Effect of tillage systems and carbon sequestration on soil micro flora in wheat rhizosphere
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Date
2019
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Punjab Agricultural University, Ludhiana
Abstract
The present work was aimed to evaluate the impact of different tillage systems on soil micro
flora and carbon sequestration for two consecutive seasons in rhizosphere of wheat crop. To
achieve this objective, rhizospheric soil samples were drawn from different tillage treatments
at various crop growth stages from long-term experiment (since 2016) in organically grown
basmati rice-wheat cropping system, conducted at Students Research Farm, Department of
Agronomy, Punjab Agricultural University, Ludhiana. A total of seven treatments, out of
which six were organic and one control i.e., application of recommended dose of agrochemicals
were analysed. Organic treatments comprised of different tillage systems, deep
tillage (DT), zero tillage (ZT) and conventional tillage (CT) added organic amendment (paddy
straw mulch). Different soil physico-chemical parameters soil pH, electrical conductivity,
available phosphorous and potassium were significantly increased in conjugation of zero
tillage with organic amendments. Microbial and different enzyme activities did not differ
much. Carbon sequestration parameters, soil organic carbon and basal soil respiration,
increased with incorporation of organic amendments, especially in zero tillage compared to
conventional and deep tillage. Root parameters such as root length, root diameter and root
biomass, were not influenced by tillage types. However, ZT observations were higher than
DT and CT.
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