Effect of Moisture Regimes on Growth and Root characteristics of Rice Cultivars under Aerobic condition in Summer Season

Author: K. Indudhar Reddy, A. Zaman, Mahadev Pramanick, S.K. Patra and N.C. Das

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Abstract

A field experiment was conducted at Regional Research Station, Gayeshpur, West Bengal to study the effect of moisture regimes on the rice cultivars under aerobic condition in summer season during 2012 and 2013. The farm is located at 22°57N latitude, 88°20E longitude and at an elevation of 9.75 m above sea level. The experiment was conducted on sandy clay loam soil. The experiment was laid in split plot design replicated thrice. The treatments consisted of four irrigation regimes in main plots viz., I1: scheduling of irrigation at 60-70 % field capacity (FC) throughout the season, I2: scheduling of irrigation at 80-90 % FC throughout the season, I3: scheduling of irrigation at 60-70 % FC at vegetative stage and at 80-90 % FC at reproductive stage and I4: Control. (maintaining at 100% FC) and three varieties in sub plots viz., V1: Satabdi, V2: Khitish and V3: IR 36. The experiment was conducted to study the effect of irrigation regimes on the rice cultivars and their response under aerobic condition. The results revealed that crop under I4 (maintaining at 100 % FC) treatment recorded higher plant height at harvest (91.85 cm), drymatter accumulation at harvest (883.47 g m-2), leaf area index at flowering stage (4.33), root length (27.53 cm), root volume (14.15 cc hill-1) and root dry weight (139.73 g m-2) than that of other irrigation treatments. Among the varieties, V2 (Khitish) registered higher plant height at harvest (100.87 cm), drymatter accumulation at harvest (796.78 g m-2), leaf area index at flowering (4.11), root length (26.53 cm), root volume (13.88 cc hill-1) and root dry weight (131.81 g m-2) than that of V1 (Satabdi) and V3 (IR 36).

Keywords

Aerobic rice, irrigation regimes, rice varieties, growth parameters, root characteristics

Conclusion

Perusal of the results on effect of moisture regimes on aerobic rice growth reveals that growth attributes of aerobic rice viz., plant height, drymatter accumulation and leaf area index was significantly influenced by the irrigation regimes. From the pooled data, it was found that aerobic rice under I4 (maintaining at 100 % FC) treatment recorded higher plant height at harvest (91.85 cm), drymatter accumulation at harvest (883.47 g m-2) and leaf area index at flowering stage (4.33) than that of under I1 (scheduling of irrigation at 60-70 % FC throughout the season), I2 (scheduling of irrigation at 80-90 % FC throughout the season) and I3 (scheduling of irrigation at 60-70 % FC at vegetative stage and at 80-90 % FC at reproductive stage). Root characteristics of aerobic rice were significantly influenced by the irrigation regimes. From the pooled data, it was revealed that root length (27.53 cm), root volume (14.15 cc hill-1) and root dry weight (139.73 g m-2) of aerobic rice was higher under I4 (maintaining at 100% FC) treatment than remaining irrigation treatments. Among the three tested varieties, V2 (Khitish) registered higher growth attributes viz., plant height at harvest (100.87 cm), drymatter accumulation at harvest (796.78 g m-2) and leaf area index at flowering (4.11) than that of V1 (Satabdi) and V3 (IR 36). Root characters were significantly different among the varieties. From the pooled data, it can be revealed that root length (26.53 cm), root volume (13.88 cc hill-1) and root dry weight (131.81 g m-2) of rive variety V2 (Khitish) was significantly higher than the corresponding values in V1 (Satabdi) and V3 (IR 36).

References

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How to cite this article

K. Indudhar Reddy, A. Zaman, Mahadev Pramanick, S.K. Patra and N.C. Das (2023). Effect of Moisture Regimes on Growth and Root characteristics of Rice Cultivars under Aerobic Condition in Summer Season. Biological Forum – An International Journal, 15(1): 14-19.