Ratooning response of lowland rice (Oryza sativa L.) varieties to cutting height of ratoon crop

Banoc, D.M.; Sevillano, R.; Asio, V.B.

doi:10.21608/svuijas.2021.89810.1136

Ratooning response of lowland rice (Oryza sativa L.) varieties to cutting height of ratoon crop

Document Type : Original Article

Authors

¹ Department of Agronomy, Visayas State University, Visca, Baybay City, Leyte, Philippines.

² College of Agriculture and Fisheries, Capiz State University, Pontevedra Campus, Bailan, Pontevedra, Capiz, Philippines.

10.21608/svuijas.2021.89810.1136

Abstract

Rice ratooning is a vital production system nowadays for rice farming, albeit with low productivity due to climate change. However, lowland rice varieties differ in their ratooning performance even if grown in similar environments and management practices. It could be due to their environmental adaptability and biological plant responses because of tillering behavior, cutting height, fertilization, and water availability. In counteracting said constraints, a study was conducted to evaluate the effect of cutting height on the growth and yield responses of ratooned lowland rice varieties. Identify the best lowland rice variety that will produce maximum ratoon yield as affected by cutting height. Determine the profitability of ratooning lowland rice varieties as influenced by cutting height of ratoon crop. Ratooned lowland rice varieties matured earlier, produced remarkably longer stem elongation and panicle length, achieved a higher percentage of filled grains and heavier grain yield at a cutting height of 15 cm than at 45 cm. NSIC Rc216 produced the highest grain yield and most profitable among all lowland rice varieties at a cutting height of 15 cm. The study strongly recommends using NSIC Rc216 rice variety and cutting height of 15cm for the excellent ratooning performance of lowland rice, which suggests an adaptive technique in combating climate change.

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