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Pengaruh Pemupukan Nitrogen di atas Dosis Rekomendasi terhadap Produksi Tanaman Sayuran
dan Pendapatan Petani di Dataran Tinggi Dieng, Kab. Wonosobo

Mas Teddy Sutriadi
Peneliti Badan Litbang Pertanian pada Balai Besar Litbang Sumberdaya Lahan Pertanian,
Jl. Tentara Pelajar 12, Cimanggu Bogor

Abstract. The vegetable crop is annual crop than most be planted in highland agriculture. The farmer applied excessive nitrogen fertilizer and higher than the recommended rates. Consequently, it was waste the money, reduced yield quality, and created environmental risks, such reduce water resources quality. The general goal of this research was to identify supporting factors why the farmers apply high nitrogen fertilizer rate, to know the nitrogen fertilizer rate given by the farmers in the highland vegetables production, and to know the impact of nitrogen fertilizer on vegetable production. The research was carried out in Klakah sub watershed, Serayu watershed, Dieng Highland, Wonosobo district for the Rainy Season 2008-09 and the Dry Season 2009. This research used quantitative approach including descriptive format of Ex Post Facto and analysed used B-C ratio analyisis and correlation analysis bettwen yield and nitrogen fertilizer doses. Seventy five farmers were interviewed. The results show that the rates of nitrogen fertilizer for potato, cabbage, and sweet corn were 312, 167, and 43 kg N ha-1 per season, respectively. The rates of potato and cabbage were higher about 70% and 6% compared to the recommendation rates for potato and cabbage, respectively. The farmers also applied organic fertilizer (chicken manure) higher than the recommended rate about 25% higher than the recommendation rate. The potato yield was considered low, lower than its potential yield (40 t ha-1). This caused the farmers applying more urea rather than adding P and K fertilizers.

Keywords: Nitrogen fertilizer, vegetable production, farmers income

Diterbitkan pada Prosiding Seminar Nasional Pertanian Ramah Lingkungan. Hal. 261-272. Penyunting: Sulaeman et al. Bogor, 29 Mei 2013. Badan Penelitian dan Pengembangan Pertanian, Kementerian Pertanian. 2013

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