Purpose Protein hydrolysates (PHs) have attracted much interest in recent years owing to the beneficial effects on plant growth. Feather, one of the most abundant wastes generated from the poultry industry, is rich in proteins and amino acids. It can be utilized to generate value-added bioproducts such as liquid feather protein hydrolysate (FPH). This research aims to evaluate the effect of FPH as fertilizer on plant growth. Methods Hydrothermal treatment (HTT) at a temperature of 160-180 °C and a holding time of 30 min was employed to convert feathers into a liquid feather-derived protein hydrolysate (FPH) containing nitrogen and amino acids. To evaluate the effect of FPH produced from the HTT process on plant growth, FPH (0.5-5 mL/L) and its combination with 50% recommended dose of chemical fertilizers were applied to patchouli and mung bean plants. Results Results showed that the combination of FPH and 50% dose chemical fertilizer on patchouli yielded a statistically significant increase in leaf area, dry weight, and chlorophyll content in comparison to the control, suggesting that the application of FPH along with the inorganic fertilizer can increase fertilizer use efficiency. Combined treatment of inorganic fertilizer and FPH on mung bean also showed a relatively higher yield per plant compared with control. Conclusion Hydrothermal treatment (HTT) can be a useful method for nutrient recovery from animal residuals such as feather. The application of FPH obtained through HTT could improve crop productivity and reduce chemical fertilizer consumption.

Suherman, C. dkk: Pertumbuhan dan hasil tanaman cabai (Capsicum Sp.) yang diberi pupuk hayati pada pertanaman kelapa sawit (Elaeis guineensis Jacq.) TBM I Suherman, C. • M. A. Soleh • A. Nuraini • Annisa NF Pertumbuhan dan hasil tanaman cabai (Capsicum Sp.) yang diberi pupuk hayati pada pertanaman kelapa sawit (Elaeis guineensis Jacq.) TBM I The growth and yield of chili crop (Capsicum sp.) under application of organic fertilizer on oil palm (Elaeis guineensis Jacq.) cultivation at 1 st Immature Plant Suherman, C. dkk: Pertumbuhan dan hasil tanaman cabai (Capsicum Sp.) yang diberi pupuk hayati pada pertanaman kelapa sawit (Elaeis guineensis Jacq.) TBM I

The growth response of oil palm (Elaeis Guineensis Jacq.) seedling toward the application of organic fertilizer from palm fronds and NPK compound fertilizerThe research was aimed to study the influence between organic fertilizers from palm fronds and NPK compound fertilizer to reduce NPK compound fertilizer in main nursery. The experiment was conducted from January to April 2017 at the Experiment Station Ciparanje, Faculty of Agriculture, Universitas Padjadjaran. The experimental design used was Randomized Block Design that arranged in factorial patterns with two factors and three replications. The fisrt factor was dosage of organic fertilizers from palm fronds consisted of three levels of 0 g/polybag, 800 g/polybag, and 1600 g/polybag and the second factor was dosage of NPK compound fertilizer consisted of four levels of 0 g/polybag, 20 g/polybag, 40 g/polybag, and 60 g/polybag. The result of the experiment showed that there was interaction effect between organic fertilizers from palm fronds and NPK compound fertilizer on height of seedling and dry weight of the shoot. The dosage of 1600 g/polybag organic fertilizers from palm fronds with the dosage of 20 g/polybag NPK compound fertilizer showed the best result in dry weight of the shoot.Keywords: Oil palm seedling, Main nursery, Organic fertilizer, Palm frond, NPK compound fertilizerABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh interaksi antara pupuk organik asal pelepah kelapa sawit dengan pupuk majemuk NPK yang baik untuk mengurangi penggunaan pupuk majemuk NPK di pembibitan utama kelapa sawit. Percobaan dilaksanakan dari bulan Januari sampai dengan April 2017 di Kebun Percobaan Ciparanje, Fakultas , Universitas Padjadjaran. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok dengan pola faktorial yang diulang sebanyak tiga kali. Faktor pertama meliputi dosis pupuk organik asal pelepah kelapa sawit terdiri dari tiga taraf yaitu 0 g/polybag, 800 g/polybag, dan 1600 g/polybag dan faktor kedua dosis pupuk majemuk NPK yang terdiri empat taraf yaitu 0 g/polybag, 20 g/polybag, 40 g/polybag, dan 60 g/polybag. Hasil percobaan menunjukkan bahwa terdapat pengaruh interaksi pupuk organik asal pelepah kelapa sawit dengan pupuk majemuk NPK terhadap tinggi tanaman dan bobot kering tajuk. Perlakuan pupuk organik asal pelepah kelapa sawit 1600 g/bibit dengan pupuk majemuk NPK 20 g/bibit menghasilkan bobot kering tajuk bibit kelapa sawit terbaik.Kata Kunci: Bibit kelapa sawit, Pembibitan utama, Pupuk organik, Pelepah kelapa sawit, NPK

Palm oil production has increased significantly, specifically in Indonesia and Malaysia. However, this growth has raised environmental concerns due to the high discharge of empty fruit bunches, palm oil mill effluents, and other solid wastes. Therefore, this study aims to examine the treatment of palm oil waste by composting and systematically review insights into its application through a systematic literature review approach. Among the 1155 articles, a total of 135 were selected for a systematic review of palm oil waste management developments and their applications, while 14 were used for determining compost quality according to the criteria and requirements established in the systematic literature review. Moreover, using Egger’s test, JAMOVI 1.6.23 software was used to analyze random effects models with 95% confidence intervals and publication bias. The results showed that palm oil waste was optimally treated by composting, which is considered as a sustainable technology for protecting the environment, human safety, and economic value. The in-vessel method with a controlled composting chamber is the best system with a minimum time of 14 days. However, it requires tight control and provides a final product with a high microbial colony form outdoors and indoors compared to the windrow system. This study is useful to see the bias of research results and helps to find new studies that need to be developed, especially in this case related to the management of palm oil waste into organic compost fertilizer and its application methods in the field. It is suggested that applying palm oil waste or compost is mainly performed by mulching. In contrast, new challenges for better processing to produce organic fertilizers and applicable technologies for sustainable waste management are recommended. The method must be affordable, efficient, and practical, combining compost quality with maximum nutrient recovery.

Rubber is one of main commodities of plantation crops that numerously developed in various districts in Indonesia. The role of the plant is strategic in human life in line with the increasing demand of world rubber. The optimum production increament of the rubber plant begins with the selection of a superior clone and the use of quality seeds. Fertilizing as a means of providing soil nutrients to plants should also be taken carefully.  One of the fertilization is by the provision of organic fertilizers in the form of washed rice water. This research aims to find out the effect of washed rice water in a different volume and frequency applied as organic fertilizer on the growth of rubber seedling GT1 clone.The experiment wasconductedfrom September 2011 toJanuary2012 atthe Experimental Station of Faculty of Agriculture, Universitas Padjadjaran. The experiment was arranged inRandomized Block Designed, with 9 treatments and 3 replications, thus there are 27 units of the experiment. The treatments were providing 100 ml  washed rice water with frequency of 3 days, 100 ml washed rice water with frequency of 5 days, 100 washed ml rice water with frequency of 7 days, 300 ml washed rice water with frequency of 3 days, 300 ml washed rice water with frequency of 5 days, 300 ml washed rice water with frequency of 7 days, 500 ml washed rice water with frequency of 3 days, 500 mL washed rice water with frequency of 5 days, and 500 ml washed rice water with frequency of 7 days. The results of the experiment showed that by providing 500 ml washed rice water with frequency of 3 days gave the best increament for stem height and diameter on rubber seedling GT1 clone.

Di Indonesia sebagian besar perkebunan kelapa merupakan perkebunan rakyat dimana teknik budidaya yang diterapkan belum diperhatikan dengan baik yang menyebabkan produktivitasnya rendah. Penggunaan input misalnya air kelapa sebagai ZPT alami diharapkan dapat menjadi teknologi yang bermanfaat dalam mengembangkan salah satu aspek teknik budidaya dalam pengelolaan tanaman kelapa. Air kelapa mengandung banyak bahan mineral dan hormon sitokinin dan auksin yang dapat membantu meningkatkan pertumbuhan tanaman. Percobaan ini bertujuan untuk mengetahui pengaruh pemberian air kelapa muda terhadap pertumbuhan tanaman kelapa belum menghasilkan (TBM). Percobaan dilakukan di Kebun Percobaan Ciparanje Fakultas Pertanian Universitas Padjadjaran, Jatinangor Kabupaten Sumedang pada bulan Maret 2017 – Mei 2017. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan perlakuan air kelapa yang terdiri dari tiga taraf konsentrasi yaitu A = 100% air kelapa, B = 50% air kelapa + 50% air, C = 100% air yang masing-masing diulang enam kali. Uji lanjut menggunakan uji lanjut Beda Nyata Terkecil (BNT) taraf 5%.  Hasil penelitian menunjukkan bahwa pemberian air kelapa dengan konsentrasi 100% menghasilkan respons terbaik pada pertumbuhan luas daun kelapa pada fase TBM. Air kelapa dengan konsentrasi 50% cenderung menghasilkan peningkatan pertumbuhan tinggi kelapa TBM.

Intensive agricultural practices and heavy use of inorganic fertilizers have significantly accelerated soil degradation. Mineralization of the organic matter of soil affects soil health and the abundance of soil beneficial microbes (SBMs) and its dynamics in the soil. The research to investigate the shifting of microbial population and the soil health was conducted in natural forest, agricultural, and degraded ecosystems. The research setting involved randomized block design consisting of six ecosystems, namely, natural forest, agricultural soil (oil palm: 10, 9, 8, and 7 years old), and degraded soils. The soil samples were taken with four replications from rhizomicrobiome of each land use. In the soil health analysis, it was understood that soil beneficial microbes (SBMs) consist of total bacteria, phosphate-solubilizing bacteria, nitrogen-fixing bacteria, total actinomycetes, and total fungi). The results showed that natural forest, oil palm plantation, and degraded land demonstrated a significant effect on the changes in biodiversity of SBM in rhizomicrobiome. The highest population of SBMs was in natural forest followed by the 10-year-old oil palm plantations and the lowest was recorded in degraded soils. These results confirm that the shift of forest ecosystems to agricultural soils will accelerate the degradation and decline of soil health.

ABSTRAKRami adalah salah satu jenis tanaman penghasil serat yang memiliki potensi hasil lebih tinggi dibanding tanaman kapas. Salah satu faktor penentu tinggi rendahnya hasil adalah panjang dan jumlah serat, yang antara lain ditentukan oleh tinggi dan diameter batang tanaman. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi giberelin dan pupuk organik cair rami serta memperoleh salah satu kombinasi konsentrasi giberelin dan POC rami yang memberikan pengaruh terbaik pada pertumbuhan dan hasil serat tanaman rami klon Ramindo 1. Percobaan dilaksanakan dari bulan Januari 2016 sampai bulan Maret 2016 di kebun percobaan CiparanjeFaperta  Universitas Padjadjaran, Jatinangor, dengan ketinggian tempat mencapai  829 m di atas permukaan laut, dengan tanah ordo Inceptisol, dan tipe iklim berdasarkan klasifikasi Schmidt dan Ferguson (1951) termasuk tipe C. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) yang terdiri dari 8 perlakuan dan diulang sebanyak 4 kali, dengan perlakuan kombinasi GA0 ppm+ tanpa POC, GA50 ppm + tanpa POC, GA100 ppm + tanpa POC, GA150 ppm + tanpa POC, Larutan GA0 ppm + 40 ml/L POC, GA50 ppm + 40 ml/L POC, GA100 ppm + 40 ml/L POC, GA150 ppm + 40 ml/L POC. Hasil percobaan menunjukkan bahwa pemberian kombinasi dosis giberelin dan pupuk organik cair rami dapat mempengaruhi pertumbuhan dan hasil serat tanaman rami klon Ramindo 1. Perlakuan GA 150 ppm dan 40 ml/L pupuk organik cair (POC) dapat meningkatkan tinggi tanaman, diameter batang, bobot kering tanaman, bobot basah tanaman, dan bobot segar batang tanaman rami klon Ramindo 1.Kata kunci : Giberelin, pupuk organik cair, rami