scholarly journals The influence of urease and nitrification inhibitor on loss of N and oil palm harvest in peat

2020 ◽  
Vol 5 (2) ◽  
pp. 110
Author(s):  
Aldy Slamet Riyadi ◽  
Eka Tarwaca Susila Putra ◽  
Eko Hanudin
Keyword(s):  
Ammonium Sulfate ◽  
Oil Palm ◽  
Block Design ◽  
Research Result ◽  
Nitrification Inhibitor ◽  
N Fertilization ◽  
Single Factor ◽  
N Loss ◽  
Central Kalimantan ◽  
Industrial Oil

Oil palm is one of intensively planted in Indonesia, large-managed for industrial oil palm. This study aimed to know the influences of urease and nitrification inhibitor on loss of N and oil palm harvest in peat. The research was conducted at Sukamandang Village Coconut Plantation, Seruyan Tengah District, Seruyan Regency, Central Kalimantan Province. The research used a single factor of field experimental method with Randomized Completely Block Design (RCBD). Urea and ZA fertilizer were used in this study with the following treatment: N0= Without N, N1= Urea (195 kg.ha-1 N), N2= Urea + 0.12% NBPT-NPPT (195 kg.ha-1 N), N3= Urea (156 kg.ha-1 N), N4= Urea + 0.12% NBPT-NPPT (156 kg.ha-1 N), N5= Ammonium Sulfate (427 kg.ha-1 N), N6= Ammonium Sulfate + 0.8% DMPP (427 kg.ha-1 N), N7= Ammonium Sulfate (324 kg.ha-1 N), N8= Ammonium Sulfate + 0.8% DMPP (324 kg.ha-1 N). The research result indicated that the use of NBPT and DMPP inhibitors did not affect N levels in the leaves and the free fatty acids. Urea + NBPT treatment had no N loss for about 30%–50% which was lower than urea without N, whereas ammonium sulfate + DMPP had smaller N loss than all treatments without N fertilization. Fertilization using urea + NBPT and ammonium sulfate + DMPP increased the production of FFB and yield of oil palm.

scholarly journals Effects of Urease Inhibitor and Nitrification Inhibitor on the Nitrogen Losses, Physiological Activity, and Oil Palm Yield on Red-Yellow Podzolic

2019 ◽  
Vol 3 (3) ◽  
pp. 127
Author(s):  
Melisa Melisa ◽  
Eka Tarwaca Susila Putra ◽  
Eko Hanudin
Keyword(s):  
Oil Palm ◽  
Reductase Activity ◽  
Physiological Activity ◽  
Block Design ◽  
Nitrification Inhibitor ◽  
N Fertilizer ◽  
Fertilizer Efficiency ◽  
Urease Inhibitor ◽  
Single Factor ◽  
N Loss

Nitrogen (N) fertilizer efficiency can increase by adding N-(n-butyl) thiophosphoric triamide (NBPT) and N-(n-propyl) thiophosphoric triamide (NPPT) as urease inhibitor in urea fertilizer and adding 3,4-dimethyl pyrazole phosphate (DMPP) as nitrification inhibitor in ammonium sulfate (ZA) fertilizer. The research objectives were to examine the effectiveness of urease inhibitor (NBPT and NPPT) and nitrification inhibitor (DMPP) on the physiological activity and oil palm yield on red-yellow podzolic. Field experiment was done using a Randomized Complete Block Design (RCBD) of single factor and three replications as block. The single factor was nine fertilization treatments of urea with or without urease inhibitor, and ZA with or without nitrification inhibitor. The use of urease inhibitors decreases the amount of volatilization and N loss fertilizer. The higher dose of broadcasting N fertilizer (on the same type of fertilizer) resulted in the higher amount of N loss and volatilization. All fertilization treatments did not have any significant influence to the width and the length of opening stomata, nitrate reductase activity (NRA), N concentration in oil palm leaf, Oil Extraction Rate (OER), and Free Fatty Acid (FFA). Meanwhile, The oil palms at yellow red podzolic applied with urea 195 kg/ha combined with 0.12% of NBPT-NPPT resulting in higher fresh fruit bunch productivity.

scholarly journals EFFECT OF NATURAL HABITAT ON DIVERSITY OF HEMIPTERAN PREDATOR IN OIL PALM PLANTATION

2018 ◽  
Vol 18 (1) ◽  
pp. 75
Author(s):  
Akhmad Rizali ◽  
Toto Himawan ◽  
Ima Fitriani ◽  
Bambang Tri Rahardjo ◽  
Sri Karindah ◽  
...  
Keyword(s):  
Species Richness ◽  
Natural Enemies ◽  
Oil Palm ◽  
Natural Habitat ◽  
Research Result ◽  
Field Research ◽  
Observation Time ◽  
Natural Habitats ◽  
Central Kalimantan ◽  
Oil Palm Plantation

Effect of Natural Habitat on Diversity of Hemipteran Predator in Oil Palm Plantation. Utillization of natural enemies in controlling oil palm pests still encounters obstacles, in particular, how natural enemies can survive and establish in oil palm plantations. The existence of natural habitats around oil palm plantations can allegedly support the occurence of natural enemies. The objective of this study was to investigate the effect of the presence of natural habitats on diversity of hemipteran predators in oil palm plantations. Field research was conducted in oil palm plantations located in Pangkalan Bun, Central Kalimantan. The plots were oil palm plantations with different distances from natural habitat i.e. near (less than 200 m), medium (about 2 km) and far (about 5 km). Each plot was selected six trees for fogging using insecticide with active ingredient lamda cyhalothrin. Based on research result, diversity of hemipteran predator in oil palm plantion was found 19 species belong to 2 families. The most dominant hemipteran predator was Sycanus sp., Eocanthecona sp. and Reduviidae sp5. The distance of oil palm plantation from natural habitat did not affect species richness, abundance and composition as well as recolonization of hemipteran predator in oil palm plantation. Abundance of hemipteran predator tend to decrease in different observation time, except Sycanus sp. Sycanus sp was likely has ability to rapidly recolonized and their occurrence were influenced by flowering vegetation in oil palm plantation.

scholarly journals The Nitrification Inhibitor Vizura® Reduces N2O Emissions When Added to Digestate before Injection under Irrigated Maize in the Po Valley (Northern Italy)

Agronomy ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 431 ◽  
Author(s):  
Marcello Ermido Chiodini ◽  
Alessia Perego ◽  
Marco Carozzi ◽  
Marco Acutis
Keyword(s):  
Soil Depth ◽  
Cropping Systems ◽  
Pore Space ◽  
Block Design ◽  
Nitrification Inhibitor ◽  
N Fertilization ◽  
N2o Emissions ◽  
Air Samples ◽  
Po Valley ◽  
Randomized Block Design

The agricultural area in the Po Valley is prone to high nitrous oxide (N2O) emissions as it is characterized by irrigated maize-based cropping systems, high amounts of nitrogen supplied, and elevated air temperature in summer. Here, two monitoring campaigns were carried out in maize fertilized with raw digestate in a randomized block design in 2016 and 2017 to test the effectiveness of the 3, 4 DMPP inhibitor Vizura® on reducing N2O-N emissions. Digestate was injected into 0.15 m soil depth at side-dressing (2016) and before sowing (2017). Non-steady state chambers were used to collect N2O-N air samples under zero N fertilization (N0), digestate (D), and digestate + Vizura® (V). Overall, emissions were significantly higher in the D treatment than in the V treatment in both 2016 and 2017. The emission factor (EF, %) of V was two and four times lower than the EF in D in 2016 and 2017, respectively. Peaks of NO3-N generally resulted in N2O-N emissions peaks, especially during rainfall or irrigation events. The water-filled pore space (WFPS, %) did not differ between treatments and was generally below 60%, suggesting that N2O-N emissions were mainly due to nitrification rather than denitrification.

scholarly journals Response of irrigated wheat cultivars to different nitrogen rates and sources

2009 ◽  
Vol 33 (5) ◽  
pp. 1303-1310 ◽  
Author(s):  
Marcelo Carvalho Minhoto Teixeira Filho ◽  
Salatiér Buzetti ◽  
Marcelo Andreotti ◽  
Marco Eustáquio de Sá ◽  
Orivaldo Arf ◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Nitrification Inhibitor ◽  
N Fertilization ◽  
Wheat Cultivars ◽  
N Source ◽  
Randomized Block Design ◽  
Significant Difference ◽  
N Rates ◽  
Nitrogen Rates

High wheat yields require good N fertilization management. The objective of this study was to evaluate the effects of different N applications at sowing using Entec (N source with nitrification inhibitor) and urea (traditional N source) at covering, on four wheat cultivars. The experiment was conducted in a randomized block design in a factorial scheme, with four replications, at the Experimental Station of the Faculdade de Engenharia de Ilha Solteira - UNESP, on a dystrophic, epi-eutrophic alic Red Latosol with loamy texture, formerly under savannah vegetation. Four N rates (0, 60, 120, and 180 kg ha-1) were tested, applied at sowing in the case of Entec and top-dressed 40 days after plant emergence in the case of urea, and the four wheat cultivars E 21, E 22, E 42, and IAC 370. The yield of the wheat cultivars E 21 and E 42 was highest. Plant height and lodging index of cultivar E 22 were greatest, with consequently lowest grain yield. There was no significant difference between Entec (applied at sowing) and urea (top-dressed) in terms of grain yield and yield components. Nevertheless, urea resulted in a higher N leaf content, and Entec in a larger number of undeveloped spikelets. High nitrogen rates influenced the hectoliter mass negatively, affecting wheat grain quality. Grain yield increased under N rates of up to 82 kg ha-1 N, through Entec applied at sowing or top-dressed urea.

Sources and management of nitrogen before or after irrigation on the winter wheat and bean production

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Flávio Hiroshi Kaneko ◽  
Michelle Traete Sabundjian ◽  
João Paulo Ferreira ◽  
Douglas Castilho Gitti ◽  
Vagner do Nascimento ◽  
...  
Keyword(s):  
Grain Yield ◽  
Ammonium Nitrate ◽  
Ammonium Sulfate ◽  
Block Design ◽  
N Fertilization ◽  
Control Treatment ◽  
N Content ◽  
N Sources ◽  
Winter Crops ◽  
Polymer Coated Urea

Studies that demonstrate the effects of sources of nitrogen (N) applied before or after irrigation on the yield of winter crops are limited in literature. In this sense, the objective of this study was to compare the effect of sources of N applied immediately before or after 13 mm irrigation of wheat and bean winter crops. It was used a randomized complete block design, with 4 replicates, in a 5 × 2 + 1 factorial scheme, and 11 treatments consisted of five N sources: urea, polymer-coated urea, urea + ammonium sulfate, ammonium sulfate, and ammonium nitrate and a control treatment (without N fertilization). For wheat, although ammonium nitrate provided great N content in the leaves, the grain yield was lower due to the lodging of the plants; since the application of N either before or after irrigation did not influence the grain yield. Regarding the bean, N fertilization increased productivity, but there were no differences among N sources and, despite the greater N content in the leaves observed with the N supply before irrigation the greatest grain yield was observed when N was applied after the irrigation.

scholarly journals Penentuan Waktu Pemisahan Bibit Kembar Kelapa Sawit (Elaeis guineensis Jacq.) Asal Benih Multi Embrio di Pembibitan

2017 ◽  
Vol 17 (2) ◽  
Author(s):  
Yan Sukmawan
Keyword(s):  
Oil Palm ◽  
Elaeis Guineensis ◽  
Block Design ◽  
General Linear Model ◽  
Single Factor ◽  
General Linear Model Analysis ◽  
Randomized Block Design ◽  
Result Show ◽  
Elaeis Guineensis Jacq ◽  
Single Factor Experiment

The oil palm (Elaeis guineensis Jacq.) seed generally in form of germinated seed. Germinated seed purchased from oil palm seed producers often contained twin seedlings. The twin seedlings must be separated in pre-nursery before transplanted to the main-nursery. The aim of this research was to determine the best time of oil palm twin seedlings separation in nursery. The research was conducted on April to November 2016 in Politeknik Negeri Lampung. Single-factor experiment was arranged in randomized block design with three replications. The treatment was the age of twin seedling i.e.: 8 weeks after sowing (W1), 9 weeks after sowing (W2), 10 weeks after sowing (W3) and 11 weeks after sowing (W4). The data were analysed by general linear model analysis of variance (ANOVA). The means were separated using HSD at α=5% level. The result show the best time to separate the twin seedling in pre-nurserys is 9-11 weeks after sowing. Keywords: main-nursery, multi embryo, pre-nursery, twin seedlings

scholarly journals Test Frequency Optimization Using Single Factor ANOVA for Capacitive Oil Palm Fruit Ripeness Sensor

2020 ◽  
Vol 932 ◽  
pp. 012073
Author(s):  
Abdul Hallis Abdul Aziz ◽  
Siti Azura Abuzar ◽  
Mas Elyna Azol ◽  
Nurol Husna Che Rose ◽  
Rohaslida Liyana Mohmad
Keyword(s):  
Oil Palm ◽  
Test Frequency ◽  
Single Factor ◽  
Palm Fruit ◽  
Frequency Optimization

PERANAN TRICHOKOMPOS DAN PUPUK KCL DALAM MENGENDALIKAN PENYAKIT LAYU FUSARIUM PADA TANAMAN BAWANG MERAH DI TANAH BERPASIR (The Role of Trichokompos and KCL Fertilizer to Control Fusarium Will Disease on Onion in Sandy Soil)

AgriPeat ◽  
2019 ◽  
Vol 20 (01) ◽  
pp. 19-26
Author(s):  
Admin Journal
Keyword(s):  
Research Design ◽  
Fusarium Wilt ◽  
Sandy Soil ◽  
Incubation Time ◽  
Block Design ◽  
Wilt Disease ◽  
Single Factor ◽  
Fusarium Wilt Disease ◽  
Randomized Block Design

ABSTRACTThe role of Trichocompost and KCl fertilizer to control Fusarium wilt disease on onion in sandy soil. Fusarium wilt on onion is an interesting disease it is can loss the onion yield. The purpose of research to study trichocompost and KCl fertilizer role to control Fusarium wilt disease on ann onion. The research design used a Factorial Randomized Block Design with 2 factors. The first factor is 4 levels trichocompost, it is: without trichocompost (T0), trichocompost 10 t.ha-1 dosage (T1), trichocompost 20 t.ha-1 dosage (T2), trichocompost 30 t.ha-1 dosage (T3). The second factor is 3 levels KCl fertilizer, it is: without KCl (K0), KCl 100 kg.ha-1 dosage (K1), KCl 200 kg.ha-1 dosage (K2). Result of this research showed the application of trichocompost 10 t.ha-1 dosage and KCl 100 kg.ha-1 dosage can inhibit Fusarium wilt incubation time, can inhibit the patogen development with effective value 89,23%, the single factor it is aplication trichocompost 10 t.ha-1 dosage and trichocompost 30 t.ha-1 dosage not significant to dried onion bulb weight per clump of onion plant.Key words: Trichocompost, KCl fertilizer, Fusarium wilt disease, onion, sandy soil.ABSTRAKPenyakit layu Fusarium merupakan salah satu penyakit penting dapat menurunkan produksi bawang merah hingga 50%. Tujuan penelitian untuk mengetahui peranan trichokompos dan pupuk KCl dalam mengendalikan penyakit layu fusarium pada tanaman bawang merah. Penelitian menggunakan Rancangan Acak Kelompok faktorial dua faktor perlakuan. Faktor pertama 4 taraf dosis trichokompos yaitu: tanpa trichokompos (T0), trichokompos dosis 10 t.ha-1 (T1), trichokompos dosis 20 t.ha-1 (T2), trichokompos dosis 30 t.ha-1 (T3). Faktor kedua 3 taraf dosis pupuk KCl yaitu: tanpa pupuk KCl (K0), pupuk KCl dosis 100 KCl kg.ha-1 (K1), pupuk KCl dosis 200 KCl kg.ha-1 (K2). Hasil penelitian menunjukkan pemberian trichokompos 10 t.ha-1 dan pupuk KCl 100 kg.ha-1 dapat memperpanjang masa inkubasi penyakit, menekan serangan penyakit layu Fusarium dengan nilai efektivitas sangat baik (89,23%), perlakuan tunggal trichokompos dosis 10 t.ha-1 tidak berbeda nyata dengan dosis 30 t.ha-1 terhadap bobot umbi kering per rumpun tanaman bawang merah.Kata kunci: penyakit layu Fusarium, pupuk KCl, tanah berpasir, tanaman bawang merah, trichokompos.

scholarly journals Production of cabbage grown in pots containing legumes' root and shoot

Revista CERES ◽  
2012 ◽  
Vol 59 (5) ◽  
pp. 689-694 ◽  
Author(s):  
Thiago de Oliveira Vargas ◽  
Ellen Rúbia Diniz ◽  
Ricardo Henrique Silva Santos ◽  
Alysson Roberto de Almeida ◽  
Segundo Urquiaga ◽  
...  
Keyword(s):  
Block Design ◽  
Mineral Fertilizer ◽  
Dry Weight ◽  
N Fertilization ◽  
Recommended Dose ◽  
Legume Species ◽  
Mineral Fertilization ◽  
Mineral N ◽  
Plant Parts ◽  
Whole Plant

Roots effect is not generally considered in studies assessing the performance of crops in response to green manuring. However, such effect can contribute to a better understanding of crop rotation. The aim of this study was to assess the effect of root and shoot of two legumes on the production of cabbage. The experiment was conducted in pots of 10 liters containing substrate of 2:1 soil/sand. The experiment was arranged in a factorial scheme (2x3 + 2) in a randomized block design with five replicates using two legume species (Crotalaria juncea L. and Canavalia ensiformis L), three plant parts (root, shoot, or whole plant), and two additional treatments (mineral fertilization with 100% and 50% of the recommended dose of N for growing cabbage). Pots with legume treatments received mineral fertilizer with 50% of the recommended dose of N for growing cabbage. The experimental plot consisted of a pot containing one plant of cabbage. Legumes were grown in pots and harvested at 78 days. The root biomass was determined in extra pots. Production was assessed using head fresh and dry weight. The application of the whole plant of both legume species reduced cabbage production. However, root or shoot of both legume species was equivalent to 50% of mineral N fertilization required for the cultivation of cabbage.

scholarly journals Total and heterotrophic soil respiration in a swamp forest and oil palm plantations on peat in Central Kalimantan, Indonesia

2017 ◽  
Vol 135 (3) ◽  
pp. 203-220 ◽  
Author(s):  
Kristell Hergoualc’h ◽  
Dede T. Hendry ◽  
Daniel Murdiyarso ◽  
Louis Vincent Verchot
Keyword(s):  
Soil Respiration ◽  
Oil Palm ◽  
Swamp Forest ◽  
Central Kalimantan ◽  
Heterotrophic Soil Respiration
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