J. Berkala Penelitian Agronomi 9 (2) : 75 – 86 (2021) p-ISSN 2089-9858 e-ISSN 2502-3314 Pengaruh Air Kelapa (Cocos nucivera) dan Bokashi Kirinyuh (Chromolaena odorata) terhadap Pertumbuhan Tanaman Sawi (Brassica juncea L.) The Effect of Coconut Water (Cocos nucivera ) and Bokashi of Kirinyuh (Chromolaena odorata ) on the Growth of Mustard Greens (Brassica juncea L.) Sumardin 1 , Andi Bahrun 2* , dan Norma Arif 2 1 Program Studi Magister Agronomi Pascasarjana Universitas Halu Oleo 2 Jurusan Agroteknologi Fakultas Pertanian Universitas Halu Oleo Diterima: 08 Januari 2021/Disetujui: 25 September 2021 ABSTRAK Produksi tanaman sawi (Brassica juncea L.) rendah akibat kesuburan tanah yang rendah. Penggunaan bokashi kirinyuh dan air kelapa muda mungkin dapat memperbaiki kesuburan tanah dan dapat meningkat pertumbuhan dan produksi tanaman sawi. Penelitian ini bertujuan untuk mengetahui pengaruh penyiraman air kelapa (Cocos nucivera) dan pemberian dosis bokasi krinyuh (Chromolaena odorata) terhadap pertumbuhan tanaman sawi (Brassica juncea L.). Penelitian ini disusun berdasarkan Rancangan Acak Kelompok (RAK) dalam pola faktorial yang terdiri dari 2 faktor. Faktor pertama adalah air kelapa muda yang terdiri atas 4 taraf: tanpa air kelapa (A0), air kelapa muda 100 ml per tanaman (A1), 150 ml per tanaman (A2), 200 ml per tanaman (A3). Faktor kedua adalah bokasi krinyuh yang terdiri atas 4 taraf yaitu tanpa bokasi kirinyuh (K0), 7,5 g bokasi kirinyuh/kg tanah (K1), 10 g bokasi kirinyuh/kg tanah (K2), 12,5 g bokasi kirinyuh/kg tanah (K3). Hasil penelitian menunjukan bahwa air kelapa berpengaruh terhadap tinggi tanaman, jumlah daun dan luas daun tanaman sawi. Perlakuan air kelapa 200 ml/tanaman meningkatkan tinggi tanaman, jumlah daun dan luas daun masing-masing 30.88%, 27,59% dan 56.96% dibanding dengan kontrol pada umur 28 hari setelah tanam. Bokashi kirinyuh berpengaruh terhadap tinggi tanaman, jumlah daun, luas daun, berat segar dan kering akar serta berat segar dan berat kering tanaman sawi. Perlakuan 12,5 g bokashi kirinyuh kg -1 tanah meningkatkan tinggi tanaman, jumlah daun, luas daun, berat segar akar, berat kering akar, berat segar tanaman dan berat kering tanaman sawi masing- masing 40.63%, 30,39, 74.91%, 311.22%, 325.93%, 390.10% dan 224.17% dibanding dengan kontrol pada umur 28 hari setelah tanam. Kata Kunci: Air kelapa muda, bokasi; krinyuh, pertumbuhan; tanaman sawi. ABSTRACT Yield of mustard plant (Brassica juncea L.) is low due to low soil fertility. The use of coconut water and bokashi of kirinyuh may improve soil fertility, increase the growth and yield of mustard greens. This research aims to determine the effect of coconut water (Cocos nucivera ) and bokashi of kirinyuh (Chromolena odorata ) on growth of mustard greens. This research was arranged based on a Randomized Block Design (RBD) in a factorial pattern consisted of two factors. The first factor is coconut water consisted of 4 levels: without coconut water (A0), 100 ml/plant of coconut water (A1), 150 ml/plant of coconut water (A2), and 200 ml/plant of coconut water (A3). The second factor is the organic fertilizer of krinyuh consisted of 4 levels: without kirinyuh (K0), 7,5 g of bokashi kirinyuh/kg soil (K1), 10 g of bokashi kirinyuh/kg soil (K2), and 12,5 g of bokashi kirinyuh/kg soil (K3). This research shows that there was not a significant effect on the interaction between coconut water and bokashi of kirinyuh on the growth of mustard greens. The use of coconut water had a significantly effect on plant height, number of leaves and leaf area. The use of 200 ml/plant of coconut water increased plant height, number of leaves and leaf area by 30.88%, 27,59% dan 56.96% , respectively, compared to control at 28 days after planting. Bokashi of krinyuh had a significant effect on plant height, number of leaves, leaf area, root fresh weight, root dry weight, shoot fresh weight and shoot dry weight by 40.63%, 30,39, 74.91%, 311.22%, 325.93%, 390.10% dan 224.17%, respectively, compared to control at 28 days after planting. Keywords: Coconut water; bokashi; growth; kirinyuh; mustard greens. J. Berkala Penelitian Agronomi 9 (2) : 75 – 86 (2021) * Penulis untuk korespondensi, E-mail : andibahrun7@gmail.com 75