储存技术CEMPAKA WASIAN (Magnolia tsiampaca)使用生长抑制剂和媒体种植方式

A. Irawan, Jefred E Halawane, Hanif Nurul Hidayah
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TEKNIK PENYIMPANAN SEMAI CEMPAKA WASIAN (Magnolia tsiampaca (Miq.) Dandy) MENGGUNAKAN ZAT PENGHAMBAT TUMBUH DAN PERLAKUAN MEDIA TANAM
ABSTRACT Cempaka wasian ( Magnolia tsiampaca (Miq) Dandy) is a forest tree species that has recalcitrant seed character. Recalcitrant seeds are difficult to be stored for a long period, thus storing the seedlings can be considered as an option. This research aims to determine the effect of growth inhibitors and planting media on seedling growth during storage. The inhibitors used were paclobutrazol 250 ppm, NaCl 0,5% and aquadest (as control treatment). The media used consisted of top soil+cocopeat (1:1), top soil+sand(1:1) and top soil+husk charcoal (1:1). The research design used was a complete randomized factorial pattern design. The results showed that the inhibitors had a significant effect on the growth os seedling height. Provision of 250 ppm paclobutrazol was able to inhibit the growth of seedling height. Planting media also had a significant effect on the growth of height and diameter of the seedlings, also on seed quality index of cempaka wasian. The soil+cocopeat and soil+sand planting media are effective to reduce the growth rate in both height and diameter of cempaka wasian seedlings during storage. Key words: Cempaka, growth inhibitors, planting media, seedling ABSTRAK Cempaka wasian ( Magnolia tsiampaca (Miq) Dandy) adalah salah satu jenis pohon hutan yang memiliki karakter benih rekalsitran yang sulit disimpan dalam jangka waktu lama, sehingga perlu dilakukan penyimpanan dalam bentuk semai dengan menggunakan bahan semai. Tujuan penelitian ini adalah untuk mengetahui pengaruh bahan penghambat pertumbuhan dan media tanam terhadap pertumbuhan semai cempaka wasian selama masa penyimpanan. Bahan penghambat pertumbuhan yang digunakan adalah paklobutrazol 250 ppm, NaCl 0,5%, dan akuades sebagai kontrol. Media tanam terdiri dari tanah+ cocopeat (1:1), tanah+pasir (1:1), dan tanah+arang sekam (1:1). Rancangan percobaan yang digunakan adalah rancangan acak lengkap pola faktorial. Hasil penelitian menunjukkan faktor zat penghambat tumbuh memberikan pengaruh yang nyata terhadap pertumbuhan tinggi bibit. Pemberian paklubutrazol 250 ppm mampu menghambat pertumbuhan tinggi bibit. Faktor media tanam memberikan pengaruh nyata terhadap pertumbuhan tinggi, diameter, dan indeks mutu bibit cempaka wasian. Media tanam tanah+sabut kelapa dan tanah+pasir merupakan media yang efektif mengurangi kecepatan pertumbuhan tinggi dan diameter semai cempaka wasian selama penyimpanan. Kata kunci: Cempaka, bahan penghambat pertumbuhan, media tanam, semai
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