Pertumbuhan dan Hasil Jagung yang Dipupuk N, P, dan K pada Tanah Vertisol Isimu Utara Kabupaten Gorontalo

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.

Combination of recommended macro fertilizers and solid organic fertilizers for sweet corn on medium land in Inceptisol soil types

“…The standard fertilizer is the recommended dose of sweetcorn seed used consist of inorganic fertilizer (NPK and urea) and organic fertilizer is 2.000 kg per hectare of corn plants, on land with low fertility or organic content <2%. [6]. The following types of treatment are shown in Table 1.…”

Pengaruh Pupuk Kandang Ayam Terhadap Pertumbuhan Vegetatif Tanaman Jagung (Zea mays L.)

“…Pemupukan merupakan kegiatan yang erat kaitannya dengan pertumbuhan dan produksi tanaman. Semakin sulit bagi petani untuk memberikan pupuk hara N, P dan K yang lebih peka terhadap tanaman, sehingga diperlukan informasi ketersediaan unsur hara dalam tanah untuk mengetahui unsur hara yang kurang di dalam tanah (Nurdin et al , 2008).…”

Pertumbuhan dan produksi jagung pulut lokal Gorontalo, efektivitas agronomi, dan ekonomi dengan pemberian pupuk organik di Bualo, Kabupaten Boalemo

“…Tampaknya, keragaan umur berbunga jantan jagung pulut cenderung fluktuatif dengan dosis pupuk organik dan tidak menunjukkan pola yang konstan atau cenderung turun naik. Padahal menurut Nurdin et al (2009), pembungaan jagung dapat dipercepat 3-10 hari dengan pemberian pupuk. Namun pada penelitian ini, justru pemberian pupuk organik belum menunjukkan percepatan pembungaan jagung tersebut, dikarenakan faktor genetik dan kondisi lingkungan (suhu) yang mempengaruhi percepatan waktu berbunga.…”