Effect of Nickel and Farmyard Manure on Wheat Yield and Nickel Concentration in Texturally Different Soils

摘要

A screen house experiment was conducted to study the interactive effect of nickel and Farmyard manure on wheat crop raised in texturally different soils. The treatments comprised of seven nickels levels (0, 5, 10, 20, 40, 80 and 120 mg kg~(-1) soil), four FYM levels (0, 0.25, 0.5 and 1.0%) and two soil textures (sand, clay loam), which were replicated thrice in completely randomized design. Application of nickel reduced the grain and straw yield of wheat significantly in sand. In clay loam soil there was no significant decrease in grain and straw yield of wheat with increasing nickel application up to 120 mg Ni Kg~(-1) of soil. Application of FYM increased the grain and straw yield in both the soils without application of nickel, however the increase in yield was not significant. Application of FYM mitigated the deleterious effect of Ni in sand. The increase in grain yield was to the tune of about 20 times at 120 mg Ni Kg~(-1) soil with application of 1% of FYM. It has also been observed that application of FYM could mitigate the adverse effect of 40 mg Ni Kg~(-1) soil on wheat yield. Application of nickel increased the Ni content of grain and straw in both the soils. However the Ni concentration was almost two times more in sand as compared to clay loam soil. There was no significant effect of FYM application on Ni concentration in wheat grain and straw in the absence of soil applied Nickel. Application of 1% of FYM decreased the Ni concentration of wheat grain and straw in sand. Besides increase in productivity, the Ni concentration of food material (grain and straw) could be harmful for the living beings fed on it.