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Determination of Nutrient Accumulation Pattern of New Aromatic Rice (oryza Sativa L.) as Influenced by Different Applied Fertilizers and Plant Spacing

AKM Alauddin Chowdhury
Department of Agricultural Extension, Khamar Bari, Farmgate, Dhaka, Bangladesh

Md Nurul Huda Al Mamun
Soil Resource Development Institute, Krishi khamar Sarak, Farmgate, Dhaka, Bangladesh

Md Khairul Islam
Soil Resource Development Institute, Krishi khamar Sarak, Farmgate, Dhaka, Bangladesh

Md Mohashin Farazi
Soil Resource Development Institute, Krishi khamar Sarak, Farmgate, Dhaka, Bangladesh

Abstract/ Executive Summary:

Field and laboratory experiments were conducted at the Bangabandhu Sheikh MujiburRahman Agricultural University, Gazipur, during boro season of 2015-2016 to determine the response of rice crop (BU Dhan 2) to different plant densities under different fertilizer levels. The variety was grown with three fertilizer levels viz. recommended (57-10-8-7-0.9 kg NPKSZn ha^-1), 50% higher (114-20- 16-14-1.8 kg NPKSZn ha^-1) and 50% lower (28.5-5-4-3.5-0.45 kg NPKSZn ha^-1) than recommended level and three plant spacing (20 cm x 25 cm, 20 cm x 20 cm and 20 cm x 15 cm) representing wider, standard and closer plant densities. Nutrient uptake of the variety was higher at higher level of fertilizer and closer plant spacing. The highest grain yield 5.18 t ha^-1 of the variety was associated with the highest nutrient uptake under higher dose of fertilizer at closer plant spacing. This treatment combination also showed the highest nitrogen (86.53 kg ha^-1), phosphorus (9.85 kg ha^-1), potassium (103.9 kg ha^-1), sulphur (12.27 kg ha^-1) and zinc uptake (265.76 g ha^-1) of the variety, although nutrient use efficiency was higher at lower fertilizer level under wider plant density.

Keywords: New aromatic rice, Plant spacing, Fertilizer

Location: Bangabandhu Sheikh MujiburRahman Agricultural University, Gazipur

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

To determine the response of rice crop (BUdhan 2) to different plant densities under different fertilizer levels.

Methodology:

Field and laboratory experiments were conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, during boro season of 2015-2016. The planting material was an aromatic rice variety (BUdhan2). The experiment having two factors (fertilizer level and plant spacing) was set up in a randomized complete block design with four replications. Fertilizer levels are 50% higher 114-20-16-14- 1.8 kg NPKSZn ha^-1 ) than recommended dose (F₁), recommended (57-10-8-7-0.9 kg NPKSZn ha^-1 ) dose (F₂) and 50% lower (28.5-5-4-3.5-0.45 kg NPKSZn ha^-1 ) than recommended dose (F₃) and three plant spacing such as wider, 20 cm x 25 cm (S₁), standard, 20 cm x 20 cm (S₂) and closer 20 cm x 15 cm, (S₃) plant densities. Compared treatments are F₁ S₁: Higher dose of fertilizer application with wider spacing. F₁ S₂: Higher dose of fertilizer application with standard spacing, F₁ S₃: Higher dose of fertilizer application with closer spacing, F₂S₁: Recommended dose of fertilizer application with wider spacing, F₂ S₂: Recommended dose of fertilizer application with standard spacing, F₂ S₃: Recommended dose of fertilizer application with closer spacing, F₃ S₁: Lower dose of fertilizer application with wider spacing, F₃ S₂: Lower dose of fertilizer application with standard spacing, F₃ S₃: Lower dose of fertilizer application with closer spacing. Rice plant of five hills from each plot were sampled at 10 days interval from 30 DAT and continued till 90 DAT. Nitrogen, P, K, S and Zn were determined from the collected plant samples. The leaf sample was dried at 70°C for 72 hrs and ground by Wiley Mill. The ground sample was digested in concentrated H₂PO₄ and total N concentration was determined by micro Kjeldahl method (Yoshida et al., 1976). The concentration of P, K, S and Zn was analyzed digesting a 0.2 g leaf sample with 6 ml of 5:2 HNO₃: HClO₄ (Yoshida et al., 1976). Grain and straw samples from each plot (200 mg) were taken and separately oven dried at 65°C over night to grind in a grinding machine. Total N content was determined by Micro-kjeldahl distillation. The data of different parameters were analyzed statistically by a statistical procedure of analysis of variance (ANOVA). Microsoft Excel and software program were used whenever appropriate to perform statistical analysis. Duncan’s Multiple Range (DMRT) Test was used to compare means at 0.05 level of significance.

Source of Information: The Agriculturists 2020; 18 (1) 31-41

Article Link (Online Journal): DOI: https://doi.org/10.3329/agric.v18i1.49457

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest uptake of nitrogen (86.53 kg ha^-1 ), phosphorus (9.85 kg ha^-1 ), potassium (103.9 kg ha^-1 ), sulphur (12.27 kg ha^-1 ) and zinc (265.76 g ha^-1 ) was found under higher dose of applied fertilizer with closer spacing was the maximum. On the other hand, the minimum uptake of nitrogen (50.54 kg ha^-1 ), phosphorus (6.0 kg ha^-1 ), potassium (61.1 kg ha^-1 ), sulphur (6.54 kg ha^-1 ) and zinc (144.16 g ha^-1 ) was observed under lower dose of applied fertilizer with wider spacing. Comparing the nutrient use efficiency among all nine treatments, lower dose of applied fertilizer with closer plant spacing showed the highest nutrient use efficiency of nitrogen (65.49 kg grain per kg N uptake), phosphorus (551.82 kg grain per kg P uptake), potassium (54.18 kg grain per kg K uptake), sulphur (505.86 kg grain per kg S uptake) and zinc (22. 96 kg grain per g Zn uptake).

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