Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effects of Reduced Rates of Fertilizers on N, P, K, S, and Zn Contents and Uptakes in BRRI Dhan29

Md. Zakaria Ibne Baki
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Abul Hashem
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md. Rafiqul Islam
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was carried out at the Soil Science field laboratory of Bangladesh Agricultural University, Mymensingh during Boro season of 2014 to study the effects of reduced rates of fertilizers on N, P, K, S, and Zn contents and uptakes in BRRI dhan29 rice. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments were categorized as T₁: control, T₂: Recommended Fertilizer Dose (RFD), T₃: 60% of RFD, T₄: 70% of RFD, T₅: 80% of RFD, T₆: 90% of RFD, T₇: 110% of RFD. The recommended fertilizer doses applied for the experiment were 100 kg N ha^-1, 15 kg P ha^-1, 50 kg K ha^-1, 15 kg S ha^-1 and 1.5 kg Zn ha^-1. Nitrogen, phosphorus, potassium, Sulphur, and zinc were supplied from urea, TSP, MoP, gypsum, and zinc Sulphate respectively. The full doses of TSP, MoP, gypsum, and zinc Sulphate were applied as basal dose during final land preparation while urea was applied in three equal splits. The grain and straw yields of BRRI dhan29 were significantly affected due to different treatments. The highest grain yield of 5.12 t ha^-1 was observed in T₅ which was statistically identical to those recorded in the treatments T₂, T_6, and T₇. The maximum traits of nutrient content by grain and straw and uptake by grain, straw, and the total had also higher in T₅. Effective tillers hill^-1, filled grains panicle^-1, unfilled grains panicle^-1, and 1000-grains weight were also higher in T₅. However, plant height and panicle length were higher in T₅ which is considered better than RFD and other treatments. The result obtained clearly indicated that to increase the crop yield 80% of RFD may be practiced instead of 100% RFD for higher grain yield from BRRI dhan29.

Keywords: BRRI dhan29, Fertilizers, N, P, K, S, and Zn contents, Uptakes

Location: Soil Science field laboratory of Bangladesh Agricultural University, Mymensingh.

Start Date: 00-00-2014

End Date: 00-00-2014

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

1. To evaluate the effects of reduced rates of N, P, K, S, and Zn on the yield and yield contributing characters of BRRI dhan29; and

2. To find out the effects of reduced rates of N, P, K, S, and Zn on the nutrient content and uptake by BRRI dhan29.

Methodology:

The experiment was carried out at the Soil Science field laboratory of Bangladesh Agricultural University, Mymensingh during Boro season of 2014. The experimental area belongs to a sub-tropical climate and is characterized by high temperature and moderately high rainfall during Kharif season (April to September) and low temperature in Rabi season (October to March). There were seven treatments as T₁: control, T₂: Recommended Fertilizer Dose (RFD), T₃: 60% of RFD, T₄: 70% of RFD, T₅: 80% of RFD, T₆: 90% of RFD, T₇: 110% of RFD. Recommended Fertilizer Dose (RFD) = 100 kg N ha^-1, 15 kg P ha^- ¹, 50 kg K ha^-1, 15 kg S ha^-1 and 1.5 kg Zn ha^-1. The sources of N, P, K, S, and Zn nutrients were urea, TSP, MoP, gypsum, and zinc Sulphate, respectively. The recommended high yielding variety BRRI dhan29 was used as a test crop. This variety was released by the Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur in 2008 after regional and zonal trials and evaluation. During boro season insect and disease invasion are very low and it is resistant to blast disease. The life cycle of this variety ranges from 145 to 155 days (BRRI, 2008). The seedlings were collected from Soil Science Field Farm, Bangladesh Agricultural University, Mymensingh. The experiment was laid out in a randomized complete block design (RCBD) with three replications of each treatment. Each replication is represented by a block. Each block was divided into seven unit plots for the selected treatment. There were 21 (7 x 3) unit plots and each unit plot size was 2.5 m x 4 m. The spacing between blocks was 1m and between plots was 0.5 m. The treatments were randomly distributed to unit plots in each block. Land preparation was started on 10 January 2014. The land was prepared by ploughing and cross ploughing with a power tiller. For raising the seedling, a previously prepared puddle land was selected for the seedling nursery. The sprouted seeds were broadcast on the prepared seedling nursery. Seeds were sown as uniformly as possible. Forty-day old seedlings were transplanted in the experimental plots on 23 January 2014. A distance of 20 cm from row to row and 20 cm from plant to plant was maintained. Three seedlings were used in each hill. The full dose of triple Superphosphate (TSP), murine of potash (MoP), gypsum and zinc sulphate were applied at the time of final land preparation. The first split of urea was applied after 20 days of transplanting and the second split of urea was applied after 40 days of transplanting at the maximum tillering stage and the third instalment was after 60 days of transplanting i.e. at the panicle initiation stage. Intercultural operations were done for ensuring and maintaining the normal growth of the crop like irrigation, weeding, insect and pest controls. The crop was harvested at maturity on 03 May 2014. After harvest, rice plants of three replicated treatments were bundled separately and carried to the laboratory, and separated the grains from panicles. The separated grains and straw were dried in the sun for 4 days. The sun-dried weight of grain and straw plot^-1 were taken (moisture up to 14%) and kept in brown paper bags for analysis of each treatment. From the 10 randomly selected hills plant height, a number of tillers hill-¹, panicle length, filled and unfilled grains panicle^-1, 1000- grain weight, grain and straw were recorded. The analysis of variance for crop parameters and also for nutrient contents and nutrient uptake by grain and straw were done following the principles of F statistics. The mean results with significant F- value were compared by the Duncan's Multiple Range Test (DMRT).

Source of Information: International Journal of Natural and Social Sciences 2 (2015) 66-71

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the entire observation, it is distinct that the yield obtained from treatment T₂ (Recommended Fertilizer Dose), T₅ (80% of RFD), and T₆ (90% of RFD) is statistically similar. The treatment T₂ is recommended dose for the cultivation of BRRI dhan29 which provides a higher yield. But there is no significant yield difference among T₂, T₅, and T₆. T₂ treatment is comprised of 100% of RFD whereas, the treatment T₅ and T₆ are comprised of 80% and 90% of RFD respectively. So it is worth using 10% and 20% excess fertilizer which ultimately increases the cost of production. The present study suggests that the treatment comprising 80% RFD can be used to get the highest yield from BRRI dhan29.

Knowledge Management: Journal