vegetables and mungbean. Rice was sown on 23 June 2009 and harvested on 05 October to 29 October 2009 depending on the maturity of different varieties. Vegetables were established on 02 November to 19 November after harvesting of rice. Red amaranth was grown twice after BRRI dhan33 and BRRI dhan39. Vegetables harvesting was started in first week of December 2009 and continued up to third week of March 2010. Mungbean was sown from first week of March to last week of March 2010 and harvested on 18 May to 17 June 2010. Yield of different crops were compared in terms of total rice equivalent yield (REY). A simple economic analysis was done to evaluate the total productivity of DS rice-Vegetables-Mungbean cropping systems.

Source of Information: Proceedings of BRRI Annual Internal Review for 2009-2010

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest grain yield was produced by BRRI dhan31 (4.59 t/ha) followed by BRRI dhan33 (4.23 t/ha) and BRRI dhan39 (4.16 t/ha). Though the grain yields of BRRI dhan33 and BRRI dhan39 was lower than BRRI dhan31, the vegetable yields, irrespective of species, following these two varieties were higher which resulted significantly higher total REY. Moreover, red amaranth could be grown twice after BRRI dhan33 and BRRI dhan39 which contributed more to the total REY. Among the three vegetables, on an average yield of tomato, red amaranth and bushbean were 22.91, 6.49 and 2.91 t/ha irrespective of previous Aman rice varieties. Accordingly, Rice-Tomato-Mungbean cropping pattern resulted the highest REY (18.83 t/ha). The interaction effect of rice variety and vegetables were significant for total REY of different cropping patterns. The cropping pattern BRRI dhan33-Tomato-Mungbean produced the highest total REY (23.42 t/ha) and also was significantly higher than other tested cropping patterns. The Total variable cost (TVC) for tomato was higher than other crops. In case of cropping pattern, the highest TVC was incurred for Rice-Tomato-Mungbean cropping followed by Rice-Bush bean-Mungbean cropping pattern. The highest gross return, gross margin and BCR of 421560 Tk/ha, 279800 Tk/ha and 2.97 respectively, were obtained from BRRI dhan33-Tomato-Mungbean followed by BRRI dhan39-Tomato-Mungbean cropping pattern. The results revealed that direct seeding of short duration Aman rice, BRRI dhan33 and BRRI dhan39 were more suitable for growing vegetables in the following Rabi season. In spite of high production cost, the highest return was obtained from tomato after direct seeding of rice and mungbean could be grown successfully in the next Kharif-I season. BRRI dhan33-Tomato-Mungbean and BRRI dhan39-Tomato-Mungbean cropping patterns were more profitable followed by BRRI dhan32-Tomato-Mungbean-cropping patterns.

Knowledge Management: Report/Proceedings