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Effect of Arbuscular Mycorrhiza and Phosphorus on Macronutrient Contents by Chilli Cv. BARI Morich-1

S. Sultana
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202

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

M.A.H. Chowdhury
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202

M.A.H. Bhuiyan
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

A pot experiment was conducted at the net house of the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh during the period from November, 2008 to July, 2009 to evaluate the performance of different levels of phosphorus with or without mycorrhizal inoculation on macronutrient contents and their uptake by chilli cv. BARI morich-1. Nutrient contents and their uptake was significantly influenced by AM inoculation. Nutrient use efficiency in the AM inoculated plants were also significantly higher than that in uninoculated plants. The application of different levels of P lonely increased different nutrients and their uptake positively up to certain level, but at higher level influenced negatively. N, P, S, Mg contents and their uptake were the highest when P applied @ 40 Kg ha^-1 and K and Ca in shoot and root were highest in P₆₀ level. The lowest were found from 0 Kg ha^-1. Mycorrhizal inoculation in combination with 40 Kg ha^-1 produced the highest N, P, K, S, Ca and Mg contents and their uptake.

Keywords: Macro nutrients, Arbuscular mycorrhiza, Chilli.

Location: Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-2008

End Date: 00-07-2009

Program Area: Crop-Soil-Water Management

Commodity: Chilli, Chilli

Objectives:

1. To identify the effect of arbuscular mycorrhiza and phosphorus on macronutrient contents and their uptake by chilli cv. BARI Morich-1.

Methodology:

The pot experiment was conducted in the net house of the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh during the period from November 2008 to July 2009. Soil samples were randomly collected at 0-15 cm depth and put into polyethylene bags and were taken to the laboratory. Then, it was spread on the floor and sun dried for one month. When dried, the clods were broken with hammer to make it friable. The soil was sieved to remove weeds, stubbles and hard clods. A composite soil sample was kept in a polyethylene bag for chemical analysis. The experiment consists of two factors: A. arbuscular mycorrhiza (uninoculated, and inoculated) and B. five different doses of phosphatic fertilizer ( 0, 20, 40, 60 and 80 kg P ha^-1). The crop under study was Chilli cv. BARI Morich-1. The inoculum of arbuscular mycorrhizal (AM) fungi was collected from trap crop of sorghum which was preserved in the net house, Soil Science Division of Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur. There were 10 treatment combinations with or without AM. The experiment was laid out in Completely Randomized Design (CRD) with four replications. To conduct the experiment, forty earthen pots were collected and each pot was poured with 10 kg finely ground mixer of soil and well decomposed cow dung with the ratio of 5:1. Nitrogen as urea, potassium as muriate of potash, sulphur as gypsum, boron as boric acid and zinc as zinc sulphate were applied according to the Fertilizer Recommendation Guide. Urea was applied in three equal splits. One third amount of urea N and full doses of other fertilizers were applied one day before seeds sowing. The rest two thirds of urea N were applied at 100 days after sowing (DAS) and 140 DAS respectively. Triple superphosphate was applied as per treatments of the experiment dividing into five doses (P₀, P₂₀, P₄₀, P₆₀ and P₈₀ kg ha^-1). Roots of sorghum with rhizosphere soil were used as AM inoculum. Fifty gram inoculum was applied per earthen pot. A layer of AM inoculum was first placed in each pot filled with sun dried soil and was covered with a thin soil layer of 2 cm in which seeds were sown. Twenty seeds of chilli treated with sodium hypochlorite for surface sterilization were sown in each pot. Pots were irrigated up to saturation to allow the soil and inoculums to settle down in the pots. The harvesting was done by uprooting the whole plants. The soil adhering to the roots could be easily thrown away by jerking and washing with water. Soil and Ca, Mg contents and their uptake by chilli plant were analyzed following the standard methods. P, K and S contents and their uptake of whole plants by chilli plant were determined. Total nitrogen was determined by Semi- Micro Kjeldahl method. Analysis of variance was done with the help of computer package MSTATC and the mean differences of the treatments were adjudged by LSD test.

Source of Information: J. Agrofor. Environ. 4 (2): 141-145, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Inoculation of arbuscular mycorrhiza had significant effect on N content in shoot and root of chilli plant. Inoculated treatment showed the highest N content (1.14%) and the uninoculated treatment recorded the lowest N content (1.10%). Application of P₄₀ × I treatment showed the highest N content (1.35%) which was superior to all. The lowest N content (0.85%) was recorded in treatment P0 × U. In all the AM and P combinations, increasing level of P had an increasing effect on N content in chilli plant but the increasing level of P after P40×I treatment had a decreasing effect on N content.

Knowledge Management: Journal