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Productivity of Potato-boro Rice Cropping Pattern in Haor Ecosystem

Md. Mahboob Karim
PhD Fellow
Department of Crop Botany, Faculty of Agriculture, Bangladesh AgriculturalUniversity, Mymensingh-2202.

Md. Sultan Uddin Bhuiya
Department of Agronomy, Faculty of Agriculture,Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

SM Altaf Hossain
Department of Agronomy, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Abstract/ Executive Summary:

A study was conducted at PurbaTethulia village, in Dingaputa haor of Mohangonj Upazila in Netrakona district during the period from October 2011 to April 2012. The objective of the study was to diversify and intensify crops in the research site and to develop a more productive cropping pattern. In the trial, Potato-Boro rice-Fallow cropping pattern was followed. The experiment was laid out in a randomized complete block design with five replications. The agronomic productivity (rice equivalent yield t ha^-1) of the Potato-Boro rice-Fallow cropping pattern was 24.32 t ha^-1with economic productivity (gross margin Tk ha^-1) of 163210 and the benefit cost ratio of 1.80. Potato-Boro rice pattern may be disseminated in haor areas of similar environment.

Keywords: Cropping pattern, Ecosystem, Flash flood, Potato, Boro rice

Location: PurboTethulia village situated in the eastern side of Mohanganj upazila of Netrakona district, a village and ward of Tethulia union in Dingaputa haor.

Start Date: 00-10-2011

End Date: 00-04-2012

Program Area: Farming System

Commodity: Potato, Rice

Objectives:

To diversify and intensify crops in the research site and to develop the multiple cropping patterns.

Methodology:

The experiment was carried out at PurboTethulia village situated in the eastern side of Mohanganj upazila of Netrakona district, a village and ward of Tethulia union in Dingaputa haor, during the period from October 2011 to April 2012. The experimental site was a representative of flood prone haor area which covered 932793 ha i.e. about 6.5% area of Bangladesh. The experiment was laid out in a randomized complete block design with five farmers’ replications.According to experimental treatmentvegetable such as potato (Solanum tuberosum) was used as the first crop and Boro rice (Oryza sativa L.) variety BRRI dhan28 as the second crop. Seeds (whole tubers) of potato cv. Challisha were collected from local market of Kaltapara, Gouripur, Mymensingh. For potato, land was prepared during the mid of October 2011 through ploughing followed byladdering. Fertilizers were applied at the rates of 250, 150, 250, 120, 10 and 10 kg ha-1urea, TSP, MoP, gypsum, zinc sulphate and boron, respectively. Total TSP, MoP, gypsum, zinc sulphate and boron and one half of the urea were applied during final land preparation and the rest one half of urea was top dressed at 35 days after seed planting. Seeds were sown on 24 October 2011 in lines at 30cm × 10cm spacing. Irrigation and weeding were done as and when necessary. To control late blight Ridomil gold was applied @ 1 kg ha^-1. Harvesting was done from 8 January 2012 to 12 January 2012.

BRRI dhan28 is a modern high yielding variety of Boro rice was developed by the Bangladesh Rice Research Institute. BRRI dhan28 matures within 140 days and attains a plant height of 90-95 cm and the average yield was found to be 6.0 t ha^-1 (BRRI, 2013). In terms of total growth duration this variety is the best short duration variety for boro season so far released by BRRI (BRRI, 2011).

Boro rice cv. BRRI dhan28 was cultivated after harvesting the potato in the same fields. Land was prepared during the third week of January 2012 through ploughing and laddering. Fertilizers were applied at the rates of 220, 80, 100, 100 kg ha-1 as urea, TSP, MoP and gypsum, respectively. Total amount of triple super phosphate, gypsum and three-fourth of MoP were applied during final land preparation and urea was top dressed in three equal splits at 10, 30 and 45 days after transplanting. The rest of MoP was applied with urea at top dressing. Forty-day old seedlings were uprooted carefully from the seed bed without causing any mechanical injury to the roots for transplantation. For easy uprooting seed beds were made wet by the application of water on the previous day of uprooting seedling. Only the selected healthy seedlings.Only the selected healthy seedlings were transplanted in the experimental plots on 12 January 2012 in 25 cm apart rows maintaining a distance of 15 cm from hill to hill @ 3 seedlings hill^-1. Seedlings in some hills died off and those were replaced on 12 February 2011 with the seedlings from the same source.Experimental field was irrigated to maintain a constant level of standing water up to 6 cm at early stage to enhance tillering and 10-12 cm at later stage to discourage late tillering.The experimental plots were irrigated as and when necessary. The irrigation was stopped before 20 days of harvest to enhance maturity. Rifit was applied @ 1L ha^-1 to control weed.Maturity of crop was determined when 90 per cent of the grains became golden yellow colour. Five hills were selected randomly from each unit plot and uprooted before harvesting for recording necessary data other than yields. After sampling the whole plot was harvested at maturity on 15 April 2012 by cutting the plants at the ground level with sickle. The harvested crop of each plot was separately bundled, properly tagged and then brought to the threshing floor. The harvested crops were threshed by pedal thresher and the fresh weights of grain and straw were recorded plot-wise. The grains were cleaned and sun dried to a moisture content of 14 per cent. Straws were similarly sun dried. Finally grain and straw yields plot-1 were recorded and converted to t ha^-1.

Source of Information: Res. Agric. Livest. Fish. ,Vol. 2, No. 2, August 2015: 247-251 (ISSN : P-2409-0603, E-2409-9325)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Based upon our research findings, we can conclude that trial conducted on Potato-Boro rice-Fallow cropping pattern, it is clearly proved that double cropping of potato cv. Challisha and Boro rice cv. BRRI dhan28 can successfully be practiced in haor ecosystem where only one crop of Boro rice is generally grown. This pattern may be disseminated in haor areas of similar environment. For large scale dissemination this component technology needs further up scaling.

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