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Nutrient Management on Leaf Area Index of Potato-mungbean-t. Aman Rice Cropping Pattern

M A H S Jahan
PSO
RWRC, BARI, Gazipur

Abstract/ Executive Summary:

A field experiment was conducted at Regional Wheat Research Centre of the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh for 2 consecutive years during 2006-07 and 2007-08. The objective was to find out the optimum nutrient management practice on leaf area index of each component crop of potato-mungbean-T. Aman rice cropping pattern. Twelve nutrient management treatments were tested in RCBD with 3 replications. Treatments combination based on cropping pattern were; T₁=HYG (0-198-44-194-24-6-1.2 for potato; 0-24-40-48-24-3-1.2 for mungbean ; 0-80-16-44-12-2-0 for T. Aman rice ), T₂=MYG (0-140-34-138-18-4.5-0.9 for potato; 0-20-36-40-20-2-1 for mungbean ; 0-56-12-32-8-1.5-0 for T. Aman rice), T₃=IPNS (10000-168-38-170-18-6-1.2 for potato ; 5000-9-37-36-21-3-1.2 for mungbean ; 5000-65-13-32-9-2-0 for T. Aman rice), T₄=STB (0-171-40-164-22-5-1 for potato; 0-20-36-40-22-2-1 for mungbean ; 0-68-15-37-11-2-0 for T. Aman rice), T₅=FP (0-97-16-91-0-0-0 for potato ; 0-6-5-4-0-0-0 for mungbean ; 0-39-37-12-0-0-0 for T. Aman rice), T₆=CON (0-0-0-0-0-0-0 for potato, mungbean and T. Aman rice) kg ha^-1CDNPKSZnB, T₇=HYG+CRI, T₈=MYG+CRI, T₉=IPNS+CRI, T₁₀=STB+CRI, T₁₁=FP+CRI, T₁₂=CON+CRI for potato-mungbean T. Aman rice cropping pattern respectively. Average of two years data showed that HYG+CRI treatment gave maximum LAI followed by HYG, IPNS+CRI, IPNS, STB+CRI and STB treatments at 60 days after planting (DAP) for potato, at 50 days after sowing (DAS) for mungbean, at 60 days after transplanting (DAT) for T. Aman rice, respectively. For potato, there was a significant (p≤0.01) and positive linear relation between the LAI at 60 DAP and the tuber yield. While there was a significant (p≤0.01) and positive linear relationship between the LAI at 50 DAS and seed yield of mungbean. In case of T. Aman rice, there was a significant (p≤0.05) as well as positive linear relationship between the LAI at 60 DAT and the grain yield of rice.

Keywords: Leaf area index, Potato, Mungbean, T. Aman, Nutrient and Crop residue management

Location: Gazipur

Start Date: 00-00-2006

End Date: 00-00-2008

Program Area: Farming System

Commodity: Fertilizer

Objectives:

To find out the optimum nutrient management practice on leaf area index of each component crop of potato-mungbean-T. Aman rice cropping pattern.

Methodology:

The experiment was carried out at the Regional Wheat Research Centre of Bangladesh Agricultural Research Institute Joydebpur, Gazipur. The experimental field of Gazipur belongs to the agro-ecological zone of Modhupur Tract (AEZ-28) Morphological characters are Grey Terrace soils, medium high land, not well drained, above flood level and grey soil clour. Physiological characters are silty loam to loam having more or less near neutral soil pH with very low to low soil fertility. The initial soil of the experimental field was analyzed for chemical properties before setting up the experiment. For HYG, MYG and IPNS management recommended cowdung was adjusted into chemical nutrient and added according to the thumb rule i.e. 1 ton decomposed cowdung contains 3 kg N, 0.6 kg P, 2.4 kg K and 0.6 kg S. (BARC, 2005). Average of two years (according to irrespective treatments), potato residues (0.42 to 2.31 t ha^-1 dry foliage); mungbean residues (1.03 to 2.44 t ha^-1 dry biomass); T. Aman rice residues (0.54 to 2.25 t ha^-1 dry straws) were in-situ incorporated to the soil for crop residue incorporation plots just after harvest of each crop. Crop residue incorporation was done manually through soil pulverization by spade after chopping with knife. The crops were weeded and irrigated whenever required. The crops were harvested at full maturity. Leaf area was measured for potato and mungbean at 10 days intervals starting from 30 DAP (for potato) and 30 DAS (for mungbean) up to harvest while in case of Aman rice it was measured at 15-day intervals starting from 30 DAT up to harvest. Leaf area was measured from five hills for potato and T. Aman rice while five plants for mungbean that were randomly selected for destructive sampling in each plot excluding border hills. Each time destructive samples were uprooted and washed with water. The leaf blades were separated from the leaf sheath in case of rice but in case of potato and mungbean, leaves were separated from the stem. Leaf area was measured by a Leaf Area Meter LI-300 (USA).

Source of Information: Bangladesh J. Agril. Res. 39(3): 2014

Article Link (Online Journal):

Funding Source:

1.	Budget: 100000

Total Budget (Tk.) : 100000

Achievement/Findings:

HYG+CRI treatment gave the highest LAI at 60 DAP for potato, while at 50 DAS for mungbean and at 60 DAT for T. Aman followed by HYG, IPNS+CRI, IPNS, STB+CRI and STB, respectively rice in both the years. There were significant and positive linear relation between the LAI and the tuber yield of potato, seed yield of mungbean and the grain yield of T. Aman rice at 60 DAP, 50 DAS and 60 DAT, respectively.

Knowledge Management: Journal