Affiliation:
1. Vidyasagar University
2. Bidhan Chandra Krishi Viswavidyalaya
3. Water Management Research Station
Abstract
The relationship of soil physico-chemical parameters with disease
suppressiveness property of soil is not well understood phenomenon. In this
regard, the surveys were conducted on the occurrence of collar rot disease
caused by Sclerotium rolfsii in two districts (North 24 Parganas and Nadia)
of West Bengal Gangetic new alluvial region of India from February to
March, 2016. Soil samples were screened through the disease conduciveness
and suppressiveness. The physicochemical properties of soils showed that
the clay loam soil dominated in new the alluvial region of West Bengal. It
was found that soil suppressiveness against S. rolfsii significantly
positively correlated with soil aggregate ratio (AR). PCA explained the
closeness of the parameters with soil suppressive index (SI) and aggregate
stability (AS). Mostly the exponential relationship has been observed among
the selected physico-chemical parameters. From this study we found AR, AS
and bulk density were most determining parameters for S. rolfsii soil
suppressiveness. Such indicators of soil health would be very beneficial
for forecasting potential risks and providing guidance on appropriate
farming techniques for specific geographic areas or microclimates. However,
further investigation is required to fully comprehend the impact of
physical and chemical properties on soil suppressiveness.
Funder
ICAR - National Agricultural Science Fund
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