IMPROVEMENT OF RICE BASED CROPPING SYSTEM THROUGH NON RICE CROP IN BEEL AREA OF BANGLADESH

M.A.K. Mian¹ and A. A. Begum²

¹Chief Scientific Officer (Research Wing), ²Principal Scientific Officer (Agronomy Division), BARI, Gazipur

Corresponding author: khayer66@gmail.com

 

 Two experiments were conducted at Chalan beel (Experiment-1: Sirajgonj) and at Monglar beel (Experiment-2: Faridpur) to improve the rice based cropping system in lowland during 2020-2021 and 2021-2022. Treatments of Experiment-1 were four cropping patterns like T₁=Mustard-Boro rice, T₂= Mustard-Jute, T₃=Potato-Boro rice and T₄=Fallow-Boro rice. Treatments of Experiment-2 were four cropping patterns viz. T₁=Onion-Jute, T₂=Onion-Broadcast aman (B. aman) rice, T₃= Lathyrus- B. aman rice and T₄=Fallow-Boro rice. Experiments were conducted in a RCB design with five dispersed replications. Crops in the patterns were sown/planted/transplanted timely in the growing season. Cultural management were done as and when necessary as per recommendation of each crop. All relevant data was collected and analyzed systematically. The results of the Experiment-1 revealed that Mustard-Jute and Potato-Boro rice cropping patterns were found superior in respect of productivity and economic returns as compared to existing cropping pattern (ie. Fallow-Boro rice cropping pattern). The findings of the experiment-2 indicted that Onion-Jute and Onion-B. aman rice were found as the most productive cropping patterns with better economic benefit over existing cropping pattern (ie. Fallow-Boro rice cropping pattern). Farmers’ are interested to adopt in these improved cropping patterns in the beel area. They will get more economic returns. Total food production of the country will be enhanced through adoption of these improved cropping patterns.    

Acknowledgement: Acknowledged to Minstrelsy of Science and Technology (MOST) for Research Grant. (BS-244) for the year of 2021-2022.

     

 

Onion

 

Jute 

Photograph: Onion-Jute Cropping Pattern at Faridpur Beel Area

 

 

 

CARBON SEQUESTRATION AND ASSESSMENT OF CARBON INPUT THROUGH POTATO-MAIZE-T.AMAN CROPPING PATTERN IN BANGLADESH

CARBON SEQUESTRATION AND ASSESSMENT OF CARBON INPUT THROUGH POTATO-MAIZE-T.AMAN CROPPING PATTERN IN BANGLADESH

M.A.K Mian, A.A. Begum and R.R. Saha

Agronomy Division

Bangladesh Agricultural Research Institute, Gazipur 1701

Abstract

The experiment was conducted at Agronomy Research field in 2017-2019. Treatment were viz. T₁=Full residue of potato, maize and 1/3 of rice + 100% recommended fertilizer dose (RFD) of T.aman, T₂=Full residue of potato, maize and 1/3 of rice + 80% RFD of T.aman, T₃=Full residue of potato, maize and 1/3 of rice + 60% RFD of T.aman, T₄=Residue removed + 100% RFD of T.aman, T₅=Control (Without crop residue and fertilizer). Potato tuber yield was higher in all treatments (18.06-19.88 t/ha) except T₅ (8.85 t/ha). Grain yield of maize was the highest in T₁-T₄ treatments (4.25-4.53 t/ha). The highest grain yield of rice was obtained from control treatment (T₅) (3.76 t/ha) but the lowest in T₄ (2.25 t/ha). Total organic C input from Potato-Maize–T. aman rice cropping pattern was noticed higher value in T₁ (10.66 t/ha) but the lowest in T₅ (6.57 t/ha). The highest total organic C adding from the pattern was estimated from T₁ (4.70 t/ha) but the lowest in control T₅ (0.58 t/ha). Treatments, T₁, T₂ and T₃ showed positive balance of organic C in soil while T₁ showed the highest value (0.11%). The C sequestration was estimated the highest in T₁ (3.83 t/ha) while T₄ and T₅ showed negative values. The results expressed that addition of crop residues as well as organic C in soil enhanced C balance or C sequestration in soil. Treatments, T₁, T₂ and T₃ showed positive balance of total N in soil while T₁ showed the highest value (0.028%). Negative balance of total N in soil was noticed in T₄ and T₅. Addition of crop residues enhanced slightly positive balance of total N in soil. Total carbon input (average of four year from 2014-2015 to 2017-2018) was estimated at 17.1659 million ton/year through potato- maize-T.aman rice cropping pattern in Bangladesh.