Transformation of zinc in soils under submerged condition and its relation with zinc nutrition of rice |
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Authors: | Biswapati Mandal G C Hazra A K Pal |
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Institution: | (1) Micronutrient Research Laboratory, Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, 741235 Kalyani, West Bengal, India |
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Abstract: | Laboratory and greenhouse experiments were conducted with two soilsviz., laterite and alluvial to study the transformation of applied Zn in soil fractions under submerged condition in the presence
and absence of added organic matter and its relationship with Zn nutrition of rice plants.
The results showed that application of organic matter caused a decrease in the concentration of Zn in shoot and root of rice
plants and helped in translocating the element from root to shoot. The per cent utilization of applied Zn by plants was also
found to increase by the application of organic matter. The transformation of applied Zn in different fractions in soils showed
that a major portion (53.6–72.6%) of it found its way to mineral fractions leaving only 1.0–3.3, 6.6–18.9, 11.0–21.6 and 2.3–8.8%
of the applied amounts in water soluble plus exchangeable, organic complexed, amorphous sesquioxides and crystalline sesquioxides
bound fractions respectively. Application of organic matter favoured such transformation of applied Zn into these fractions
except the mineral and crystalline sesquioxides bound ones.
Simple correlation and multiple regression analyses between applied Zn in different soil fractions and fertilizer Zn content
in plants showed that organic matter application increased the predictability of fertilizer Zn content in plants which has
been attributed to the higher per cent recovery of applied Zn in plant available fractions in soils in presence of added organic
matter. |
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Keywords: | organic matter rice submergence transformation zinc fraction |
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