Vol. 18 No. 1
Emergence and growth of weedy rice species in response to soil burial depth, moisture and period of sowing
Author(s): A. Mukherjee and B. Duary
Abstract: An experiment was executed to reveal the emergence and growth of different species of weedy rice under different soil burial depth, moisture condition and sowing time during the year of 2017- 2018 as a pot culture experiment. Seeds of the species were sown in seven soil depths i.e., 0, 2.5, 5, 7.5, 10, 12.5 and 15 cm. Two water regimes (saturated and unsaturated) were maintained for the experiment. The seeds were sown in consecutive eight months starting from July, 2017 to February, 2018. The experimental findings revealed that the highest germination and emergence percentage was recorded in the month of August. The lowest germination percentage was recorded in the month of January. The germination and emergence of all the species were higher in 0.0 cm soil depth and it gradually decreased with increase in soil depth. Out of four species under study Oryza minuta recorded the highest germination and emergence on 15 cm burial depth. In case of O. rufipogon the highest germination percentage was exhibited in the month of September and lowest in December. O. minuta showed the lowest germination percentage in the month of January and showed highest germination percentage in the month of August. O. barthii registered the highest germination percentage on the month of August. The emergence capability and the growth behavior of species of weedy rice were greatly controlled by burial depth of soil, soil moisture condition and month of sowing.
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