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Soil Test Based Inorganic Fertilizer and Integrated Plant Nutrition System for Rice (oryza Sativa L.) Cultivation in Inceptisols of Bangladesh

M. I. Ullah Sarkar *
Soil Science Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh

M. M. Rahman
Department of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

G.K.M. M. Rahman
Department of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

U. A. Naher
Soil Science Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh

M. N. Ahmed
Soil Science Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the Bangladesh Rice Research Institute, Gazipur during 2013 to study the potential of different organic materials in integrated plant nutrition system (IPNS) and soil test based (STB) inorganic fertilizer on the growth, nutrient uptake and yield of rice (Oryza sativa L.): variety BRRI dhan29. Five treatments were laid out in a randomized complete block design with four replications. The treatments were: (1) soil test based inorganic fertilizer (NPKS @ 138-7-80-3 kg ha^-1), (2) cow dung (3 t ha^-1), (3) poultry manure (2 t ha^-1⁾, (4) mustard oil cake (2 t ha^-1) and (5) control. Organic fertilizers were applied on dry weight basis. Inorganic fertilizers were applied along with poultry manure (PM), cow dung (CD) and mustard oil cake (MOC) as IPNS. Soil test based STB fertilizer and PM in IPNS provided maximum grain yield of rice (6.11 t ha^-1).Maximum plant height and tiller numbers were found in MOCtreatment, while the numbers of filled grains were higher in STB fertilizer and PM treated plots. The application of different organic sources as IPNS significantly influenced the N, P, K and S uptake in rice. However, the highest N, P, K and S uptake were found in the PM treatment. The benefit cost ratio of different treatments followed the order of STB>PM>CD>Control>MOC. Considering yield potential and BCR, STB fertilizer and PM treatments were found economically profitable. However, from environmental point of view and sustainable management of soil health and crop productivity, application of PM and CD in rice-rice cropping system is recommended for rice cultivation.

Keywords: Integrated plant nutrition system, Rice, Benefit cost ratio, Nutrient uptake

Location: Bangladesh Rice Research Institute, Gazipur

Start Date: 00-00-2013

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

Considering the facts, the investigation was carried out to assess the comparative potential of different organic fertilizers such as cow dung, poultry manure and mustard oil cake as the component of IPNS, and soil test based inorganic fertilizer for enhancing yield and nutrient uptake of rice.

Methodology:

The field experiment was conducted at the Soil Science research field of Bangladesh Rice Research Institute, Gazipur during January to May 2013. The experimental site lies between 29.59^oN latitude and 90.24^oE longitude with an elevation of 8.4 m from sea level. The soil of the experimental site belongs to the order Inceptisols in USDA soil classification. The experiment was laid out in a randomized complete block design with four replications. The treatments were: 1) soil test based (STB) dose, 2) STB + Cow dung @ 3 t ha^-¹ as IPNS, 3) STB + Poultry manure (PM)@ 2 t ha^-¹ as IPNS, 4) STB + Mustard oil cake (MOC) @ 2 t ha^-¹ as IPNS and 5) control. Rice variety BRRI dhan29 was used as test crop. All of the organic sources were applied as dry weight basis. Before transplanting the rice seedlings, samples of initialsoil and the used organic manures were collected for analyzing their inorganic properties. The initial soil contains 2.10% total organic matter, 0.11% total N, 19 mg kg^-1 available P, 0.14 meq K in 100^-¹ gsoil and 28 mg kg^-1 available S. Application of organic fertilizers and transplanting of riceWell decomposed CD, PM and MOC were applied to the respective treatments one week before final land preparation. Based on the nutrient (NPKS) properties of initial soil and organic manures used, fertilizers rates were calculated using fertilizer recommendation guide of Bangladesh Agricultural Research Council (BARC, 2012). Phosphorous from triple super phosphate (TSP), potassium from muriate of potash and sulphur from gypsum were applied at the time of final land preparation. Nitrogen from urea was applied in three equal splits. One-third of urea was applied at the time of final land preparation. The remaining two-third was top dressed at maximum tillering stage and 5-7 days before panicle initiation stage of crop growth. Forty five-day old seedlings of BRRI dhan29 having 7.5 t ha^-1 yield potential were transplanted with spacing 20 cm × 20 cm on January 10, 2013 and harvested at maturity on May 20, 2013. Grain yield and nutrient content analyses Plant samples were collected at panicle initiation and maturity stage for nutrient analysis. Total nitrogen content was estimated by Micro Kjeldhal method (Bremner, 1965) and P, K and S contents were determined by nitric-perchloric acid digestion method (Yamakawa, 1992). The nutrient uptake was calculated as: Nutrient uptake (kg ha^-1) = Nutrient content (%) × Yield (t ha^-1) x 10 ......... (1) For estimation of grain yield, the crops were harvested at maturity. Grain yield was calculated from a harvesting area of 5 m2 and adjusted to 14% moisture content. Straw yield was calculated on oven dry basis from randomly collected 16 hills. Statistical analysis Data were statistically analyzed using CropStat7.2 and SPSS16.0 statistical software following the F-test and the mean comparisons were made by DMRT (Gomez and Gomez, 1984) at the 5% level of significance. Economic analysis was carried out to estimate net return and benefit cost ratio.

Source of Information: The Agriculturists 14(1): 33-42 (2016) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Solitary application of soil test based inorganic fertilizer and poultry manure contributed to the maximum numbers of filled grains and grain yields of rice (6.11 t ha^-1).The application of different organic sources as IPNS significantly influenced the N, P, K and S uptake in rice, while the highest nutrient uptakes were found in the PM treatment. Th e high est benefit cost ratio (BCR) was found in STB inorganic fertilizer (3.33) followed by PM (2.89), CD (2.56), control (1.49) and MOC (1.23).Even though STB fertilizers provided the maximum BCR, application of PM and CD is still recommend from the environmental point of view and sustainable management of soil health and crop productivity.

Knowledge Management: Journal