Pengaruh Jarak Tanam Terhadap Pertumbuhan Jati Plus Perhutani Umur 3 Tahun di KPH Ngawi
DOI:
https://doi.org/10.22219/avicennia.v7i1.36067Keywords:
jati plus perhutani, jarak tanam, riapAbstract
Pertumbuhan pohon dipengaruhi oleh beberapa faktor salah satunya jarak tanam. Jarak tanam mampu memberikan ruang tumbuh untuk proses perkembangannya yang berpengaruh pada kemampuan menyerap unsur hara dan memperoleh cahaya matahari. Tujuan penelitian ini untuk mengetahui pengaruh jarak tanam terhadap pertumbuhan klon Jati Plus Perhutani. Penelitian dilakukan di Resort Pengelolaan Hutan Kricak, Kesatuan Pengelolaan Hutan Ngawi, pada tanaman Jati Plus Perhutani berumur 3 tahun. Metode penelitian menggunakan rancangan acak kelompok. Perlakuan jarak tanam yang diuji yaitu 3x3m, 6x6m, 8x4m, dan 8x6m dengan pengulangan sebanyak lima kali. Indikator penelitian diantaranya diameter pohon, tinggi total, diameter tajuk serta dilakukan perhitungan riap diameter pohon. Hasil menunjukkan bahwa jarak tanam berpengaruh signifikan terhadap diameter pohon, tinggi total, diameter tajuk dan riap pertumbuhan diameter. Diameter pohon terbaik pada jarak tanam 8x6m sebesar17,96 cm. Diameter tajuk terbaik pada jarak 8x6 m yakni sebesar 4,94 m. Sementara itu jarak tanam 8x4 menghasilkan perlakuan tertinggi berdasarkan tinggi total pohon sebesar 12,29 m. Terjadi fluktuasi pada pertumbuhan Mean Annual Increment (MAI) namun terjadi peningkatan pertumbuhan pada Current Annual Increment (CAI). Pertumbuhan riap diameter pohon paling optimal terjadi pada perlakuan jarak 8x6m baik itu berdasarkan MAI sebesar 4,96 cm/tahun maupun CAI sebesar 5,38 cm/tahun. Hasil ini menunjukkan bahwa jarak tanam berperan penting dalam meningkatkan pertmbuhan jati plus perhutani secara optimal.
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