DINAMIKA UNSUR FOSFOR PADA TIAP HORISON PROFIL TANAH MASAM

Phosphorus is a macro essential nutrient for plants that are needed in large quantities third after Nitrogen and Potassium. Phosphorus acts as an activator of various plant metabolism enzymes and is a component of chlorophyll. Phosphorus is a necessary element in large amounts (macro nutrients), the amount of phosphorus in plants is smaller than nitrogen and potassium, but phosphorus is the key to plant life by absorbing phosphorus in the form of primary orthophosphate ions (H2PO4-) and secondary orthophosphate ions (HPO42-). In acid soils, the phosphate will be compounded in Al-P and Fe-P forms, whereas in alkaline soil, phosphate will be compounded with calcium as Ca-P forming a soluble complex compound. This research was conducted with the aim of evaluating the relationship and interrelations between the dynamics of phosphorus nutrients to some soil chemical properties on each acid soil profile horizon. This research was conducted in Laboratory of Soil Chemistry and Fertility Department of Soil Science and Land Resources Faculty of Agriculture, IPB. The soil samples used in this research were soil samples originating from the location of Neglasari Jasinga Bogor Village and Padasuka Village Maja Lebak District of Banten Province was taken per horison in soil profile. The results of the two land sites used showed that the dynamics of the availability of phosphorus nutrients. This dynamic was due to the presence of soil pH and aluminum solubility within each soil horizon. On the land profile of origin of Jasinga and lebak that the value of Al-dd would be high if the low soil pH value and available P value would be high if there was a decrease in soil pH value and the value of Al-dd soil.Keywords: acid soil, aluminum, phosphoru

SIFAT KIMIA ULTISOLS BANTEN AKIBAT PENGOLAHAN TANAH DAN PEMBERIAN PUPUK KOMPOS

ABSTRACTThe objective of this experiment were find out interaction effect between soil tillage and Compost dose to some chemistry properties of Ultisols Banten . The experiment was carried at the Kampung Baru Petir Serang Banten from June to September 2008, by using Randomized Block Design with factorial pattern and three replications. The first factor was soil tillage (one, two and three time tillage), and the second factor was compost dung (0; 10; 20; and ton ha-1). The data of experiment were analyzed by Fisher test and Duncan multiple range test =0,05 The result of experiment showed there was interaction effect between soil tillage and compost dosages only on the soil pH, but independently soil tillage and compost dosages application gave significant effect chemical properties ( C-Organic, and Nitrogen).Key words: Soil Tillage, Compost dung, Ultisol

PENGARUH PUPUK KOTORAN AYAM DAN BIOCAR ARANG SEKAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KANGKUNG DARAT (Ipomea reptans Poir) PADA MEDIA TANAH MASAM: THE EFFECT OF CHICKEN MANURE AND BIOCAR FERTILIZER ON THE GROWTH AND YIELD OF LAND SWEET SPINACH (Ipomea Reptans Poir) ON ACID SOIL

Acid soil status can affect the physical, chemical and biological properties of the soil which have an impact on plant growth, nutrient availability and damage microbial activity in the soil. This research aims to determine the response of land kale plants to the application of doses of chicken manure fertilizer and husk charcoal biochar on acid soil media. The study used a randomized block design (RCBD) with 2 factors. Chicken manure as the first factor with dosage levels, namely 0 t ha-1, 20 t ha-1, 40 t ha-1, and 60 t ha-1. The dosage of husk charcoal biochar as factor 2 is 0 t ha-1, 15 t ha-1, and 30 t ha-1. The results of the research showed that the treatment of chicken manure fertilizer with husk charcoal biochar had a very significantly different effect on the parameters of plant height and number of leaves at 21 and 28 DAP. From the research that has been carried out, chicken manure and husk charcoal biochar have an interaction on the leaf number parameter at 21 DA

Effects of ameliorant application on the growth and yield of rice plants (Oryza sativa L.)

An ameliorant is a chemical that can be used to improve soil fertility. The improving agents include dolomite and steel slag. Steel slag is a by-product of the steel industry containing CaCO3, SiO2, CaSiO3, and MgO, which can be used to improve the growth and yield of rice plants. Dolomite, on the other hand, is a limestone rock containing MgO and CaO, which is useful in agricultural soils. This study aimed to determine the types and doses of ameliorants affecting the growth and yield of rice plants (Oryza sativa L.). The research was carried out at Sukadana Village, Ciomas Serang-Banten District. A non-factorial Group Randomized Design with seven treatments was employed in this investigation. The treatments include P0 = No treatment (control), P1 = 2 t/ha of dolomite, P2 = 2 t/ha of dolomite + 2.5 t/ha of steel slag, P3 = 1.5 t/ha of steel slag, P4 = 2.5 t/ha of steel slag, P5 = 5 t/ha of steel slag, and P6 = 7.5 t/ha of steel slag. Observation was made on steel slag characterization, plant height, the total number of tillers, the weight of 1000 grains, the amount of grain per clump, and the weight of dry-milled grain. The results showed that applying dolomite at 2 t/ha and steel slag at 2.5 t/ha could increase the weight of 1000 grains of rice, and applying steel slag at 1.5 t/ha could enhance the amount of grain per clump

PERTUMBUHAN DAN HASIL TANAMAN JAGUNG MANIS (Zea mays saccharata Sturt) PADA BERBAGAI DOSIS PUPUK ORGANIK DAN INTENSITAS PENGOLAHAN TANAH ULTISOLS BANTEN

ABSTRACT This Research aim to to know sweet maize crop result and growth ( Zea Mays Saccharata Sturt.) At various organic manure dose and intensity processing of soil tillage,This research have been executed in kampong baru petir Banten. Research take place from June until September 2008. Research use Random Device of Group ( factorial RAK) Pattern, consisting of two factor and three restating, first factor is organic manure dose with four level that is, 0; 10; 20; and 30 ha-1 ton. Second factor is intensity processing of soil tillage with three level that is, once, twice, and thrice processing of soil tillage, so that there are 12 treatment combination and 36 set of attempt. Result of research indicate that organic manure dose differ reality, clean weighing of cob at organic manure dose 10 ha-1 ton equal to 1.386,8 g per check, organic manure dose 20 ha-1 ton equal to 1.316,27 g per organic manure and check 30 ha-1 ton equal to 1.393,83 g per check. Intensity Processing of soil tillage show to differ is not real and also  not happened interaction among organic manure dose with intensity processing of soil tillage.Key words: soil tillage, organic manure, Ultisol

PENGARUH PEMBERIAN DOSIS PUPUK ANORGANIK TUNGGAL N,P,K DAN JENIS PUPUK HAYATI TERHADAP PERTUMBUHAN DAN HASIL TANAMAN JAGUNG MANIS (Zea mays subsp. mays L.)

This study aimed to determine the effect of single dose of inorganic fertilizer N,P,K and the type of biological fertilizer on the growth and yield of sweet corn (Zea mays subsp. mays L.). The study was arranged in a randomized block design (RBD) with two factors. The first factor was the dose of single inorganic fertilizer N,P,K, which consisted of 3 levels: D1: 100%, D2: 75%, and D3: 50%. The second factor is the type of biological fertilizer, which consisted of 3 levels: P1: Sinarbio, P2: Kayabio, and P3: Ecofert. The results showed that the application of a single inorganic fertilizer N,P,K at a dose of 75% had a significant effect on the parameters of plant height, number of leaves, stem diameter, number of cobs planted, cob weight with cornhusk, cob weight without cornhusk, and yield potential. The type of biofertilizer Sinarbio has a significant effect on the parameters of plant height, number of leaves, stem diameter, number of cobs planted, number of cobs per plot, cob weight with cornhusk, cob weight without cornhusk, and yield potential. The use of a single dose of inorganic fertilizer N,P,K can be reduced to a dose of 75% of the recommendation for sweet corn plants with the application of biofertilizer Sinarbio

SEBARAN FRAKSI AL PADA PROFIL TANAH MASAM LAHAN KERING DI KABUPATEN LEBAK PROVINSI BANTEN

ABSTRACTThe toxicity of Al, Fe, and Mn is highly determined by the shape of the metalfractions. Therefore, the specific forms of Al, Fe, and Mn inside the soil are veryimportant to know because they are related to soil fertility. The purpose of this study was to determine the distribution of the Al fraction on the acid soil profile of dry land in Lebak Regency, Banten Province. This research was conducted from April to June 2019 in Maja District, Lebak Regency, Banten. The research was descriptive explorative with intentional sampling for special purposive sampling. The soil was tested with a main parameter using single extraction for Al Fractionation. The results showed that the Al fraction in amorphous form (Al-o) was more dominant than Al in dissolved form (Al-dd) in all horizon layers (0-120 cm). Moreover, the Al fraction in organic amorphous form (Al-p) was also more dominant than Al in the inorganic amorphous form (Al-po) at horizon layer of 0-15 cm, while at horizon laeyer of 15-120 cm the Al-po form was higher than Al-p. Al fraction in the form of organic amorphous had higher bond compared with Al form of organic amorphous in the soil layer of 0-120 cm.

PENGARUH PEMBERIAN BEBERAPA JENIS PUPUK KOTORAN HEWAN DAN KONSENTRASI AIR KELAPA TERHADAP HASIL TANAMAN TOMAT (Lycopersicum esculentum Mill.)

This research was aimed to know effect of some kinds of cow manures application and coconut water concentration to yield of tomato (Lycopersicum esculentum Mill). This research was conducted in the experimental farm Singamerta Institute for Agricultural Technology Banten. Starting from September until December 2013. The research used Randomized Completely Block Design, concisted of two factors. The first factors was the giving of cattles manures with three levels, they were : P0 (control), P1 (chicken manure) and (P2) cow manure. The second factor was coconut water concentration with four levels, they were: K0 (control), K1 (coconut water concentration 500 ml + water 500 ml), K2 (coconut water concentration 750 ml + water 250 ml ) and K3 (coconut water concentration 1000 ml). The result showed that the giving chicken manure gave the significant effect on number of fruits (4.53 fruit), the weight of fruits (84.63 g), diameter of fruits (28.16 mm). While the 1000 ml of coconut water concentration gave the significant effect on the weight of fruits (85.10 g) and the diameter of fruits (28.68 mm).Keywords: Coconut water, Cow manures, Tomato

EKSPLORASI POTENSI MIKROBA TANAH DALAM MENINGKATKAN HASIL PANEN KEDELAI (Glycine max) PADA LAHAN KERING

A research has been conducted to produce products of various microbial inoculants which synergistically function as a biological fertilizer and could improve soybean production on dry land, especially land that was marginal. Excavation of potential soil microbes on marginal dry land was conducted in Cibaliung District, Pandeglang Banten with a screening technique that had been tested in comparison with isolates that had been successfully tested its superiority. After proving the superiority of microbial synergism between multiple test isolates that had different roles in the transformation of nutrients, especially N and P. Microbial isolates demonstrated synergism effect formulated with a variety of carrier as inoculant products. In this research, isolation of microbes was conducted in the first year that was isolation of Azotobacter and Azospirillum with microbial enrichment with selective liquid media Ashby and Media Okon, BPF Pikovskaya media. The selection of microbial population density, which was aimed to produce a microbial consortium to produce microbes that work synergistically enhance the growth of plants was conducted in the second year. The experiment used a randomized completely block design (RCBD ) with a population density factor Azotobacter sp., Azospirillum and BPF: without treatment ( Z0, AZ0 and BP0) , 102cfu/ml (Z1 AZ1 and BP1), 104 cfu/ml (Z2, AZ2, and BP2 ), 106 cfu/ml (Z3, AZ3 and BP3), 108 cfu/ml (Z4, AZ4 and BP4) and 1010 cfu/1ml (Z5, AZ5 and BP5) soybean plants inoculated at the age of 2 M1ST repeated four times with further testing DMRT 5%. The parameters measured were: plant height, number of leaves, root length, leaf area, dry weight and root dry weight crown. Research showed that treatment of the various levels of population density Azotobacter sp. significantly effect on plant height, while density of population Azosprillium sp. significantly effect on plant height. BPF population density showed significant effect on the number of leaves.Key words: Soybean, Azospirillum, Azotobacter, and BP

Respons Nitrogen dan Azolla terhadap Pertumbuhan Tanaman Padi Varietas Mira I dengan Metode SRI

Penelitian ini dilakukan di Kampung Cisadap, Desa Bunter, Kecamatan Sukadana, Kabupaten Ciamis, Provinsi Jawa Barat dari Bulan Januarisampai Bulan Mei 2011 untuk mempelajari respons pertumbuhan tanaman padi yang diberi pupuk nitrogen dan Azolla michrophylla pada budidaya padi sawahSystem Of Rice Intensification . Penelitan ini menggunakan 5 dosis pupuk nitrogen (0 %, 25 %, 50 %, 75 %, 100 %) dari pupuk nitrogen yang direkomendasikan yaitu N 92 kg ha-1 (urea 200 kg ha-1), serta menggunakan Azolla michrophylla sebanyak 1,13 ton ha-1. Hasil penelitian menunjukkan bahwa pemberian dosis pupuk nitrogen sebanyak 50 % (100 kg ha-1) dan pemberian Azolla michrophylla sebanyak 1,13 ton ha-1 memberikan hasil yang baik pada parameter tinggi tanaman 2-6 MST, jumlah anakan 2-7 MST. Interaksi antara penggunaan dosis 50% pupuk nitrogen dan 1,13 Azolla michrophylla terjadi pada tinggi tanaman umur7 MST, dan bobot kering tanaman