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All Journal Journal of Tropical Soils Jurnal Agroekoteknologi Unri Conference Series: Agriculture and Food Security Dinamika Lingkungan Indonesia EcoNews Dinamika Pertanian
Idwar, ,
Departemen Of Agrotechnology, Faculty Of Agriculture, Riau University, Pekanbaru, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Immunology & microbiology

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Digital Analyses of Landsat ETM+ for Identify Agroforestry System in Riau Besri Nasrul; . Idwar
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.81-87

Abstract

The objectives were to identify land characteristics of agroforestry system that influencing its benefit value, and to compile criteria of site specific. Location were identified by the Landsat 7 ETM+ that designed in the landuse utilization type: rubber agroforestry is identified by cyan old (RGB pixel 143,37; 173,04; 96,03) and palm oil agroforestry is identified by varying bright green-green (red-green-blue pixel 33-145; 142-253; 46-139). In each the landuse utilization type done by measurement of land characteristics, cost the inputs, and price the benefits. The maximum likelihood classification system is used for classification; the benefit value were calculated by benefit-cost ratio; the suitability criteria of site spesific were compiled by cluster analysis. The economic suitability criteria of rubber are: I (4,18-3,94); II (3,94-3,15); III (3,15-2,73); IV (2,73-2,31), the economic suitability criteria of palm oil are: I (3,30-2,72); II (2,72-2,07); III (2,07-1,38); IV (1,38-1,18), and would be base saturation, exchangeable Ca, and Mg. These criteria can be used to evaluate of suitability for the agroforestry system rubber and palm oil in Riau.
PEMANFAATAN KOMPOS TANDAN KOSONG KELAPA SAWIT DENGAN BAKTERI SELULOLITIK DAN LIGOLITIK SERTA NPK TERHADAP PERTUMBUHAN BIBIT KAKAO (Theobroma cacao L.) Isna Rahma Dini; Idwar Idwar; Amir Franky Simamora
Jurnal Agroekoteknologi Vol 11, No 1 (2019)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotek.v11i1.7621

Abstract

ABSTRACTCocoa (Theobroma cacao L.) is one of the large plantations after oil palm. Theincrease in cocoa nursery can be accompanied by the utilization of waste derivedfrom palm oil, namely oil palm empty fruit bunches (OPEFB). oil palm emptyfruit bunches can be useful as organic fertilizer because it can improve soilphysical, chemical and biological properties. The use of OPEFB as organic fertilizer will also reduce excessive use of NPK. Utilization of OPEFB into organic fertilizer can be in the form of compost or raw OPEFB organic matter plus cellulolytic and lignolytic microbes. This study aims to determine the effectof NPK fertilizer and OPEFB compost on the growth of cocoa seedlings. Thisresearch was conducted experimentally using a completely randomized designconsisting of nine treatments and three replications. Parameters of observationwere plant height, stem diameter, number of leaves, root canopy ratio, dry weight of seedlings and age of planting. The results showed that the provision of 100 g polybag-1 OPEFB compost plus 50% NPK fertilizer (2 g polybag-1) could provide good growth in cocoa seeds (Theobroma cacao L.).
Optimalisasi Pemanfaatan Lahan Marginal Kering untuk Budidaya Padi Gogo di Riau Idwar Idwar; Anthony Hamzah; Besri Nasrul
Unri Conference Series: Agriculture and Food Security Vol 1 (2019): Seminar Nasional Pembangunan Pertanian dan Pedesaan
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.306 KB) | DOI: 10.31258/unricsagr.1a25

Abstract

Ketersediaan lahan untuk usaha pertanian merupakan syarat mutlak untuk mewujudkan swasembada, ketahanan, mandirian, dan kedaulatan pangan nasional. Lahan marginal kering berpotensi mendukung peningkatan produksi padi nasional. Keberadaannya menjadi solusi optimalisasi lahan kering sebagai pengganti lahan sawah yang terkonversi. Upaya menggalakkan budidaya padi gogo berpeluang besar dalam peningkatan produksi padi di Riau karena telah dibudidayakan masyarakat secara turun temurun. Budidaya padi gogo di Provinsi Riau umumnya diusahakan pada lahan marginal kering (Inceptisol, Ultisol), yang kendala utamanya adalah ketersedian air yang terbatas, kesuburan tanah rendah (terutama P terikat kuat oleh aluminium sehingga tidak tersedia), dan bahan organik rendah. Berbagai penelitian yang andal pada beberapa kondisi ketersedian air, penggunaan varietas ungggul dan dengan menerapkan teknologi tepat guna berupa pemberian bahan amelioran telah dapat mengoptimalkan pemanfaatan lahan marginal kering dan meningkatkan produktifitasnya. Selanjutnya untuk keberlangsungan budidaya padi gogo di lahan marginal kering tergantung pada konsistennya pemerintah pusat maupun daerah dalam menerapkan UU Nomor 41 Tahun 2009 tentang Perlindungan Lahan Pertanian Pangan Berkelanjutan.
Perubahan Sifat Fisik Kimia Tanah Sebagai Dampak Kebakaran Lahan Gambut Kebun Sawit T Abu Hanifah; Sofia Anita; Idwar Idwar
Dinamika Lingkungan Indonesia Vol 10, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/dli.10.1.p.29-33

Abstract

Based on the survey results in the last seven years (2010 - 2017), palm plantations in the Pakning Asal area, Bengkalis Regency experienced fires with different frequencies. Some lands that not burned, once burned and several times burned. The burned areas can affect the composition and nutrient content of the soil. Burning peatlands cause irreversible drying due to the heating of the peat. This study aimed to analyze the effect of fires with different frequencies on the total Fe, Al, Mo and C/N content. Total Al and Mo content was determined using Atomic Absorption Spectrophotometer. The total Fe and C content was analyzed using UV-Vis Spectrophotometer. Total N was analyzed using the Kjeldahl method. The results showed that the total Fe, Al, and Mo content increased in the soil burned once and the C/N ratio increased with the increasing frequency of fires. The total Fe, Al, and Mo content in the soil burned once was 69.20 mg/Kg, 33.83 mg/Kg, 2.16 mg/Kg and the C/N ratio increased from 16.51 to 25.31, respectively. The impact of different fire frequencies affected the chemical content of the soil. Land fires have positive and negative impacts. The positive impact increased pH of soil palm plantations, while the negative impact caused air pollution and damage to soil structures.
ANALISIS TINGKAT BAHAYA EROSI DI DAERAH ALIRAN SUNGAI KAMPAR BAGIAN HULU Mitri Irianti; Besri Nasrul; Idwar Idwar
EcoNews Vol 1 No 1 (2018): EcoNews
Publisher : Program Studi Ilmu Lingkungan, Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.661 KB) | DOI: 10.47826/econews.1.1.p.1-7

Abstract

The upstream of Kamparwatershed represent the part of Siak Watershed in the Province ofRiau which has been degradated.This research aims to determine the location, wide, anddegree of the land criticality according to the erosion hazard level in the upstream ofKampar watershed. So the research can determine the way, type, and priorities ofwatershed management. This research used survey method and laboratory analysis of soilsamples. The survey was done by observing the land use and conservation applied to theland unit. The data collected were rainfall, soil characteristics, slopes, crop management,and land conservation techniques. The obtained data were analyzed using the USLEformulation to define the erosion hazard level of the upstream Kampar watershed. Theresults found that the erosion of the upstream Kampar watershedis in the high category.The best practices to reduce the level of erosion hazard in the upstream Kampar watershedare improving the crop management and land conservation techniques in an integratedmanner on each land unit.
PENGARUH KAPUR PADA MEDIA TANAM TERHADAP PERTANAMAN CABAI MERAH Eni Miftahul Janah; Idwar; Armaini
DINAMIKA PERTANIAN Vol. 36 No. 1 (2020): Jurnal Dinamika Pertanian Edisi April 2020
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2020.vol36(1).5367

Abstract

ABSTRACT Red chili has a potential to be developed in sub-optimal land (Inceptisol, Ultisol, and peatland) by adding lime as amelioration. Besides that good characteristics of peat soils can also improve Ultisol and Inceptisol soils when is mixed. With the application of these technologies can increase the productivity of red chili. This study aimed to examine the effect of agricultural lime on several growing media and to determine the best treatment on the growth and yield of red chili. The study was conducted at the experimental farm of the Faculty of Agriculture, University of Riau from April to September 2018. The research was carried out in factorial with 2 factors and designed by completey randomized design and then tested with Duncan's new multiple range test. The first factor was media Ultisol, Inceptisol, peat, peat+Ultisol, and peat+Inceptisol. The second factor consisted of lime 0,0 x Al-dd, 1,0 x Al-dd and 2,0 x Al-dd. The observed parameters were stem diameter, flowerage, number, length, diameter, and weight. The results showed that lime application 1,0 x Al-dd for Inceptisol provided a good effect on stem diameter, flowerage, number, length, diameter, and fruit weight. The best treatment was found in 1,0 x Al-dd on peat+Inceptisol with a productivity of 135,10 per plant. Keywords: Lime, Planting media, Chili, Ultisol, Inceptisol, Peat,
PEMANFAATAN KOMPOS AMPAS SAGU DAN PUPUK FOSFOR UNTUK PERTUMBUHAN DAN PRODUKSI TANAMAN OKRA (Abelmoschus esculentus (L.) Moench) Desi Ratna Sari; Nurbaiti; Idwar
DINAMIKA PERTANIAN Vol. 37 No. 2 (2021): Jurnal Dinamika Pertanian Edisi Agustus 2021
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2021.vol37(2).11853

Abstract

The purpose of this study is to determine the effect of the interaction of sago pulp compost and phosphorus fertilizer, the single factor of sago pulp compost and phosphorus fertilizer, and to obtain the optimal dosage of sago pulp compost and phosphorus fertilizer for growth and production of okra plants. The study was conducted at the Experimental farm of the Faculty of Agriculture, University of Riau. The study used a factorial randomized block design (RCBD). The first factor is the dosage of sago pulp compost (K) K0 : 0 kg per plot (0 tons.ha-1), K1 : 1,75 kg per plot (8,75 tons.ha-1), K2 : 3,50 kg per plot (17,50 tons.ha-1) and K3 : 5,25 kg per plot (26,25 tons.ha-1). The second factor is the dosage of SP-36 phosphorus fertilizer (P) P0 : 0 g SP-36 per plot (0 kg.ha-1), P1 : 10 g SP-36 per plot (50 kg.ha-1) and P2 : 20 g SP-36 per plot (100 kg.ha-1). The parameters observed were plant height, number of fruits per plant, fruit length, fruit diameter, fruit weight per plant, number of fruits per plot, and fruit weight per plot. The data obtained were statistically analyzed using variance and continued with Duncan's New Multiple Range Test at the level 5%. The results showed that the interaction of sago pulp compost and phosphorus fertilizer could increase plant height, fruit length, fruit diameter, fruit weight per plant, number of fruits per plot, and fruit weight per plot. The best dosage of the growth and production of okra plants is 5,25 kg of sago pulp compost per plot and 20 g SP-36 of phosphorus fertilizer per plot, but the replicated 5,25 kg of sago pulp compost per plot and 10 g SP-36 of phosphorus fertilizer per plot was the optimal dosage that able to produce okra as much 7,01 tons.ha-1.
PENGARUH KEDALAMAN MUKA AIR TANAH TERHADAP PERTUMBUHAN DAN PRODUKSI SERTA MUTU FISIOLOGIS BENIH KEDELAI (Glycine max (L) Merril) YANG DIHASILKAN Randika Prasetya; Idwar; Armaini
DINAMIKA PERTANIAN Vol. 37 No. 2 (2021): Jurnal Dinamika Pertanian Edisi Agustus 2021
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/dp.2021.vol37(2).11869

Abstract

Soybean production in Indonesia has decreased year by year. This is caused by high rainfall potentially causing water-saturated land. This is due to heavy rain which can cause the water to become saturated. Implementation of drainage and groundwater depth control is expected to increase soybean productivity. The purpose of this study is to determine the best groundwater depth for growth, production and physiological quality of soybeans produced. The study was conducted at the Experimental farm of the Faculty of Agriculture, the University of Riau from February to May 2019. The depth of the groundwater used was 5 cm, 10 cm, 15 cm, 20 cm, and control treatment. The parameters observed were plant height and number of nodes, flowering age, age of harvest, number of seeds per plant, dry weight of seeds per plant, the weight of 100 seeds per plant, the suitable percentage for seed, standard germination test, and index value test. Data were analyzed by analysis of variance then continued with Duncan's New Multiple Range Test at the 5% level. The results showed that a depth of 5 cm, which produces poor aeration, leads to unoptimal absorption of nutrients, thus plant height and number of nodes, number of seeds per plant, dry seed weight per plant, 100 seed weight per and the suitable percentage for seed decreased. In the treatment, a water level of 20 cm from the soil gave the best results in terms of seed growth, production and physiological quality due to good ventilation, sufficient water availability and optimal absorption of nutrients.
The Growth and Yield of Upland Rice (Oryza sativa L.) Applied by Rice Husk Zeolite and Potassium Fertilizer Nelvia Nelvia; Idwar Idwar; Zulfatri Zulfatri; Desra Winri
JOURNAL OF TROPICAL SOILS Vol 29, No 2: May 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i2.93-100

Abstract

The productivity of upland rice on sub-optimal land such as Ultisol is low. Increasing rice productivity can be attempted, for example, by applying rice husk zeolite and K fertilizer. This research aims to study the interaction of rice husk zeolite with K fertilizer on the growth and yield of upland rice on Ultisol. The research was conducted at the Soil and Greenhouse Laboratory, Faculty of Agriculture, University of Riau, from June to October 2022. The research was conducted experimentally in a factorial with a completely randomized design (CRD). The first factor was rice husk zeolite consisting of 3 levels (0, 200, and 400 kg ha-1), and the second factor was K fertilizer consisting of 3 levels (0, 50, and 100 kg K2O ha-1), each interaction repeated three times. The results showed that the combination value of rice husk zeolite at a dose of 200 kg ha-1 with K fertilizer at a dose of 50 kg K2O ha-1 increased the number of healthy grains per panicle by 21%, the proportion of healthy grain by 14% and the weight of dry milled grain by 32.25% compared to without rice husk zeolite and K fertilizer.
Co-Authors Amir Franky Simamora Anita, Sofia Anthony Hamzah Armaini Besri Nasrul desi ratna sari Desra Winri Eni Miftahul Janah Isna Rahma Dini Mitri Irianti Nelvia Nelvia Nurbaiti Randika Prasetya T. Abu Hanifah Zulfatri Zulfatri