MADRAS AGRICULTURAL JOURNAL

Effect of Plant Growth Regulators on Rooting and Sprouting of Different Stem Cuttings ofGuava (Psidium guajava L.) cv. Lucknow-49 under Mist Chamber Condition

Abstract

      An experiment was conducted to study the effect of plant growth regulators on rooting and sprouting of different stem cuttings in guava under mist chamber condition at Horticultural College and Research Institute, Periyakulam, Tamil Nadu. Plant growth regulators viz., Indole-3-Butyric Acid (IBA), Indole-3-Acetic Acid (IAA) and Naphthalene Acetic Acid (NAA) were used at different concentrations and applied to softwood, semi hardwood and hardwood cuttings. The highest sprouting percentage (76.66 %) with early sprouting (19.10 days) was observed in softwood cutting treated with IBA 4000 ppm concentration. The highest number of leaves (25.80) at 90 days after planting was observed in hardwood cutting treated with IBA 4000 ppm concentration. The highest rooting percentage (74.44 %) was recorded in softwood cutting treated with IBA at 4000 ppm concentration. Softwood cutting treated with IBA 4000 ppm exhibited better rooting and sprouting performance as compared to NAA and IAA. Among the three stem cuttings, softwood cutting is an effective explant for faster multiplication.
Key Words: Guava, Stem cutting, Regulators, Rooting, Sprouting and Growth

Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.

Rice – Groundnut (T7) cropping sequence which was on par with Rice – Onion (T6) cropping sequence. The Rice – Maize (T5) cropping sequence recorded the highest total N uptake and Rice – Sunflower (T1) cropping sequence registered higher total P uptake and the total K uptake was higher in Rice – Maize (T5) and Rice – Sunflower (T1) cropping sequences. Grain yield and straw yield were significantly higher under Rice – Maize (T5) and Rice – Groundnut (T7) cropping sequences. Though the Rice – Castor (T4) cropping sequence recorded highest B:C ratio of 2.08, considering the quantity of water consumption, economic yield, soil nutrients and B:C ratio, the best cropping sequence registered in Parambikulam Aliyar command area was Rice – Castor (T4) cropping sequence followed by Rice – Groundnut (T7) and Rice – Maize (T5) cropping sequences.

Key words : Cropping sequence, Nutrient dynamics, Nutrient uptake, Grain and Straw yield.

Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.

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  • Copyright @ 2019 Madras Agricultural Journal | Developed by Crystalpro All right reserved.