Effects of different planting methods on rice (Oryza sativa L.) crop performance and cost of production

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Chezang Dendup, Ngawang Chhogyel, Ngawang

ABSTRACT

A field experiment was conducted at ARDC-Samtenling research station in 2017 to study the performance of rice using different rice planting methods. Four planting methods, namely line transplanting, random transplanting, drum seeding and broadcasting were applied on rice variety, Bhur Kambja-I that is currently considered as the best improved variety released for the low altitude rice agro-ecosystem. Rice cultivation in general and transplanted rice in particular is beset with issues of farm labor shortage and high cost of production in Bhutan. The results of the experiment showed that the planting methods did not have any significant effects on the grain yield and yield components. Grain yields for the different planting methods ranged between 3.10 ton/ha to 4.03 ton/ha. There was also no effect on yield components such as number of productive tillers and filled grains per panicle. However, the planting methods had significant effect on the crop maturity duration by about two weeks. Direct seeded rice matured early (113 days) while transplanting took 123 days. Further, direct seeding using either drum seeder or broadcasting had comparative advantage over transplanted rice in terms of labor requirement and cost of production. The cost advantage was found to be as high as 53% for drum seeding and 42% for broadcasting methods compared against line transplanting method. Based on the study, direct seeded rice could be promoted since it showed potential for promotion.

KEYWORDS:

Agro-ecosystem; Crop performance; Grain yield; Planting methods

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