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INDONESIA
EUGENIA
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The aims of this journal is to provide a venue for academicians, researchers and practitioners for publishing the original research articles or review articles. The scope of the articles published in this journal deal with a broad range of topics, including: Agronomi, Protection, Soil, Forestry, Agroecotecnology.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 17, No 1 (2011)" : 12 Documents clear
PERTUMBUHAN LIRIOMYZA SATIVAE BLANCARD DAN NESIDIOCORIS TENUIS REUTER PADA BEBERAPA GALUR SERTA VARIETAS TOMAT Sembel, D.T.; Manoi, T.; Tulung, M.; Pongoh, J.; Meray, M.; Ratulangi, M.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.93

Abstract

The objectives of thiswork was to study the difference on the population growths of these two pests of tomatoon plots with and without pesticide sprayings for 5 strains of tomatoes obtained from AVRDC (G1-G6) and 4 varieties (G7-G10) available in the local market. The population of leafminer started growing a week after replanting and reached the peak 7-8 weeks then it started declining until 12 weeks after replanting.Statistical analysis showed that there was no significant difference on the population growth of L. sativae on sprayed plots for all strains from AVRDCand varieties G7-G9 but it was significant different from G10. There was also no significant difference on population growths of L. sativae for strains G1,G2 and G4 to G7 and G8 but it was significant different with strains G5,G9 and G10 on sprayed plots and plots without spraying.The population of N. tenuis grew quicker and reached the peak on week 6 after replanting and starts declining until week 12th. Statistical analysis showed that there was no significant difference on the population of N. tenuis on all strains and varieties G7 and G8 on plots without spraying but there was significant difference for all strains and varieties G7-G9 with variety G10. ABSTRAKTujuan penelitian ini untuk mengetahui perbedaan pertumbuhan populasihama penggorok daun, Liriomyza sativae dan kepik tomat mirid, Nesidiocoris tenuis pada petak tanpa penyemprotan pestisida dan dengan penyemprotan pestisida pada 5 galur tomat yang berasal dari AVRDC dan 4 varietas tomat yang tersedia di pasaran.Populasi penggorok daun, L. sativae mulai terlihat sejak seminggu sesudah dipindahkan dan mencapai puncak 7-8 minggu kemudian populasihama mulai menurun sampai 12 minggu sesudah tanaman dipindahkan. Hasil analisis statistika tidak terdapat perbedaan nyata terhadap populasi L. sativae pada petak yang disemprot pestisida untuk semua galur dari AVRDC serta varietas G7- G9 tapi berbeda nyata dengan varietas G10. Juga, tidak terdapat perbedaan yang nyata antara populasi L. sativae untuk galur G1,G2, G4,G7dan G8 tetapi berbeda nyata dengan galur G5, G9 dan G10 pada petak yang tidak disemprot pestisida. Populasi L. sativae terendah pada varietas G10 baik pada petak penyemprotan maupunpetak tanpa penyemprotan pestisida.Populasi N. tenuis berkembang lebih cepat dan mencapai puncak pada minggu ke enam dan ke tujuh serta menurun sampai minggu ke 12 sesudah tanaman tomat dipindahkan.Hasil analisis statistika menunjukkan tidak terdapat perbedaan yang nyata terhadap populasi N. tenuis untuk semua galur dari AVRDC serta varietas G7 dan G8 pada petak tanpa penyemprotan tetapi terdapat perbedaan yang nyata antara semua galur dan varietas G7-G9 dengan varietas G10.
SIMULASI BIOMASSA AKAR, BATANG, DAUN DAN BIJI JAGUNG HIBRIDA PADA BEBERAPA PERLAKUAN PEMBERIAN NITROGEN Paat, Frangky J.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.98

Abstract

This study was aiming to assess growth of roots, stems, leaves and seeds of hybrid corn atdifferent application of nitrogen using a simulation model approach. The research wasconducted at the experimental garden in the village of Kakas Tountimomor Minahasa Region.The result showed that after 49 days of planting, optimum root biomass was 1050 kg / ha.Application of fertilization 92 kg/ ha produced the highest production which was 43.8 kg / ha.Field measurement showed that application of fertilization 92 kg / ha resulted steem biomass170.6 kg / ha. Simulation model revealed that stem biomass at the age of 70 HST allocated thehighest photosyntate which was 1300 kg / ha. The highest leaves biomass production wasdetected at the level of nitrogen fertilization 92 kg / ha resulting total production of 53.2 kg / ha.Optimalitation of biomass allocated to leaves until the flowering phase was 49 days afterplanting producing 3000 kg / ha. Field measurements for the highest seed biomass productionwas 54.9 kg/ha accounted by 92 kg N / ha. Simulation model of seed biomass showed thatseed filling stage was in between anthesis stage (75 HST) and physiological ripening (105HST) accounted 4500 kg/ha. ABSTRAKPenelitian ini bertujuan untuk mengidentifikasi pertumbuhan organ akar, batang, daun dan bijijagung hibrida dalam tiap-tiap perlakuan pemberian nitrogen melalui pendekatan modelsimulasi. Penelitian dilaksanakan dikebun percobaan di desa Tountimomor Kecamatan KakasKabupaten Minahasa. Hasil penelitian menunjukan bahwa model dapat mensimulasi titikoptimum biomassa akar yaitu 1050 kg/ha pada umur tanam 49 hari setelah tanam.Pemupukan nitrogen dengan taraf 92 kg/ha menghasilkan produksi tertinggi 43.8 kg/ha. Hasilpengukuran lapang pada taraf pemupukan 92 kg N/ha menghasilkan biomassa batang 170.6kg/ha. Hasil simulasi model biomassa batang pada umur tanam 70 hst menghasilkan alokasiproporsi fotosintesis tertinggi 1300 kg/ha. Hasil produksi biomassa daun tertinggi dihasilkanpada taraf pemupukan nitrogen 92 kg/ha dengan total produksi 53.2 kg/ha. Optimalisasiproporsi biomassa yang dialokasikan ke daun sampai pada fase pembungaan yaitu 49 harisetelah tanam dengan bobot 3000 kg/ha. Hasil pengukuran lapang untuk produksi biomassabiji tertinggi 54.9 kg/ha pada taraf pemupukan 92 kg N/ha. Hasil simulasi model biomassa bijimenunjukkan bahwa setelah fase anthesis yaitu 73 hst, fase pengisian biji mulai berlangsunghingga matang fisiologis pada 105 hari setelah tanam dengan total biji 4500 kg/ha.

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