Pengaruh Dosis Pupuk Majemuk NPK + Zn terhadap Pertumbuhan, Produksi, dan Serapan Zn Padi Sawah di Inceptisol, Kebumen

Latifah Arifiyatun, Azwar Maas, Sri Nuryani Hidayah Utami
2016 Planta Tropika Journal of Agro Science  
ABSTRAK Penelitian ini bertujuan untuk mengetahui formula Zn optimum yang dapat ditambahkan pada pupuk NPK dosis 300 kg/ha dan tambahan Urea 200 kg/ ha, pupuk organik 500 kg/ha, pengaruhnya terhadap serapan hara Zn serta produksi padi. Budidaya padi umumnya diberikan pupuk makro sintetis tanpa pengembalian residu tanaman dan bahan organik sebagai pembenah tanah sekaligus penyedia hara mikro. Selain itu, akumulasi P dalam tanah menekan ketersediaan Zn, pada pH netral hingga alkalis Zn tidak
more » ... kalis Zn tidak tersedia dan relatif mobile, saat tanah tergenang Zn mengendap, dan tidak pernah dipupuk hara mikro Zn. Lahan intensif untuk pembuatan batubata, genting, terindikasi mengalami pengurasan Zn yang nampak gejala daun tanaman padi berkurang ketegarannya, berwarna hijau pucat 2-4 hari setelah digenangi kemudian krotik dan mengering. Penelitian inovasi pupuk mikro dilakukan pada bulan Juli 2014 hingga Januari 2015, di rumah kaca Fakultas Pertanian, Universitas Gadjah Mada dengan menggunakan media tanah InseptisolKebumen, sebanyak 10 perlakuan. dosis NPK Plus Zn dengan rentang kadar Zn 0,25% dari 0% hingga 2% Zn diulang sebanyak 3 kali menggunakan Rancangan Acak Lengkap (RAL). Hasil penelitian menunjukkan bahwa tanah yang diberikan tambahan 1,75% Zn memiliki kandungan Zn tersedia tertinggi yaitu 0,16 mg/kg dengan kandungan Zn jaringan trubus sebesar 68,38 mg/kg, sedangkan pada perlakuan kontrol mempunyai nilai terendah yaitu 0,07 mg/kg dengan kandungan Zn jaringan trubus sebesar 47,85 mg/kg. Tidak terlihat peningkatan hasil disebabkan oleh pemberian tambahan Zn sampai takaran 2% dari pupuk NPK plus Zn yang diberikan, tetapi kecenderungan takaran 1,75% Zn memberikan hasil produksi tertinggi dengan ektrapolasi yang cukup ke total populasi mencapai 9,96 ton/ha sedangkan pada kontrol 3,45 ton/ha. ABSTRACT The study was conducted to identify the optimum Zn formula that could be added to dose 300 kg/ha NPK fertilizer with the additional 200 kg/ha urea, organic fertilizer 500 kg/ha and its implication on Zn nutrient uptake and paddy production. Generally, paddy cultivation practices applied macro-synthetic fertilizers without returning crop residues and organic materials as a soil conditioner as well as to provide micronutrients. In addition, the accumulation of P in the soil is pressing the availability of Zn, at neutral pH to alkaline Zn is not available and relatively mobile, when the soil is waterlogged Zn would be settled, and usually Zn is never be fertilized. Moreover, the land is intensively used for the manufacture of bricks and tiles indicate experiencing Zn depletion will cause symptoms on leaves of rice plants reduced toughness, pale green after 2-4 days later on flooded would be krotik and dried up. The research of fertilization innovation on micronutrients were conducted on July 2014 -January 2015 in Green House Agriculture Faculty, the University of Gajah Mada where the planting media of this research was Inceptisol which taken from Kebumen. The treatment were 10 treatments with a dose of NPK Plus Zn 0.25% Zn content ranges from 0% to 2% Zn repeated 3 times using a complete randomized design (CRD). The results showed that the land was given an additional 1.75% Zn has provided the highest Zn content of 0.16 mg/kg with a content of Trubus tissue's Zn 68,38 mg/kg. Whereas in the control treatment had the lowest score is 0.07 mg/kg with Zn content of trubus tissue was 47.85 mg/kg. Not seen an increase in yield due to the additional provision of 2% Zn to the dose of NPK fertilizer plus Zn were given, but the tendency dose of 1.75% Zn gives the highest production yield with and extrapolated enough to the total population reached 9.96 tons/ha while in control was only 3.45 tons/ha.
doi:10.18196/pt.2016.062.101-106 fatcat:3jk576qfajcc3ghhgxe7cdacxm