The Effect of Additional Organic Matter on The Content of Nitrogen, Fosfor, and Kalium in The Manufacture of Liquid Organic Fertilizer
Ratna Juwita1*, Muhammad Alfian Mizar2, Indra Kurniawan Saputra1, Bayu Satriyo Wibowo3, Dhea Amalia Putri Diva1, Endang Wahyuni1, Hanif Nabila Rahmi1, Nurlayla Astarin3 , and Alfrida Parma Fadmasari3

1Department of Biotechnology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang 65145, Indonesia
2Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Malang, Jl. Semarang No. 5, Malang 65145, Indonesia
3Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang 65145, Indonesia

Abstract

The production of fresh fruit processing produces skin waste which can cause environmental pollution if not processed properly. This organic waste can be used as liquid organic fertilizer (POC) which contains nutrients, especially nitrogen (N), phosphorus (P), and potassium (K). The use of POC can help improve soil structure and quality. The advantage of POC is the nutrients contained are more easily absorbed by plants than solid organic fertilizers. In this study, POC was made from several types of organic waste, namely star fruit skin, pineapple, and papaya. The method of making POC with the fermentation process was carried out for one month and samples were taken on days 7, 14, 21, and 29 to analyze the nitrogen content by Kjeldahl method, phosphorus and potassium by UV-vis spectrophotometry method. This study aims to identify the levels of NPK in the waste of star fruit, pineapple, and papaya combined with household waste such as: animal bones, animal blood, wood ash, and azolla microphylla. In this study, the best POC was produced with a fermentation time of 7-14 days with the addition of azolla microphylla it could increase the nitrogen element in plants.

Keywords: POC, NPK, fermentation

Topic: Biochemistry