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Effect of Different Rates and Methods of Zinc Application on the Yield and Nutritional Qualities of Rice Cv. Br11

M. A. Hossain
Department of Biochemistry, Bangladesh Agricultural University, Mymensingh-2202

M. A. Hannan
Department of Biochemistry, Bangladesh Agricultural University, Mymensingh-2202

N. M. Talukder
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. A. Hanif
Department of Biochemistry, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

An experiment was carried out at the main farm of Bangladesh Agricultural University, Mymensingh to study the influence of different rates and methods of zinc application on yield and nutrient content of rice cv. BR11 and also the nutrient status of post-harvest soil. The experiment was laid out in randomized complete block design with three replications using zinc for soil application @ 0, 5, 10 and 15 kg ZnSO₄ ha^-1 and foliar application @ 0.1 %, 0.3 %, 0.5 % and 0.7 % ZnSO₄ solution along with basal dose of urea, triple super phosphate (TSP), murate of potash (MP) and gypsum. The study revealed that most of the yield and yield attributing characters except a few were significantly influenced by the soil and foliar application of zinc. The highest grain yield was recorded with the foliar application of 0.5 % ZnSO₄ solution; while the lowest was recoded in no zinc treatment. Among the nutrient contents, phosphorus, potassium, magnesium, sulphur, and zinc in grains varied significantly due to different zinc applications; but nitrogen content was not significantly changed. Different rates and methods of zinc application significantly affected the starch content in grains and straw but protein content did not vary significantly. The highest percentage of protein and starch was found in the treatment of 0.5 % ZnSO₄ solution. Results on post-harvest soil analyses revealed that zinc application had an agonistic effect on N, Mg, S and Zn contents, but antagonistic effect on P and K contents. The overall results suggest that foliar application of zinc at 0.5 % ZnSO₄ solution showed the best performance in respect to yield and nutritional qualities of rice.

Keywords: Yield, Nutritional qualities, Soil and foliar application, Zinc sulphate, Rice cv. BR11

Location: North-West corner of the main farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2007

End Date: 00-11-2007

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To explore the effect of different rates and methods of zinc application on the yield and nutritional qualities of rice.

Methodology:

The field experiment was carried out in a typical rice growing soil to the North-West corner of the main farm of Bangladesh Agricultural University, Mymensingh. Chemical analyses of the initial soil sample of the experimental plots showed the basic soil properties like pH, organic carbon, organic matter, total N, exchangeable K, Mg, available P, S and Zn were 6.51, 0.73 %, 1.26 %, 0.13 %, 0.06 meq/100 g soil, 2.29 meq/100 g soil, 12.29 ppm, 9.21 ppm and 2.51 ppm respectively. The basal doses of TSP, MP and gypsum were applied during the land preparation and urea was applied in three splits. The experiment was laid out in randomized complete block design with three replications. There were eight treatments comprising 3 levels of soil applied zinc treatment, viz. 5, 10 and 15 kg ZnSO₄ ha^-1 and 4 levels of foliar application, viz., 0.1 %, 0.3 %, 0.5 % and 0.7% ZnSO₄ solution along with a control (no zinc treatment). The unit plot was 10 m² (4 m × 2.5 m). Thirty days old seedlings of Aman rice cv. BR 11 (Mukta) were transplanted on August with a spacing of 15 cm from hill to hill and 25 cm from row to row. Intercultural operations like irrigation, weeding, insect pest control were done whenever required. The crop was harvested at 114 days after transplantation at full maturity. Plot-wise yield and yield attributes were recorded. Samples (grain, straw and post-harvest soil) were analyzed physically and chemically following the standard procedures. All data were statistically analyzed using the MSTATC. Duncan’s Multiple Range Test (DMRT) was used to compare variation among the treatments.

Source of Information: J. Agrofor. Environ. 2(1): 1-6, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that foliage applied 0.5 % ZnSO₄ solution exerted best result regarding yield and nutritional qualities of rice. Finally, it might be suggested that 0.5 % ZnSO₄ solution by foliar application be employed with basal doses of other essential nutrients in soil as used in the present study.

Knowledge Management: Journal