MELDA YANTI, 1114151045 (2015) PENGARUH ZAT ALELOPATI DARI ALANG-ALANG TERHADAP PERTUMBUHAN SEMAI TIGA SPESIES AKASIA. FAKULTAS PERTANIAN, UNIVERSITAS LAMPUNG.
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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)
Senyawa alelopati merupakan senyawa kimia yang dilepaskan tumbuhan (seperti: alang-alang) ke lingkungan tempat tumbuh dan dapat menghambat atau mematikan tumbuhan lainnya. Penelitian bertujuan mengetahui pengaruh zat alelopati dari alang-alang terhadap pertumbuhan semai spesies akasia, mengetahui jenis semai yang terpengaruh paling lemah, serta mengetahui interaksi antara konsentrasi ekstrak alang-alang dengan jenis pohon fase semai. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan pola faktorial. Faktor I yaitu jenis semai yang terdiri atas akasia, mangium, dan akasia putih, sedangkan faktor II yaitu konsentrasi ekstrak alelopati alang-alang yang terdiri atas tanpa pemberian ekstrak alelopati, pemberian ekstrak alelopati 25%, pemberian ekstrak alelopati 50%, pemberian ekstrak alelopati 75%, dan pemberian ekstrak alelopati 100%. Setiap perlakuan diulang 5 kali. Jumlah semai pada setiap satuan percobaan adalah 2 semai. Variabel yang diamati adalah tinggi, diameter batang, jumlah daun, dan persentase hidup semai. Data diuji menggunakan uji Bartlett untuk mengetahui homogenitas ragam. Kemudian dianalisis dengan analisis ragam, lalu diuji lanjut dengan uji beda nyata terkecil. Taraf nyata yang digunakan dalam semua pengujian tersebut adalah 5%. Hasil penelitian menunjukkan bahwa zat alelopati alang-alang berpengaruh terhadap pertumbuhan semai akasia, mangium, dan akasia putih. Berdasarkan uji BNT pada taraf nyata 5% diketahui bahwa konsentrasi alelopati alang-alang yang berpengaruh negatif paling kuat terhadap pertumbuhan semai adalah konsentrasi 100%. Jenis pohon fase semai yang paling tahan terhadap alelopati dari alangalang adalah semai mangium. Dari uji analisis ragam diketahui terdapat interaksi antara jenis pohon fase semai dengan konsentrasi zat alelopati alang-alang yang memengaruhi pertumbuhan tinggi, jumlah daun, dan persentase hidup semai. Kata kunci : alelopati, alang-alang, dan akasia Abstrak Bahasa Inggris Allelopathy is the compound released by the plants (example: blady grass) to the environtment and where another plants is living and could obstruct or extinguish to another plants. The purpose of research were to figure out the effect of allelopathy from the blady grass toward the species of acacia seedlings, to figure out the weakest affected seedling species by blady grass allelopathy, and to figure out interaction between concentration of extracted blady grass and seedling tree species. The research was designed based on factorial in a complete random design. Factor I was the seedlings, consisted of acacia, mangium, and acacia alba, while factor II was concentration of extracted blady grass allelopathy, consisted of non extracted allelopathy, extracted allelopathy 25%, extracted allelopathy 50%, extracted allelopathy 75%, and extracted allelopathy 100%. Every treatment was repeated 5 times. The number of the seedlings for each experimental unit was 2 seedings. The observed variables were height, diameter of the stem, number of leaves, and living percentage of the seedlings. This observation data was tested by Bartlett test to find the variance homogenity. Then it was analyzed by using variance analysis, and tested by least significant difference (LSD). The calculation were done at 5% significant level. The result of this research showed that allelopathy of blady grass were significant to the growth of acacia, mangium and acacia alba seedlings. Based on the LSD at 5% was known that the concentrate of blady grass allelopathy had strongest negative effect to the growth seedlings was 100%. Seedling that was the most resistant to the allelopathy of blady grass is mangium seedling. It was known from the analysis of variance test there was an interaction between the seedling and the concentration of blady grass allelopathy that effect the height, leaves number, living percentage of seedlings. Key words : allelopathy, baldy grass, and acacia
| Jenis Karya Akhir: | Skripsi |
|---|---|
| Subyek: | > Kehutanan |
| Program Studi: | Fakultas Pertanian dan Pascasarjana > Prodi Kehutanan |
| Pengguna Deposit: | 6485891 . Digilib |
| Date Deposited: | 16 Dec 2015 03:32 |
| Terakhir diubah: | 16 Dec 2015 03:32 |
| URI: | http://digilib.unila.ac.id/id/eprint/15717 |
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