Organic fertilizer can yield higher production compared to regular fertilizer if properly applied. Thus, it can be a solution to improve nutrient content of soil. The biggest source of bio slurry in plantation is from Palm Oil Mill Effluent (POME) and cow dung biogas. This research aimed to analyze the residue’s potential from the result of biogas processing and bio slurry from POME as slow-release fertilizer pellet. Bio slurry was processed into pellet through densification process using pellet mill. The research was arranged in a Randomized Block Design method with five slurry compositions as treatments, including 70:30, 60:40, 50:50, 40:60, and 30:70 (ratio of biogas slurry and POME slurry), each consisted of three replications. According to the data obtained, fertilizer pellets had characteristics of 25 – 29 mm of length, 5.23 – 5.85 mm of diameter, 0.44 – 0.53 g/cm3 of density, 54.78% - 81.96% of durability, and 7.81% - 8.57% of moisture content. Based on density and durability aspects, 30:70 composition was the higher. Macronutrient content of the five compositions were 1.88% - 2.72%, in which on day 22, N, P, and K release was 0.36 – 1.01%, 73.51 – 97.48%, and 3.19 – 7.85%, respectively. Meanwhile, on day 17, the nutrition solution conductivity of all compositions had already reached 0.80 – 1 mS/cm.
Penelitian ini bertujuan untuk mengetahui pengaruh antara sudut datang sinar dan kerapatan tanaman terhadap hasil pakcoy serta untuk mengetahui sudut datang sinar dan kerapatan tanaman yang tepat untuk hasil pakcoy pada sistem tanaman vertikultur. Penelitian ini dilaksanakan pada bulan Februari – Mei 2021 di Kost Putri Exclusive Lina yang terletak di Jalan Nangka II, Gang Sansadiar, Karangnongko, Maguwoharjo, Depok, Sleman, Daerah Istimewa Yogyakarta. Rancangan penelitian ini menggunakan rancangan acak kelompok faktorial yang terdiri dari 2 faktor dan 3 ulangan. Faktor pertama adalah sudut datang sinar (S) terdiri dari 3 aras yaitu 00 – 300, 300 – 600 dan 600 – 900. Faktor kedua adalah kerapatan tanaman (K) terdiri dari 3 aras yaitu 1 tanaman per lubang tanam, 2 tanaman per lubang tanam dan 3 tanaman per lubang tanam. Hasil penelitian menunjukkan bahwa sudut datang sinar dan kerapatan tanaman tidak berpengaruh nyata terhadap hasil pakcoy. Sedangkan untuk sudut datang sinar yang tepat untuk hasil pakcoy berada pada sudut datang sinar 300 – 600 dan untuk kerapatan tanaman yang baik untuk hasil pakcoy adalah kerapatan tanaman dengan 1 tanaman dalam satu lubang tanam.
This study seeks to determine the growth response and yield of Pakcoy plants grown in various nutrient concentrations and growing media types. This study employs a wick system and the split-plot method, which consists of the main plot, which is the Ab mix nutrition with three nutrient concentrations: 5 ml (N1), 7.5 ml (N2), and 10 ml (N3). The subplot is comprised of three kinds of planting media: Rockwool (M1), husk charcoal (M2), and cocopeat (M3). These two parameters were obtained through nine different treatment combinations. Each treatment was administered three times. The research data were analyzed with a split-plot design at a significance level of 5%. Followed by Duncan's test with a 5% significance level if there is a treatment difference. The results demonstrated a significant interaction between nutrient concentrations and the type of growing medium on the parameters of the number of leaves, plant dry weight, root fresh weight, root dry weight, root dry weight, root fresh weight, root fresh weight, root dry weight, crown fresh weight, and shoot dry weight. The results demonstrated a significant interaction between nutrient concentrations and the type of growing medium. The optimal treatment combination was found for all parameters at a nutrient concentration of 10 ml with Rockwool growing media.
Groundwater contamination due to nutrient contamination from inefficient fertilization processes can reduce oil palm productivity. In overcoming this problem, a simple and low-budget fertilization method, namely trunk injection, was applied to maintain the productivity of oil palm plants and was environmentally friendly. Therefore, trunk injection as a simple method was applied to increase the quantity and quality of the bunch average weight of palm oil to support the sustainable management of groundwater availability. The research was conducted from April 2019 to April 2020. The location of the oil palm plantation is in the Nunukan Regency, North Kalimantan Province. The nutrients used as a nutrient solution consist of N, P, K, Ca, Mg, S, Fe, B, Cu, Zn, Mn, and Mo. Bunch Average Weight (BAW) wasmeasured 7, 8, and 9 months following application with 15 x harvest rotations. The distribution of data for 15 times of BAW rotation showed that the standard deviation, standarderror, and range in the trunk injection treatment tended to produce a more sloping graph than what occurred in the control subjects. Nutritional injection tended to increase the BAW weight in contrast to trees without nutrient injection (control).
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