Slamet Minardi

REKAYASA FORMULA PUPUK SUPER ORGANIK DALAM PENERAPANNYA PADA BUDIDAYA TANAMAN SAYURAN BAYAM (Amarantus sp)

The decline of soil organic matter in the low of soil productivity. To increase soil of productivity and returns back bearing capacity of the plant, then the business can be done for example by encouraging re-use of organic fertilizers. The study titled “Engineering super organic fertilizer formula in vegetable cultivation on spinach ( Amaranthus sp) aims to a). getting a super-organic fertilizer formula, the most good, b). knowing the influence of various super organic fertilizer formula on growth and yield of vegetable Amaranthus sp. The experiment was conducted from April to November 2010. Five kinds of super-organic fertilizer, which is an engineering formula fertilizer that s made from a mixture of manure, sawdust, dolomite, rock phosphate, molasses and starch in the form of granules, making it easier in applying and provide with the same dose. As ground control does not super plus organic fertilizer. Research using Randomized Complete Block Design (RAKL) single factor. The observed variables are observed 1. Independent variables: a. Without organic fertilizer and b. The use of super-organic fertilizer formula 2. Dependent variables include soil chemical properties (properties which are used as a determinant of soil fertility), which consist of: soil pH, soil organic matter content (organic C), cation exchange capacity (KPK), Burnout base (KB), and P is available, and growth spinach plants. The results showed that: super organic fertilizer formula is best P5G2 (mixture of manure, rock phosphate and dolomite with starch adhesive), proved its influence on growth and yield of spinach, either on plant fresh weight, dry weight, root volume and uptake of N gave the highest yield compared with other treatments.

Zero Point of Charge of Various Organic Fertilizer : The Effect on Soil Cation Exchange Capacity in Degraded Lands

Zero Point of Charge (ZPC) is an important variable in describing the mechanism of reversible surface charge primarily on weathered soil dominated by variable charge. ZPC is a certain pH when the surface charge is electrically neutral or zero (pHo). The presence of organic matter effect on the nature of the charge in the soil. Research goals include: 1). Obtaining information kinds of organic fertilizer with low of pHo, 2) Knowing the behavior of pHo and net charge of soil, 3) Knowing the influence of pHo on the soil cation exchange capacity. This study is an experimental functional relationship variables approach through experiments. The experiments were conducted at Greenhouse of Agriculture Faculty, Sebelas Maret Univercity. The basic design used was completely randomized design of a single factor. The treatment is done as follows: P0 = soil without the addition of organic fertilizers, P1 = soil with the addition of cow manure 5 tons / ha, P2 = soil with the addition of chicken manure 5 tons / ha, P3 = soil with the addition of quail manure s 5 tons/ ha, P4 = soil with the addition of goat manure 5 tons / ha, P5 = soil with the addition of bokashi 5 tons / ha, P6 = soil with the addition of rice straw compost 5 tons / ha, P7 = soil by adding compost hyacinth 5 ton / ha. P8 = soil by adding compost of Titonia 5 tons / ha and each treatment was repeated 3 times. Analysis of the quality of organic fertilizers include: levels of lignin and polyphenols, C/N, pH , pHo, humic acid and fulvic acid. The soil analysis includes the C-organic soil, total N, C / N, pH , pHo, CEC. The results showed that the zero point of charge (pHo) is the lowest organic fertilizer chicken manure (4.52). Obtained a close relationship between the difference in pH H2O with pHo with cation exchange capacity. Highest cation exchange capacity achieved in the treatment of chicken manure.

Pengaruh Bahan Organik dan Pupuk Fosfor terhadap Ketersediaan dan Serapan Fosfor pada Andisols dengan Indikator Tanaman Jagung Manis (Zea mays saccharata strurt)

Title : The Effect of Organic Matter and Phosphor Fertilizer to Availability and Absorption of Phosphor with Sweet Corn Plant ( Zea mays saccharata strurt ) Indicator. This research purposes was to find out the effect of the kinds of organic sources and P fertilizer to the availability and absorption of phosphor in Andisols and to find out kinds of organic sources and P fertilizer dosage that can give the highest of availability and absorption of phosphor in Andisols. This research was conducted in Green House and Chemistry and Soil fertility Laboratory of Agriculture Faculty of Sebelas Maret University from June 2005 until January 2006. This research used Factorial Randomized Complete Design with two factors. The first factor was P0 (without P fertilizer), P1 (100 kg/ha P2O5) and P2 (100 kg/ha P2O5), the second factor consist of B0 (without organic matter), B1 (Gliricida sepium 10 ton/ha), B2 (rice stalk 12 ton/ha) and B3 (manure 14.25 ton/ha). They are 12 treatments that be repeated three times. Data were analyzed with F-test or Kruskal-Wallis test 1% and 5% was used to know the effect of treatment on experimental result. Duncan multiple range test 5% is used for comparing inter-treatment. For finding out the relation between primary dependent variable and secondary dependent one it is used correlation test. The result of research shows that the organic matter and P fertilizer appliances have very significant effects to the availability of phosphor in Andisols and the absorption of P by the plant. The rice stalk appliance 12 ton/ha with P fertilizer 100 kg/ha P2O5 (P2B2) gives the highest availability of phosphor; that is 24.67 mg/kg. The highest absorption of P can be found at the manure appliance 14.25 ton/ha and P fertilizer 100 kg/ha P2O5 (P2B3); that is 2.24 mg. Keywords: Andisols, available-P, organic matter, P fertilizer

Kajian Efektifitas Penghambatan Nitrifikasi pada Rhizosphere Berbagai Spesies Tanaman Brachiaria di Alfisols

Title : Study on Effectiveness of Nitrification Inhibition in Rhizosphere of Brachiaria species on Ultisol. It has been known for some plant species Brachiaria (Brachiaraia decumbens, Brachiaria humidicola , and Brachiaria brizantha ) that have been studied has been hoen to effectively inhibit nitrification from that rhizosphere activity. Therefore it is necessary to further resarch the cultivation of other plant Brachiaria species such as Brachiaria mutica , Brachiaria decumbens and Brachiaria humidicola, to determine the effectiveness as a barrier to the rate of nitification that carried out by the method of pot experiments with functional relationship variables approach based on sampling and nondestructif Completely Randomized Design ( CRD ) consisting of plant species Brachiaria factor . and various doses of N fertilizer is 100 kg / ha , 150 kg / ha , 200 kg / ha . Results of this study indicate that 1 ) Brachiaria mutica , Brachiaria decumbens and Brachiaria humidicola , very significant on nitrification potential , but the treatment of a wide range of doses of fertilizer N is not a real effect on nitrification potential . 2 ) Highest nitrification potential value in the treatment Brachiaria mutica in the amount of 5,114 mg NO2- / g soil /5hour , while the lowest value of the potential nitrification in plants Brachiaria humidicola is equal to 0,414 mg NO2- / g soil /5hour . 3 ) Of the three treatment plants Brachiaria sp . in that the treatment plant can Brachiaria humidicola considered the most effective in inhibiting nitrification.

Efisiensi Serapan P dan Hasil Tanaman Padi (Oryza Sativa L.) pada Berbagai Imbangan Pupuk Kandang Puyuh dan Pupuk Anorganik di Lahan Sawah Palur Sukoharjo (Musim Tanam II)

Title : Efficiency of P Up Take and The Yield of Rice Plant ( Oryza sativa L.) with Quail Manure and Inorganic Fertilizer at Paddy Soil, Palur, Sukoharjo (Season II). This research was conducted on January-August 2008. Used Randomized Completely Block Design (RCBD) that arranged in factorial with two factors. The first factor was 3 levels of inorganic fertilizer dosage i.e.: without inorganic fertilizer (A1), urea dosage 150 kg.ha-1, SP-36 dosage 75 kg.ha-1, KCl dosage 50 kg.ha-1, and ZA dosage 50 kg.ha-1 (A2), urea dosage 300 kg.ha-1, SP-36 dosage 150 kg.ha-1, KCl dosage 100 kg.ha-1, and ZA dosage 100 kg.ha-1 (A3). And second factor were 3 levels of quail manure dosage i.e.: without quail manure (O1), quail manure dosage 3 Mg.ha-1 (O2); quail manure dosage 6 Mg.ha-1 (O3). Statistical analysis that used was F test or Kruskal-Wallis test, Duncan Multiple Range (DMR) test at 5% in level, and Correlation test. The research result showed that the highest P uptake efficiency, agronomy efficiency, and the grain dry weight was achieved on 50% of inorganic fertilizer recommendation dosage (urea dosage 150 kg.ha-1, SP-36 dosage 75 kg.ha-1, KCl dosage 50 kg.ha-1, and ZA dosage 50 kg.ha-1) and 6 Mg.ha-1of quail manure treatment (A2O3) in mount of 38.83%, 30.40%, and 6.22 Mg.ha-1 respectively. P uptake efficiency in that treatment was increased as much 13.83% than the same treatment in session I. Generally, the grain dry weight on season II lower than season I. The significant decrease in mount of 2,33 Mg/ha-1 found on treatment of inorganic fertilizer present in 50% of recommendation dosage (urea dosage 150 kg.ha-1, SP-36 dosage 75 kg.ha-1, KCl dosage 50 kg. ha-1, and ZA dosage 50 kg.ha-1) and 3 Mg.ha-1 of quail manure treatment (A2O2). Keywords: quail manure, inorganic fertilizer, uptake efficiency, the dry grain weight paddy

Efek Perimbangan Pupuk Organik dan Pupuk Anorganik terhadap Sifat Kimia Tanah Andisol Tawangmangu dan Hasil Tanaman Wortel (Daucus carota L.)

Title : Effects of Balance Organic and Inorganic Fertilizer on the Andisols Soil Chemistry at Tawangmangu to Yield of Carrot ( Daucus carota L.). This research was carried out from August 2008 to February 2009. The purpose of this research were to know the effect of litter quality of Gliricidia maculata and Salacca edulis to inhibition of nitrification and efficiency N benefit in Alfisols. This research were conducted in Blumbang, Sub district Tawangmangu, Karanganyar Regency. The aim of this research to know the effect of balance organic fertilizer and inorganic fertilizer to Andisols soil chemistry at Tawangmangu. This research was experimental research which is used RCBD (Randomized Complete Block Design) with single factor: trial pattern P1 (0% organic fertilizer + 0% inorganic fertilizer), P2 (50% inorganic fertilizer), P3 (100% inorganic fertilizer), P4 (50% organic fertilizer), P5 (50% organic fertilizer + 50% inorganic fertilizer), P6 (50% organic fertilizer + 100% inorganic fertilizer), P7 (100% organic fertilizer), P8 (100% organic fertilizer + 50% inorganic fertilizer), P9 (100% organic fertilizer + 100% inorganic fertilizer). Statistical analysis to test about treatment influence used F-test and Kruskal-wallis test, for comparing inter-treatment used Duncan Multiple Range Test (DMRT) and Mood Median, for finding out of the relation inter-variable it is used correlation test. The result of the research shows that the balance of organic fertilizer and inorganic fertilizer give significant effect to increase total N soil, available N soil, Cation Exchange Capacity (CEC), and pH H2O, but it has not significant effect to total P soil, available P soil, total K soil, available K soil, pH NaF, Base Saturation (BS), and Organic Matter. The Highest total N soil was 0,56% with increased percentage 38.8% from control and CEC was 28.08 me%, increased 4.87 me% from control in balanced 100% organic fertilizer and 100% inorganic fertilizer, affected to yield of carrot was 138.5 g increased 27.3 g (24.5%) from control. Keywords: Organic fertilizer, Inorganic Fertilizer, Andisols, Soil Chemistry, Carrot

Residual Effect of Organic Fertilizer Utilization and Addition of Urea Fertilizer on The Yield of Corn on The C-Excavation Paddy Soil

The purposes of this study were to determine the effect of organic fertilizer residues and addition of urea fertilizers in improving soil fertility in the C excavation paddy soil and the yield of corn (Zea mays, L). Research was conducted by using completely randomized design (CRD) single factor, consisting of six treatments, as follows, P0: Control, residue treatment of : inorganic fertilizer (P1), Cow manure (P2), Bokhasi fertilizer (P3), manure and inorganic fertilizer (P4), Bokhasi and inorganic fertilizer (P5). Urea fertilizer was added a quarter of recommended dose for each treatment residue. It was given twice, except for the control treatment, and repeated 4 times, and placed randomly. Observations of soil chemical properties comprising: soil pH, C-organic, BS, CEC and the N-total crop land, while parameters of the plants, including components of the growth and yield of corn, were also observed. The results showed that the residue of organic fertilizer and the addition of urea fertilizer were able to increase the fertility of the C-excavation paddy soil. It has been proved by the growth and yield of corn were increased, such as plant height, fresh and dry weight of plant, weight and girth of the highest cob. Residual treatment obtained from the treatment of organic and inorganic fertilizer showed significantly different with the addition of urea fertilizer, as compared to control, however it showed not significantly different to other treatments.