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Integrated Nutrient Management for Potato-maize-t. Aman Rice Cropping Pattern

P K Saha
Ex-Chief Scientific Officer and Head, Soil Science Division, BRRI, Gazipur

F Rahman
Senior Scientific Officer
Soil Science Division, BRRI, Gazipur

M Akter
Senior Scientific Officer
Soil Science Division, BRRI, Gazipur

R Islam
Principal Scientific Officer
Soil Science Division, BRRI, Gazipur

A T M S Hossain
Senior Scientific Officer
Soil Science Division, BRRI, Gazipur

M G Ali
Principal Scientific Officer and Head
BRRI RS, Rangpur, Bangladesh

Abstract/ Executive Summary:

A field experiment on integrated nutrient management (INM) for Potato-Maize-T. Aman cropping pattern was conducted at BRRI RS farm, Rangpur (AEZ-3) during 2007-2010. The objectives were to examine the effect of Potato-Maize-T. Aman cropping on soil fertility and to develop appropriate fertilizer management practices for the above mentioned pattern. Inorganic and organic nutrient sources were tested in six different combinations in Rangpur region. Poultry manure (PM) @ 3.0 t ha^-1 + IPNS based inorganic fertilizers for potato (N₈₀, P₀, K₃₀, S₀, Zn₀, Mg₄, B₁) and maize (N₁₃₆, P₀, K₄₀, S₂, Zn₁.8, Mg₂, B₁) crops, and STB dose for T. Aman crop (N₆₅, P₃, K₂₇, S₈) has been recommended for Potato-Maize-T. Aman cropping pattern in Rangpur region. In fertilized plots, there was an apparent negative balance for N and K. The balances for P and S were positive. Organic C, total N and available P in soil increased due to integration of chemical fertilizer with PM. Results indicate that it is necessary to apply organic manure in combination with chemical fertilizer for sustaining soil fertility. For maize and potato crops, fertilizer dose needs to be updated after every three years of successive crop cultivation under Potato-Maize-T. Aman cropping pattern. Net additional income was the highest in T₅ where PM and IPNS based fertilizer applied.

Keywords: Poultry manure, Nutrient sources, Soil health, Nutrient balance

Location: BRRI RS farm, Rangpur (AEZ-3)

Start Date: 00-00-2007

End Date: 00-00-2010

Program Area: Farming System

Commodity: Potato

Objectives:

To study the Integrated Nutrient Management for Potato-Maize-T. Aman Rice Cropping Pattern

Methodology:

Field experiment was conducted at the BRRI RS farm, Rangpur (AEZ-3) during the period of Kharif^-1, 2007 to Rabi, 2009-10. The initial soil characteristics of the experimental field. The soil texture of BRRI RS farm, Rangpur is sandy loam having strongly acidic reaction. Six treatment combinations were tested: T₁=Native nutrient; T₂=AEZ basis (BARC fert. Recom. Guide, 2005); T₃=Soil testbased (STB) dose; T₄=20% more than STB dose; T₅=Poultry Manure (PM) @ 3 t ha^-1 (oven dried) + IPNS basis inorganic fertilizer for maize and potato crop/T₅=same as T₃ for T. Aman crop and T₆=Farmers’ practice (based on interview of 15/20 local farmers). Nutrient content of poultry litter is given as follows: moisture (33.6±4.77) %, OC (11.4±1.14) %, Total N (2.00±0.11) %, P (2.34±0.13) %, K (2.00±0.15) %, S (1.00±0.12) %, Zn (0.04±0.002) % and Mg (0.07±0.001) %. The experiment was laid out in a randomized complete block design with three replications. The sources of N, P, K, S, Zn, B and Mg were urea, TSP, MoP, gypsum, zinc sulfate, borax and magnesium sulfate, respectively. Except urea, all other inorganic fertilizers were applied at final land preparation for all crops in the cropping pattern. Well decomposed PM was applied at final land preparation for maize and potato. Urea was applied into three equal splits for maize and T. Aman crop: 1/3 N as basal, 1/3 N at 25-30 day after sowing (maize)/1/3 N at 15-20 DAT (T. Aman) and 1/3 N at 45-50 DAS (maize)/1/3 N at 27-30 DAT (T. Aman). For potato, urea was applied into two equal splits: ½ as basal and the rest ½ at 30-35 DAS. Necessary intercultural operations were done as and when ever required for each crop. Potato (cv. Diamont/Granula) was tested. It was seeded on last week of November. One seed/pit (depth of 5.0-7.5 cm) was sown with line to line 50 cm spacing and seed to seed 20 cm apart. Maize (BARI hybrid 3 (1st yr), BARI hybrid 2 (2nd yr) and BARI hybrid 5 (3rd yr), Kharif I) was grown at 2nd week of March of the conducted year. Two seeds/pit (at the depth of 2.5-5.0 cm) was sown with line to line 80 cm spacing and seed to seed 20 cm apart. BRRI dhan33 was tested. Thirty- to thirty-five- day-old seedlings were transplanted using 2/3 seedlings/hill at 20 cm × 20 cm spacing on the 2nd and 3rd week of July of the conducted year. At maturity, the maize and potato were harvested from the whole plot (Plot size: 4 m × 4 m) and T. Aman crop was harvested from 5 m²area at the centre of each plot. The grain yield of maize and T. Aman rice was adjusted to 14% moisture. The crop residue was recorded at oven dry basis. Economic analysis was done. Nutrient contents (N, P, K and S) from plant samples of the 1st and 2nd crop-cycle of the cropping pattern were determined by standard laboratory procedure (Yoshida et al., 1972). After the completion of three crop- cycles, some physico-chemical properties of post harvest soil were studied following the standard procedure (Blake and Hartge, 1986; Black, C A, 1965; Jackson, M L, 1962; Page et al., 1982). The recorded data were statistically analyzed using IRRISTAT version 4.1 (IRRI, 1998).

Source of Information: Bangladesh Rice J. 20 (1) : 51-58, 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

PM @ 3.0 t ha^-1 + IPNS based inorganic fertilizers for potato and maize crops, and STB dose for T. Aman crop may be a good fertilizer management package for Potato- Maize-T. Aman cropping pattern. To sustain soil fertility, it is necessary to apply organic manure in combination with chemical fertilizer. For maize and potato crops, fertilizer recommendation should be updated alternate in every three years.

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