Morphophysiological Characteristics of Shallot on Application of Boron and Benzyl Amino Purin

Yaya Hasanah, Diana Hanafiah, Nursa’adah , Hamidah Hanum and Anas Kusriarmin

Background and Objective: Boron is an important micro nutrient that functions for the growth and development of shallot plants. Benzyl amino purine (BAP) is a growth regulator which is classified as a synthetic cytokinin which is most active in influencing plant physiological processes. This research aims to identify the role of boron and BAP on the morphophysiological characteristics of shallots. Materials and Methods: The study was conducted at Screen House, Faculty of Agriculture, Universitas Sumatera Utara, from September to December, 2023. This research was conducted using a factorial randomized block design with 2 factors and 3 replications. The first factor was boron treatment at 0, 2, 4 and 6 kg/ha. The second was the application of benzyl amino purine at 0, 100 and 200 ppm. The observed variables include plant length, number of leaves, chlorophyll a, chlorophyll b and total of chlorophyll. Results: Boron treatment 6 kg/ha tends to increase number of leaves 6 WAP, while application of benzyl amino purin 200 ppm tends to increase plant length 2-4 WAP and number of leaves 3-4 WAP. There was a tendency that the application of 0-200 ppm BAP reduced the chlorophyll a, chlorophyll b and total chlorophyll content of leaves. The interaction between 6 kg/ha boric acid treatment and 200 ppm BAP increased plant height 2-4 WAP and number of leaves 2-4 WAP. Conclusion: The application of 0-200 ppm BAP reduced the chlorophyll a, chlorophyll b and total chlorophyll content of leaves.

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