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Chemical Properties of Inceptisol and Rice Yields Applied with Mixed Source Fertilizer (MSF)

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Chemical Properties of Inceptisol and Rice Yields Applied with Mixed Source Fertilizer (MSF) Available online at: http://journal.unila.ac.id/index.php/tropicalsoilJ Trop Soils, Vol. 23, No. 1, 2018: 1-9 1 DOI: 10.5400/jts.2018.v23i1.1-9 Chemical Properties of Inceptisol and Rice Yields Applied with Mixed Source Fertilizer (MSF) Jauhari Syamsiyah1*, Sumarno1, Suryono1, Winda Sari2 and Muhammad Anwar2 1Department of Soil Science, Faculty of Agriculture, Sebelas Maret University, Indonesia 2Alumni of Department of Soil Science, Faculty of Agriculture, Universitas Sebelas Maret, Indonesia *e-mail: [email protected] Received 14 June 2017/ accepted 28 December 2017 ABSTRACT One effort that can be done to improve soil fertility and crop yields is fertilization. Fertilization using a mixed source fertilizer (MSF) is an option to overcome the impact of inorganic fertilizer use and organic fertilizer drawbacks. This study aims to evaluate the effects of MSF application on the chemical properties of Inceptisol and rice yields. A field experiment was conducted using a completely randomized block design (RCBD) with two factors and three replications. The first factor was the three formulas of MSF (F1, F2, F3) and the second factor was MSF doses (0, 2.5, 5, 7.5, 10 Mg ha-1). The results show that there is no significant difference on the total soil N, available soil P, plant height and total number of tillers of rice plants applied with the three MSF formulas. The increased MSF doses applied significantly improve the soil chemical properties of Inceptisol and rice yields. The application of 10 Mg ha-1 MSF increases total- N (57.89%), available-P (29.13%), exchangeable-Ca and -Mg (117% and 250%, respectively), plant height (40%) and total number of tillers (43.2%) in comparison to those without MSF application. There are interaction effects between formulas and doses of MSF on the amount of exchangeable-K, organic-C content, and CEC of the soil and rice yields. The application of 10 Mg ha-1 MSF F3 results in better effects on the amount of exchangeable-K, organic-C content and CEC of the soil, and number of productive tillers and rice yields than the application of other MSF formulas. The MSF can be used as an alternatif fertilizer that can improve Inceptisol productivity. Keywords:Inceptisol, organic farming, rice, soil chemical properties ABSTRAK Salah satu upaya untuk meningkatkan kesuburan tanah dan hasil tanaman adalah dengan pemupukan. Pemupukan dengan campuran sumber pupuk organik dan anorganik dilakukan untuk mengatasi dampak penggunaan pupuk anorganik serta kendala pupuk organik. Penelitian ini bertujuan untuk mengkaji berbagai sifat kimia tanah dan hasil padi pada tanah Inceptisol yang diberi campuran sumber pupuk. Penelitian lapangan ini menggunakan rancangan acak kelompok lengkap (RAKL) dengan dua faktor perlakuan dan tiga ulangan. Faktor pertama adalah 3 formula campuran sumber pupuk Mixed Source Fertilizer (MSF) (F1, F2, F3) dan faktor kedua adalah dosis MSF (0; 2,5; 5; 7,5; 10 Mg ha-1). Hasil penelitian menunjukkan bahwa tidak ada perbedaan N-total, P-tersedia, C-organik, KTK, Ca dapat ditukar pada tanah yang diaplikasikan dengan 3 formula MSF. Peningkatan dosis MSF nyata meningkatkan sifat kimia tanah dan hasil padi. Aplikasi MSF pada dosis 10 Mg ha-1 mampu meningkatkan N-total (57,89%), P- tersedia (29,13%), Ca dan Mg dapat ditukar (117% dan 250 %), tinggi tanaman (40%) dan total jumlah anakan tanaman padi (43.2%) dibandingkan tanpa aplikasi MSF. Terdapat pengaruh interaksi antara formula dan dosis MSF terhadap K dapat ditukar , C-organik, KTK dan hasil padi. Pemberian 10 Mg ha-1 F1 memberikan hasil yang superior dibandingkan perlakuan lain pada K tertukar, C-organk dan CEC, jumlah anakan produktif dan hasil padi. MSF adalah pupuk alternatif yang dapat digunakan untuk meningkatkan produktivitas tanah Inceptisol. Kata kunci: Inceptisol, dosis pupuk, pertanian organik, padi, sifat kimia tanah J Trop Soils, Vol. 23, No. 1, 2018: 1-9 ISSN 0852-257X 2 J Syamsiah et al.: Chemical Properties of Inceptisol and Rice Yields INTRODUCTION the best effects in improving Inceptisol fertility status and rice yields. Inceptisol is potential to be developed as agricultural land, because it is widely spread in MATERIALS AND METHODS Indonesia, covering of 70.25 million ha of land (Puslittanak 2000; Muyassir et al. 2012). However, Study Site the low contents of organic-C, N, P, and K (Tuherkih A field experiment was conducted on an and Sipatuha 2009) are the challenges in developing Inceptisol in Karanganyar, Central Java, Indonesia the Inceptisol as agricultural land, or in other words the fertility status of Inceptisol is low (Abdurrahman in April until December 2016. et al. 2008). Therefore, in order to improve the Research Design productivity of Inceptisol, a proper fertilization is required. The experiment was arranged in a Completely Recently, farmers tend to use inorganic Randomized Block Design (RCBD) with two factors fertilizer continuously for the cultivation. The use and three replications. The first factor was the three of inorganic fertilizers in a relatively high amount formulas of mixed source fertilizer (MSF), namely and the use of unbalanced nutrients can decrease F1 (50% quail manure, 20% rock phosphate, 18% soil fertility status, so the productivity of soil is coconut husk ash, 6% dolomite, 1% sulfuric element, less optimum (Khairatun et al. 2013). In addition, 5% feldspar), F2 (60% quail manure, 20% rock the excessive use of chemical or inorganic phosphate, 14% coconut husk ash, 6% dolomite, 1% fertilizers has forced the Indonesian government sulfuric element) and F3 (20% quail manure, 30% to keep subsidies on fertilizers (Idris 2017) and Azolla, 16% rock phosphate, 23% coconut husk ash, also has caused environmental pollution both 10% dolomite, 1% sulfuric element). The second during its manufacturing processes (Mirlean and factor was 5 doses of MSF namely D0 (no fertilizer), Roseinberg 2006; Kassir et al. 2012) and its use D1 (2.5 Mg ha-1), D2 (5 Mg ha-1), D3 (7.5 Mg ha- (Suharsih et al. 2002) 1), and D4 (10 Mg ha-1). Each MSF formula was On the other hand, farmers tend to ignore in made by mixing all the ingredients including utilizing organic fertilizers. This is due to the organic composted Azolla, matured quail manure, phosphate fertilizer has a low nutrient content so that the rock, sulfur and feldspar (from Banjarnegara) and farmers need it in a large amount to maximize the filtered coconut husk. All the ingredients were mixed crop yields, consequently, the transportation cost homogeneously according to the doses. of the fertilizer becomes high (Sentana 2010). In addition, the organic fertilizer is known as a slow Soil Chemical Analysis release fertilizer so it would take a longer time to The soil samples were taken before and after be available in soil for plant uptake (Brady and the experiment then the soil samples were analyzed Weil 2008). in the Laboratory of Soil Chemistry and Soil Fertility, Therefore, to overcome the problems Faculty of Agriculture, Sebelas Maret University. mentioned above (especially in using whether The soil characteristic including total-N (Kjedhal), organic or inorganic fertilizers), looking for natural available-P (Bray 1), exchangeable-K (NH OAc 1 resources that have high nutrient content, such as 4 N pH 7), organic-C (Walkley and Black) and Cation N from Azolla and quail manure, P from phosphate Exchange Capacity (CEC) (NH OAc 1 N pH 7) rocks, K from coconut shell and feldspar rocks, Ca 4 were determined. and Mg from dolomite and S from sulfuric rocks, can be an option in which those natural resources Rice Planting are further mixed together to become a kind of fertilizer. It is expected that this mixture could give The IR 64 variety (in accordance with the positive impacts in increasing the soil fertility status variety of rice plant used by farmers around the and productivity of agricultural land (Roidah 2013). study site) were germinated in a plot. After 21 days A pot experiment conducted in the study of of seed planting, the rice seedlings were transplanted Sumarno (2015) indicated that the application of the with spacing of 25cm x 25cm in a plot with the size three formulas of fertilizers showed a significant of 2m x 3m. The MSF was applied along with the effect on the growth of mustard and shallot. preparation of the land by the local farmers. The Therefore, a field experiment was conducted in the data of plant parameters were collected from 5 plant current study as a further study to obtain a formula samples per plot. The plant height was measured of mixed source fertilizer (MSF) that can result in started from soil surface to the end of the longest J Trop Soils, Vol. 23, No. 1, 2018: 1-9 3 Table 1. Characteristics of Inceptisol from Karanganyar, Central Java. Soil Properties Unit Value Category* pH H2O - 5.5 Acid Organic-C % 1.16 Low CationExchange Capacity cmol (+)kg-1 10.4 Low Total-N % 0.1 Low Available-P ppm 1.9 Very low Exchangeable-K cmol(+)kg-1 0.1 Low Exchangeable-Ca cmol (+)kg-1 1.06 Exchangeable-Mg cmol (+)kg-1 2.69 Exchangeable-Na cmol (+)kg-1 0.33 *) Based on the category proposed by Soil Research Institute (1983). leaf at the maximum vegetative growth of rice of Tisdale et al. (2010) suggested that organic plants. The number of tillers, number of productive matter is a source of nutrients N, P, and S for plants tillers, and rice yields were also recorded. and the source of negative charges that can affect The data were analyzed using one-way the soil CEC (Brady and Weil, 2008; Suntoro 2013). ANOVA test followed by Duncan’s Multiple Range The organic-C contents of the three MSF Test at 5% level (p<0.05) to compare the average formulas are quite high and meet the criteria of the values obtained from each treatment.
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