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CHARACTERIZATION AND QUALITY ASSESSMENT OF INDONESIAN COMMERCIAL BIOFERTILIZERS Edi Husen Husen; R.D.M. Simanungkalit; Rasti Saraswati; Irawan Irawan
Indonesian Journal of Agricultural Science Vol 8, No 1 (2007): April 2007
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v8n1.2007.p31-38

Abstract

Biofertilizers currently sold in the market are not labeled with a distinct quality standard. As such, farmers may buy low quality biofertilizers, which can reduce their profit and trust on the benefit of biofertilizers. This paper presents the characteristics of various products of commercial biofertilizers as well as farmers’ knowledge and experience on the products. The study was carried out in 2004-2006 by collecting and analyzing data on registered commercial biofertilizers, checking their availability at the market (39 agricultural shops), and interviewing farmers on their knowledge and experience on the use of biofertilizers on various farming systems in Bandung District, West Java (86 respondents) and Semarang District, Central Java (77 respondents). The quality of biofertilizers was tested in the laboratory based on microbial density and its functional (phenotypic) traits. The study showed that amongst various brands of biofertilizers commercialized, 41 brands of them have been officially registered as commercial products. Two brands of other biofertilizers found in agricultural shops were registered as organic or inorganic fertilizers. In general, each biofertilizer contained two or more microbial strains and was claimed to have multiple functions. However, most of them (>90%) were not labeled with expiry date information. Macronutrient contents (NPK) of some microbial carriers were almost equal to those of organic fertilizers. Around 38% of respondents in Bandung knew biofertilizers and less than 10% have ever used them. In Semarang, however, familiarity and personal experience of the respondents were much lower, i.e. 10% and 3%, respectively. About 67% and 50% of agricultural shops in Bandung and Semarang sold biofertilizers, respectively. Laboratory analyses showed that microbial density of five biofertilizers tested was lower than that of product specification, although most of them were positive for N-fixing and P-solubilizing traits. Some microbial strains contained less than 103 cfu based on the dilution level testing. These figures imply the urgent need to improve the existing quality standard system of biofertilizers including its control mechanisms.
Perbaikan Sifat Tanah dan Hasil Kedelai (Glycine max) dengan Pemberian Amelioran Biochar dan Pupuk Kandang di Lahan Sawah Tadah Hujan Setiari Marwanto; Ratri Ariani; Umi Haryati; Irawan Irawan
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 45, No 1 (2021)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v45n1.2021.59-67

Abstract

Abstrak. Lahan sawah tadah hujan menjadi salah satu alternatif dalam budidaya kedelai, namun hasil kedelai pada lahan sawah tadah hujan relatif rendah, salah satu penyebabnya diperkirakan adalah rendahnya kesuburan tanah. Perbaikan produktivitas tanah dan tanaman dapat dilakukan dengan pemberian bahan amelioran, antara lain arang biomassa (biochar) dan pupuk kandang (Pukan). Penelitian ini bertujuan untuk mengetahui pengaruh pemberian amelioran biochar dan Pukan terhadap sifat fisikokimia tanah dan hasil kedelai di lahan sawah tadah hujan. Penelitian dilaksanakan di Kabupaten Tulungagung, Jawa Timur pada dua musim tanam, tahun 2018 dan 2019 dengan perlakuan berupa: pupuk dosis petani (P1); pupuk dosis rekomendasi (P2); P1 + Pukan 10 t ha-1 (P3); P1 + biochar 10 t ha-1 (P4); dan P1 + Pukan 5 t ha-1 + biochar 5 t ha-1 (P5). Hasil penelitian menunjukkan bahwa penambahan biochar 10 t ha-1 dapat menurunkan bobot isi tanah, meningkatkan kandungan air tersedia, meningkatkan pH tanah, dan meningkatkan kandungan K dapat ditukar. Penambahan Pukan tidak memberikan pengaruh nyata terhadap sifat tanah, namun meningkatkan hasil kedelai. Penambahan biochar dan Pukan (P3, P4, P5) memberikan hasil biji dan brangkasan kedelai lebih tinggi 18-21% dibandingkan budidaya cara petani (P1). Hasil penelitian ini menegaskan kembali pentingnya penggunaan biochar dan Pukan dalam pengembangan komoditas kedelai di lahan sawah tadah hujan.Abstract. Rainfed paddy field is one of the alternative lands for soybean cultivation, but soybean yield is relatively low, seemingly due to low soil fertility. Soil and plant productivity could be improved by amelioration such as by using biochar and manure. This study aims to investigate the effetcs of biochar and manure on soil physicocemical characteristics and the yield of soybean in rainfed paddy field. This study was carried out in Tulungagung District, East Java Province, in two consecutive growing seasons of 2018 and 2019 with five treatments as follow: farmers’ fertilizer dosage (P1); recommended fertilizer dosage (P2); P1 + manure 10 t ha-1 (P3), P1 + biochar 10 t ha-1 (P4); and P1 + manure 5 t ha-1 + biochar 5 t ha-1 (P5). The results showed that the application of 10 t ha-1 biochar in association with farmer’s practice decreased soil bulk density, increased soil available water, increased pH, and increased exchangeable K. Manure application did not significantly improve soil properties, but increased soybean yield. Biochar and manure application (P3, P4, P5) increased grain and biomass yields of soybean 18-21% higher than those of farmers’ practice without soil ameliorant (P1). This study reemphasizes the importance of biochar and manure for soybeans production in rainfed paddy field.
Co-Authors Edi Husen Husen R.D.M. Simanungkalit RASTI SARASWATI Ratri Ariani Setiari Marwanto Umi Haryati