Ikhwani Ikhwani
Pusat Penelitian dan Pengembangan Tanaman Pangan Jl. Merdeka 147, Bogor 16111

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Pengaruh Perendamandan Pemupukan N Terhadap Pertumbuhan dan Produksi Padi Toleran Rendaman Ikhwani, Ikhwani
Jurnal Lahan Suboptimal Vol 1, No 1 (2012)
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Ikhwani, 2012. The Effect of Submergence and N fertilizer Application on Plant Growth and Production of  Submerged Tolerant Rice Variety. JLSO 1(1):12-21.This study aimed at analyzing the effect of submergence and N fertilizer application on the plant growth and production of submergence tolerant rice variety. Problems and constrains of  rice production on flood prone and flash flood lowlandbecoming more frequents and more intens, causing submergence of the whole parts of rice crops for certain periods. The experiment was conducted to determine the effect of submergence and N fertilizer application on the growth of two treatment factors using block randomized design  with submergence tolerant variety Inpara 4 and 5.   An experiment was conducted in the greenhouse at Muara Experimental Station, Bogor in 2009. The treatments  consistedof three replications. The first factor was submergence rice variety Inpara 4 and 5 and the second factor was N management application, whereas (1) 200 kg Urea/ha, (2) 300 kg Urea/ha;  (3) 300 kg Ponska/ha + 100 kg Urea/ha; (4) 400 kg Ponska/ha (2x); (5) Briquette Urea  (300 kg Urea/ha) dan (6) 300 kg Urea/ha  +  Silikat (400 kg SiPPadi HS/ha).  Result of the experiment showed that   submergence for 14 to 24 DAP (10 days) on submergence tolerant rice variety combined with Briquette Urea (300 kg urea/ha  wrapped in strawpaper)  has increased the percentage of tiller number up to 98,9 percent , increased the highest total grain weight  for submergence tolerant rice  up to 41,2 gr per pot and increased in the proportion of  wet leave weight growth rate for  submersion treatment up to 1,4g per pot than that  without submergence. 
Ketahanan Varietas Padi Toleran Rendaman dan Responnya Terhadap Pemupukan Ikhwani, Ikhwani
Jurnal Lahan Suboptimal Vol 2, No 1 (2013)
Publisher : Jurnal Lahan Suboptimal

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Ikhwani. 2012. Resistency of Submergence Tolerant Rice Variety and Its Response to Fertilizers. JLSO 2(1):1-13.Submergence Tolerant Rice Varieties (STRV) were needed to anticipate yield reduction due to flash flood.  Adoption of good agriculture practices such as nutrient managements for the varieties was expected to reduce yield declaining due to submergence.  The objectives of this study were to understand the effects of submergence, fertilizers application and their interaction to plant growth pattern. A pot experiment was conducted in glasshouse at Muara Experimental Farm, Bogor from July to October 2011. The experiment was arranged in a factorial randomized complete block design with three replications.   Factor 1 was Fertilizer of 112.5 kg N / ha, in the form of prill urea (P1), SCU / ha (P2), Carbon Coated Urea (CCU) (P3), 400 Ponska kg + 100 kg urea / ha (P4), and treatment1 + 400 kg Silicate fertilizer / ha (P5).  Factor 2 was Variety, namely Ciherang sub 1 (V1), Inpara 4 (Swarna sub-1) (V2), Inpara 5 (IR64 sub1) (V3). Total treatments were 15 plus one set of "without submergence" treatment and their replications as controls. The duration of submergence was 14 days, (14 DAT - 28 DAT).  The results showed that submergence reduced rice yield up to 17.5% compared to without submergence, or from 19,2 g/pot to 15,9 g/pot.  Submergence decreased plant growth rate, tiller number and delayed plant maturity.  Decreased of plant height and tiller number for Ciherang sub 1 variety was the lowest.  Threatment of fertilizer with urea prill at this experiment was still the best. In this experiment, urea fertilizer lost due to submergence and washing was neglected
Peningkatan Produktivitas Padi Melalui Penerapan Jarak Tanam Jajar Legowo Ikhwani, Ikhwani; Pratiwi, Gagad Restu; Paturrohman, Eman; Makarim, A. K.
Buletin Iptek Tanaman Pangan Vol 8, No 2 (2013): Desember 2013
Publisher : Puslitbang Tanaman Pangan

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Rice productivity in the irrigated wet land could be increased by applying the best cultivation practices. Pair rows vis a vis square plant spacing is capable of increasing rice productivity, due to higher plant population and better plant orientation to utilize the solar radiation. Rice yield could be further improved through the varietal selection among the Inpari series (Inpari-14, 15, 18 and 19) to identify which one is the most adaptable to higher plant density. The minimum grain yield per hill of the pair rows was determined in order to identify rice variety or fertilizer rate which could yield more compare to that of square plant spacing. Plant hill with smaller number of tillers is expected to be suitable for pair rows planting. When plant hill has many tillers due to the varietal type or fertile soil, wider spacing of double pair rows, such as 4:1 (25-50 cm) x 12.5 cm is suggested. The introduction of pair rows or double pair rows initially was not well accepted by farmers due to the higher seed requirement and higher labor cost when compared to that of the square plant spacing. However, the pair-rows spacing has been accepted now due to a better and easier in crop protection and fertilizer application. In a large farming scale, pair rows planting requires the support of machines as the a planting tool which is adjustable to desired plant spacing, durable and easy to operate. Rapid varietal identification to select suitable varieties for pair rows planting is needed in order to provide advice to farmers of the optimum plant spacing for each particular variety.
PENGEMBANGAN BUKU AJAR KIMIA KELAS XII SMA/MA SEMESTER II TERINTERNALISASI NILAI KARAKTER SESUAI DENGAN KURIKULUM 2013 ikhwani, ikhwani; Maulidi, Ikhsan
Lantanida Journal Vol 6, No 1 (2018)
Publisher : FTK UIN AR-RANIRY

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The aim of this research was: (1) to give the standardization of BSNP information from a chemistry text book of the 2nd semester in class XII that internalized by character value in accordance with the curriculum development of 2013, (2) to see the result of learning and to know the result of students' attitude observation in the learning process. The benefits of this research was the existence of textbooks that fit into BSNP standard has been already good and adding the scientific information. The method used in this research was: Research and Development method by using BSNP Standardization in the chemistry book that validated by chemistry teacher in Langsa city and the application test in book development and doing observation process toward student attitude to learning. Based on the research that has been done, it is found that: (1) the development of textbooks has fulfilled the standard of content feasibility assessment with a score about 4.18, score language about 4.64, presentation of score about 4.6 and graphic book or score about 4.5, so it was valid. (2) the students learning outcomes by using this book book indicate the increasing of students' knowledge from the average score of pretest score of 43.3 to postes of 91.66. (3) The result of the attitude assessment was shown from the observation value to the student discussion attitude with the cooperation was score about 2.4, the curiosity score about 2.8, attitude score about 2.6 and communication score about 3.1. The conclusions of this research, were: (1) the result of the book development has been very feasible to use, (2) the increasing of student learning outcomes equal to 84.78%. (3) There is a change in student character to be better.
TEKNOLOGI BUDIDAYA VARIETAS UNGUL BARU PADI SAWAH PADA DUA MUSIM TANAM Ikhwani, Ikhwani
Informatika Pertanian Vol 23, No 1 (2014): JULI, 2014
Publisher : Sekretariat Badan Penelitian dan Pengembangan Pertanian

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Dalam upaya peningkatan produksi padi Nasional secara berkesinambungan diperlukan adanya perbaikan inovasi teknologi budidaya padi yang lebih baik secara berkesinambungan pula, yang merupakan prinsip PTT. Percobaan bertujuan untuk mendapatkan teknologi yang lebih baik dari pada cara budidaya yang sekarang dilakukan petani setempat, seperti varietas yang lebih baik, pemupukan dan jarak tanam yang lebih sesuai agar terjadi peningkatan produktivitas padi. Percobaan dilaksanakan di lahan petani Desa Sukamandi Jaya, Kecamatan Ciasem, Kabupaten Subang Jawa Barat MK tahun 2012 dan MH 2012/2013. Rancangan percobaan yang digunakan adalah Petak-petak terpisah dengan tiga ulangan. Petak utama pemupukan, yaitu P1- terbaik setempat (urea -300 kg per ha, SP36-50 kg, KCl -50 kg). P2 – rekomendasi alternatif bedasarkan SIPAPUKDI (Urea =320 kg/ha, SP36= 70 kg/ha, KCl= 130 kg/ha). Urea dan KCl diberikan 3 kali yaitu pada umur 7 hst, 21-25 hst dan 42 hst (menjelang primordia), Anak petak: cara tanam yaitu T1 -Terbaik setempat (Tegel 25 cm x 25 cm) dan T2 – .Jarak tanam lebih rapat (25 cm x 20 cm); Anak-anak petak: varietas unggul baru yaitu V1- var terbaik setempat, (Ciherang), V2- Inpari 14, V3- Inpari 17dan V4- Inpari 6. Ukuran petak percobaan terkecil (anak-anak petak) 8 m x 5 m, dengan jumlah keseluruhan 48 petak. Umur bibit saat tanam 21 hss. Hasil pecobaan menunjukkan bahwa komponen teknologi PTT yang diterapkan pada MK tahun 2012 dapat diperbaiki dengan mengintroduksi cara pemupukan SIPADI dengan dosis K yang lebih tinggi dibandingkan dengan cara pemupukan setempat serta menggunakan varietas Inpari-14. Cara ini menaikkan hasil padi dari 5.5 t/ha (cara sekarang) menjadi 7.6 ton GKP/ha, pada MH tahun 2012/2013.