Nitrogen availability and non-aromatic rice quality under leaf color chart technique

Rustam Ali Tunio; Allah Wadhayo Gandahi; Shamsuddin Tunio; Nihaluddin Mari

doi:https://doi.org/10.38211/joarps.2024.05.265

Author(s)

Rustam Ali Tunio Department of Agronomy, Sindh Agriculture University,Tandojam, Pakistan.

Allah Wadhayo Gandahi Department of Soil Science, Sindh Agriculture University,Tandojam, Pakistan.

Shamsuddin Tunio Department of Agronomy, Sindh Agriculture University,Tandojam, Pakistan.

Nihaluddin Mari Sugarcane Research Institute, ARC Tandojam, Pakistan.

Abstract

Leaf Color Chart (LCC) is applied at critical crop growth stage to avoid higher N application rates than standard recommended N rate whether it requires to be adjusted up or down considering leaf color; as it helps estimate plant N requirement for higher economic yields. This study investigated the impact of nitrogen (N) application rates using the Leaf Color Chart (LCC) method on non-aromatic rice yield and quality. Seven N levels, including the recommended dose, were applied to three rice varieties (DR-92, Shahkar, and DR-82) in a factorial experiment. Results showed significant effects of N levels on plant height, biological yield, paddy yield, harvest index, N uptake efficiency, amylose content, and gel consistency. Variety Shahkar was found to be more nutrient responsive and profitable. Optimal N application rates varied depending on the LCC reading, with 25 kg N ha-1 at LCC Col 3 showing the highest paddy yield. This study demonstrates the effectiveness of the LCC method in optimizing N application for improved rice yield and qualitive and can be grown in any rice tract more profitably as compared to DR-82 or DR-92 rice varieties.

Publication Details

Page(s) 321-338

DOI https://doi.org/10.38211/joarps.2024.05.265

Published Journal: Journal of Applied Research in Plant Sciences (JOARPS), Volume: 5, Issue: 2, Year: 2024

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Keywords

grain quality, LCC, yield, Growth, Rice, nitrogen, varieties, Non-aromatic

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