Hendrawan Hendrawan, Yaya Sonjaya, Ilham Ramadhan Husein, Fitri Khoerunnisa
This research was focused to the study of the effects of two kinds of liquid fertilizers, called bionutrient-S267 and bionutrient-S367 when they were applied to citrus plant. The parameters involved were (1) content level of nitrogen, phosphorus, and potassium in leaves of citrus; (2) growth of leaves; (3) number of flower and fruit; and (4) yield. The research was conducted in a farmland in West Java, Indonesia. Bionutrient-S267 and bionutrient-S367 were applied foliarly, sprayed on the foliage of the citrus leaves. The dose and the quantity of bionutrients had been optimized beforehand. The application of the bionutrients was carried out once a week. In other hand, the control, a commercial fertilizer, was applied as usually farmers did in the region. It was found that the content level of nitrogen in the leaves tend to decrease, while that of phosphorus increased at the beginning of application then achieved maximum value at the third month and after while tend to be constant or slightly decrease for all kind of fertilizers in concern, whereas the potassium level was decreased constantly when bionutrient-S367 was applied. The length and the width of leaves on the twig decreased with the order of decrease starting from the leaf exhibit the base, the middle, and the end part of the twig for all kind of fertilizers in concern. Bionutrient-S367 and bionutrient-S267 provoked flowering earlier compared to the control, and so that for the emergence of the fruit. The diameter and mass of the fruit in the trees treated by bionutrient-S367 was superior to those resulted by both bionutrient-S267 and control. In general, in term of yield, bionutrient-S367 demonstrated its superiority against both bionutrient-S267 and positive control. © School of Engineering, Taylor's University.
Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi no 299, Bandung, 40154, Indonesia
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