Malays. Appl. Biol. (1997) 26(2): 21-27
N, P, K FERTILIZER POT TRIALS OF ACACIA MANGIUM WILLD. SEEDLINGS
BIMAL K. PAUDYAL* and NIK MUHAMAD MAJID
Faculty of Forestry, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
ABSTRACT
Acacia mangium Willd. is a fast-growing tree species planted widely in Peninsular Malaysia. A glasshouse experiment was conducted to assess the growth response of A. mangium seedlings to N, P, K fertilizers. Nitrogen (urea) and phosphorus (P; O5 ) were applied at four levels and potassium (K, O) at two levels. The levels of treatments for nitrogen and phosphorus fertilizers were 100, 350, 600 and 800 kg/ha and 100 and 200 kg/ha for potassium fertilizer. The study was conducted in a glasshouse for a period of 5 months. The results demonstrated that application of nitrogen (urea) and phosphorus (P, O5 ) at 800 kg/ha and potassium (K, O) at 100 kg/ha is necessary for enhancing optimum growth of A. mangium seedlings on Serdang soil series.
ABSTRAK
Acacia mangium Willd. adalah satu spesies pokok hutan cepat membesar yang ditanam secara meluas di Malaysia. Satu sxperimen telah dijalankan di rumahkaca untuk menilai tumbesaran tumbuhan A. mangium dengan menabur baja N, P, K. Nitrogen (urea) dan fosforus (P, O5 ) telah ditabur dalam empat bahagian dan kalium (K, O) dalam dua bahagian. Bahagian perlakuan untuk baja nitrogen dan fosforus adalah 100, 350, 600 dan 800 kg/ha dan 100 dan 200 kg/ha untuk baja kalium. Kajian telah dijalankan di rumahkaca selama 5 bulan. Keputusan menunjukkan bahawa baja nitrogen (urea) dan fosforus [P, Os ) sebanyak 800 kg/ha dan kalium (K, O) sebanyak 100 kg/ha perlu untuk memperbesarkan tumbuhan A. mangium dalam kuantiti yang optimum di dalam tanah siri Serdang.
Key words: Acacia mangium, fertilizers, nutrition
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