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Nutrient Management for Sustaining Soil Fertility and Yield of Wheat-mungbean-t.aman Cropping Pattern (2018–2019)

M. J. Alam
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

S. Paul
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

M. B. Anwar
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

S. Akhter
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

A long term field experiment on Wheat-Mungbean-T.aman cropping pattern has been carried out in High Ganges Floodplain Soils (AEZ-11) of RARS, Jashore from 2000-2018. The objectives were to find out sustainable fertilizer recommendations, monitor soil health, estimate uptake of different nutrients for the cropping pattern & to make a balance sheet for each of the nutrients. There were six treatments viz. 125% recommended dose (RD), 100% RD, 75% RD, 50% RD, Farmers' practice and native nutrient. The design was RCB with three replications. Results showed consistently the highest yield from each of the crops of the pattern obtained with 125% RD treatment and which were statistically similar to 100% RD treatment. The highest total rice (system) yield of 12.92 t ha^-1yr^-1 was obtained from T₁ treatment (125% RD). The lowest total rice (system) yield of 6.89 t ha^-1yr^-1 was obtained from control i.e. native fertility treatment (T₆). The highest gross margin of 117557 Tk^-1ha^-1yr^-1 was also obtained from T₁ treatment (125% RD). The highest benefit-cost ratio of 1.83 was found in T₁(125% RD) treatment.

Keywords: Soil fertility, Yield, Soil health, Fertilizers, Nutrient management

Location: Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Farming System

Commodity: Fertilizer and manures, Wheat, Rice

Objectives:

The main objectives of this experiment are i) to find out sustainable fertilizers recommendations for wheat-mungbean-T.aman cropping pattern, ii) to monitor soil health after each cropping pattern and iii) to estimate uptake of different nutrients and to make a balance sheet for each nutrient.

Methodology:

This field trial has been conducted in High Ganges Floodplain Soils (AEZ-11) of RARS, Jashore from the period of 2000-2018. The experiment was laid out in an RCB design with six treatments replicated three times. The unit plot size was 5m ´ 6m. The treatment combinations were T₁=125% of the recommended dose (RD) (RD =120-35-75-20-5 kg of N P K S Zn ha^-1), T₂=100% of RD, T₃=75% of RD, T₄=50% of RD, T₅=Farmers' practice and T₆=Native nutrient. The Farmers' practice treatment was 60-40-30 kg ha^-1 of NPK respectively. The tested wheat variety was BARI Gom-30. All PKS Zn and ²/₃^rd of N were applied at the time of final land preparation and the remaining ¹/₃^rd of N was applied after first irrigation (17-21 DAS). The seeds were sown in the 4^th week of November and were harvested in the 2^nd week of March. Only nitrogen was applied @ 20 kg N ha^-1 in all the plots except the native nutrient treatment for the second crop mungbean (Var. BARI Mung-6). The seeds were sown in the 2^nd week of March and the first picking was on the 2^nd week of May and continued up to the 1^st week of June. Then the total biomass was incorporated in the soil. The same sequence was maintained in T.aman (BINA Dhan-7) for fertilizer treatments. The seedling was transplanted in the 1^st week of August and harvested in the 1^st week of November. Records on some yield parameters were taken at certain growth stages of all the crops of the pattern. Data were analyzed by ANOVA (using Crop Stat 7.2) to evaluate differences between treatments, and the means were separated using the least significant difference (LSD) at the 5% level of significance (p<0.05).

Source of Information: Annual Research Report 2018–2019, Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

125% and 100% recommended dose of chemical fertilizer produced identical yield and BCR of Wheat-Mungbean-T. Aman cropping pattern. This fertilizer combination sustained the Total Rice (system) productivity over the years. The average soil fertility status was mostly unchanged, somewhere it was increased. Potassium and sulphur showed a negative balance, more potassium and sulphur are to be added (to improve soil status). So, through this practice, the soil nutritional status may be sustained.

Knowledge Management: Report/Proceedings