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Effect of Inorganic Phosphorus Fertilizer and Inoculants on Yield and Phosphorus Use Efficiency of Wheat

M. B. Hossain
Soil Science Division, Bangladesh Institute of Nuclear Agriculture (BINA)Mymensingh 2200, Bangladesh

M. A. Sattar
Soil Science Division, Bangladesh Institute of Nuclear Agriculture (BINA)Mymensingh 2200, Bangladesh

Abstract/ Executive Summary:

To investigate the response of mineral phosphatic fertilizer and inoculum alone or integrated use of these sources on the growth, yield, nutrient uptake and phosphorus use efficiency of wheat. Treatment combinations were: T₀=Control, T₁= Pseudomonas sp, T₂= Klebsiella sp, T₃= Pseudomonas sp + 15 kg P ha^-1, T₄= Klebsiella sp + 15 kg P ha^-1 and T₅= 30 kg P ha^-1. Trials were laid out in a randomized block design with four replications having unit plot size of 5 m × 3 m and wheat was the test crop. Maximum grain and straw yield (2.13 and 2.84 t ha^-1) were recorded in T₃ (PSB 7 + 15 kg P ha^-1) and T₄ (PSB 19 + 15 kg P ha^-1) treatments at Pabna and Rajshahi, respectively. Pseudomonas sp for Pabna and Klebsiella sp for Rajshahi along with triple super phosphate showed better performance than other treatments in respect of wheat yield, nutrient uptake and quality of soil. Phosphate solubilizing bacteria alone also increased phosphorus use efficiency during crop production. A positive significant correlation was observed between yield contributing characters and grain yield of wheat. Based on these results it may be concluded that, phosphate solubilizing bacteria contributed from unavailable to available form of soil phosphorus and stimulated the available form of applied phosphatic fertilizer as a result increased nutrient uptake and yield of wheat.

Keywords: Wheat, Phosphate solubilizing bacteria, Phosphorus use efficiency, Yield

Location: Gangetic river flood plain at Pabna and Barind tract of Rajshahi in Bangladesh

Start Date: 00-11-2012

End Date: 00-04-2013

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

1. To evaluate the performance of phosphate solubilizing bacteria either alone or in combination with triple super phosphate on wheat.

Methodology:

Field experiments were carried out at two locations of Bangladesh is situated between latitudes 20~34' and 26~38' north and latitudes 88~01' and 92~41' east. Two locations were Gangetic river flood plain at Pabna and Barind tract of Rajshahi in Bangladesh. Soil samples were randomly collected at 0 – 15 cm depth during the time of land preparation from several spots of the experimental land and composited it. The soils were sandy loam and clayey in texture having pH 7.5 and 4.8 with 1.0 and 1.8 per cent organic matter, 0.11 and 0.13 per cent total nitrogen, 14.00 and 30.63 ppm P in Pabna and Rajshahi, respectively. The treatment combinations were : T₀=Control, T₁= Pseudomonas sp, T₂= Klebsiella sp, T₃= Pseudomonas sp + 15 kg P ha^-1, T₄= Klebsiella sp + 15 kg P ha^-1 and T₅= 30 kg P ha^-1. The trials were laid out in randomized block design using four replications having unit plot size of 5 m × 3 m and wheat was the test crop. One third of 90 kg N ha^-1 as urea, 42 kg K₂O ha^-1 as muriate of potash, 10 kg S ha^{- 1}as gypsum and phosphorus as triple super phosphate as per treatment were applied at the time of final land preparation then mixed well with soil by spading. PSB application with seed coating at 7.5 kg ha^-1 of peat based carrier having a bacterial load of 108 cells per gram. The rest 60 kg N as urea was applied in two splits at maximum vegetative phage and panicle initiation stage. Cultural practice was done whenever necessary. At harvesting stage, 10 plants were randomly selected and harvested from each unit plot to record yield contributing characters, grain and straw yield, nitrogen and phosphorus uptake in grain and straw. Dried seed and straw samples were digested in di-acid mixture of HNO₃ : HClO₄ (9 : 4) and phosphorus was determined by ascorbic acid reductant method. Soil samples were analyzed to determine the content of phosphorus both at initial and after harvest of wheat. Recovery efficiency (RE) is uptake of phosphorus (kg) by a wheat crop from 1 kg of applied phosphorus to the field.

Source of Information: J. Environ. Sci. & Natural Resources, 7(1): 75-79, 2014; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Pseudomonas sp for Pabna and Klebsiella sp for Rajshahi along with triple super phosphate showed better performance than other treatments in respect of wheat yield, nutrient uptake and quality of soil. Phosphate solubilizing bacteria alone also increased phosphorus use efficiency during crop production. A positive significant correlation was observed between yield contributing characters and grain yield of wheat. Based on these results it may be concluded that, phosphate solubilizing bacteria contributed from unavailable to available form of soil phosphorus and stimulated the available form of applied phosphatic fertilizer as a result increased nutrient uptake and yield of wheat.

Knowledge Management: Journal