Interactions of phosphorus with sulphur and nickel in maize (Zea mays)
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Date
2007
Authors
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Publisher
CCSHAU
Abstract
A pot culture experiment in screen house was conducted with
four levels each of P and S i.e., 0, 30, 60 and 90 mg kg-1 soil to study the
interaction of P and S in maize (cv HQPM 1). The dry matter yield of maize
significantly increased with 60 mg P kg-1 soil and 30mg S kg-1 soil
application. P x S interaction was synergistic at their lower levels and
antagonistic at their higher levels on dry matter yield of maize.
Concentration and uptake of P significantly increased with the
application of P and S. The highest concentration was recorded with the
combined application of 90 mg P kg-1 soil and 30 mg S kg-1 soil, whereas,
the highest P uptake was observed with combined application of 60 mg P kg-1
and 30mg S kg-1 soil. Concentration and uptake of S significantly increased
at 30mg P kg-1 and 60 mg P kg-1 soil, respectively. The concentrations of Ni,
Zn, Fe, Mn and Cu significantly decreased with increasing levels of applied P
and S, whereas, their uptake increased significantly upto 60mg P kg-1 soil
and 30 mg S kg-1 soil. Another pot culture experiment in screen house was conducted
with four levels each of P and Ni i.e. 0, 30, 60 and 90 mg P kg-1 soil to study
the interaction of P and Ni in maize (cv HQPM 1). The dry matter yield of
maize significantly increased with all levels of applied P and 30 mg Ni kg-1
soil application. P x Ni interaction was significant in dry matter yield of maize.
The adverse effect of Ni on dry matter yield was considerably ameliorated with
the higher doses of P application. Higher application of P significantly
increased the P concentration and uptake but decreased the S and Ni
concentration in maize. Higher application of Ni significantly increased the Ni
concentration and uptake but decreased the P and S concentration and
uptake. The concentrations of Zn, Fe, Mn and Cu significantly decreased with
the increasing levels of applied P and Ni, whereas, their uptake increased
significantly upto 60 mg P kg-1 soil and at 30mg Ni kg-1 soil.
Another pot culture experiment in screen house was also
conducted with four levels of each of S and Ni i.e. 0, 30, 60 and 90 mg kg-1
soil to study the interaction of S and Ni in maize (cv HQPM 1). The dry matter
yield of maize significantly increased at 30 mg S kg-1 soil and 30 mg Ni kg-1
soil only.
The concentration and uptake of S significantly increased with
increasing levels of S but it significantly decreased with increasing levels of
Ni. The concentration of P significantly increased at 30 mg S kg-1 and
decreased with increasing levels of Ni. The concentrations of Ni significantly
decreased with increasing levels of S but its uptake significantly increased at
30 mg S kg-1 soil. The concentrations of Zn, Fe, Cu and Mn significantly
decreased with increasing levels of applied S and Ni, whereas, their uptake
increased significantly at 30 mg S kg-1 soil and 30 mg Ni kg-1 soil.
The successive application of P, S and Ni significantly increased
available P, available S and DTPA extractable Ni, respectively, in post harvest
soil samples. The application of P significantly decreased available S and
DTPA extractable Ni in post harvest soil samples. The application of S
significantly decreased the available P and DTPA extractable Ni, whereas,
application of Ni significantly decreased the available P and S in post harvest
soil samples.
Description
Keywords
Phosphorus, Sulphur, Nickel, Interactions, Maize crop