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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Agrohorti Bulletin (e-Journal) Jurnal Hortikultura Indonesia Jurnal Manajemen dan Agribisnis Pastura; Journal Of Tropical Forage Science Jurnal Pendidikan dan Pembelajaran Jurnal Dinamis Jurnal Keteknikan Pertanian Jurnal Hortikultura Jurnal AgroBiogen Jurnal Penelitian Tanaman Industri Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Dimensi Pratama Teknik Sipil Jurnal Ilmu Ternak dan Veteriner Jurnal Agro Jurnal Manajemen Sumber Daya Perairan Animal Production : Indonesian Journal of Animal Production The Jurnal Arsip Rekayasa Sipil dan Perencanaan (Journal of Archive in Civil Engineering and Planning) Jurnal Kimia Terapan Indonesia Mesin Jurnal Teknologi & Industri Hasil Pertanian Journal of Tropical Crop Science Embrio : Jurnal Kebidanan EQIEN - JURNAL EKONOMI DAN BISNIS Jurnal Teknologi Hasil Pertanian JURNAL ANSIRU PAI : Jurnal Pengembangan Profesi Guru Pendidikan Agama Islam Jurnal Agrium Jurnal Manajemen Bisnis dan Kewirausahaan Jurnal Penelitian Tanaman Industri (Littri) Jurnal Ilmu Manajemen Profitability INVOICE : JURNAL ILMU AKUNTANSI Proceeding International Seminar of Islamic Studies

M A Chozin

Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor

Author-ID : 247339

Religion Agriculture, Biological Sciences & Forestry Arts Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Veterinary Other

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Senyawa Fenol dari Tajuk dan Umbi Teki (Cyperus rotundus L.) pada Berbagai Umur Pertumbuhan serta Pengaruhnya terhadap Perkecambahan Gulma Berdaun Lebar Ayu Vandira Candra Kusuma; Muhammad Ahmad Chozin; dan Dwi Guntoro
Indonesian Journal of Agronomy Vol. 45 No. 1 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Purple nutsedge (Cyperus rotundus L.) is noxious weed that contains allelochemicals which inhibit other plants germination, thereby it can be potentially used as bioherbicide. Laboratorium experiments were conducted to identify phenol compound in purple nutsedge’s shoot and tuber from three plant ages, and to study its effect on germination of Asystasia gangetica and Borreria alata. First experiment was single factor using descriptive method and the second experiment was arranged in completely randomized design with single factor. The first experiment treatments were shoot and tuber extracts of purple nutsedge from 1, 2, and 3 months after planting. The second experiment treatments were control, shoot, tuber, and all parts extracts of purple nutsedge from 1, 2, and 3 months after planting, with 3 replications. Data from the second experiment was analyzed using F test and followed by Tukey test 5%. Result showed that shoot extracts from 2 months after planting had the highest type of phenol compound namely 2-methoxy-4-vinylphenol; phenol,2,6-dimethoxy; 2-furanmethanol; and α-tocopherol. Tuber extract from 3 months after planting suppressed germination rate of A. gangetica about 54.72%. All parts extracts from 2 months after planting suppressed germination rate of B. alata about 60.98%. Purple nutsedge’s extracts inhibited growth of plumule and radicle of B. alata at 2 days after sowing. This showed that purple nutsedge’s extract gave different effects on different weed species.Keywords: allelochemicals, Asystasia gangetica, bioherbicide, Borreria alata, suppression

Evaluasi Pertumbuhan dan Perkembangan Arachis pintoi sebagai Biomulsa pada Budidaya Tanaman di Lahan Kering Tropis Ade Sumiahadi; M. Achmad Chozin; dan Dwi Guntoro
Indonesian Journal of Agronomy Vol. 44 No. 1 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTCover crops is widely used as biomulch because of its advantages for land conservation, weed control and increasing soil nutrients, especially in upland agriculture. The objective of the research was to study the growth and development of Arachis pintoi as biomulch in upland agriculture. The experiment was carried out at IPB Experimental Field from February until May 2014. Observation was done everyweek up to 12 weeks with 10 plants were used for each observation. One stolon of A. pintoi with 4 internodes was planted in each 0.25 m2 plot. The results showed that root initiation of A. pintoi was occured at 3 weeks after planting (wap) and produced 42.4 roots with average root length of 17.10 cm on 12 wap.A. pintoi had nett assimilation rate of 0.0023 g cm-2 per day and relative growth rate of 0.052 g per day. With this growth rate, A. pintoi covered 58% of 0.25 m2 plot and produced biomass 10.08 g per plant within 12 wap. A. pintoi produced flowers on 4 wap and pods on 7 wap. A. pintoi produced root nodules through mutualism symbiosis with local Rhizobium. The equation for rate of coverage is Coverage (%) = 5.273 Time (wap)-16.512; 100% land coverage can be reached on 22 wap. Based on the results of this study, A. pintoi is potential to be used as biomulch; however, a denser spacing must be applied for faster land coverage.Keywords: land coverage, mulch, Rhizobium, stolon

Identifikasi Senyawa Fenol Beberapa Aksesi Teki (Cyperus rotundus L.) serta Pengaruhnya terhadap Perkecambahan Biji Borreria alata (Aubl.) DC. Sangrani Annisa Dewi; Muhammad Ahmad Chozin; dan Dwi Guntoro
Indonesian Journal of Agronomy Vol. 45 No. 1 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Purple nutsedge (Cyperus rotundus L.) is one of the important weeds in the world because of its ability to suppress the production of crops and difficult to control. C. rotundus residues can suppress the growth of others weeds. The experiments were conducted to identify the phenolic compound of C. rotundus from six different accessions and to determine the allelopathic effects of C. rotundus extracts on germination of Borreria alata (Aubl.) DC. The identification of phenolic compound was done using extract from all part of mature C. rotundus taken from different accessions and was analyzed using GC-MS. Analysis of C. rotundus extracts on germination of B. alata was designed using completely randomized design with three replications. The treatments were extract of C. rotundus from different accessions (from Cikarawang-Darmaga, Babakan-Darmaga, Ciawi, Megamendung, Cisarua, and Cianjur) with different concentration, 0.75 kg L-1 and 1.5 kg L-1. The result showed that C. rotundus from six accession had phenolic compond with different amounts. Cianjur accesion contained the most phenol content such as 2-furanmethanol; 1,4-benzenediol; 2-methoxy-4-vinylphenol; phenol, 2,6-dimethoxy; syringic acid; and 3-hydroxybenzoic acid. Germination test showed that C. rotundus extracts from different accessions and concentration had the same inhibitory effect on germination of B. alata.Keywords: Allelopathy, bioherbicide, purple nutsedge, weed management

Potensi Gangguan Gulma pada Tiga Sistem Budidaya Padi Sawah Lalu Muhamad Zarwazi; Muhammad Achmad Chozin; dan Dwi Guntoro
Indonesian Journal of Agronomy Vol. 44 No. 2 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTWeeds has become a big problem in system of rice intensification (SRI), integrated crop management (ICM) and conventional cultivation systems. The objective of the research was to study the dominancy and potential of harmful effect of weed in these three cultivation systems. The research was conducted at Sukamandi research station of Indonesian Center for Rice Research, Subang, from November 2013 to April 2014 during rainy season. The experiment was arranged in a split plot design with four replications. The cultivation systems was main plot consisted of system of rice intensification (SRI), integrated crop management (ICM) and conventional system. The weeding techniques as subplot consisted of no weeding, manual weeding, mechanical weeding and chemical weeding. The result showed that based on dry mass of weeds the highest risk of weed was exhibited at SRI with total dry mass of weed 51.53 g m-2 (0.5 ton ha-1) and the lowest was at conventional system with 32.45 g m-2 (0.3 ton ha-1). Proper weed control increased rice production by 28.9% for SRI, by 29.4% for ICM and by 14.6% for conventional cultivation systems. Keywords: dominant, weeding technique, SRI, ICM, conventional system

The Effects of Cutting Heights and Intervals of Defoliation on Productivity and Nutrient Content of Brachiaria humidicola(Rendle) Schweick Selvie Diana Anis; Muhamad Ahmad Chozin; Soedarmadi Hardjosoewignyo; Munif Ghulamahdi; , Sudradjat
Indonesian Journal of Agronomy Vol. 39 No. 3 (2011): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The productivity of forage is strongly influenced by cutting height and interval of defoliation. Experiment was conducted at the Research Institute for Industrial Plants and Other Palm (BALITKA) Manado since June 2008 until April 2009. The objective of the experiment was to find out the effects of intensity and intervals of defoliation on dry weight production and the quality of nutrients. The experiment was arranged in factorial RCBD. The intensity of defoliation was based on cutting height, i.e. 5, 10, 15 cm, whereas the intervals of defoliation were 30, 45, 60 day and 456.54 Degree Days (DD). The data of dry weight production, leaf stem ratio, nutrient quality were collected. The results showed that there were significant effects of treatments on all parameters. Productivity of B. humidicolai terms of high dry weight yield, high leaf stem ratio and crude protein, low crude fiber and acid detergent fiber (ADF) content were found in the interaction of intensity 10 cm with the interval of defoliation among the vegetative development stage of 30 and 45 days, as well as the interval of defoliation based on heat unit accumulation of 456.54 DD. The research implies that a cutting height at 10 cm and interval of defoliation as mentioned above is ideal for B. humidicola. Utilization of growing degree days (GDD) to determine the appropriate time for defoliation is considerable under this experiment.Keywords: B. humidicola, defoliation, forage, nutrient, productivity

Pengaruh Konsentrasi Besi dalam Larutan Hara terhadap Gejala Keracunan Besi dan Pertumbuhan Tanaman Padi Aidi Noor; Iskandar Lubis; Munif Ghulamahdi; Muhammad Achmad Chozin; Khairil Anwar; Desta Wirnas
Indonesian Journal of Agronomy Vol. 40 No. 2 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Iron (Fe) toxicity is a major constraint in rice production that decreases yield due to high level of soluble Fe. The aims of this experiement were to study the effect of particular Fe concentrations in nutrient solution on rice growth, and to determine Fe concentration in nutrient solution that caused light, moderate, and severe Fe toxiciy symptom. The experiment was conducted in a greenhouse, Bogor Agricultural University from May to July 2010. A randomized block design with two factors and three replications were used in this study. The first factor was Fe concentration in the medium solution (2, 50, 100, 200, 400, 600 ppm Fe), and second factor was rice genotypes (IR64, Margasari). The results showed the higher Fe concentration in the solution resulted in higher scores of iron toxicity symptoms, higher Fe levels in the plant, and caused stunted growth of rice plants. Levels of Fe in a solution of ≥ 200 ppm Fe inhibited plant growth. Iron toxicity symptom in Margasari was lower than the IR64 varieties, especially at concentrations of 200 and 400 ppm. According to the regression equation Y = 0.022X+ 1849, Fe concentration in the solution which caused light Fe toxicity symptom (score ≤ 3) was ≤ 52 ppm Fe, moderate (score = 5) was 143 ppm Fe, heavy (score = 7) was 234 ppm Fe, and severe (score ≥ 9) was ≥ 325 ppm Fe. Keywords: iron toxicity symptoms, iron concentration, rice

Perbandingan Arachis pintoi dengan Jenis Tanaman Penutup Tanah Lain sebagai Biomulsa di Pertanaman Kelapa Sawit Belum Menghasilkan Yuniarti ,; M. Achmad Chozin; Dwi Guntoro; dan Kukuh Murtilaksono
Indonesian Journal of Agronomy Vol. 46 No. 2 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Cover crops have the same role as biomulches to maintain soil moisture and reduce the evaporation of soil water. The objective of research was to compare Arachis pintoi versus other cover crops as biomulch in immature oil palm plantations. The study was conducted in the Field of Education and Research Palm IPB-Cargill, Jonggol, Bogor starting in December 2014 until May 2015. The experiment was designed according to a randomized block design with four replications. The treatments were cover crop species (biomulch) i.e. no biomulch/natural vegetation, Arachis pintoi Karp. & Greg., Centrosema pubescens Benth., Calopogonium mucunoides L. and Pueraria javanica Benth. Planting materials used were cutings of A. pintoi and seed of C. pubescens, C. mucunoides and P. javanica. The planting material were planted in plots 9 m x 3 m and plot for biomass 1 m x 1 m. The results showed that the A. pintoi was not significantly different from other biomulches for ground covering and capability to hold water. Soil water content in the treatment of A. pintoi biomulch was not different from other biomulch treatments.

Identifikasi Spesies Tanaman Penutup Tanah pada Perkebunan Kelapa Sawit Menghasilkan Suryana; Muhamad Achmad Chozin; Dwi Guntoro
Indonesian Journal of Agronomy Vol. 47 No. 3 (2019): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The study aimed to identify the types of plants suitable for cover crops on mature oil palm. The study was started by conducting microclimate measurements and vegetation analysis in a mature oil palm ecosystem with plant subjects consisting of 5 years and 10 years old plants. The measurements and analysis were carried out in August 2018 to select suitable plant samples. The research was continued by planting 6 selected plants under the shade of 0, 25, 50, and 75% using nested design to determine the responses of plant samples to various levels of shading from September 2018 to April 2019 at the Cikaawang IPB Experimental Field. The results of microclimate analysis in 5-year-old mature oil palm in Jonggol shows the light intensity of 1094.7 lux with a temperature of 28.5 oC and humidity of 68.76%, while a 10-year-old mature oil palm in Cikabayan had a light intensity of 997.8 lux with a temperature of 32.5 oC and humidity of 87.25%. The species of Asystasia gangentica, Axonopus compressus, Borreria alata, and Ottochloa nodosa were the dominant plant vegetation in two ecosystems. Asystasia gangentica was able to grow and optimally cover the area at all shading levels, while Axonopus compressus, Borreria alata, and Ottochloa nodosa can only grow and cover the area optimally at 0% and 25% and 50% shade, respectively. Keywords: micro climate, response of plant species, vegetation analysis

Perbedaan Respon Pertumbuhan, Fisiologi dan Produksi 20 Genotipe Cabai Rawit terhadap Berbagai Tingkat Naungan Gretty Febriola Siahaan; Muhamad Achmad Chozin; Muhamad Syukur; Arya Widura Ritonga
Indonesian Journal of Agronomy Vol. 50 No. 1 (2022): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The main limiting factor affecting chili production is low light stress. Until recently, there have not been many reports of superior varieties of chili tolerant to low light. The aim of this study was to understand the difference of growth, physiology, and production responses of 20 chili genotypes under shading conditions. This study was conducted at Cikabayan Experimental Station of IPB University from October 2020 to April 2021. The experiment was arranged in a randomized complete block design. The shade factor consisted of four levels, namely 0, 25, 50, and 75%. The chili genotype response to 50% shade showed greater diversity compared to other shade levels. Based on genotype grouping, C. frutescens species had more shade-loving genotypes than C. annuum species. Fifty-percent shade increased plant height, number of leaves, and leaf area in all genotype groups. The shade-loving genotype group had the highest increase in morphological characters. The number of fruits per plant, weight per fruit, and total fruit weight per plant significantly decreased in the shade sensitive and moderate genotype groups. These three variables were significantly higher in shaded conditions than without shade in shade-loving genotype group. Keywords: agroforestry, light, photosynthesis, pigment

Pergeseran Dominasi Gulma Kebun Kelapa Sawit IPB Jonggol, dan Kemungkinan Resistensi terhadap Herbisida Glifosat Faras Gaitsa Bilkis; Muhamad Achmad Chozin; Dwi Guntoro
Indonesian Journal of Agronomy Vol. 50 No. 1 (2022): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Vegetation analysis has been done periodically at IPB oil palm plantations in Jonggol to identify the dominant weeds on the 1-year-old-mature plant (2016), 3-year-old-mature plant (2018), and 5-year-old-mature plant (2020). The study consisted of two experiments. The first experiment was to determine the dominant weed shift, while the second was to assess the possibility of weed resistance to glyphosate herbicide. Experiment I conducted vegetation analysis with the quadrant method 1 m x 1 m on 5 blocks; 20 samples were taken randomly from each block so that there were 100 observation samples. Experiment II planted seeds of weeds selected from experiment I, and as control, seeds of weeds from locations that never received herbicide. The amino acids observed are associated with glyphosate’s modes of action, namely phenylalanine, tyrosine, and L-tryptophan. Vegetation analysis showed there had been a shift in dominant weeds. In 2016, the dominant weed was Rolandra fruticosa and Melastoma malabathricum, in 2018 the Ottochloa nodosa, and in 2020 O. nodosa and Cyrtococcum patens. Asystasioa gangetica continues to increase in population. Resistance ratios, test weeds O. nodosa and C. patens are categorized as low resistance. The content of phenylalanine, tyrosine, and L-tryptophan test weed O. nodosa is higher than that of susceptible weed O. nodosa. Keywords: amino acids, dominant weeds, resistance ratio, vegetation analysis

Co-Authors , Handoko . Sugiyanta, . A Ali A. S. Suharyono Abdul Harris Burhan Abdullah Abdullah Ade Sumiahadi AHMAD JUNAEDI Ahmad Junaidi Aidi Noor Aji Hermawan Aldi M Alfima Rahasti Anas M. Fauzi Andhini, Martika Ani Kurniawati Anita Ristianingrum Ansyarif Khalid Artha Regina Tambunan Asdi Asdi Asep Nursangaji Asih Sukowati Astuti DA Astuti DA Awang Maharijaya Axel Anderson Ayu Vandira Candra Kusuma Bambang Pramudya Bambang S. Purwoko Bustami Syam Chairannisa, Dyana D.A. Astuti dan Kukuh Murtilaksono DARUSMAN, L.K. Darwis AN Darwis AN Desta Wirnas dewi novita Diah karyawati Dina Harsono Dwi Guntoro Dwiwanti Sulistyowati E. Namaken Sembiring Edi Santosa Edy Yusmin Eka Intan Kumala Putri Eka Wardiana EVA OKTAVIDIATI, EVA Faradesi Ardialisa Faras Gaitsa Bilkis Fibra Nurainy Gerson Hans Maure GHULAMAHDI, M. Gretty Febriola Siahaan h sanusi H. Soedarmadi HAJRIAL ASWIDINNOOR Hartami Dewi Hemawati Hemawati Hendrik Hendrik Herman Wafom Tubur Hesty Juniar Rukmin Hiroshi Ehara Hongarta, Reynaldo Ida H. Somantri Indriani Santoso Iqbal . Irwan Abdullah Iskandar Lubis ISMAIL SALEH Iswari S. Dewi Jalali Iqram Kanny, Putri Irene Karti PDMH Karti PDMH Khairil Anwar Krishna Surya Buana KWANG HO KIM Laila Nur Atika Lalu Muhamad Zarwazi Luki Abdullah M Zardan Araby M. Ghulamahdi Machfud Machfud Maisura Maisura Maria Erna Marmawi R . Maya Melati Mochammad Afifuddin Moeljarno Djojomartono Muftil Badri Muhamad Kurniadi Muhamad Syukur Muhammad Syaifuk Ar Rosyid Munawir, Fathurrahman Aziz MUNIF GHULAMAHDI P.M.D.H Karti, P.M.D.H Pangerang, Utama K. Perwita, Atikah Dyah Purwono Purwono Putri Sakura Raisa Baharuddin RANI FARIDA Ratih Marina Kurniaty Rinaldo, Ruswandi Ritonga, Arya Widura Sahrullah Sahrullah Sangrani Annisa Dewi Selvie D. Anis Selvie Diana Anis Sigit Prabawa Sobir Sobir Soedarmadi Hardjosoewignyo Soekisman Tjitrosemito Sofyan Zaman Sri Mulatsih Sudirman Yahya Sudradjat Sudradjat Sugiyanta Suryana Sutikno Sutikno Suwarto Tanto Pratondo Utomo Tineke Mandang Ulinnuha, Zulfa urai salam Vivid Violin Wenny Rahmawati WIJAYANTO, N. Yasidi, Farid Yudi Febrianto Yudi Febrianto Yuline . Yundari, Yundari Yuniarti , Zulfa Ulinnuha

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