Abstract
A study on the morphological variation of tali bamboo [Gigantochloa apus (Schult.f.) Kurz] has been conducted at various altitudes of Sub Watershed Pelus Banyumas, Central Java. This study was aimed at determining the morphological variations in relation to altitudes above sea levels. The method used was survey with stratified sampling. The variables measured included culm diameter, culm internode length, culm sheath length and width, ovate-triangular blade length and width, leaf blade length and width, stem color and hairs, and altitude. The results of this study indicated that the altitudinal difference effect some morphological characteristics of tali bamboos such as: 1) green young seedling with black hairs found at 200-299 m and 300-399 m asl. 2) morphological variations are effected by altitude. Tali bamboo grows optimally at the altitude of 400 to 499 m asl. The results of regression analysis showed that the altitude has a relatively close correlation with somes of morphological character of tali bamboo.
Highlights
Penelitian tentang variasi morfologis bambu tali[Gigantochloa apus (Schult.f.) Kurz] telah dilakukan pada ketinggian yang bervariasi dari daerah aliran sungai pelus Banyumas Jawa Tengah
The results of this study indicated that the altitudinal difference effect some morphological characteristics of tali bamboos such as: 1) green young seedling with black hairs found at 200-299 m and 300-399 m asl. 2) morphological variations are effected by altitude
Surabaya: Laboratorium Fisiologi Tumbuhan Jurusan Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam Uiversitas Negeri Surabaya
Summary
Ketebalan dinding buluh bambu tali pada penelitian ini berkisar antara 1,5-2,4 cm. Ketebalan dinding buluh pada penelitian ini berukuran lebih besar dibandingkan dengan hasil penelitian Priyambodo (2010). Menurut Priyambodo (2010) ketebalan dinding buluh bambu tali pada lokasi penelitian dengan ketinggian 64 m dpl berkisar antara 0,4-0,6 cm. Hasil analisis varians dengan nilai signifikansi (p) sebesar 0,55 (p>0,05) menunjukkan bahwa ketinggian tempat tidak berpengaruh signifikan terhadap ketebalan dinding buluh (Tabel 3). Hal tersebut diduga karena adanya perbedaan kerapatan tanaman pada setiap lokasi penelitian. Dugaan ini didasarkan atas pernyataan Gardner et al (1991) bahwa kerapatan tanaman merupakan faktor yang mempengaruhi pertumbuhan karena penyerapan energi matahari oleh permukaan daun sangat menentukan pertumbuhan tanaman. Jika kondisi tanaman terlalu rapat sehingga cahaya tidak dapat mengenai sebagian besar tubuh tanaman dapat menekan perkembangan vegetatif akibat laju fotosintesis yang rendah
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