World Journal of
Pharmaceutical and Life Sciences

THE EFFECT OF WATER SUPPLY ON LEAVES CONTENT OF N, P, AND K OF SOME COFFEE VARIETIES

Sri Hafnida Ritonga, Muhammad Rafiq Anas, Nurhayati, Murni Sari Rahayu, Yenni Asbur* and Yayuk Purwaningrum

ABSTRACT

The Water is important for nutrient uptake mechanisms, namely root interception, diffusion and mass flow. Water is absorbed by plants through the roots together with nutrients dissolved in it, then transported to the top of the plant, especially the leaves through xylem vessels. This research was conducted in the laboratory and greenhouse of the Faculty of Agriculture, Islamic University of North Sumatra, Jalan Karya Wisata, District of Medan Johor, Medan City. The research site laid on ± 25 meters above sea level with a flat topography. This research was conducted from June until completion. The research design is factorial randomized block design (RAK) using 2 factors, namely Variety (V) consisting of 4 levels, namely Robusta coffee BP 936, Gayo Arabica coffee 1, Liberoid Meranti coffee, and Sigararutang Arabica coffee. Watering consists of 4 levels, namely: watering with intervals 1 day twice, once every 2 days, once every 3 days, and once every 4 days. The observed variables were: analysis of the N, P, K content of the leaves. The results showed that the highest N content was found in robusta BP 936, the highest P content was in Gayo 1 arabica, the highest K content was in Gayo arabica 1. An increase in watering intervals for coffee varieties with intervals of 4 days resulted in the highest P and K while the highest N nutrient content was at watering intervals of once every 3 days.

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