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A. Sarjito
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Agriculture, Biological Sciences & Forestry

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RESPON TANAMAN JAGUNG TERHADAP APLIKASI PUPUK NITROGEN DAN PENYISIPAN TANAMAN KEDELAI A. Sarjito; B. Hartanto
Agrin Vol 11, No 2 (2007): Agrin
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.agrin.2007.11.2.72

Abstract

Penelitian ini dilakukan dengan tujuan untuk mengkaji respon tanaman jagung terhadap penerapansystem tumpangsari jagung-kedelai dan pemupukkan nitrogen. Penelitian dilakukan selama lima bulan, mulaiJuli – Nopember 2003. Penelitian merupakan percobaan lapang berpola faktorial 4 X 3. Percobaan diulangtiga kali. Jagung ditanam secara monokultur (P0) maupun tumpangsari dengan kedelai varietas Lokal (P1),Burangrang (P2), dan Lokon (P3). Pemupukkan nitrogen terdiri atas tiga dosis, yaitu: N0: kontrol, N1:pemupukkan urea 75 kg per hektar, dan N2: pemupukkan 150 kg urea per hektar. Pengaruh tumpangsariterhadap pertumbuhan dan hasil jagung bergantung pada tingkat pemupukkan nitrogen. Walaupuntumpangsari menurunkan pertumbuhan dan hasil tanaman, tumpangsari jagung-burangrang memberikan nilaiIndeks Panen tertinggi dibandingkan dengan pola tanam monokultur ataupun yang lain. Kecuali itutumpangsari juga meningkatkan serapan N pada tanaman jagung. Pemupukkan nitrogen mengakibatkanpeningkatan pertumbuhan dan hasil jagung. Hasil tertinggi diperoleh pada dosis 150 kg urea per hektar.Kata kunci: pertumbuhan dan hasil jagung, nitrogen, dan penyisipan kedelai.ABSTRACTThis research project aimed at evaluating the respond of maize toward intercropping and nitrogenapplication in the maize-soybean intercropping. The research was carried out for five months, from July toNovember 2003. A 4 x 3 factorial experiment was laid out in a Randomized Completely Block Design withthree replications. Maize was planted in monoculture (P0) and in intercropping system with three differentvarieties of soy been, i.e. Local (P1), Burangrang (P2), and Lokon (P3). Application of nitrogen fertilizerconsisted of N0: control, N1: 75 kg urea per hectare, and N2: 150 kg urea per hectare. Intercropping effectson maize growth and yield depend on nitrogen fertilized. Although intercropping reduced crop production,maize-Burangrang intercropping resulted in the highest value of harvest index. In addition, intercroppingincreased maize’s N uptake. Nitrogen application caused the improvement of maize growth and yield.Key words: maize growth and yield, nitrogen, and intercropped soybean. 
PERTUMBUHAN DAN HASIL BABY CORN PADA BERBAGAI DOSIS N DAN PERIODE BEBAS GULMA T. Agustono; A. Sarjito
Agrin Vol 11, No 1 (2007): Agrin
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.agrin.2007.11.1.61

Abstract

Penelitian ini bertujuan untuk mengkaji pengaruh pupuk N dan periode bebas gulma terhadappertumbuhan dan hasil baby corn, dengan sasaran untuk mendapatkan dosis N yang tepat dan waktu periodebebas gulma yang paling efektif. Penelitian ini dilaksanakan selama empat bulan, mulai bulan Mei 2006 danselesai bulan Agustus 2006. Kombinasi empat taraf pemupukkan N dan lima macam periode bebas gulmadiletakkan pada areal percobaan berdasarkan Rancangan Acak Kelompok Lengkap dan diulang tiga kali.Data yang diperoleh dianalisis dengan uji F, dan dilanjutkan dengan Duncan Multiple Range Test (DMRT)dan uji regresi untuk mengetahui pola pengaruh perlakuannya. Hasil penelitian menunjukkan bahwa pupuk Nmeningkatkan tinggi tanaman, bobot segar tanaman, serapan N dan komponen hasil serta hasil baby corn.Hasil baby corn tertinggi (2011.86 kg/ha) dicapai pada pemupukkan N sebesar 123.435 kg N/ha. Periodebebas gulma 0 sampai 2 mst sudah mampu mengurangi persaingan tanaman dengan gulma. Besarnya serapanN dan bobot kering tanaman jagung akibat pemberian pupuk N tergantung pada periode bebas gulma.Serapan N tertinggi (3,50 g per tanaman) diperoleh pada kombinasi dosis pupuk 138 kg N/ha dengan periodebebas gulma selama 6 mst.Kata kunci: pupuk N, periode bebas gulma, hasil baby corn ABSTRACTAn experiment evaluating the effects of N fertilization and weeds free period on the growth and yieldof baby corn was carried out for four months, from May until August 2006. This experiment aimed at findingout the appropriate dose of N fertilizer; determining the most effective time of weeding period; andevaluating the interaction effects between the two treatments as well as finding the best combination. Fourlevels of N application and five magnitudes of weed free periods were laid out in a Randomized CompleteBlock Design with three replications. Data obtained was analyzed by F test, and continued by DuncanMultiple Range Test (DMRT) and Regression test. N fertilization increased crop height, crop fresh weight,and yield component of baby corn. N application of 46 kg N/ha resulted the highest weight of cob withouthusk (1738.74 kg/ha) and there was no significant effect among the level of N fertilization. Weeds freeperiod significantly decreased the competition rate of crop and weeds. There was no significant effect amongthe level of weed free period. Weed free period up to 2 week after planting decreased crop-weed interaction.The effects of N fertilization on the rate of N uptake and dry weight of plant depended on the degree of weedfree period. The combination of 138 kg N/ha and weed free period during 6 weeks after planting resulted inthe highest N absorption (3.50 g per crop).Key words: N fertilizer, weed free period, baby corn yield 
Co-Authors B. Hartanto T. Agustono