IRADIASI SINAR GAMMA ( Co) UNTUK MENINGKATKAN PERKECAMBAHAN 60 DAN PERTUMBUHAN BIBIT TEMBESU ( Roxb.)Fagraea fragran

Muhammad Zanzibar, Megawati Megawati, Endang Pujiastuti, Dede J. Sudrajat

Sari


Iradiasi sinar gamma dengan dosis rendah telah banyak digunakan untuk memperbaiki perkecambahan benih dan pertumbuhan bibit untuk banyak tanaman pertanian, namun teknik ini masih terbatas untuk diaplikasikan pada jenis- jenis tanaman hutan. Tujuan penelitian ini adalah untuk (1) mempelajari pengaruh iradiasi benih dan periode simpan terhadap perkecambahan benih tembesu, serta (2) mengetahui pengaruh iradiasi benih segar terhadap pertumbuhan bibit tembesu. Percobaan pertama menggunakan Rancangan Faktorial dalam Rancangan Acak Lengkap dengan 2 faktor, yaitu faktor iradiasi dan faktor periode simpan. Percobaan kedua menggunakan rancangan acak lengkap dengan perlakuan dosis iradiasi. Hasil penelitian menunjukkan bahwa untuk meningkatkan daya simpan, benih segar dapat diradiasi dengan dosis maksimal 120 Gy. Hasil iradiasi terhadap pertumbuhan tinggi dan diameter bibit jenis tembesu dicapai pada dosis 30 Gy, dimana perlakuan ini dapat meningkatkan pertumbuhan tinggi sebesar

205,84% dan diameter sebesar 133,33%. Iradiasi sinar gamma 30 Gy dapat meningkatkan kualitas bibit jenis tembesu.


Kata Kunci


Benih tembesu; iradiasi; penyimpanan; perkecambahan; pertumbuhan

Teks Lengkap:

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Referensi


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DOI: http://dx.doi.org/10.9868/jpht.v12i3.1016

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