Quality improvement in paddy seeds during seed processing
Paddy seeds quality improvement
DOI:
https://doi.org/10.21921/jas.v10i04.14384Keywords:
paddy, seed processing, germination, seed qualityAbstract
The improvement of paddy seed quality through basic processing machines comprising seed pre-cleaner, seed grader and a specific gravity separator was investigated. The product and rejects of these machines were evaluated for seed quality parameters. There was an enhancement in seed quality parameters after passing through the seed processing machines. The seed germination from reject outlet of processing machines ranged from 27.00% to 54.67%, which increased to 71.67%, whereas unprocessed seeds recorded a germination rate of 64.80%. There was an improvement by 12.56%, 21.32%, 28.19%, and 27.91% in 1000-seed weight, seedling dry weight, vigour index-I, and vigour index-II, respectively in processed seeds, compared to unprocessed seeds. All the seed quality parameters were significantly lower in reject samples. Principal component analysis (PCA) reveals that all the samples from rejects, except one, grouped into a single cluster. PCA reveal a close relationship between vigour index-II and 1000-seed weight with PC1. The results from the study indicate that seed processing is beneficial in removing low-quality seeds and improving seed quality at various processing stages. The selection of seeds up to specific gravity separator outlet 4 is beneficial for obtaining high-quality seeds in paddy.
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