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Development of Cost Effective Nutrient Composition for Soilless Cultivation

M.R. Karim
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

M.M.R. Talukder
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

E. Mahmud
Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Abstract/ Executive Summary:

The developed chemical composition is a unique plant nutrient solution for hydroponic crop cultivation. In this composition HNO₃, CaO and KOH is used instead of KNO₃ and Ca(NO₃)₂ as N, K and Ca sources. This cut the solution price ten times than the present one. Besides some portion nitrogen is supplied from diammonium phosphate. This composition has the ability to maintain a constant pH level in between 5.5-6.5 by buffering the solution and give healthier plant growth. The composition presents all the nutrients necessary for plant growth in the form of NH₄⁺, NO₃^--, K⁺, Ca⁺⁺, Mg⁺⁺, SO₄^--, H₂PO4^-, Fe⁺⁺, Mn⁺⁺, Zn⁺⁺, Cu⁺⁺, MoO²⁻₄. The proportion of elements may vary with crop type and growth stage. Various auxiliary agents like humic acid, Si (Silicon), etc may optionally be added to this composition depending on the crop.

Keywords: Vegetables, Watermelon, Hydroponic Culture, Soil, Soil fertility

Location: Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Commodity: Nutrition, Soil fertility

Objectives:

To invent a low cost hydroponic nutrient solution for Bangladesh.

Methodology:

This is a new nutrient composition for growing plants in hydroponic and other soilless systems. The formulation will be prepared as a package of three 100x stock solutions denoted as Stock solution A, Stock solution B and Stock solution C which will be mixed with 100 times freshwater by the end-users. The chemicals and amount required for the one-liter stock solution of each are given in the table. The composition of this invention is manufactured using convenient economical production methods. A method of preparation for 1 liter 100 X. stock solution is given below and the chemical and the amount of stock A, B,C have shown respectively. For stock, the solution has to mixed with fresh water to get a dilute solution with desired EC usually between 1.5-3 depending on the crop type and growth stage of the crop. However, it might be near about 100 times.

Source of Information: Annual Research Report 2017-2018, Horticulture Research Centre, BARI, Joydebpur, Garizpur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This composition has the ability to maintain the pH of the nutrient solution between 5 to 6.5 by buffering the solution and give healthier plant growth. This formulation contains 95% nitrogen as nitrate form (^-NO₃) and 5% nitrogen as ammonium (NH₄⁺) form which gives better root growth and ultimately better yield.

Example 1: Observation Trial of Off-Season Watermelon Production in Hydroponic Culture. The pH of the newly developed Composition nutrient solution varied between 6.3-6.6 with time and EC was 1.9-2.1 when the stock solution was diluted with 100x fresh water. In the case of Reference nutrient solution, at the time of nutrient adding pH was below 6.7 but with time it always trends to rise above pH 7. This composition will make scope for commercially cost-effective soilless cultivation in Bangladesh.

Knowledge Management: Report/Proceedings