RESPONSE OF RICE VARIETIES GROWN ON CALCAREOUS AND ACID MIXED SOILS AMENDED BY VERMICOMPOST UNDER VARIABLE CLIMATES

M.K. Saha; H.R. Khan; M.S. Hossain; S. Akter

doi:10.29121/granthaalayah.v9.i9.2021.4183

Authors

M.K. Saha Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh
H.R. Khan Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh
M.S. Hossain Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh
S. Akter Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

DOI:

https://doi.org/10.29121/granthaalayah.v9.i9.2021.4183

Keywords:

Soil Mixing, Soil Moisture, Soil Temperature, Vermicompost, Response Of Rice

Abstract [English]

A field experiment was conducted to explore how rice (BINA Dhan 11 and BRRI Dhan 34) responds in modified soil and climatic conditions. They were planted on artificially prepared soil beds by mixing calcareous and acid soils in 1:1 and 1:3 ratios. Soil temperature (St) was elevated up to 2⁰C over the diurnal ones. Moisture (M) was maintained at 50%, 70%, and saturated (100%) soil conditions. Vermicompost (V) was applied at the rates of 0, 10, and 15 tha^-1. The number of tillers and plant height were recorded at 25 days intervals. The maximum number of 26 and 27 tillers for BINA Dhan 11 and BRRI Dhan 34 were recorded. The longest plant height was observed with the T₁₀(V₁₅M₁₀₀) treatment. The treatment T₃(V₁₅M₁₀₀) resulted in maximum fresh weight of shoot and shoot dry matter production for both rice varieties in 1:3 mixed soil. Both varieties performed well in 1:3 mixed soils and elevated temperature conditions, as observed for normal soils. This evidence concluded that the improvement of calcareous and acid soils through their mixing is a successful approach and confirmed by the treatments' usual responses on different rice growth parameters under these mixed soils.

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