Diketahui bibit propagul memiliki tinggi sekitar 70-80 cm apabila ditanam di pembibitan akan mudah tercabut karena faktor gelombang dan arus. Maka penulis tertarik untuk melakukan metode penelitian dengan memotong propagul jenis mangrove Rhizophora mucronata dengan porsi berbeda-beda. Agar bibit propagul tersebut tidak mudah tecabut karena faktor arus dan gelombang. Penelitian ini bertujuan untuk mengetahui pengaruh pemotongan propagul terhadap pertumbuhan bibit mangrove jenis Rizophora mucranata dengan porsi berbeda-beda di pembibitan mangrove Fakultas Perikanan dan Ilmu Kelautan Universitas Borneo Tarakan. Penelitian ini dilaksanakan selama 3 bulan dimulai dari bulan November-Januari Tahun 2014-2015. Dari hasil penelitian di ketahui perlakuan pemotongan bibit jenis mangrove Rhizophora Mucronata yang berbeda secara deskriptif memberikan pengaruh terhadap pertumbuhan bibit jenis Rhizophora mucronata. Pemotongan bibit mangrove (bakau) berpengaruh terhadap pertumbuhannya dimana semakin rendah porsi pemotongan dari bibit mangrove Rhizophora mucronata semakin tinggi tingkat kehidupan bibit mangrove.
Kata kunci: Pemotongan, Pertumbuhan, dan Bibit Mangrove

Known seed propagules have about 70-80 cm tall when planted in the nursery will be easily uprooted due to waves and currents. The authors are interested in doing research methods with cutting mangrove species Rhizophora mucronata propagules with different portions. The seed propagules uprooted is not easy because of the currents and waves. This study aimed to determine the effect on the growth of seedlings cutting mangrove propagules Rhizophora mucranata types with different portions in the mangrove nursery Faculty of Fisheries and Marine Sciences University of Borneo Tarakan. This research was carried out for 3 months starting from the month of November to January of 2014 to 2015. The results of research in the treatment known cutting mangrove species of Rhizophora mucronata seedlings of different descriptive influence on seedling growth of Rhizophora mucronata cutting of mangrove seedlings (mangrove) effect on growth in which the lower portion of the cutting of mangrove Rhizophora mucronata seedling higher the level of life of mangrove seedlings. Keywords: Cutting, Growth, and Mangrove Seed