Abstract
The fertilizer availability as source of N, P, and K nutrient where plant responsif was difficult found by farmer. Thefore, It was needed information about nutrient availability in soil properties to know nutrient deficiency of its by maize as plant indicator. The objective of this research was to study the respons of N, P, and K fertilizers and the best combination of it on the growth and yield of Maize. The research conducted at Udic Pellusterts in North Isimu Tibawa District of Gorontalo Regency. The experi- mental design was following random block design that consist of 5 treatments with 3 replications. The result of this research showing that minus N, P, and K fertilizers have a significantly effect on plant age polination, the percentage of height stem of an ear of corn to plant height and dry straw weight but did not have significantly effect on plant height and the weigh of one hundred grain of Maize. To improve the growth and yield of Maize using fertilizing without P treatment were 250 kg Urea ha-1 and 75 kg KCl ha-1 or completely dosage were 250 kg Urea ha-1, 100 kg TSP ha-1 and 75 kg KCl ha-1 as the best fertilizers combination.
Highlights
Response of Maize (Zea mays L.) Lamuru FM Variety with Fertilized N, P, and K in North Isimu Vertisols of Gorontalo Regency
difficult found by farmer
The objective of this research was to study the respons of N
Summary
Penelitian ini dilaksanakan sejak bulan Mei sampai Oktober 2006 di Desa Isimu Utara Kecamatan Tibawa Kabupaten Gorontalo. PG Gorontalo-Tolangohula dan analisis data di Laboratorium Fakultas Pertanian Universitas Negeri Gorontalo. Menurut Joseph (2005), famili tanah di lokasi penelitian adalah Udic Pellusterts, sangat halus, smektitik, isohipertermik yang berkembang dari bahan induk tonalit kapur. Mineral liat yang dominan pada tanah ini adalah smektit tanpa kaolinit dengan muatan tergantung pH rendah. Pada tanah berbahan induk tonalit kapur, nilai KTK pada pH 7,08 (KTK jumlah kation) melebihi KTK muatan permanen. Sifat ini terjadi karena pada pH yang lebih tinggi dari 6,5. Tingginya kejenuhan basa (KB) jumlah kation pada tanah berbahan induk tonalit kapur ini karena nilai EA (excangeable acidity) sangat rendah. Penelitian ini dirancang dengan menggunakan Rancangan Acak Kelompok (RAK) yang terdiri atas 5 (lima) perlakuan dan 3 (tiga) ulangan, sehingga memperoleh 15 (lima belas) satuan petak percobaan. Perlakuan dan takaran pupuk untuk penelitian lapangan
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