‘Soil health hit due to use of organic chemicals’

Source: The Hitavada      Date: 13 Sep 2017 11:15:14


 

By Piyush Shrivastava,

These are very persistent because micro organisms and other agents that normally bring about the biodegradation of natural materials are either unable to break down these stable molecules left in soil as residue or can do so only extremely slowly,” said Dr Priyankar Raha, Department of Soil Science and Agriculture Chemistry, Institute of Agricultural Sciences, BHU, Varanasi

“The application of synthetic organic chemicals on large scale is resulting in deterioration of the soil health conditions. Normally, these agents or molecules are called persistent organic pollutants incepted in middle of nineteenth century and came in mass production. These are very persistent because micro organisms and other agents that normally bring about the biodegradation of natural materials are either unable to break down these stable molecules left in soil as residue or can do so only extremely slowly,” said Dr Priyankar Raha, Department of Soil Science and Agriculture Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi while exclusively talking to ‘The Hitavada’, on Monday.


He is in city to attend the national repute event of 7th Dr N P Datta Memorial Lecture organised by All India Soil Science Society at JNAU.
He further said ongoing studies about impact of these stable molecules on environment and human health reveals that persistent organic molecules are known as persistent organic pollutants and could be classified in different types depending upon use of molecule like fertilizer, pesticides, industrial chemicals and products for industrial usage.

The residue of these POPs were traced mostly in all spheres of earth and in all the environmental components like soil, ground water, river water, ocean and even high altitude Himalayas. Owing to the lyophilise and hydrophobic nature, POPs undergo biomagnifications up the food chain. The humans and animals consuming POPs through dietary sources may face adverse impact on health due to carcinogenic and mutagenic effects.


Professor Raha said “Now the question arises how to mitigate the impact of these synthetic bio stimulants, especially when it is related to plant health. Initially, we have to understand about natural way of procurement of soil micronutrients health.

Naturally, there are microbial inoculants that are free living bacteria, fungi, etc. The microbial inoculants are gaining more attention across the world as they enhance nutrient uptake and being incepted as concept through integrated crop management practices. In Western world, farming is nearly free from synthetic inputs and has cut around 90 per cent of production while increased microbial inoculants.


Application of humid acid as biostimulants and soil conditioners that can help in reducing losses due to pests while in similar lines, the protein hydrolytes and amino acids have been reported to stimulate the plant growth and enhanced tolerance to biotic and abiotic stresses. Fourth source is seaweed, which is used after composting as a soil amendment to enhance soil fertility and crop productivity. A wide range of seaweed extract products is available worldwide for use in agriculture and horticulture with high rate of performance.


The use of bio-based methods would help in retaining the soil health that could help us in breaking stable molecule of persistent organic pollutants, while it would give fresh agricultural and horticultural products.