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Double Transplanting of Boro Rice Increased System Productivity of T. Aman-potato-boro Cropping Pattern

Amina Khatun
Rice Farming Systems Division, Bangladesh Rice Research Institute. Gazipur 1701, Bangladesh

A. H. Khan
Rice Farming Systems Division, Rice Research Institute. Gazipur 1701, Bangladesh

M. A. Saleque
Soil Science Division, Rice Research Institute. Gazipur 1701, Bangladesh

Abstract/ Executive Summary:

Under irrigated condition, double transplanting (DT) of Boro rice in a T. Aman-Potato-Boro cropping pattern may be an alternative option either to reduce the yield loss of late planted Boro rice or to keep it at a minimum level. An experiment was conducted during 2003 - 2006 at Gazipur and Kapasia with three cropping patterns. The patterns were: T. Aman- Boro- Fallow (CPI), T. Amari-Potato- Bora (CP2) and T. Amari- Potato- double transplanted (DT) Boro (CP3). Rice varieties were BRRI dhan44 and BRRI dhan29 for Aman and Bora seasons, respectively; while Diamont was the potato variety. Rice equivalent yields (REY) in CP2 and CP3 were 82 and 109% higher than that in CPI at Gazipur, whereas those were 122 and 179% higher at Kapasia. The increase of REY in CP2 was attributed to higher potato yield and that in CP3 was due to higher yield of potato and Bora rice. Double transplanting of Boro in CP3 facilitated greater yield of potato and realized almost similar yield of Boro that was obtained in CPl. Economic analysis showed that the gross margin was the highest in CP3 (USS 1797 and 2720 at Gazipur and Kapasia, respectively). CP3 may be recommended for medium high lands of Bangladesh and other Asian rice growing countries.

Keywords: Boro, Double transplantation, Cropping pattern and Potato

Location: Bangladesh Rice Research Institute

Start Date: 00-00-2003

End Date: 00-00-2006

Program Area: Farming System

Commodity: Rice, Potato

Objectives:

To examine the effectiveness of double transplanting of Boro rice on the growth and yield of Boro itself and system productivity of T. Aman-Potato-Boro cropping pattern.

Methodology:

The study was conducted at the Bangladesh Rice Research Institute (BRR[) experimental farm (24° 0' N, 30°30' E), Gazipur and in Farmers' field at Kapasia, Gazipur (24° N, 90°43' E) for three years during 2003 - 2006. Experimental fields in both the locations have silt loam texture and free from normal flooding. Three cropping patterns, T. Aman- Boro- Fallow (CPI), T. Aman-Potato- regular Boro (CP2) and T. Aman- Potato- double transplanted (DT) Boro (CP3) were evaluated. The rice varieties were BRRI dhan44 and BRR[ dhan29 in T. Aman and Boro season, respectively. The potato variety was Diamont. The seed rate for rice was 30 kg ha^-I and that for potato was 1500 kg ha-I. The experiment was laid out in a Randomized Complete Block Design with four replications. T. Aman rice was transplanted during 15-20 July with 30-day old seedlings at 2-3 seedlings hill and harvested during 15-20 November. Potato was planted during 29 November to 5 December with spacing of 45 x 15 cm and harvested in 151 week of February for CP2 and 3^rd week of February for CP3. Potato planting after T. Aman harvest was delayed due to shower during second fortnight of November in each year. Boro rice was transplanted during 10-14 January with 40- 45 day-old seedlings for CPl. The seedling age of Boro rice for CP2 was 70-75 days. I n case of CP3, first transplanting was done with 40-day old seedlings during 10-14 January in the separate small intermediate plots maintaining 10 x 10 cm spacing with 10-12 seedlings hill^-I. After harvesting of potato, tillers of first planted Boro rice from intermediate Field were taken out at 43-45 days after transplanting (OAT) and were transplanted in the main fields during 26-27 February with 20 x 15 cm spacing and at 5-6 seedlings hill^-1. Tillers of the 1^st transplanted rice covered approximately 6 times in the main field of 2^nd transplanting.

Source of Information: The Agriculturists, Vol: 5, (No-1&2), pp: 86-94, Dec 2007

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Double transplanting of Boro was found to be an effective crop establishment method for accommodating a potato crop in between two rice crops in medium high land provided there was irrigation facility. The method was found profitable and thus, it may be a good option for higher return for marginal rice growers in Bangladesh. In medium high land, double transplanting of Boro rice can be practiced as a potential option for optimizing the productivity of CP2. Regardless of locations and years, the highest REY and gross margin were obtained from CP3 followed by CP2. There is scope of substantial improvement of the productivity of the ecosystem with the inclusion of DT in Boro rice

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