IDENTIFIKASI GULMA PADA TANAMAN AREN (Arenga pinnata Merr) DI NAGARI SUNGAI DAREH, KECAMATAN PULAU PUNJUNG, KABUPATEN DHARMASRAYA

Nengsih, Putri (2025) IDENTIFIKASI GULMA PADA TANAMAN AREN (Arenga pinnata Merr) DI NAGARI SUNGAI DAREH, KECAMATAN PULAU PUNJUNG, KABUPATEN DHARMASRAYA. S1 thesis, universitas Andalas.

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Abstract

Vegetasi tumbuhan liar dengan tingkat kelerengan lahan yang berbeda merupakan salah satu faktor yang perlu diperhatikan pada budidaya tanaman aren. Penelitian ini bertujuan untuk mengetahui keanekaragaman vegetasi tumbuhan liar serta peranannya terhadap tanaman aren. Penelitian dilaksanakan dengan metode kuadrat berukuran 2×2 meter dengan penempatan plot secara purposive random sampling pada tiga tingkat kelerengan: datar (0-8%), agak curam (15-25%), dan curam (25-40%). Parameter yang diamati meliputi jenis, jumlah individu, kerapatan frekuensi, dominansi, indeks nilai penting (INP), summed dominance ratio (SDR), indeks keanekaragaman Shannon-Wiener, serta faktor lingkungan (suhu, intensitas cahaya, dan kelembapan). Perbedaan keanekaragaman gulma dipengaruhi oleh variasi faktor lingkungan pada tiap kelerengan, di mana lahan datar cenderung memiliki kelembapan dan ketersediaan unsur hara yang lebih baik, serta intensitas cahaya lebih tinggi dibandingkan lahan curam. Hasil penelitian ini diharapkan menjadi acuan dalam pengelolaan gulma yang efektif sesuai kondisi kelerengan lahan tanaman aren. Kata kunci: Kuadrat, Indeks Nilai Penting, Summed Dominance Ratio, Faktor lingkungan, Kelerengan Wild vegetation on different slopes is a crucial factor in sugar palm cultivation. This study aimed to determine the diversity of wild vegetation and its role in sugar palm cultivation. The study was conducted using a 2x2 meter quadrat, with plots placed using purposive random sampling on three slopes: flat (0-8%), moderately steep (15-25%), and steep (25-40%). Observed parameters included species, number of individuals, density, frequency, dominance, importance value index (IVI), summed dominance ratio (SDR), Shannon-Wiener diversity index, and environmental factors (temperature, light intensity, and humidity). Differences in weed diversity are influenced by variations in environmental factors on each slope, with flat land tending to have better moisture and nutrient availability, as well as higher light intensity than steep land. The results of this study are expected to serve as a reference for effective weed management based on the slope conditions of sugar palm plantations. Keywords: Quadrat, Importance Value Index, Summed Dominance Ratio, Environmental Factors, Slope

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