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Effect of Soil Moisture Regimes on Growth and Yield of Mulberry

N. K. Paula
Department of Botany, University of Rajshahi, Rajshahi 6205, Bangladesh

M. A. Qaiyyumb
Bangladesh Sericulture Research and Training Institute, Rajshahi, Bangladesh.

Abstract/ Executive Summary:

Effect of three levels of irrigation viz., no irrigation (I₀), irrigation once a month (I₁) and irritations twice a month (I₂) on some growth attributes and leaf yield and some of its components of five mulberry varieties were studied in field condition. Significant effect of irrigation on relative growth rate (RGR), net assimilation rate (NAR), leaf area ratio (LAR), and relative leaf growth rate (RLGR) was observed. irrigation also had significant effect on leaf yield and some of its components. The overall results indicated that twice irritations in a month with mulberry variety BM-4 could be used for higher leaf yield.

Keywords: Mulberry, lrrigation, Growth parameters, Leaf yield

Location: Bangladesh Sericulture Research & Training Institute, Rajshahi

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Mulberry

Objectives:

To study the effect of irrigation on growth and yield of mulberry in Bangladeshi growing condition.

Methodology:

Five improved mulberry varieties viz., BM-1, BM-2, BM-3, BM-4 and BM-5 were used. The experiment was conducted in the research field of Bangladesh Sericulture Research & Training Institute, Rajshahi. Soil of the field was sandy clay loam having pH 7.2 and low in organic matter (0.77%) and N (0.08%). The experimental field was prepared by deeply (30-35 cm) and repeatedly ploughing, cross-plough and leveled properly for preparing it homogenous as far as possible. Basal dose of organic manure at the rate of 19 t/ha was applied. The inorganic fertilizers such as NPK were applied at the rate of 150 kg N/ha,75 kg P/ha and 35 kg K/ha. The experiment was conducted in a split plot design with 3 replications. Mulberry cuttings were planted in pit system. Initially, 3 cuttings were planted in each pit but only the vigorous one was finally allowed to grow per pit. The distance between the lines and that between the plants was 60 cm and 45 cm, respectively, proper cultural operations, particularly weeding digging and proper pruning were done regularly as and when necessary. Three levels of irrigation were used as follows: I₀= No irrigation, I₁= Irrigation once in a month (mid time) and I₂= Irritations twice a month (15 days interval). The experiment was done only in two seasons in a year, which were the drought period. The seasons were February-April and November-January. The pooled data are presented in this paper. Three harvests were done in each season as H₁= 30 days after planting (DAP), H₂= 60 DAP and H₃= 90 DAP. Measurement of dry weight (stem and leaves) and leaf area were recorded. Growth attributes were calculated. Leaf yield and yield component characters such as plant height, branch number/plant, leaf number/branch, leaf size and leaf yield/plant were recorded. Statistical analysis of the data was done.

Source of Information: Bangladesh J. Sci. Ind. Res. 45(4), 331-336, 2010

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Significant effect of irrigation on relative growth rate (RGR), net assimilation rate (NAR), leaf area ratio (LAR), and relative leaf growth rate (RLGR) was observed. irrigation also had significant effect on leaf yield and some of its components. The overall results indicated that twice irritations in a month with mulberry variety BM-4 could be used for higher leaf yield.

Knowledge Management: Journal