Padi hitam memiliki kandungan antosianin yang tinggi sehingga dijadikan sebagai pangan fungsional karena bermanfaat bagi kesehatan. Tanah Inceptisol termasuk tanah pertanian di Indonesia yang sebarannya cukup luas yaitu sekitar 70.52 juta ha (37.5%), akan tetapi memiliki permasalahan yaitu unsur N pada tanah yang relatif rendah. Oleh karena itu, perlu dilakukan teknik budidaya yang tepat. Salah satunya melalui pemberian pupuk berimbang, yaitu pemberian pupuk organik yang bertujuan untuk memperbaiki kesuburan tanah dan mengurangi penggunaan pupuk NPK, serta pemberian pupuk anorganik bertujuan untuk meningkatkan hasil padi. Penelitian ini bertujuan untuk mengetahui pengaruh dari pemberian macam pupuk organik dan pupuk N,P,K terhadap C-Organik, N-Total, C/N, Serapan N, serta hasil Padi Hitam (Oryza sativa L. indica) pada Inceptisol asal Jatinangor. Aplikasi macam pupuk organik diharapkan mampu menurunkan dosis pupuk N,P,K tanpa mengurangi hasil padi. Penelitian ini dilakukan pada bulan Juli 2018 sampai dengan Desember 2018 di screen house kebun percobaan Ciparanje Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Sumedang, Jawa Barat dengan ketinggian ± 750 meter di atas permukaan laut. Rancangan percobaan yang dilakukan menggunakan Rancangan Acak Kelompok (RAK) yang terdiri dari 10 perlakuan dengan tiga ulangan. Macam pupuk organik yang digunakan terdiri dari kompos jerami, kotoran ayam, kotoran sapi dan kotoran domba. Pupuk N,P,K ½ dan 1 dosis (dosis anjuran pupuk N,P,K adalah 300 kg Urea ha-1; 50 kg TSP ha-1 dan 50 kg KCl ha-1). Hasil penelitian menunjukkan bahwa aplikasi macam pupuk organik dan pupuk N,P,K memberikan pengaruh terhadap C-organik, C/N, serapan N, serta hasil padi hitam. Aplikasi kotoran ayam dan 1 dosis N,P,K memberikan hasil padi hitam terbaik yaitu sebesar 55,40 g/tanaman atau setara dengan 7,09 t.ha-1
Rice is a food source of carbohydrate which is a staple food in Indonesia. One way to increase production is to control soil productivity by using organic and inorganic fertilizers. This research was conducted to determine the effect of organic fertilizer combined with N, P, K inorganic fertilizers on the chemical properties and growth of rice plants. This research was conducted from June-September 2018. The experimental design was carried out using a Randomized Block Design (RBD) consisting of 10 treatments with three replications. The treatment combination consisted of liquid organic fertilizer dosages of 0 ml / L, 2.5 ml / L, 5 ml / L 7.5 ml / L and 10 ml / L and inorganic fertilizer N doses of 0 kg / ha, 50 kg / ha, 100 kg / ha, 150 kg / ha 200 kg / ha. inorganic P 0 kg / ha, 37.5 kg / ha, 75 kg / ha, 112.5 kg / ha, 150 kg / ha inorganic K 0 kg / ha, 12.5 kg / ha, 25 kg / ha, 37.5 kg / ha 50 kg / ha. The results showed that the combination of organic and inorganic fertilizers N, P, K did not influence the soil chemical properties and plant growth. The highest yields on plant height after 8 WAP were shown in treatment D (1 dose of LOF + 1 N, P, K) with 58.03 cm.
The Relationship between N, P, and K Uptake of Chili Plants to Their Residues in Soil Treated by Liquid Organic Fertilizers and NPKThis study aims to determine the relationship of N, P, and K uptake of chili plants towards the residues in the soil treated with liquid organic fertilizer with the addition of inorganic fertilizers of N, P and K. The research was conducted from September 2017 to January 2018 in the experimental field and KTNT Laboratory, Faculty of Agriculture, Universitas Padjadjaran. The design used was simple complete randomized design with 10 treatments and were repeated 3 times, with the treatment arrangement as follows: A = Control 0 PS + 0 NPK, B = 0 PCO + 1 NPK, C = 1 PCO + 0 NPK, D = 1 PCO + ¼ NPK, E = 1 PCO + ½ NPK, F = 1 PCO + ¾ NPK, G = 1 PCO + 1 NPK, H = ¼ PCO + ¾ NPK, I = ½ PCO + ¾ NPK and J = ¾ PCO + ¾ NPK. The results showed that the highest nutrient uptake and residue was found in the treatment of 1 PCO + ¾ NPK. Relationship between N, P and K uptake with nutrient residue on the soil was detected. The N, P and K residues were influenced by the N, P and K uptake of chili plants of 92%, 98%, and 97%, respectively.Keywords: Chili, NPK, Liquid Organic Fertilizer, Residue, AbsorptionABSTRAKPenelitian ini bertujuan untuk mengetahui hubungan serapan N, P, dan K tanaman cabai terhadap residunya di dalam tanah yang diberi pupuk cair organik dengan pupuk anorganik N, P dan K. Penelitian dilaksanakan pada bulan September 2017 sampai dengan Januari 2018 di kebun percobaan dan Laboratorium KTNT Fakultas Pertanian, Universitas Padjadjaran. Rancangan yang digunakan adalah RAK sederhana dengan 10 perlakuan yang diulang 3 kali dengan susunan perlakuan sebagai berikut: A = Kontrol 0 PS + 0 NPK, B = 0 PCO + 1 NPK, C = 1 PCO + 0 NPK, D = 1 PCO + ¼ NPK, E = 1 PCO + ½ NPK, F = 1 PCO + ¾ NPK, G= 1 PCO + 1 NPK, H = ¼ PCO + ¾ NPK, I = ½ CO + ¾ PK dan J = ¾ PCO + ¾ NPK. Hasil penelitian menunjukkan bahwa serapan dan residu hara tertinggi ialah perlakuan F = 1 PCO + ¾ NPK. Terdapat hubungan antara serapan N, P dan K dengan residu hara pada tanah. Residu N, P dan K dipengaruhi oleh serapan N, P dan K tanaman cabai masing-masing sebesar 92% serapan N, 98% serapan P, dan 97% serapan K.Kata Kunci: Cabai, NPK, PCO, Residu, Serapan
Soil quality test is needed to find out the influence of landuse change due to soil quality dan characteristics. This research aims to comparing various land use that influence the physical, chemical and biological soil on Andisol and Inceptisol, obtain information of soil quality at various land uses on Andisol and Inceptisol, and study the relationship between soil quality and erosion at various land use The study was conducted in Sub Sub watershed Hulu Cimanuk with an area of 16.171 hectares. The study was conducted on four different types of land use namely forest land, agriculture land, tea garden and mixed garden. The study was conducted with survey methods, descriptive and comparative. Erosion calculation using the RUSLE formula.Analysis of soil quality is calculated based on criteria Mausbach & Seybold (1998) and modified in accordance with the conditions of the study area. The results showed that each land use has a different effect on soils quality nor with erosion. Soil quality on forest land has higher value than other land use and erosion that occurs most low at 0.2 tonnes / ha / year. The use of dry land has the lowest value of soil erosion begitupula highest of 387 tonnes / ha / year.Key words: erosion, landuse change, soil quality, and watershed.
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