scholarly journals Pengaruh Kumulatif Cekaman Biotik dan Abiotik Terhadap Penurunan Pertumbuhan Tajuk Tanaman Kedelai [Glycine max (L.) Merr.] cv. Grobogan

2016 ◽  
Vol 1 (1) ◽  
pp. 48
Author(s):  
Sri Darmanti
Keyword(s):  
Glycine Max ◽  
Cyperus Rotundus ◽  
Glycine Max L

Pada kondisi alami, tumbuhan sering terpapar pada kondisi beberapa cekaman biotik dan abiotik secara bersamaan. Tumbuhan merespon cekaman ganda dengan cara yang berbeda dibanding responya terhadap cekaman tunggal.  Pengaruh cekaman ganda dapat ditunjukkan sebagai persen (%) pengaruh kumulatif, yaitu perbandingan antara persen pengaruh cekaman ganda dengan persen pengaruh cekaman tunggal yang menyebabkan perubahan paling besar terhadap parameter yang diukur. Penelitian bertujuan mengkaji pengaruh kumulatif cekaman ganda biotik berupa interferensi gulma teki (Cyperus rotundus L.) dan abiotik berupa kekeringan terhadap penurunan pertumbuhan tajuk kedelai [Glycine max (L.) Merr. ] cv. Grobogan. Penelitian menggunakan metode ekperimental rancangan acak lengkap dua faktor (3 x 3), yaitu tingkat interferensi teki (kontrol, tiga teki, enam teki) dan tingkat cekaman kekeringan (kontrol, ringan, berat). Hasil  penelitian menunjukkan pengaruh kumulatif cekaman ganda biotik dan abiotik dalam menurunkan pertumbuhan tajuk tanaman kedelai cv. Grobogan bersifat cross synergism yaitu salah satu dari kedua cekaman menyebabkan meningkatnya kepekaan tanaman kedelai cv. Grobogan terhadap cekaman yang lainnya.     Kata kunci : cross synergism, pengaruh, kumulatif, teki, kedelai

scholarly journals Allelopathic Effect of Cyperus rotundus L. on Seed Germination and Initial Growth of Glycine max L. cv. Grobogan

2015 ◽  
Vol 17 (2) ◽  
pp. 61 ◽  
Author(s):  
Sri Darmanti ◽  
Santosa Santosa ◽  
Kumala Dewi ◽  
L Hartanto Nugroho
Keyword(s):  
Glycine Max ◽  
Seed Germination ◽  
Petri Dish ◽  
Dry Weight ◽  
Cyperus Rotundus ◽  
Tolerance Index ◽  
Allelopathic Effect ◽  
Initial Growth ◽  
Purple Nutsedge ◽  
Glycine Max L

Allelopathy is a phenomenon of direct or indirect, beneficial or adverse effects of a plant on its own or another plant through the release of chemicals into the environment. This experiment was carried out to determine the allelopathic effect of Cyperus rotundus L. (purple nutsedge) tuber aqueous extract on seed germination and initial growth of Glycine max L. (soybean) seedlings. The experiment was performed in completely randomized (CRD) design with five replications, using a range of concentrations of aqueous tuber extracts of nutsedge, i.e.: 0%, 5%, 10%, 15%, 20% and 25%. The petri dish experiment showed that with increase of the tuber extract concentration, a significant increase was noted in mean germination time (MGT), significant decreases in germination index (GI), growth tolerance index (GTI), wet weight seedling, dry weight seedling and  length of soybean seedling.  

scholarly journals EFEKTIVITAS BERBAGAI FORMULASI RIZOBAKTERI SEBAGAI BIOHERBISIDA PADA PERTANAMAN KEDELAI (Glycine max (L.) Merril)

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Afiati Bahrawi ◽  
La Karimuna ◽  
Muhidin Muhidin
Keyword(s):  
Glycine Max ◽  
Block Design ◽  
Analysis Data ◽  
Cyperus Rotundus ◽  
Bacillus Sp ◽  
Laboratory Unit ◽  
Randomized Complete Block Design ◽  
Glycine Max L ◽  
Cleome Rutidosperma ◽  
Range Test

ABSTRACKThe purpose of this research was to study the effectiveness of various formulations rhizobacteria as bioherbicide in soybean. This research was conducted at the Agrotechnology Laboratory Unit Agronomy and Field Laboratory, Faculty of Agriculture Halu Oleo university, Kendari from March to June 2016.This research was arranged on randomized complete block design (CBD), which consisted of seven treatments that are P0 (Control), P1 (Bacillus sp. A05 + water), P2 (Bacillus sp. A05 + talc), P3 (Bacillus sp. A05 + husk charcoal powder), P4 (P. aeruginosa A08 + water), P5 (P. aeruginosa A08 + talc), P6 (P. aeruginosa A08 + husk charcoal powder). The treatments was repeated three times so that there were 21 experimental units. Weed vegetation were analyzed using quadratic metode, quadrant size used was 1x1 m2, observations were made one time when the soybean was 21 HST. The soybean data were analyzed using of analysis variance followed by Duncan's Multiple Range Test if the treatments was significant. The results showed that treatment of formulations rhizobacteria P6 namely P. aeruginosa A08 in the husk charcoal powder carrier formulation was the best among all 5 other formulations, that could be seen in the weeds vegetation analysis data results, showed that P. aeruginosa A08 in the husk charcoal powder carrier formulation could suppress the growth of Cleome rutidosperma D.C and Cyperus rotundus L. which was the dominant weeds in soybean. Husk charcoal powder was able to improve the suitability of rhizobacteria P. aeruginosa A08 as bioherbisida in the field so that they could worked more effectively as bioherbisida than other treatments. Keywords: Bioherbicides, formulation rhizobacteria, Glycine max (L.) Merrill

scholarly journals Estudo de competição inter e intraespecífica envolvendo Glycine max (L. ) Merril e Cyperus rotundus (L.), em condições de casa de vegetação

1983 ◽  
Vol 6 (2) ◽  
pp. 129-137 ◽  
Author(s):  
R.A. Pitelli ◽  
J.C. Durigan ◽  
N.J. Benedetti
Keyword(s):  
Glycine Max ◽  
Cyperus Rotundus ◽  
Glycine Max L

O presente experimento teve por objetivo estudar os efeitos da competição inter e intraespecífica envolvendo Glycine max (L.) Merril e Cyperus rotundus L. sobre as características das plantas e acúmulos de N, P, K, Ca e Mg pelas espécies envolvidas. Para tanto, estipulou-se um tratamento em que se desenvolveram três plantas de Glycine max e outro em que se desenvolveram 3 tubérculos de Cyperus rotundus por vaso. Para estudar os efeitos da competição intraespecífica, em dois outros tratamentos dobraram-se as populações por vaso. No estudo da competição interespecífica permitiu-se o desenvolvimento de três plantas de Glycine max e de três tubérculos de Cyperus rotundus num mesmo vaso. De uma maneira geral, pôde-se observar que principalmente devido às diferenças no hábito de crescimento das duas espécies, a expressão da competição inter e intraespecífica, em cada uma delas, assume aspectos distintos. No caso de Cyperus rotundus, o efeito do dobro da densidade pôde ser compensado, em parte, pela maior produção de manifestações epígeas e de tubérculos, aliados ao maior desenvolvimento dos tubérculos na menor densidade de plantio. No caso da competição interespecífica, os resultados sugerem um efeito decisivo do sombreamento de Leguminosae sobre o comportamento da Cyperaceae. Os padrões de efeitos da competição pelos nutrientes foi determinado também pelas diferenças no recrutamento dos elementos do solo pelas espécies envolvidas.

scholarly journals Efeito do metribuzin no controle das plantas daninhas e na produção de grãos em Glycine max (L ) merrill

1991 ◽  
Vol 9 (1-2) ◽  
pp. 45-52 ◽  
Author(s):  
J. P. Silva Neto ◽  
N. F. Lopes ◽  
J. F. Silva ◽  
M. A. Oliva ◽  
L. R. Ferreira
Keyword(s):  
Glycine Max ◽  
Cynodon Dactylon ◽  
Cyperus Rotundus ◽  
Glycine Max L

No ano agrícola 1985/ 86, em Viçosa-MG, foi instalado um ensaio de campo em solo Pdzólico Vermelho-Amarelo argiloso e com 2,9% de matéria orgânica, objetivando estudar o efeito das doses de metribuzin (0,0; 0,35; 0,70 e 1,05 kg i.a.ha-1) no controle de plantas daninhas e na produtividade da soja (Geycine max (L.) Merri ll, cv. 'Uber aba'). A maioria das monocotiledôneas que ocorreram na area experimental foi represent ada por Cyperus rotundus L., Brachiaria plantaginea (Link) Hitch. e Cynodon dactylon (L.) Pers., tendo-se verificado somente redução em Brachiaria planta taginea em virtude do aumento das doses de metribuzin, ocorrendo o mesmo com relação às dicotiledôneas que se fizerem presentes no experimento, com exceção de Oxalis Oxyptera Prop., que não foi controlada nas doses utilizadas. A densidade total médias das invasoras, menos Cyperus rotundus , Oxalis oxyptera e Cynodon dactylon, foi de 141; 124; 62 e 59 plantas . m-2, respectivamente, para as doses de 0,0; 0,35 ; 0,70 e 1,05 kg i.a.ha-1 de metribuzin. A dose de 0,35 kg i.a. de metribuzin.ha-1 foi suficiente para promover a redução da matéria seca da parte aérea das plantas daninhas com a mesma eficiência de controle da dose de 1,05 kg i.a .ha-1 Entretanto, a densidade total médil das invasoras foi reduzida sig nificativamente nas doses de 0,70 e 1,05 kg i.a. de metribuzin.ha-l. O efeito do metribuzin na soja foi evidenciado somente na dose de 1,05 kg i.a.ha-1, com injúria foliar (clorose) leve ocorrida até 25 dias, aproximadamente, apôs a emergência das plântulas. Após esse período, houve total recuperação de todas as plantas de soja submetidas a essa dose. A produção de grão se o índice de colheita não foram influencia dos significativamente pelas doses de metribuzin.

scholarly journals PENGARUH JENIS DAN TINGKAT KERAPATAN GULMA TERHADAP PERTUMBUHAN DAN PRODUKSI KEDELAI (Glycine max [L]. Merr)

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Agatha Christia ◽  
Dad R.J. Sembodo ◽  
Kuswanta Futas Hidayat
Keyword(s):  
Glycine Max ◽  
Cyperus Rotundus ◽  
Glycine Max L ◽  
Asystasia Gangetica ◽  
Plot Design

Kedelai (Glycine max [L]. Merr.)merupakan salah satu komoditas pangan utama setelah padi yang mempunyai nilai ekonomi yang cukup tinggi, yaitu sebagai sumber protein nabati bagi kebutuhan pangan manusia. Setiap tahunnya produksi kedelai mengalami penurunan, salah satunya penyebabnya adalah gulma. Kehadiran gulma dapat menyebabkan kompetisi antara gulma dan tanaman kedelai untuk mendapatkan sarana tumbuh yang sama dan jumlahnya terbatas. Jenis dan kerapatan gulmamerupakan faktor penyebab terjadinya kompetisi antara gulma dan tanaman yang berpengaruh terhadap pertumbuhan dan produksi tanaman kedelai. Penelitian ini bertujuan untuk mengetahui pengaruh jenis gulma terhadap pertumbuhan dan produksi kedelai, pengaruh kerapatan gulma terhadap pertumbuhan dan produksi kedelai, serta pengaruh interaksi antara jenis dan kerapatan gulma terhadap pertumbuhan dan produksi kedelai. Penelitian ini menggunakan Rancangan Petak Berjalur (Strip Plot Design) dengan 3 kali ulangan secara faktorial.Faktor pertama adalah tiga jenis gulma yaitu Asystasia gangetica, Rottboellia exaltata, Cyperus rotundus. Faktor kedua adalah kerapatan gulma yaitu 0, 10, 20, 40, 80 tanaman/m 2 . Hasil penelitian menunjukkan bahwa gulma Rottboellia exaltata menurunkan jumlah daun 9 MST, bobot kering tajuk tanaman danjumlah polong kedelai, Cyperus rotundus menurunkan tinggi tanaman 9 MST dan bobot kering akar tanaman, dan Asystasia gangetica menurunkan terhadap tinggi tanaman 9 MST. Kerapatan 10 gulma/m 2 menekanbobot kering akar tanaman, dan kerapatan 80 gulma/m 2 menekan jumlah daun tanaman 9 MST. Antara jenis dan kerapatan gulma hanya terjadi interaksi dalam mempengaruhi tinggi tanaman kedelai 3 MST.

Prevalence of the pit and antipit in the genus Glycine

1987 ◽  
Vol 45 ◽  
pp. 986-987
Author(s):  
R. W. Yaklich ◽  
E. L. Vigil ◽  
W. P. Wergin
Keyword(s):  
Amino Acids ◽  
Endoplasmic Reticulum ◽  
Glycine Max ◽  
Seed Coat ◽  
Cell Types ◽  
Abaxial Surface ◽  
Legume Seed ◽  
Initial Report ◽  
Cone Cells ◽  
Glycine Max L

The legume seed coat is the site of sucrose unloading and the metabolism of imported ureides and synthesis of amino acids for the developing embryo. The cell types directly responsible for these functions in the seed coat are not known. We recently described a convex layer of tissue on the inside surface of the soybean (Glycine max L. Merr.) seed coat that was termed “antipit” because it was in direct opposition to the concave pit on the abaxial surface of the cotyledon. Cone cells of the antipit contained numerous hypertrophied Golgi apparatus and laminated rough endoplasmic reticulum common to actively secreting cells. The initial report by Dzikowski (1936) described the morphology of the pit and antipit in G. max and found these structures in only 68 of the 169 seed accessions examined.

PENGARUH PEMBERIAN PUPUK ORGANIK CAIR ASAL LIMBAH TERHADAP SERAPAN HARA SERTA PRODUKSI TANAMAN KEDELAI DI LAHAN GAMBUT

2017 ◽  
Vol 2 (02) ◽  
pp. 204-218
Author(s):  
Hendra Saputra ◽  
Intan Sari ◽  
Muhammad Arfah
Keyword(s):  
Glycine Max ◽  
Glycine Max L

Penelitian tentang pengaruh pemberian Pupuk organik cair (POC) asal limbah tumbuhan terhadap serapan hara N dan P serta produksi tanaman kedelai (Glycine max (L) Merrill) di lahan gambut telah dilaksanakan di kampus II Unisi Fakultas Pertanian Jl. Lintas Propinsi Parit 01, Desa Pulau Palas, Kecamatan Tembilahan Hulu, Kabupaten Indragiri Hilir Propinsi Riau. Dimulai dari bulan Agustus sampai bulan Oktober 2013. Tujuan dari penelitian ini untuk mendapatkan POC asal limbah tumbuhan yang terbaik untuk serapan hara N dan P serta produksi tanaman kedelai di lahan gambut. Penelitian ini menggunakan rancangan acak kelompok (RAK) faktor tunggal dengan 7 perlakuan dan 4 ulangan, 2 tanaman dijadikan sampel. Perlakuan dosis POC limbah tanaman pisang dan POC limbah sayur kol yang diberikan yaitu 0 L/Ha, 200 L/Ha, 400 L/Ha dan 600 L/Ha. Parameter pengamatan yaitu : serapan hara N dan P pada fase awal generatif, tinggi tanaman, jumlah bintil akar, polong hampa, produksi perplot, berat 100 biji dan brangkasan kering. Data pengamatan dianalisis dengan sidik ragam (ANOVA) dan dilanjutkan dengan Uji Lanjut Tukey HSD pada taraf 5%. Berdasarkan penelitian yang telah dilaksanakan dapat disimpulkan bahwa pemberian POC asal limbah tumbuhan tidak berpengaruh nyata terhadap serapan hara N dan P, tinggi tanaman, jumlah bintil akar, polong hampa, brangkasan kering tetapi berpengaruh nyata terhadap produksi perplot dan berat 100 biji.

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