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Farmers’ Participatory Site Specific Nutrient Management in Gangetic Tidal Floodplain Soil for High Yielding Boro Rice (oryza Sativa L.)

D. K. Nath
CSISA-IRRI Project, International Rice Research Institute (IRRI), Barisal-8200, Bangladesh

F. Haque
CSISA-IRRI Project, International Rice Research Institute (IRRI), Barisal-8200, Bangladesh

F. Amin
CSISA-IRRI Project, International Rice Research Institute (IRRI), Barisal-8200, Bangladesh

M. Sh. Islam
CSISA-IRRI Project, International Rice Research Institute (IRRI), Barisal-8200, Bangladesh

M. A. Saleque
CSISA-IRRI Project, International Rice Research Institute (IRRI), Dhaka-1213, Bangladesh

Abstract/ Executive Summary:

Site Specific Nutrient Management (SSNM) trials were conducted for irrigated, transplanted and high yielding rice (Oryza sativa L.) during Boro season 2012. Four treatments (NPK, PK, NK, and NP) were applied in a randomized complete block design to assess the effects of indigenous nutrient elements on rice yield and yield components. The trials were conducted so as to develop a site specific nutrient management approach for the farmers of Gangtic Tidal Floodplain ecosystem. The highest grain-yield of 5.64 t ha^-1 was observed in NPK treatment, which gave 9.0, 34.4 and 50.7% higher yields than those of NP, NK and PK, respectively. The response to indigenous K was remarkable and it gave the second highest yield (5.13 t ha^-1). The yield response to indigenous N was very poor and the lowest yield was found in N omission treatment (2.78 t ha^-1). The response to indigenous P was also poor (3.7 t ha^-1). This result shows that nitrogen and phosphorus are the most vibrant factors to increase yield since omission of N and P had significant impact on yield during Boro season. Use of N, P and K at 128.7, 8.08 and 12.78 kg, respectively could be recommended for growing BRRI dhan47 in Boro season. It could save P and K nutrient by 55.11 and 75.89 % compared to that of NPK treatment, respectively.

Keywords: Grain-yield, Nutrient omission, Rice, Site specific nutrient dose

Location: CSISA-IRRI Project, International Rice Research Institute (IRRI), Barisal-8200, Bangladesh

Start Date: 00-00-2012

End Date: 00-00-2012

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

To assess the effects of indigenous nutrient elements (especially N, P, K) on rice yield and yield components during Boro season at Nilganj union of Patuakhali district in order to develop a site specific nutrient management approach for farmers for increased fertilizer use efficiency.

Methodology:

On-farm participatory Site Specific Nutrient Management (SSNM) experiment was conducted with 5 farmers of Nilganj union (27° 56´ N latitude and 090° 11´ E longitude) in Kalapara Upazila of Patuakhali district during the Boro season 2012. The site belongs to the Gangetic Tidal Floodplain soil of Agro-ecological Zone (AEZ) 13. This is the south-central coastal part of Bangladesh. The most common cropping system is rice-fallow-fallow due to soil and water salinity. The farms were typically clustered into 3 villages and selected from farmers of similar socio-economic conditions. Soil types and farm management practices were also common. Four fertilizer treatments: balanced fertilizer (NPK), nitrogen omission (PK), phosphorus omission (NK), and potassium omission (NP) were applied in the trial. Blanket doses of other nutrients were applied to all treatments to prevent deficiencies other than nitrogen (N), phosphorus (P), or potassium (K). This included Zinc (Zn) and sulfur (S). In the trial N, P, K, S and Zn were used at 125.3, 18, 53, 13.67 and 2.73 kg per hectare in the form of Urea, Triple Super Phosphate (TSP), Muriate of Potash (MoP), Gypsum and Zinc Sulfate ( 272, 90, 106, 76 and 7.6 kg per hectare, respectively). TSP, MoP, Gypsum, and Zinc Sulfate were given as basal does and Urea was topdressed three times. Salt tolerant rice-variety BRRI dhan47 was chosen by all the farmers. For irrigation, surface water was used from Pakhimara canal where there was a sluice gate to protect saline water entrance from the river. Though the water salinity of adjacent river went up to 32 dS m^-1, canal water salinity ranged between 2.35 to 4.6 dS m^-1.

Source of Information: The Agriculturists 11(1): 8-14 (2013) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print), A Scientific Journal of Krishi Foundation

Article Link (Online Journal): http://www.banglajol.info/index.php/AGRIC/article/view/15236/10800

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Depending on the response of soil indigenous nutrient elements (N, P and K) it may be concluded that nitrogen and phosphorus are the most limiting factors to increase grain-yield in Nilganj union of Kalapara upazila, Patuakhali while K omission have no significant impact on grain yield. To produce rice (yield target 6±0.6 t ha^-1) in Boro season farmers may apply N, P and K at 128.7, 8.08 and 12.78 kg, respectively. It can save P and K nutrient by 55.11 and 75.89%, respectively compared to recommended doze. Further study is needed to compare between Farmers’ practice and SSNM recommended doses in the same farmers’ field in order to evaluate the approach and to evaluate the yield as well as gross return over fertilizer (GRF). A simplified SSNM approach is necessary with similar socio-economic and biophysical conditions.

Knowledge Management: Journal