This research was aimed to get the optimum NPK fertilizer dosage with the time of liquid organic fertilizer application to support the growth and yield of pakcoy (Brassica rappa L.). The study used a Randomized Block Design with three replications. Observation variables included plant height, leaf number, leaf area, total plant weight, root length, root weight and total plant weight percentage. The results showed that N0 (without NPK fertilizer) was the best based on the plant height and leaf number. Liquid organic fertilizer given at 3-time applications per plant (W3) contributed significantly to leaf number at 35 days after planting and gave the highest yield of leaves, with 17,45 leaves. The treatment of NPK compound fertilizer dosage with the time of liquid organic fertilizer gave significant effects on the leaf area, total plant weight, root length, and root weight. Keywords: liquid organic fertilizer, NPK, pakcoy   ABSTRAK Penelitian ini bertujuan untuk mendapatkan dosis pupuk NPK dengan waktu plikasi pupuk organik cair yang tepat untuk menunjang pertumbuhan danp roduksi tanaman pakcoy (Brassica rappa L.). Penelitian mengunakan Rancangan Acak Kelompok dengan tiga ulangan. Peubah-peubah pengamatan meliputi tinggi tanaman, jumlah daun, luas daun, berat total tanaman, panjang akar, berat akar dan persentase berat total tanaman. Hasil penelitian menunjukkan bahwa perlakuan N0 (tanpa pupuk NPK) merupakan yang terbaik dari penelitian ini terhadap parameter tinggi tanaman dan jumlah daun. Waktu pemberian pupuk organik cair 3 kali/tanaman (perlakuan W3) memberikan kontribusi yang signifikan terhadap jumlah daun 35 hari setelah tanam dan menghasilkan daun terbanyak dengan jumlah 17,45 helai. Perlakuan dosis pupuk majemuk NPK dengan waktu pemberian pupuk organik cair memberikan pengaruh yang nyata sampai sangat nyata terhadap luas daun, berat total tanaman, panjang akar serta berat akar. Kata kunci: NPK, pakcoy, pupuk organik cair

Chili (Capsicum annum L.) often experience the highest price fluctuations in Indonesia. This is caused by the production that is often disrupted in certain months, especially in the months in the rainy season due to flowers and fruits that fall before the harvest. Since agricultural land has changed its function for infrastructure development, marginal land (Ultisol) is used. The ultisol problem is: high acidity, low organic matter content, nutrient deficiency important for plants (eg N, P, Ca, Mg and Mo) and high solubility of Al, Fe and Mn. The provision of organic materials such as manure and marine mud will overcome the problem of acid-rich mineral soil and play an important role in improving, increased and maintaining sustainable land productivity. Research results for chili flower significantly. the highest number of flowers found in the treatment of L0P3, L1P2, L1P3 and L2P3 that is > 60 flower/plant. There was a single factor effect for the amount of fruit, mostly found in L3 treatment (600 ton/ha marine mud) that is 22.36 fruit/plant. The treatment of manure significantly influenced the formation of the most fruit set in the treatment of P0 and P2 (without manure and manure 20 ton/ha) that is 77.60% and 70.,45%. Keywords: Ultisol, Marine mud, Manure, Flowers and Fruit sets   ABSTRAK Tanaman cabai besar (Capsicum annum L.) sering mengalami fluktuasi harga paling tinggi di Indonesia. Hal tersebut disebabkan oleh produksi yang sering terganggu pada bulan tertentu terutama pada bulan-bulan di musim penghujan dikarenakan bunga dan buah yang rontok sebelum panen. Karena lahan pertanian banyak beralih fungsinya untuk pembangunan infrastuktur, maka digunakan lahan marginal (Ultisol). Masalah ultisol ialah: kemasaman tinggi, kadar bahan organik yang rendah, kekurangan unsur hara penting bagi tanaman (contoh: N, P, Ca, Mg dan Mo) serta tingginya kelarutan Al, Fe dan Mn. Pemberian bahan organik seperti pupuk kandang dan Lumpur laut akan mengatasi persoalan tanah mineral masam berkadar Al tinggi dan berperan penting dalam memperbaiki, meningkatkan serta mempertahankan produktifitas lahan secara berkelanjutan Hasil Penelitian untuk jumlah bunga cabai berpengaruh signifikan. jumlah bunga terbanyak terdapat pada perlakuan L0P3, L1P2, L1P3 dan L2P3 yaitu > 60 bunga/tanaman. Terjadi pengaruh faktor tunggal untuk jumlah buah, terbanyak terdapat pada perlakuan L3 ( 600 ton/ha lumpur laut) yaitu 22,36 buah/tanaman. Perlakuan pupuk kandang berpengaruh signifikan Pembentukan fruit set terbanyak pada perlakuan P0 dan P2 (tanpa pupuk kandang dan pupuk kandang 20 ton/ha) yaitu 77,60% dan 70,45%. Kata kunci: Ultisol, Lumpur Laut, Pupuk Kandang, Bunga dan Fruit set

Abstract:Marine mud and manure are potential for improving ultisol conditions, especially soil acidity, CEC, base saturation, organic acid, soil structure, soil nutrient retention, aeration, soil humidity, water holding capacity, infiltration, and supply of phosphorus for plant growth and development. Two treatments, namely planting media with 200 t marine mud /ha + 30 t manure / ha, and 400 t marine mud /ha + 30 t manure / ha were able to increase pH from 4.6 to 5.6. A significant decrease of exchangeable Al solubility of about 0.03 meq/100 g was found in M1O3; M2O1; M2O3 and M3O1 treatments. An increase of available phosphorus about 5.02 mg/kg was found at 200 t marine mud/ha + 30 t manure/ha treatment. There was a significant increase in plant height of about 62.42 cm in the media without marine mud and 30 t manure/ha. Application of 30 t manure/ ha yielded plant with leaf size of about 9552 cm 2 / plant and fresh fruit of about 9.81 t/ha.

Organic fertilizers have an important role in the success of vegetable cultivation. Marine mud contains a lot of nutrients and organic matter, so it is useful for improving degraded soils in the short term and a source of nitrogen and minerals (especially Ca and Mg) in the long term. This study aimed to examine and explain the effect of doses of cow dung fertilizer and marine mud, for the growth and yield of spoon mustard (Brassica rapa L). This research was conducted at the Plastic House of the Faculty of Agriculture, Pattimura University, from June to August 2018. The experiment in this study was a factorial experiment in a completely randomized design with two factors. The first factor was sea mud from Tulehu Village (L) with 4 levels, namely: without sea mud (control), 100 g, 200 g and 300 g per kg of soil. The second factor was cow manure (K) with 4 levels, namely: without cow manure (control), 5 g, 10 g. and 15 g per kg of soil. The variables observed included plant height, leaf number, leaf area, plant biomass fresh weight, crown fresh and root fresh weight. Data were analyzed using Analysis of Variance (ANOVA) and further test using Duncan's test at 0.05 level. The results showed that the sea mud treatment had a very significant effect on the variables of plant height (3, 4 and 5 weeks after planting, WAP), leaf number (4 and 5 WAP), leaf area, plant biomass weight and plant crown weight, number of leaves (3 WAP) and root weight, but had no significant effect on plant height at age (1 and 2 WAP), and number of leaves (1 and 2 WAP). The treatment of cow dung fertilizer had a very significant effect on the variables of plant height (2, 4 and 5 WAP), number of leaves (3 and 5 WAP), plant biomass weight and plant crown weight, a significant effect on plant height (3 WAP), leaf number (4 WAP), but had no significant effect on plant height (1 WAP), leaf number (1 and 2 WAP), leaf area and root weight of plants. The interaction between the treatment of marine mud and cow manure gave a very significant effect on plant height (4 and 5 WAP), but there was no interaction on the other observation variables. Keywords:  cow manure, marine mud, ‘spoon’ mustard, Ultisol soil   ABSTRAK Pupuk organik mempunyai peranan penting terhadap keberhasilan budidaya tanaman sayuran. Endapan lumpur laut banyak mengandung unsur hara dan bahan organik, sehingga bermanfaat untuk memperbaiki tanah-tanah terdegradasi untuk jangka pendek dan sumber nitrogen dan mineral (khususnya Ca dan Mg) untuk jangka waktu panjang. Penelitian ini bertujuan untuk menguji dan menjelaskan pengaruh dosis pupuk kotoran sapi dan dosis lumpur laut untuk pertumbuhan dan produksi tanaman sawi sendok (Brassica rapa L). Penelitian ini dilaksanakan di Rumah Plastik Fakultas Pertanian, Universitas Pattimura dari bulan Juni sampai Agustus 2018. Percobaan dalam penelitian ini merupakan percobaan faktorial dalam Rancangan Acak Lengkap dengan dua faktor. Faktor pertama adlah lumpur laut (L) dari desa Tulehu dengan 4 taraf, yaitu: tanpa lumpur laut (kontrol), 100 g, 200 g dan 300 g per kg tanah. Faktor kedua adalah pupuk kotoran sapi (K) dengan 4 taraf, yaitu: tanpa pupuk kotoran sapi (kontrol), 5 g, 10 g. dan 15 g per kg tanah. Variabel yang diamati meliputi tinggi tanaman, jumlah daun, luas daun, bobot segar biomassa tanaman, bobot segar tajuk tanaman dan bobot segar akar tanaman. Data dianalisis menggunakan Analisis of Varians (ANOVA) dan uji lanjut menggunakan uji Duncan pada taraf 0,05. Hasil penelitian menunjukkan bahwa perlakuan lumpur laut berpengaruh sangat nyata terhadap variable tinggi tanaman (3, 4 dan 5 minggu setelah tanam, MST), jumlah daun (4 dan 5 MST), luas daun, bobot biomassa tanaman dan bobot tajuk tanaman, berpengaruh nyata terhadap jumlah daun (3 MST) dan bobot akar tanaman, tetapi berpengaruh tidak nyata terhadap tinggi tanaman umur (1 dan 2 MST), dan jumlah daun (1 dan 2 MST). Perlakuan pupuk kotoran sapi berpengaruh sangat nyata terhadap variable tinggi tanaman (2, 4 dan 5 MST), jumlah daun (3 dan 5 MST), bobot biomassa tanaman dan bobot tajuk tanaman, berpengaruh nyata terhadap tinggi tanaman (3 MST), jumlah daun (4 MST), tetapi tidak berpengaruh nyata terhadap tinggi tanaman (1 MST), jumlah daun (1 dan 2 MST), luas daun dan bobot akar tanaman. Interaksi antara perlakuan lumpur laut dan pupuk kotoran sapi memberikan pengaruh sangat nyata terhadap tinggi tanaman (4 dan 5 MST), namun tidak ada interaksi pada variable pengamatan lainnya. Kata kunci: lumpur laut, pupuk kotoran sapi, sawi sendok, tanah Ultisol.