Kunyit (Curcuma domestica Val.) merupakan salah satu tanaman obat potensial, selain sebagai bahan baku obat juga dipakai sebagai bumbu dapur dan zat pewarna alami. Tujuan dari penelitian ini untuk mengetahui hubungan beberapa sifat kimia tanah terhadap kandungan senyawa kurkumin pada rimpang tanaman kunyit di tiga Kecamatan yang terdapat di Kabupaten Bangkalan dan untuk mengetahui perbedaan kandungan senyawa kurkumin pada rimpang tanaman kunyit di tiga Kecamatan di Kabupaten Bangkalan. Metode yang digunakan yaitu analisis regresi untuk mencari hubungan antara kandungan senyawa kurkumin rimpang kunyit dengan beberapa sifat kimia tanah (Bahan Organik Tanah, Unsur Nitrogen, Unsur Phospor, dan Unsur Kalium) yang ada di Kabupaten Bangkalan. Perbedaan kandungan senyawa kurkumin rimpang kunyit di Tiga Kecamatan di analisis menggunakan analisis komparatif One sample T test. Hasil persamaan regresi yaitu Y = 1,921 – 0,120 (X1) + 2,546 (X2) – 0,017 (X3) – 0,004 (X4). Penelitian menunjukkan bahwa sifat kimia tanah berupa Bahan Organik, Unsur Nitrogen, Unsur Phospor, dan Unsur Kalium berpengaruh sebesar 87% terhadap senyawa kurkumin di Tiga Kecamatan Kabupaten Bangkalan. Secara bersama-sama, beberapa sifat kimia tanah yang berupa Bahan Organik Tanah, Unsur Nitrogen, Unsur Phospor, dan Unsur Kalium memiliki pengaruh atau hubungan yang signifikan terhadap senyawa kurkumin tanaman kunyit di Tiga Kecamatan Kabupaten Bangkalan. Berdasarkan tabel One-Sample Test, nilai t hitung pada Kecamatan Bangkalan sebesar 41,770 dan t tabel sebesar 1,796 (tabel t), maka t hitung > t tabel. Kecamatan Galis sebesar 46,455 dan t tabel sebesar 1,796 (tabel t), maka t hitung > t tabel, dan Nilai t hitung pada Kecamatan Geger sebesar 38,532 dan t tabel sebesar 1,796 (tabel t), maka t hitung > t tabel. Berdasarkan hasil analisis menunjukkan rata-rata kandungan senyawa kurkumin di Kecamatan Bangkalan tidak berbeda nyata. Kata kunci: Kabupaten Bangkalan, Sifat Kimia Tanah , Kurkumin

Turmeric (Curcuma domestica Val.) Is one of the potential medicinal plants, as well as raw materials for drugs are also used as herbs and natural dyes. The purpose of this study to determine the relationship of some soil chemical properties of the compound curcumin in turmeric rhizome plants in three Districts are in Bangkalan and to know the content of the compound curcumin in turmeric rhizome plants in three Districts in Bangkalan. The method used is regression analysis to find the relationship between the compounds curcumin turmeric with some chemical properties of soil (Soil Organic Matter, Nitrogen, phosphorus element, and the element potassium) in Bangkalan. Differences compounds curcumin turmeric in Three Districts in the analysis using comparative analysis One sample t test. The results of the regression equation is Y = 1.921 to 0.120 (X1) + 2.546 (X2) - 0,017 (X3) - 0,004 (X4). Research shows that the chemical properties of the soil in the form of Organic Matter, Nitrogen, phosphorus element, and the element Potassium affects some 87% of the compound curcumin in Three District of Bangkalan. Taken together, some soil chemical properties in the form of Soil Organic Matter, Nitrogen, phosphorus element, and the element Potassium has a significant influence or relationship to the compound curcumin turmeric plant in Three District of Bangkalan. Based One-Sample Test table, t value in the District of Bangkalan at 41.770 and t table amounted to 1.796 (Table t), then t> t table. Subdistrict Galis at 46.455 and t table amounted to 1.796 (Table t), then t> t table, and t value at the District Geger at 38.532 and t table amounted to 1.796 (Table t), then t> t table. Based on the results of the analysis showed that the average content of the compound curcumin in District Bangkalan not significantly different. Keywords: Bangkalan District, Soil Chemical Properties, Curcumin

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