Effect of sorbitol concentration on regeneration of embryogenic calli in upland rice varieties (Oryza sativa L.)

Abstrak Evaluasi karakter morfologi akar telah dilakukan untuk menentukan karakter morfologi akar yang potensial sebagai indikator adanya kekurangan air pada padi (Oryza sativa L.) di antara panjang akar, volume akar, berat basah akar, berat kering akar, rasio akar:tajuk dan rasio panjang akar:tinggi tanaman. Eksperimen ini dilakukan di rumah kaca dan menggunakan 2 varietas padi (Superwin dan IR 64) pada fase vegetatif yang ditumbuhkan pada media tanah di polybag dengan perlakuan kekeringan (tidak disirami selama 14 hari) dan disirami sampai kapasitas lapang (kontrol). Panjang akar dan rasio panjang akar:tinggi tanaman dapat dijadikan indikator kekurangan air pada padi Superwin dan IR 64. Superwin yang merupakan padi sawah dapat dipertimbangkan untuk ditanam di lahan kering. Kata kunci: indikator, kekeringan, morfologi akar Abstract Root-morphological characters in rice (Oryza sativa L.) were evaluated to determine the potential characters as water-deficit indicators among the length, volume, fresh weight, dry weight, ratio root:shoot and ratio root length:plant height. The experiment was conducted in the glasshouse using 2 rice varieties (cv. Superwin and IR 64) grown in the soil mixture at the vegetative phase. The treatments in this experiment were water deficit (without water for 14 days) and well-watered (watering until field capacity). The root length and ratio root length:plant height were potential as water- deficit indicators in Superwin dan IR 64. The upland rice, Superwin, should be considered to be cultivated in the water limited area. Keywords: drought, indicator, root morphology

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Weed dynamics and yield of direct seeded upland autumn rice (oryza sativa l.) Varieties as influenced by integrated weed and nutrient management practices

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-4938 ◽

2018 ◽

Author(s):

G Goswami ◽

N C. Deka ◽

N J Ojha

Keyword(s):

Oryza Sativa ◽

Management Practices ◽

Nutrient Management ◽

Upland Rice ◽

Oryza Sativa L ◽

Block Design ◽

Rice Varieties ◽

Randomized Block Design ◽

Direct Seeded ◽

Weed Dynamics

A field experiment was conducted during autumn, 2014 at ICR Farm, Assam Agricultural University, Jorhat, Assam to compare three different direct seeded upland rice varieties along with different integrated weed and nutrient management practices. The experiment was carried out in factorial randomized block design replicated thrice with 15 treatments involving 3 varieties: Inglongkiri, Maizubiron and Rasi along with 5 treatments of weed and nutrient management,

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Comparative studies of upland and swamp rice varieties (Oryza sativa L.) II. Effect of varying supply of manganese on growth and yield

The Journal of Agricultural Science ◽

10.1017/s0021859600065539 ◽

1968 ◽

Vol 71 (1) ◽

pp. 15-17

Author(s):

B. A. C. Enyi

Keyword(s):

Oryza Sativa ◽

Upland Rice ◽

Oryza Sativa L ◽

Dry Weight ◽

Growth And Yield ◽

Flooded Soil ◽

Rice Varieties ◽

Plant Grown ◽

Moisture Saturation ◽

Total Dry Weight

SummaryUpland rice (Agbede) and swamp rice (BG 79) varieties grown on flooded soil, and on soil maintained at 80 and 100% moisture saturation were sprayed with solutions containing 0 ppm (MO), 10 ppm (Ml), and 20 ppm (M2) of manganese.The M 2 treatment depressed total dry weight and dry weights of leaf laminae, stems, leaf sheaths and root of both varieties grown on soil maintained at either 80 or 100% moisture saturation. The M 1 treatment increased the ear weight of Agbede grown on soil maintained at either 80 or 100% moisture saturation, while the M 2 treatment increased the ear weight of plant grown on saturated soil. In flooded soil both the M 1 and M 2 treatments significantly increased dry weight of Agbede plants, but only the M 2 treatment increased ear dry weight of BG 79. The ear weight of Agbede plants receiving M 0 and M 1 treatment decreased with increasing soil moisture while that of BG 79 increased.It is considered that manganese supply limits yield of Agbede grain grown on flooded soil.

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Pengaruh Pemberian Pupuk Kompos Jerami terhadap Pertumbuhan Dua Varietas Padi Gogo (Oryza sativa L.) pada Tanah Ultisol

Jurnal Ilmiah Mahasiswa Pertanian ◽

10.17969/jimfp.v4i2.11056 ◽

2020 ◽

Vol 4 (2) ◽

pp. 61-70

Author(s):

Faridah Faridah ◽

Erida Nurahmi ◽

Nurhayati Nurhayati

Keyword(s):

Oryza Sativa ◽

Plant Height ◽

Upland Rice ◽

Oryza Sativa L ◽

Dry Weight ◽

Rice Varieties ◽

Split Plot ◽

Two Factors ◽

Number Of Leaves ◽

Plot Design

Abstrak. Penelitian ini dilaksanakan diTaman Teknologi Pertanian (TTP) Jantho Kecamatan Kota Jantho, Kabupaten Aceh Besar, dan Laboratorium Fisiologi Tumbuhan Fakultas Pertanian Universitas Syiah Kuala, yang berlangsung sejakbulan Agustus hingga Desember 2016. Penelitian ini menggunakan rancangan petak terpisah (split plot design), dengan dua faktor yaitu dosis pupuk kompos jerami dan varietas. Dosis pupuk kompos jerami menjadi petak utama yang terdiri atas 3 taraf yaitu (kontrol, 10 dan 20 ton ha-1), varietas menjadi anak petak yang terdiri atas 2 taraf yaitu (Situ Patenggang dan Sanbei). Peubah yang diamati meliputi tinggi tanaman, jumlah daun, jumlah anakan, dan berat berangkasan kering. Perlakuan dosis pupuk kompos jerami berpengaruh sangat nyata terhadap tinggi tanaman pada umur 4 dan 8 MST. Perlakuan varietas berpengaruh sangat nyata terhadap jumlah daun pada umur 4 dan 8 MST. Terdapat interaksi antara kompos jerami dan varietas terhadap jumlah anakan, jumlah daun dan berat berangkasan kering. Dosis pupuk kompos jerami yang terbaik terhadap pertumbuhan padi gogo pada tanah ultisol adalah 20 ton ha-1. Pertumbuhan padi gogo terbaik pada tanah ultisol dijumpai pada varietas sanbei. Kombinasi terbaik terhadap pertumbuhan padi gogo pada tanah ultisol adalah dosis pupuk kompos jerami 20 ton ha-1 dengan varietas sanbei.The Effect of Straw Compost Fertilizer on the Growth of Two Gogo Rice Varieties (Oryza sativa L.) in Ultisol SoilAbstract. This research was conducted in the Agricultural Technology Park (ATP) of Jantho, Kota Jantho Subdistrict, Aceh Besar Regency, and Laboratory of Plant Physiology at the Faculty of Agriculture, Syiah Kuala University, which lasted from August to December 2016. The study used a split plot design, with two factors are doses of straw compost fertilizer and varieties. The doses of straw compost became the main plot consisting of 3 levels, namely (control, 10 and 20 tons ha1), the varieties being subplots consisting of 2 levels namely (Situ Patenggang and Sanbei). The variables observed included plant height, number of leaves, number of tillers, and dry weight. The treatment of straw compost doses significantly affected plant height at age 4 and 8 WAP. The treatment of varieties had a very significant effect on the number of leaves at ages 4 and 8 WAP. There were interactions between straw compost and varieties on the number of tillers, number of leaves and weight of dry stover. The best dose of straw compost for padigogo growth in ultisol soil is 20 tons ha-1. The best growth of upland rice on ultisol soil was found in sanbei varieties. The best combination of the growth of upland rice on ultisol soil is the dose of straw compost fertilizer 20 tons ha-1 with varieties of sanbei.

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