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Effects of Organic Manures and Bio-slurries with Chemical Fertilizers on Growth and Yield of Rice (cv. BRRI Dhan28)

M.S. Rhaman
Department of Seed Science and Technology, Bangladesh Agricultural University, Mymensingh

M.G. Kibria
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

M. Hossain
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

M.A. Hoque
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The soil fertility of Bangladesh is decreasing every year at an alarming speed. Low organic matter content is one of the most important contributing factors for poor fertility status of soils. Organic manure and bio-slurry along with chemical fertilizer can successfully be used to improve the soil health and productivity. To evaluate the effect of organic manures and bio-slurries along with chemical fertilizers on growth and yield of rice production, an experiment was conducted at the farmers’ field of Fulbaria Upazilla, Mymensingh during the period of February to May 2015. The experiment was laid out following randomized complete block design (RCBD) where each treatment was replicated three times. There were eight treatment combinations viz. T0: Control (no fertilizer or manure), T₁: Farmers’ practice, T₂: 100% recommend fertilizer dose (RFD) of chemical fertilizers (NPKSZn), T₃: 75% RFD (NPKSZn) + CD (5 t ha^-1), T₄: 75% RFD (NPKSZn) + CD slurry (5 t ha^-1), T₅: 75% RFD (NPKSZn) + PM (3 t ha^-1), T₆: 75% RFD (NPKSZn) + PM slurry (3 t ha^-1), T₇: 75% RFD (NPKSZn) + Compost (10 t ha^-1). The rice crop cv. BRRI dhan28 was used as a test crop. Growth and yield of BRRI dhan28 were very low in the control treatment where no manures or fertilizers were applied in the experimental plots. Application of organic manures or bio-slurries with chemical fertilizers significantly influenced growth and yield components of rice viz. plant height, effective tillers, panicle length and grains per panicle. Grain and straw yields of rice significantly increased due to application of manures or bio-slurries with chemical fertilizers. Nutrient (NPKS) uptake by crop was also significantly influenced by application of manures or bio-slurries with chemical fertilizers. Therefore, results suggest that combined application of manure or bio-slurry with chemical fertilizers might improve soil fertility, thereby increasing yield of rice.

Keywords: Crop productivity, Nutrients management, Organic amendment, Bio-slurry

Location: Fulbaria Upazilla, Mymensingh

Start Date: 00-02-2015

End Date: 00-05-2015

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer and manures, Rice, Bio fertilizer

Objectives:

To investigate the effect of integrated nutrient management with organic manures and bio-slurries in intensive cropping systems for sustaining soil fertility and increasing rice productivity.

Methodology:

The experiment was conducted at the farmers’ field of Fulbaria Upazilla (AEZ-9; latitude 24°44′ N and longitude 90°28′E), Mymensingh from February to May, 2015. Soil samples were collected from the experimental field from 0-15 cm depth for determining the characteristics of the soil. Collected soil samples were mixed to make a composite soil sample. Then soil samples were air- dried, crushed and passed through a 2-mm sieve. For the analysis of physical and chemical properties of soils, soil samples were kept in plastic containers. The soil was clay loam having pH 5.34, total N 0.07%, available P 5.0 ppm, available S 7.2 ppm, exchangeable K 7.4 me/100g soil and organic matter 1.2%. Manures viz. cowdung, cowdung slurry, poultry manure, poultry manure slurry and compost were used in this study. Cowdung, poultry manure and compost were collected from farmers’ farm. Cowdung slurry and poultry manure slurry were collected from biogas plants of Bhaluka, Mymensingh. The experiment was laid out following RCBD where each treatment was replicated three times. Boro rice cv. BRRI dhan28 was used as a test crop. Thirty-days-old seedlings of rice were transplanted in the experimental field. There were eight (8) treatment combinations with cowdung (CD), poultry manure (PM), CD slurry, PM slurry, compost and Recommended Fertilizer Dose (RFD) of chemical fertilizers for high yield goal (HYG) as follows- T₀: Control (no fertilizer or manure), T₁: Farmers’ practice, T₂: 100% RFD chemical fertilizers (NPKSZn), T₃: 75% RFD (NPKSZn) + CD (5 t ha^-1), T₄: 75% RFD (NPKSZn) + CD slurry (5 t ha^-1), T₅: 75% RFD (NPKSZn) + PM (3 t ha^-1), T₆: 75% RFD (NPKSZn) + PM slurry (3 t ha^-1), T₇: 75% RFD (NPKSZn) + Compost (10 t ha^-1). Manures and bio-slurries were added to the soils during final land preparation. All manures were applied at 15% moisture basis. The rates of chemical nutrients were calculated on the basis of HYG (BARC 2012). Experimental plots received fertilizers as per treatments. During final land preparation triple super phosphate, muriate of potash, gypsum, zinc sulphate and boric acid were applied. Urea was applied in three equal splits. Weeding and other management practices were performed as and when required. Irrigation was also done whenever required. The crops were harvested at full maturity. Grain and straw yields and plant parameters were recorded. Chemical analysis of plant and soil samples was performed in the Department of Soil Science, BAU. The N, P, K and S contents were measured from plant samples following standard methods as described by Khanam et al. (2001). Data were analyzed statistically using analysis of variance (ANOVA) to examine the treatment effects. The mean differences were adjudged by Duncan’s Multiple Range Test (DMRT) (Gomez and Gomez, 1984) and ranking was indicated by letters.

Source of Information: Int. J. Expt. Agric. 6(2):36-42 (September 2016)

Article Link (Online Journal): http://ggfjournals.com/e-journals archive

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Combined application of manure or bio-slurry with fertilizers significantly increased growth, yield components and grain and straw yields of rice. We measured NPKS contents in rice whether nutrient uptake influenced by different treatments. Nutrient uptake by rice crop was also significantly affected due to application of manure or bio-slurry with fertilizers. It can be concluded that application of chemical fertilizers alone or in combination with manure or bio-slurry increased growth and yield of rice whereas combined application of manure or bio- slurry with fertilizer not only increased crop production but also maintained soil fertility status in intensive cropping system.

Knowledge Management: Journal