Electronic Theses and Dissertation

Abstrak. tomat (solanum lycopersicum l.) merupakan salah satu famili solanaceae yang tergolong tanaman semusim. buah tomat saat ini merupakan salah satu komoditi hortikultura yang bernilai ekonomi tinggi dan masih memerlukan penanganan serius, terutama dalam hal peningkatan hasil dan kualitas buahnya. tujuan dari penelitian ini adalah untuk mengetahui pengaruh dosis asam humat dan pupuk sp-36 serta interaksi antara dosis asam humat dan pupuk sp-36 terhadap pertumbuhan dan hasil tanaman tomat. penelitian ini dilaksanakan di kebun percobaan ii dengan koordinat (5º32'09''lu 95º22'15''bt) pada ketinggian 4 mdpl dan laboratorium hortikultura fakultas pertanian universitas syiah kuala yang berlangsung dari januari hingga mei 2025. rancangan penelitian yang digunakan adalah rancangan acak kelompok pola faktorial 3x4 dengan 3 ulangan. faktor pertama adalah dosis asam humat yang terdiri dari 3 taraf yaitu 0 g, 1 g dan 1,5 g tanaman-1 dan faktor kedua adalah 4 dosis pupuk sp-36 yaitu 0 g, 6 g, 7,5 g, dan 9 g tanaman-1. hasil penelitian menunjukkan bahwa perlakuan dosis asam humat berpengaruh sangat nyata terhadap jumlah buah per tanaman namun berpengaruh tidak nyata terhadap tinggi tanaman dan diameter batang tanaman umur 2,3 dan 4 mspt, bobot buah per tanaman, diameter buah pada 9 mspt, bobot berangkasan basah dan bobot berangkasan kering tanaman. pertumbuhan dan hasil terbaik dijumpai pada dosis asam humat 1 g tanaman-1. perlakuan dosis pupuk sp-36 berpengaruh nyata terhadap jumlah buah per tanaman dan bobot buah per tanaman, namun berpengaruh tidak nyata terhadap tinggi tanaman dan diameter batang tanaman umur 2,3 dan 4 mspt, diameter buah umur 9 dan 12 mspt, bobot berangkasan basah dan bobot berangkasan kering tanaman. pertumbuhan dan hasil terbaik dijumpai pada dosis pupuk sp-36 9 g tanaman-1. interaksi antara dosis asam humat dan dosis pupuk sp-36 berpengaruh sangat nyata terhadap tinggi tanaman umur 4 mspt dan diameter buah umur 12 mspt, berpengaruh nyata terhadap diameter batang umur 4 mspt. pertumbuhan dan hasil tanaman tomat terbaik terdapat pada kombinasi dosis asam humat 1 g dan pupuk sp-36 7,5 g tanaman-1. kata kunci : faktor, taraf, interaksi, parameter

Abstract: Tomato (Solanum lycopersicum L.) one of the Solanaceae family that is classified as an annual plant. Tomatoes are currently one of the horticultural commodities with high economic value and still need for serious handling, especially to increas the yield and quality of the fruit. The purpose of this study is to determine the effect of humic acid and SP-36 fertilizer doses and the interaction between humic acid and SP-36 fertilizer doses on the growth and yield of tomato. This research was conducted at Experimental Garden II with coordinates (5º32'09''N 95º22'15''E) at an altitude of 4 meters above sea level and in the Horticulture Laboratory Faculty of Agriculture, Syiah Kuala University which took place from January to May 2025. The research design used was a 3x4 factorial Randomized Block Design with 3 replications. The first factor is the dose of humic acid consisting of 3 levels (0 g, 1 g and 1.5 g plant-1) and the second factor is 4 doses of SP-36 fertilizer (0 g, 6 g, 7.5 g, and 9 g plant-1). The research showed that the treatment of humic acid doses had a very significant effect on the number of fruits per plant but did not have a significant effect on height and stem diameter of plants aged 2, 3 and 4 Weeks After Planting (WAP), fruit weight per plant, fruit diameter at 9 WAP, wet bunch weight and dry bunch weight of plants. The best growth and results were found at a dose of humic acid of 1 g plant-1. The treatment of SP-36 fertilizer doses had a significant effect on the number of fruits per plant and fruit weight per plant, but did not have a significant effect on plant height and diameter of stem plants at aged 2, 3 and 4 WAP, fruit diameter at 9 and 12 WAP, wet bunch weight and dry bunch weight of plants. The best growth and results were found at a dose of SP-36 fertilizer of 9 g plant-1. The interaction between the dose of humic acid and the dose of SP-36 fertilizer had a very significant effect on plant height at 4 WAP and fruit diameter at 12 WAP, and had a significant effect on diameter stem of plant at 4 WAP. The best growth and yield of tomato plants were found in the combination of 1 g of humic acid and 7.5 g of SP-36 fertilizer plant-1. Keywords: Horticulture, annuals, acid soils