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Effect of Different Levels of Chitosan Application on Yield of Boro Rice

Dr. M. Monjurul Alam Mondal
Principal Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Dr. Nirmal Dafadar
Chief Scientific Officer
Nuclear Chemistry Division, Bangladesh Atomic Enery Commission, Savar, Dhaka.

Dr. A. H. M. Razzaque
Chief Scientific Officer
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The experiment comprised of (a) hormone spray at three growth stages of vegetative, booting and heading phase i. e. (i) Chitosan spray one time at tillering stage only, 30 DAT; (ii) Chitosan spray two times both at tillering and booting stages, 30 and 60 DAT; and (iii) Chitisan spray three times at tillering, booting and heading stages, 30, 60 and 90 DAT and (b) four levels of Chitosan viz., 0, 25, 50 and 75 ppm. The plant parameters were greater in Chitosan applied plants than control plants. The higher grain yield was recorded in 25 and 50 ppm with being the highest in 50 ppm due to increased grains panicle^-1. The grain yield as well as harvest index was lower in 75 ppm than 25 and 50 ppm Chitosan indicating application of Chitosan @ 75 ppm may be toxic for boro rice production. Results showed that grain yield was the highest when Chitosan was sprayed @ 50 ppm at two growth stages of tillering and booting and also showed good dry matter partitioning to economic yield (51.5%). So, Chitosan may be applied @ 50 ppm at two growth stages of tillering and booting for increased grain yield of Boro rice.

Keywords: Foliar spray, Chitosan, Boro rice, Grain yield

Location: Experimental farm, Bangladesh Institute of Nuclear Agriculture, Jamalpur

Start Date: 10-12-2010

End Date: 20-05-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To investigate the response of foliar application of Chitosan on yield attributes and yield in Boro rice under Bangladesh conditions.

Methodology:

The experiment was conducted at the field Laboratory of Bangladesh Institute of Nuclear Agriculture, Jamalpur, during the period from December 2010 to May 2011 to investigate the response of grain yield to different concentrations of Chitosan hormone under three growth stages. Iratom-24 was used as planting material. The experiment comprised of (a) hormone spray at three growth stages of vegetative, booting and heading phase i. e. (i) Chitosan spray one time at tillering stage only (T₁), 30 days after transplanting (DAT); (ii) Chitosan spray two times both at tillering and booting stages (T₂), 30 and 60 DAT; and (iii) Chitisan spray three times at tillering, booting and heading stages (T₃), 30, 60 and 90 DAT and (b) four levels of Chitosan viz., 0, 25, 50 and 75 ppm. The experiment was laid out in two factors randomized complete block design with three replications. The unit plot size was 4 m × 3 m. Plant spacing was 20 cm × 20 cm. Fertilizers such as urea, TSP, MP and gypsum were applied @ 185, 150, 80 and 40 kg ha^-1, respectively. Urea was applied in three splits at 10, 30 and 50 DAT and other fertilizers were applied as basal dose during the final land preparation. Other cultural practices such as weeding and pest control were done as and when necessary for normal plant growth and development. At harvest, ten plants were selected from each plot for collecting yield and yield contributing characters. The plot yield was converted into tons/ha. The collected data were analyzed statistically.

Source of Information: Annual Report, 2010-11. Bangladesh Institute of Nuclear Agriculture, Mymensingh. pp. 79-80.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Foliar application of chitosan at vegetative stage enhances plant growth and development which resulted increased grain yield in rice. Among the concentrations, 50 ppm had superiority for plant growth, yield components and seed yield over 25 and 75 ppm. Therefore, application of chitosan two times @ 50 ppm may be recommended for rice cultivation after few more field trials.

Knowledge Management: Report/Proceedings