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Influence of Irrigation, Fertilizer and Variety on Grain Growth of Barley (hordeum Vulgare L.)

M. S. I. Mollah
Institute of Biological Sciences, Rajshahi University, Rajshahi, Bangladesh

N. K. Paul
Department of Botany,Rajshahi University, Rajshahi, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted in the experimental field of Rajshahi University Campus (AEZ-11) to study the influence of soil moisture and NPK fertilizers on grain growth of four varieties of barley (Hordeum velgare L.). Spikelet number (SN), spike dry weight (SOW), grain number (GN), grain dry weight (GOW), spike relative growth rate (spike RGR) and grain relative growth rate (grain RGR) were observed highest in the highest level of irrigation (40 mm) . The highest amount of fertilizer (120N 75P 45K) produced the highest SN, SOW, GN, GOW, spike RGR and grain RGR. BHL-3 produced the highest SN, BARI Barley-2 produced the highest spike RGR, BARI Barley-1 produced the highest grain RGR and BL-1 produced the highest SOW, GN, and GOW.

Keywords: Irrigation, Soil moisture, Fertilizers, Barley, Grain growth.

Location: Rajshahi University campus

Start Date: 00-11-2004

End Date: 00-03-2005

Program Area: Crop-Soil-Water Management

Commodity: Barley, Irrigation scheduling, Fertilizer

Objectives:

To find out the effect of soil moisture and NPK fertilizers on grain growth of four varieties of barley .

Methodology:

The experiment was conducted in the experimental field of Rajshahi University campus (AEZ-11) during from November 2004 to March 2005 with four barley varieties, BARI Barley-1, BARI Barley-2, BHL-3 and BL-1. The soil of the field was silty loam, having pH 7.5 as well as 35% of field capacity. The experiment was arranged in split-split plot design with three replications. Each replicated field was divided into three main plots for irrigation treatment. Each main plot divided into four sub-plots for varieties of barley. Three levels of irrigation treatments (0, 20, and 40 mm as I₀, I₁and I₂ respectively) were adopted at every 30 day's interval for three times during the growing period. Four levels of NPK used (kg /ha) for N as urea were 0, 40, 80 and 120; for P as TSP were 0, 25, 50 and 75 and lastly for K as MP were 0, 15,30 and 45. These basal doses of fertilizers were applied as F_o, F₁, F₂ and F₃ at each split plot before sowing. Each split plot size was 4 mx1.8 m, i.e., 7.2 m² having a plot to plot distance 1 m to the North-South, 2 m to East -West, replication to replication distance 2 m, row to row 20 cm, and plant to plant 5 cm. Necessary intercultural operations were adopted, but no fungicides or insecticides were used. At equal intervals of seven days after anthesis (OAA), five grain harvests were done for grain growth analysis. For this, main spike plant^-1 treatment^-1 variety^-1 replication^-1 was selected, tagged with identifying marks to collect them at 7, 14,21,28 and 35 OAA. At each harvest, the spikes were packed separately in labelled paper bags and were oven dried for 72 hours at 85°C. Various components of grain growth analysis were spikelet number (SN), spike dry weight (SOW), grain number (GN) and grain dry weight (GOW). Grain growth parameters were spike relative growth rate (spike RGR) and grain relative growth rate (grain RGR) determined from between two successive harvests of spike and grain growth stages by using the following formulae according to the classical technique of growth analysis.

Source of Information: Journal of Bio- Science. Vol. 15, pp: 69-75, 2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the study, grain growth of the four barley varieties was observed highest in the highest level of irrigation and fertilizer than the control. So, proper grain growth is very much dependent on the availability of adequate amount of soil moisture and adequate quantity of fertilizer.

Knowledge Management: Journal