MADRAS AGRICULTURAL JOURNAL

Influence of Biostimulants and Plant Growth Regulators onPhysiological and Biochemical Traits in Tomato (Lycopersicon esculentum Mill.)

Abstract

                                Increasing the yield and quality has been one of the major objectives of scientists working in tomato especially through organic based inputs. Among the various approaches, use of biostimulants and Plant Growth Regulators has been promising in terms of increasing yield and quality in the context of organic farming. Biostimulants are organic compounds composed of peptides, amino acids, polysaccharides, seaweeds, humic acids and phytohormones for immediate uptake and availability within the plant. It also stimulates natural processes to enhance nutrient uptake, tolerance to abiotic stress and crop quality. In order to understand the responses of plants to biostimulants and plant growth regulators in terms of physiological and biochemical changes, the pot culture experiment was conducted in tomato with variety PKM 1. Various components of biostimulants viz., seaweed extract, humic acid, phytohormones were applied as foliar spray at appropriate concentrations in completely randomized block design with four replications. Results revealed that the higher chlorophyll content, soluble protein, NRase activity and shoot length were observed in plants treated with 100 ppm salicylic acid followed by 0.2 per cent humic acid and seaweed- 0.5 per cent Kappaphycus alvarezii. These findings suggest that biostimulants and PGRs can be effectively used to influence the physiological and biochemical traits which would results in better growth and yield.

Key words : Tomato, Biostimulants, Seaweeds, Humic acid, Growth regulators

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

depletion of water below the soil surface reduced total water consumption and recorded lower grain yield. Among weed management, EPOE bispyribac sodium @ 25 g a. i. ha-1 (Two to three leaf stages of weeds) fb hand weeding at 35-45 DAS had recorded higher grain yield which was on par with PE pendimethalin 1kg a. i. ha-1 on 3-5 DAS fb EPOE bispyribac sodium @ 25 g a. i. ha-1 (Two to three leaf stages of weeds). But, due to higher labour cost involved in hand weeding, EPOE bispyribac sodium @ 25 g a. i. ha-1 (Two to three leaf stages of weeds) fb hand weeding at 35-45 DAS recorded higher cost of cultivation. Thus, in water and labour scarce situation AWDI at 10 cm depletion of water below the soil surface with PE pendimethalin 1kg a. i. ha-1 on 3-5 DAS fb EPOE bispyribac sodium @ 25 g a. i. ha-1 (Two to three leaf stages of weeds) was the best option to get higher productivity in rice.

Key words : Direct seeded rice, Water use efficiency, Weed management, Yield

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

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    Copyright@2018 The Madras Agricultural Journal | Developed by Crystalpro All right reserved.

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