ABSTRAK Selada (Lactuca sativa L.) merupakan salah satu tanaman sayuran yang memiliki nilai ekonomis dan gizi tinggi. Pemberian pupuk organik menjadi alternatif dalam budidaya dengan menggunakan pupuk struvite. Penelitian ini bertujuan untuk mengetahui pengaruh waktu aplikasi dan macam pupuk organik yang berbeda terhadap pertumbuhan dan hasil tanaman selada. Penelitian ini dilaksanakan didalam rumah plastik didesa Jangkar Kecamatan Tanah Merah Bangkalan Madura. Penelitian ini dilakukan pada bulan Maret-Mei 2014. Terdapat 6 perlakuan, 9 ulangan. Perlakuandisusunolehwaktuaplikasi (satuminggusebelumtanamdansaattanam) danmacampupukstruvite (struvite+pupukkandang ayam, struvite+pupukkandang sapi, dan struvite+pupukkandangitik dengan dosis 20 ton/Ha) yang terdiri dari S1: aplikasi 1 minggu sebelum tanam dengan struvite+pupukkandangayam, S2: aplikasi 1 minggu sebelum tanam dengan struvite+pupukkandangsapi, S3: aplikasi satu minggu sebelum tanam dengan struvite+pupukkandangitik, S4: aplikasi saat tanam dengan struvite+pupukkandangayam, S5: aplikasi saat tanam dengan struvite+pupukkandangsapi, dan S6: aplikasi saat tanam dengan struvite+pupukkandang itik. Hasil percobaan menunjukkan persentase tanaman hidup sebesar 67-89% dan tanaman mati sebesar 11-33 %. Perlakuan terbaik terdapat pada struvite+pupukkandang sapi (S2) pada berbagai umur pengamatan disetiap variabel pengamatan. Hal ini ditunjukkan dengan hasil rata-rata tertinggi pada bobot basah (46.35 g ) dan bobot konsumsi (40.75 g) pada umur 7 MST. Kata kunci:Selada danpupuk struvite

ABSTRACT Lettuce (Lactuca sativa L.) is kind of vegetable crop that has high economic value and high nutrition. The allocation fertilizer is one alternative cultivation using struvite fertilizer. The purpose of this research was to determine the effect of application time and kind of fertilizer on growth and yield of lettuce crops. The research was carried out in plastic house in Jangkar village Tanah Merah district Bangkalan Madura. The research was conducted in March to May 2014. There are six treatment, nine replication. The treatment is composedby time application (one week before planting and at planting) and kind of fertilizer (struvite+chicken manure,struvite+cow manure, and struvite+duck manure at a dose of 20 tons/ha) which includes S1: one week before planting with struvite+ chicken manure, S2: one week before planting with struvite+duck manure, S3: one week before planting withstruvite+duck manure, S4: at planting with struvite+chicken manure, S5: at planting withstruvite+cow manure, and S6: at planting withstruvite+duck manure. The result showed apercentages of life plant is 78 % and percentages of died plant is 33% between a time application and kind of fertilizer to variable length of plant at age 7 MST. This is indicated by the average of higest results on the wet weight (46.35 g), consumption weight (40.75 g) total plant lettuce at age 7 MST. Keyword: lettuce and struvite fertilizer

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