Anionic effect on manganese uptake by wheat (Triticum aestivum L.), its vertical distribution and release behaviour in different soils
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Date
2016
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
In order to evaluate the anionic effect on manganese uptake by wheat (Triticum aestivum L.),
its vertical distribution and release behaviour in different soils, laboratory as well as screen house
experiments were conducted at CCS HAU, Hisar during the year 2013-15.The results of the pot study
revealed a significant increased in yields, content, uptake of Mn by wheat and Mn content in soil with
the application of NO3
-, PO4
3- and Mn, whereas it was significantly decreased with increasing levels of
HCO3
- and Cl-. The highest yields of grain and straw were recorded with 90 mg NO3
- kg-1 and 60 mg
PO4
3- kg-1 along with 25 mg Mn kg-1 and no addition of HCO3
- and Cl-. Maximum Mn content and its
uptake in wheat grain and straw were recorded with 90 mg NO3
- kg-1 and 60 mg PO4
3- kg-1 with 50 mg
Mn kg-1 and no addition of HCO3
- and Cl- in soil. In pot experiment, Mn fractions content increased
with the application of graded level of NO3
-, PO4
3- and Mn whereas it was significantly decreased with
the application of increasing level of HCO3
- and Cl-. Among Mn fractions in post harvest soils,
maximum Mn was associated in residual (RES) fraction followed by MnOX > AFeOX > CFeOX > EX
> CARB > OM fractions. Organic matter bound (OM) showed a very littile amount of Mn content due
to the low content of organic carbon in experimental soil. Under depth-wise distribution of Mn
fractions, all fractions of Mn in soil decreased significantly with increasing soil depth in all the
cropping system. The mean DTPA-Mn concentration was highest in cotton-wheat cropping system.
Among various Mn fractions, maximum was found associated in residual (RES) form which accounted
for 58.08 % and minimum in organic matter bound (OM) form which accounted for 0.03 % of total
Mn. Based upon the linear coefficient of correlation between Mn fractions and soil properties, the
organic matter, silt and clay fraction showed greater importance and found significantly positively
correlated with Mn fractions. Total manganese content in soil particles (i.e. sand, silt and clay) under
all cropping system was associated maximum in silt fraction (52.78 %) whereas it was minimum in
sand fraction (14.86 %) . Manganese associated with different soil fraction was found in the order of:
Silt > Clay > Sand. For understanding the periodically release behaviour of Mn in different cropping
system soils, DTPA-Mn content in paddy-wheat was found to release Mn upto 40 days and thereafter
the release of Mn remain almost constant and in cotton-wheat, sugarcane-sugarcane it was continuously
release Mn upto 50 days whereas in pearl millet-wheat, pearl millet-mustard and fellow-mustard
cropping system, the release of Mn was noticed only upto 30 days and thereafter the release of Mn
remain constant.
Description
Keywords
Manganese, Wheat, Uptake, Fraction, Cropping system, Soil particle, Releasing behaviour