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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Planta Tropika Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Margaret, Swisci
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Engineering

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Diversity and Allelopathic Potential of Weeds in Swampland Sujinah, Sujinah; Margaret, Swisci; Agustiani, Nurwulan; Ningsih, Rina Dirgahayu; Rumanti, Indrastuti Apri
PLANTA TROPIKA Vol 11, No 2 (2023)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v11i2.16491

Abstract

Weeds are plant disturbing organism that affect yields through competition and allelopathy. However,  not much is known about weed diversity in swamps, so research is needed to identify their types and compounds as a weed control strategy. This study was conducted using a survey method from January to March 2020 at the Barito Kuala District, South Kalimantan. Thirty villages were randomly selected from each of the eight chosen subdistricts. Out of the twenty-six weed species identified, there were ten species of grasses, seven sedges, and nine broadleaves. The results showed that the weed species were dominated by Cyperus halpan, Eleocharis dulcis, and Cynodon dactylon (L.), with an SDR of 23.46, 16.73, and 10.03, respectively. The analysis of GC-MS showed that the weeds contained four similar compounds: neophyte diene, palmitic acid, linoleic acid, and stigmasterol. The largest compound content in C. halpan was diisocotyl phthalate (48.49%), while in E. dulcis and C. dactylon the largest were o-phthalic acid and mono-2-ethylhexyl-ester (69.36 and 40.23%). Moreover, weed allelochemicals are classified into fatty acids, steroids, esters, and other volatile compounds, where some have the potential for allelopathy that inhibits crop growth. 
Effect of Drought Periods on Rice Lines Growth and Yield Margaret, Swisci; Nafisah, Nafisah; Sujinah, Sujinah; Rumanti, Indrastuti Apri; Yunani, Nani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.49-59

Abstract

Numerous variables, such as drought period, growth stage, and varieties, influence rice growth and yield in response to drought. This study was conducted to determine the effect of drought periods on the growth and yields of several rice lines and varieties as well as to select drought-tolerant lines. Using a split-plot design with three replications, the pot experiment was carried out in the greenhouse from December 2015 to April 2016 at the Sukamandi Experimental Site of Indonesian Center for Rice Research (BB Padi). Drought periods were treated as the main-plot, while the rice lines/varieties were treated as sub-plots. The main-plot consists of four levels: control, drought at the maximum tillering stage, drought at the primordia stage, and drought at the grain filling stage. The rice lines used are expand lines of rainfed lowland rice and upland rice from the BB Padi breeding program. The results showed that of the 36 rice lines and 6 varieties tested, drought periods during maximum tillering and primordia affected plant height, while the tiller number was not affected by all drought periods. From the yield characters, drought periods increased unfilled grain percentage and decreased 1000 grains weight and also grain weight per plant. Jatiluhur is consistently tolerant and has the highest yield. There are 8 rice lines with consistent tolerance and not significantly different yields with Jatiluhur: B13650E-TB-80-2, B14168E-MR-6, B14168E-MR-10, B14168E-MR-11, B14168E-MR-12, B14168E-MR-13, B12480D-MR-7-1-1, and B12056F-TB-1-29-1. Keywords:  Drought periods, Rice lines,  Growth, Yield 
Pola Tanam Padi untuk Produktivitas Tinggi dan Indeks Pertanaman yang Optimal di Lahan Rawa Pasang Surut Gunawan, Indra; Margaret, Swisci; Sujinah, Sujinah; Agustiani, Nurwulan
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 50 No. 3 (2022): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.026 KB) | DOI: 10.24831/jai.v50i3.40983

Abstract

Optimalisasi penggunaan lahan rawa pasang surut untuk meningkatkan produktivitas dan hasil padi dapat dilakukan dengan peningkatan indeks pertanaman (IP). Penelitian ini dilakukan untuk mendapatkan informasi peluang peningkatan indeks pertanaman melalui penggunaan varietas unggul baru padi. Penelitian dilaksanakan pada Januari-Desember 2019 di Desa Sukaraja, Kabupaten Banyuasin, Sumatera Selatan dengan menguji tiga kombinasi pola tanam yang diulang empat kali. Perlakuan pola tanam yaitu: P1: Regas (musim tanam /MT 1)-Regas (MT 2); P2: Inpara 2 (MT 1)-Inpara 2 (MT 2); P3: Inpara 2 (MT 1)-Inpari 19 (MT 2)-Inpari 19 (MT 3). Regas adalah varietas lokal yang umum ditanam petani, Inpara 2 adalah varietas unggul baru (VUB) adaptif lahan rawa, dan Inpari 19 adalah VUB berumur genjah. Budidaya yang diterapkan yaitu Rawa Pasang Surut Intensif, Super, dan Aktual (RAISA). Pengamatan dilakukan terhadap karakter pertumbuhan dan hasil, serta perbandingan hasil antar pola tanam. Pola tanam padi-padi dengan VUB adaptif rawa (Inpara 2) merupakan pola tanam dengan hasil tertinggi sebesar 11.35 ton ha-1 GKG atau 34.6% lebih tinggi dibanding padi lokal. Indeks pertanaman di lahan rawa pasang surut berpeluang ditingkatkan menjadi tiga kali tanam pada kondisi curah hujan tahunan tinggi dengan didukung pendekatan varietas hasil tinggi dan umur pendek. Kata kunci: budidaya lahan rawa, optimalisasi lahan, padi rawa, pola tanam, RAISA
Utilization of amelioration and bioremediation to reduce Al stress in upland rice “Inpago 12” Pratiwi, Gagad Restu; Gunawan, Indra; Margaret, Swisci; Nurrahma, Arinal Haq Izzawati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 51 No. 2 (2023): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/ija.v51i2.47645

Abstract

The contribution of rice production in drylands (upland rice) to national rice production is still low, due to several limiting factors including limited water, low pH, and low soil fertility. This study aimed to obtain improved recommendations for amelioration and bioremediation in drylands with Al stress to enhance rice production. The upland rice variety of Inpago 12 was planted at Taman Bogo Experimental Farm, East Lampung in the first planting season of 2020. The experiment was arranged in a split-plot design with three replications. The main plot was the application of amelioration materials consisting of control (without amelioration), CaMg(CO3)2, CaCO3, and rock phosphate. The subplot was the application of bioremediation materials consisting of control (without bioremediation), biofertilizer, endophytic microbes, and citric acid. Results showed that amelioration and bioremediation on dry land with low to moderate Al stress and high Al stress did not significantly increase the growth of rice plants. However, bioremediation in the form of citric acid on land with low to moderate Al stress significantly increased grain production by 6.21% than without bioremediation. Keywords: Aluminium, dryland, limited water, rice production, low soil fertility, low pH
Co-Authors Agustiani, Nurwulan Arinal Haq Izzawati Nurrahma Gagad Restu Pratiwi, Gagad Restu Indra Gunawan Indrastuti Apri Rumanti Nafisah Nafisah Nani Yunani, Nani Ningsih, Rina Dirgahayu Sujinah Sujinah