ABSTRAK Proses pembibitan mangrove saat ini sulit dilakukan karena bibit mangrove mempunyai besaran tertentu untuk tumbuh, salah satu faktor yang mempengaruhi yaitu substrat dan kemampuannya bertahan terhadap pasang surut air laut. Hal tersebut perlu adanya penelitian tentang pertumbuhan bibit mangrove terhadap lokasi yang berbeda, sehingga tujuan dari penelitian ini adalah untuk mengetahui perbedaan pertumbuhan diameter dan tinggi serta panjang akar bibit mangrove (Rhizhopora apiculata) pada lokasi yang berbeda. Penelitian dilakukan dalam beberapa tahapan yaitu penentuan lokasi penanaman, persiapan alat dan bahan, seleksi bibit, pengisian substrat, penanaman bibit, pengukuran diameter dan tinggi bibit, dan pengukuran akar. Hasil penelitian menunjukkan bahwa pertumbuhan bibit mangrove Rizophora apiculata di Kecamatan Bangkalan dan Kwanyar mengalami peningkatan yang berbeda setiap harinya, dengan masing-masing nilai diameter sebesar 11 – 14 mm dan 12 – 14 mm, tinggi bibit sebesar 23 – 33 cm dan 18 – 25 cm, serta panjang akar sebesar 8,03 dan 8,00 cm. Akan tetapi pada hasil uji-t pada dua lokasi yang berbeda tidak ada perbedaan yang nyata. Kata kunci : Rhizhopora apiculata, Bibit mangrove, Pertumbuhan mangove

ABSTRACT The process of mangrove nursery is currently difficult because of mangrove seedlings have a certain scale to grow, one of the factors that affect the substrate and its ability to withstand the tide. It is necessary to research on the growth of mangrove seedlings to a different location, so the purpose of this study was to determine differences in height and diameter growth and root length of mangrove seedlings (Rhizhopora apiculata) at different locations. The study was conducted in several stages of the determination of the location of planting, preparation tools and materials, seed selection, charging the substrate, planting seedlings, seedling diameter and height measurements, and measurement of the root. The results showed that the growth of mangrove seedlings Rizophora apiculata in District Bangkalan and Kwanyar increased on a daily basis, with each value of a diameter of 11-14 mm and 12-14 mm, height of seedlings of 23-33 cm and 18-25 cm , as well as root length of 8.03 and 8.00 cm. However, the t-test results at two different locations there is no real difference. Keywords: Rhizhopora apiculata, mangrove seedlings, Growth mangove

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