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20221
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Subject: Agronomy × Author: Anshmeet × Start date: 2020 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Effect of crop geometry and nitrogen levels on herb and oil yield and quality of spearmint (Mentha spicata L.)
    (Punjab Agricultural University, Ludhiana, 2022) Anshmeet; Rajender Kumar
    The present investigation entitled ‘Effect of crop geometry and nitrogen levels on herb and oil yield and quality of spearmint (Mentha spicata L.)’ was carried out at Research Area, School of Organic Farming, Punjab Agricultural University, Ludhiana during two successive years 2019 and 2020.The experiment was laid out in split plot design, keeping combinations of two varieties (MSS-5 and Local) of spearmint and two row spacing’s (45 cm and 60 cm) in main plots and four nitrogen levels (0, 50, 75 and 100 kg ha-1) in sub plots. The treatments were replicated three times. The soil of the experimental site was sandy loam in texture with slightly alkaline soil reaction (pH- 7.9), low in organic carbon and available nitrogen, medium in available phosphorus and potassium. Spearmint variety ‘MSS-5’ performed significantly superior than ‘Local’ variety in plant growth attributes (stool population, plant height, dry matter accumulation, leaf area index) and produced higher (9.3 and 14.1 per cent) fresh herb yield than ‘Local’ (155.3 q ha-1 and 145 q ha-1) during 2019 and 2020, respectively. ‘MSS-5’ variety produced significantly higher oil yield than the ‘Local’. Planting of spearmint at 45 cm row spacing produced significantly higher fresh herb yield (5.1 and 10.6 per cent) than 60 cm (158.8 q ha-1 and 147.4 q ha-1) during 2019 and 2020, respectively. Application of 75 kg N ha-1 produced significantly higher fresh herb and oil yield than 0 kg N ha-1 and 50 kg N ha-1 while the response beyond 75 kg N ha-1 was non-significant during both the years.