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Nutrient Management for Sustaining Soil Fertility and Yield of Mustard-mungbean-t.aman Cropping Pattern (2000-2019)

N. Mahmud
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

N. Salahin
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

R. Sen
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

S. Akhter
Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

A long term field trial on Mustard-Mungbean-T.aman cropping pattern has been conducted from 2000-2019 in High Ganges Floodplain Soils (AEZ-11) of Jashore. The objectives were to find out sustainable fertilizer doses for the pattern, monitor soil health, estimate uptake of different nutrients and make a balance sheet for each of the nutrient. There were three levels each of N (80, 120 and 160 kg ha^-1), P (18, 36 and 54 kg ha^-1) and K (35, 70 and 105 kg ha^-1) in the treatment combinations. The design was RCB replicated thrice. The combined effect of 120-54-70-40-3-1 kg ha^-1 of NPKSZnB (T₅) produced the highest seed yield (1.52 t ha^-1) of mustard. The residual effect of 120-54-70-40-3-1 kg ha^-1 of NPKSZnB (T₅) gave the highest yield of both grain and straw yield of mungbean and T.aman rice. Highest total rice (system) yield of 14.35 t ha^-1yr^-1 was obtained from T₅ treatment. Lowest total rice (system) yield of 8.30 t ha^-1yr^-1 was obtained from control i.e. native fertility treatment (T₈). Highest gross margin of 126389 Tk^-1ha^-1yr^-1 and BCR of 1.79 obtained from T₅ treatment. It was observed that a total amount of 1345.9, 285.3, 1242, 210.7 and 10.6 kg ha^-1 of NPKS and Zn were removed from the soil by fourteen cropping cycles while 1300, 540, 700, 250, and 15 kg ha^-1 of NPKS and Zn were added in the soil as nutrients. N and K removal were found to be higher than the amount added. About 129, 71 and 7kg ha^-1 of P, S and Zn were added in soil system when about 90 t ha^-1 of green biomass of mungbean from jfourteen cropping cycles were ploughed down after grain harvest.

Keywords: Fertilizer, Nutrient, Nutrient management, Biomass, AEZ, Cropping pattern, Mustard, Mungbean, T.Aman

Location: High Ganges Floodplain Soils (AEZ-11) of Jashore, Bangladesh

Start Date: 00-00-2000

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Soil fertility, Nutrient solution, Cropping pattern

Objectives:

To determine optimum fertilizer doses and nutrient balance using nutrient management approach.

Methodology:

This field trial was conducted in High Ganges Floodplain Soils (AEZ-11) of Jashore during the period of 2000-2019 to estimate the contribution and efficiency of individual nutrients and to find out Mustard-Mungbean-T.Aman cropping pattern based fertilizer recommendation. A description of nutrient status of initial soil prior to fertilization is presented.

The experiment was laid out in RCB design with eight treatments replicated three times. The unit plot size was 5m ´ 4m. There were three levels each of N (80, 120 and 160 kg ha^-1), P (18, 36 and 54 kg ha^-1) and K (35, 70 and 105 kg ha^-1) in the treatment combinations. BARI Sharisha-14 was used for the study and 40 kg S, 3 kg Zn and 1 kg B ha^-1 were applied as a blanket dose in all the treatment except the absolute control treatment. All PKSZnB and half of N were applied at the time of final land preparation and the remaining N was applied before flowering stage. The seeds were sown in the 3^rd week of November. Only nitrogen was applied at the rate of 20 kg N ha^-1 in all the plots except the control treatment for the second crop mungbean (Var. BARI Mung-6). The seeds were sown in the 1^st week of March and picking was started in the 2^nd week of May and continued up to the 1^st week of June. After the harvest, the total biomass was ploughed down in the soil.

The fertilizer was applied in T.Aman (BINA Dhan-7) according to the schedule.The seedlings were transplanted on 1^st week of August and harvested in the last week of October. 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 least significant difference (LSD) at the 5% level of significance (p<0.05).

Source of Information: Annual Research Report 2019-2020, Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The T₅ treatment (N₁₂₀P₅₄K₇₀S₄₀Zn₃B₁ kg ha^-1 for the mustard, 20 kg N for mungbean and N₁₂₀P₅₄K₇₀S₁₀kg ha^-1 for T.Aman cropping pattern) is suitable in respect of sustainable yield and BCR.The highest system productivity was attributed from T₅ treatment and the lowest from T₁control treatment. The average soil fertility status was mostly unchanged, somewhere it was changed positively. As potassium showed negative balance, more potassium is to be added to improve soil fertility status. So, through this practice the soil nutritional status may be sustained in the study area of AEZ-11.

Knowledge Management: Report/Proceedings