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, Triadiati
Departemen Biologi, Fakultas Matematika Dan Ilmu Pengetahuan Alam, IPB University, Jln. Agatis Kampus IPB Dramaga, Bogor 16680 Telp (0251) 8622833 Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Medicine & Pharmacology Public Health

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Pertumbuhan dan Efisiensi Penggunaan Nitrogen pada Padi (Oryza sativa L.) Dengan Pemberian Pupuk Urea yang Berbeda Triadiati, Triadiati; Pratama, Akbar Adjie; Abdulrachman, Sarlan
BULETIN ANATOMI DAN FISIOLOGI dh SELLULA Vol 20, No 2 (2012): VOL XX, NOMOR 2, TAHUN 2012
Publisher : BULETIN ANATOMI DAN FISIOLOGI dh SELLULA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.232 KB) | DOI: 10.14710/baf.v20i2.4767

Abstract

Pupuk kimia nitrogen dalam bentuk urea sudah menjadi kebutuhan pokok petani khususnya di Indonesia, sehingga pemborosan dalam pemakaian urea tidak dapat dihindari. Pemahaman efisiensi penggunaan nitrogen (EPN) pada padi perlu diketahui agar dapat meningkatkan hasil gabah dan mengurangi polusi lingkungan akibat pemakaian pupuk N yang berlebihan. Tujuan dari penelitian ini melakukan kuantifikasi nilai EPN  pada padi. Penelitian dilakukan di persawahan dan rumah kaca. Penelitian di persawahan dilakukan di Balai Besar Penelitian Tanaman Padi (BB Padi)-Subang, Jawa Barat dan petani di sawah Bogor, Jawa Barat. Pupuk N (urea) yang diberikan di BB padi dan petani berurut adalah 225 dan 612,25 kg urea/ha, dengan luas petak percobaan 25 m2. Pada penelitian rumah kaca pupuk N (urea) yang digunakan adalah 200, 300, 400, 500 dan 600 kg urea/ha. Hasil penelitian menunjukkan bahwa Nilai EPN dan resorpsi pada padi yang ditanam di BB Padi lebih tinggi dibandingkan dengan padi yang ditanam di sawah petani. Nilai EPN dan resorpsi padi yang ditanam di rumah kaca tertinggi didapatkan pada perlakuan 500 kg urea/ha. Semakin tinggi ketersediaan nitrogen dalam tanah dan pemberian dosis pupuk N pada batasan tertentu akan menurunkan pertumbuhan tanaman, biomassa tanaman, hasil gabah, EPNT, EPNES, AEPN, PEPN dan resorpsi.
Growth and Development of Tristaniopsis merguensis Seedling Inoculated by Natural Ectomycorrhiza Triadiati, Triadiati; Hidayanti, Anastastia Raditya; Sukarno, Nampiah
Journal of Tropical Life Science Vol 10, No 2 (2020)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (292.185 KB) | DOI: 10.11594/jtls.10.02.01

Abstract

Tristaniopsis merguensis (pelawan tree) is a potential plant, however, it has not cultivated and conserved optimally due to slow growth and lack of information about the cultivation. The existence of T. merguensis in the forest is important because pelawan fungi grow under the tree, particularly in the above of the roots. Information about how to grow the T. merguensis seedling is very limited; therefore, research in growth and development of T. merguensis seedling was important. The aims of this study were to determine the appropriate planting medium for T. merguensis seed germination and to stimulate growth and development of T. merguensis seedling by using its fungi. Status of T. merguensis fungi was studied by analyzing root morphology. Fungi isolation was carried out from colonized root and fungi fruit body. The stimulated the growth of T. merguensis seedling was done by using fungi isolated from colonization root in laboratory scale, as well as treated at a different phosphate concentration. The result showed that T. merguensis was associated with ectomycorrhizal fungi. Planting medium consists of sawdust and T. merguensis fine root resulted the highest percentage of germination. Seedlings were treated with ectomycorrhizal fungi grew better than without ectomycorrhizal fungi. In addition, seedlings treatment with ectomycorrhizal fungi and phosphate 25% showed the highest growth rate. 
Karakteristik Lahan Bera Dengan Umur Berbeda dan Pengaruhnya Terhadap Dekomposisi Serasah di Manokwari, Papua Barat Susanto, Slamet Arif; Qayim, Ibnul; Triadiati, Triadiati
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 45, No 2 (2021)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v45n2.2021.117-132

Abstract

Abstrak. Karakteristik umur lahan bera memiliki peran penting dalam pengembalian hara melalui proses dekomposisi. Penelitian dekomposisi serasah dan cadangan karbon pada beberapa umur lahan bera telah dilakukan di Manokwari, Provinsi Papua Barat dari Juli 2020 sampai Januari 2021. Penelitian bertujuan menganalisis proses dekomposisi in situ serasah daun vegetasi lokal pada beberapa umur lahan bera, serta mengukur cadangan karbon dari vegetasi masing-masing lahan bera. Setiap umur lahan bera dipasang sebanyak 18 kantung serasah yang masing-masingnya berisi 20 g serasah daun dari vegetasi lokal lahan bera. Sebanyak tiga kantung serasah diambil setiap bulan dari masing-masing umur lahan bera, kemudian dikeringkan hingga bobot kering konstan. Cadangan karbon biomassa vegetasi dianalisis menggunakan persamaan alometrik berdasarkan diameter pohon setinggi dada (dbh). Hasil penelitian menunjukkan bahwa kehilangan bobot serasah setelah 6 bulan dekomposisi pada lahan bera 5, 10, dan 15 tahun masing-masing mencapai 92,62%; 94,00%; dan 97,12%. Konstanta dekomposisi (tetapan kehilangan bobot serasah) pada lahan bera 5 dan 10 tahun tergolong rendah yakni 0,65 dan 0,94. Lahan bera 15 tahun memiliki konstanta dekomposisi yang tergolong sedang yakni 1,18. Cadangan karbon pada lahan bera 5, 10, dan 15 tahun masing-masing sebesar 7,57; 32,63; dan 141,33 ton/ha. Penurunan rasio C/N setelah 6 bulan dekomposisi pada lahan bera 5, 10, dan 15 tahun masing-masing sebesar 66,67%; 56,25%; dan 39,39%. Dekomposisi serasah pada lahan bera 5 tahun dipengaruhi oleh curah hujan, sedangkan pada lahan bera 15 tahun dipengaruhi oleh kelembapan tanah. Penelitian ini mengindikasikan bahwa umur lahan bera menyebabkan perbedaan komposisi vegetasi, sehingga berpengaruh pada proses dekomposisi dan banyaknya cadangan karbon. Abstract. The characteristics of the fallow land have an important role in the return of nutrients through decomposition process. Research on litter decomposition and carbon stock on different ages of fallow has been carried out in Manokwari, West Papua from July 2020 to January 2021. The aim of the study was to analyze the in situ decomposition process of leaves litterfall from local vegetation at several ages of fallow, and also measure the biomass carbon stock of each fallow land. A total 18 litterbags were installed, each containing 20 g leaves litterfall from the local vegetation of the fallow land. Three litter bags from each age fallow were taken every month and dried to constant mass. Biomass carbon stocks were analyzed using an allometric equation based on the diameter of the trees at breast height (dbh). The results showed that the litter mass loss at fallow 5, 10, and 15 years were 92.62%; 94.00%; and 97.12% respectively after 6-month decomposition. The slowest decay constants (constants of litter mass loss) were 0.65 and 0.94 at fallows 5 and 10 years respectively, whereas at fallow 15 years with k 1.18. Carbon stocks in fallow land of 5, 10, and 15 years were 7.57; 32.63; and 141.33 ton/ha, respectively. The decrease of C/N ratios at fallow 5, 10, and 15 years were 66.67%; 56.25%; and 39.39% respectively after 6 month decomposition. Litter decomposition was influenced by local rainfall on fallow land at 5 years old and soil moisture at 15 years old. This study indicates that the age of fallow lands lead to differences in the composition of vegetation, so that it affects decomposition process and the amount of carbon stocks.
Nitrogen Resorption and Nitrogen Use Efficiency in Cacao Agroforestry Systems Managed Differently in Central Sulawesi TRIADIATI TRIADIATI; SOEKISMAN TJITROSEMITO; EDI GUHARDJA; SUDARSONO SUDARSONO; IBNUL QAYIM; CHRISTOPH LEUSCHNER
HAYATI Journal of Biosciences Vol. 14 No. 4 (2007): December 2007
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.519 KB) | DOI: 10.4308/hjb.14.4.127

Abstract

Cacao agroforestry is a traditional form of agriculture practiced by the people of Central Sulawesi. These agroforestry systems vary from a simple system following selective cutting of forest trees, to a more sophisticated planting design. The cacao was planted under remaining forest covers (CF1), under planted trees (CF2), and between shade trees Gliricidia sepium (CP). The objectives of this study were to quantify nitrogen use efficiency (N NUE) and nitrogen resorption in cacao agroforestry systems. The N NUE at the ecosystem scale (N NUEES) for the cacao agroforestry systems were compared with the natural forest. The results showed that CP produced the highest litterfall and cacao foliar nitrogen. CP and CF1 produced litterfall and the nitrogen resorption that not were significantly different. In contrast, CF2 produced the lowest litterfall, hence required lower nitrogen supply. The nitrogen resorption of CF2 was less than that of CF1 and CP. However, N NUE in cacao plant (N NUEC) of CF2 was higher than that of the CP. The N NUEES of either CF1 or CF2 were similar to that of the natural forest, but higher than that of the CP. Using shade trees in cacao plantations increased foliar nitrogen concentration, nitrogen resorption, N NUEC and N NUEES; thus, might be one reason for a higher productivity of cacao in unshaded systems. Key words: cacao agroforestry system, cacao foliar nitrogen, nitrogen resorption, N NUE
Land with low pH soil spread widely in Indonesia can be used for soybean (Glycine max) cultivation, although the production is low. The use of acid tolerant soybean and acid-Al tolerant nitrogen-fixing bacteria was an alternative way to increase soybean productivity on acid soils. This research was conducted to study the influence of acid-Al tolerant Bradyrhizobium  japonicum  on growth of Slamet cultivar soybean planted on acid soils in greenhouse. Three strains of acid-Al tolerant B. japonicum ANGELIA REZTY FITRIANI SITUMORANG; NISA RACHMANIA MUBARIK; TRIADIATI TRIADIATI
HAYATI Journal of Biosciences Vol. 16 No. 4 (2009): December 2009
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.16.4.157

Abstract

Land with low pH soil spread widely in Indonesia can be used for soybean (Glycine max) cultivation, although the production is low. The use of acid tolerant soybean and acid-Al tolerant nitrogen-fixing bacteria was an alternative way to increase soybean productivity on acid soils. This research was conducted to study the influence of acid-Al tolerant Bradyrhizobium  japonicum  on growth of Slamet cultivar soybean planted on acid soils in greenhouse. Three strains of acid-Al tolerant B. japonicum, i.e. BJ 11 (19), BJ 11 (5), and BJ 11 (wt), were used in this experiment. The result showed that inoculation of all acid-Al tolerant B. japonicum strains could increase plant height, shoot and root weight, number of flowers, pods, seeds, seeds dry weight, and shoot and seed nitrogen content.                   Key words: Bradyhizobium japonicum, acid-aluminium tolerant, soybean, Slamet cultivar
Increasing Hermaphrodite Flowers using Plant Growth Regulators in Andromonoecious Jatropha curcas . DASUMIATI; . MIFTAHUDIN; . TRIADIATI; ALEX HARTANA; DIBYO PRONOWO
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1272.747 KB) | DOI: 10.4308/hjb.21.3.111

Abstract

Jatropha curcas (JC) is a crop with potential for use in biodiesel. Production of biodiesel requires plant seed as raw material, so the viability of JC for use in biodiesel will dependent greatly on the plant’s production of flowers. Generally, this plant is monoecious, meaning it has both male and female flowers. However, very rarely JC plants may be andromonoecious. Andromonoecious specimens of JC produce hermaphrodite and male flowers in the same plant. The number of hermaphrodite flowers per inflorescence is generally low compared to the number of male flowers. The aim of this study was to increase the proportion of hermaphrodite flowers by using plant growth regulators (PGRs) in andromonoecious JC. Our experiment was conducted in Randomized Block Design (RBD) with 9 treatments, namely kinetin, GA3, and IAA with concentrations of 0 ppm as a control, 50 and 100 ppm of each PGRs. The treatments were applied to stem cuttings from each plant and repeated 4 times. PGRs were applied by spraying the leaves within the buds of each plant. Applications took place weekly beginning when the plants entered flower initiating phase, until inflorescence produced. Observations were conducted during the treatment period (10 weeks). Results showed that plants treated with IAA, GA3, and kinetin at 50 and 100 ppm produced increased inflorescence per plant. The increases measured were 155.4 and 92.9% of (IAA), 120.4 and 151% (GA3), 96.6 and 51.7% (kinetin) respectively. In addition we found that application and GA3 at concentrations of 50 and 100 ppm, and kinetin at 50 ppm, increased the number of hermaphrodite flowers per inflorescence by 50%, and increased the number of hermaphrodite flowers per plant by 275.6 and 183.1% (IAA), 219.5 and 254.1% (GA3), 162.9 and 103.1% (kinetin) respectively. As would be expected, the number of fruit per plant increased in those specimens treated with IAA, GA3, and kinetin at 50 and 100 ppm. The increases measured were 301.7 and 167.4% (IAA), 211.7 and 257.0% (GA3), 162.5 and 101.4% (kinetin) respectively.
Fine Root Production and Decomposition in Lowland Rainforest and Oil Palm Plantations in Sumatra, Indonesia Violita Violita; Triadiati Triadiati; Iswandi Anas; Miftahudin Miftahudin
HAYATI Journal of Biosciences Vol. 23 No. 1 (2016): January 2016
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (871.548 KB) | DOI: 10.4308/hjb.23.1.7

Abstract

Transformation of tropical rainforest into oil palm plantation not only has impacts on biodiversity but also affects ecosystem functions such as production and decomposition of fine roots as a nutrient source for plant. The objective of the research was to evaluate the production and decomposition rate of fine roots in natural forest (NF) at Bukit 12 National Park and oil palm plantation (OP) in Jambi, Sumatra. The soil core and litter bag methods were used to obtain fine root production and decomposition data. The results showed that generally, there was the same pattern in fine root production between NF and OP. The annual fine root productivity was found to be higher in NF than that of OP. Rainfall in NF and air temperature in NF and OP were the most significant climate factors affecting fine root production. The remaining fine root biomass decreased as the incubation time increased. The decomposition rate constant (k value) was significantly higher in NF than in OP. Our data showed that the nutrient turn-over of NF fine roots was faster than of OP fine roots. Nitrogen, carbon content, and C/N ratio were the main factors that influenced fine root decomposition.
Photosynthesis and Transpiration Rates of Rice Cultivated Under the System of Rice Intensification and the Effects on Growth and Yield Nurul Hidayati; . Triadiati; Iswandi Anas
HAYATI Journal of Biosciences Vol. 23 No. 2 (2016): April 2016
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (503.222 KB) | DOI: 10.4308/hjb.23.2.67

Abstract

The system of rice intensification (SRI) crop management method has been reported by many authors to significantly increase rice yield with lower inputs, but physiological bases of yielding improvement has not been studied. In this research we assessed some physiological parameters and the mechanism of rice yield improvement of rice plants under SRI cultivation method during both vegetative and generative phases compared to conventional rice cultivation methods. We measured photosynthetic rate, transpiration rate, leaf temperature, chlorophyll content, N and P uptake, plant growth parameters and yield for those comparison. SRI methods significantly increased both vegetative and reproductive (generative) parameters of rice plants compared to conventional cultivation methods. Photosynthetic rate, chlorophyll content, N and P uptake under SRI cultivation were significantly higher compared to those of the conventional rice cultivation, but no differences were found in transpiration rate and leaf temperature. With SRI method, plants in their generative phase (especially in the grain-filling phase) had the highest photosynthetic and the lowest transpiration rates. Grain yield under SRI method was significantly higher (ca. 24%) than that of conventional method.
Physiological Character of Merremia peltata (L.) Merrill from Bukit Barisan Selatan National Park Lampung Yuke Mardiati; Triadiati Triadiati; Soekisman Tjitrosoedirdjo
HAYATI Journal of Biosciences Vol. 25 No. 1 (2018): January 2018
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.44 KB) | DOI: 10.4308/hjb.25.1.25

Abstract

Merremia peltata invaded the vegetation of Bukit Barisan Selatan National Park (BBSNP) in Lampung Province, Indonesia. In this site, the invasion has reached more than 7000 hectares. Therefore, it is necessary to asses the physiological characters of M. peltata as an invasive plant species under different shading level in BBSNP. The experiment design of this study was split block design with factorial. The first factor (main plot) was shading treatment that consisted of 0, 55, and 90% shades. The second factor (sub plot) was 3 species of plant that consisted of M. peltata, Mikania micrantha, and Ipomoea batatas. Each experimental unit was replicated 3 times. The result showed that the physiological characters such as carbon fixation rate (CFR), relative growth rate (RGR), leaf area ratio (LAR), photosynthetics nitrogen use efficiency (PNUE) of M. peltata higher than the other two species and interconnected. Physiological characters associated with RGR can be supporting the invasiveness of M. peltata, especially in BBSNP.  Supporting invasiveness with resources allocation to leaves biosynthesis and relatively efficient nitrogen were used for photosynthesis.
Rooting System of Rice Cultivated under System of Rice Intensification (SRI) Method which Improving Rice Yield Nurul Hidayati; Triadiati Triadiati; Iswandi Anas
HAYATI Journal of Biosciences Vol. 25 No. 2 (2018): April 2018
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (319.547 KB) | DOI: 10.4308/hjb.25.2.63

Abstract

The development of plant roots is known to play a very important role in the uptake of water and nutrients by rice plants. However, there are few studies on what changes, if any, are induced in the rooting systems of rice plants under System of Rice Intensification (SRI) management. This research evaluated changes of rice roots with SRI method compared to conventional method of irrigated rice cultivation and assessed influences that could improve rice yield. Under SRI management, plant roots were significantly longer and heavier than with conventional method. SRI method also increased the number of root hairs by 60%, and root hairs were healthier and more vigorous compared with conventional method. However, root respiration was not different in the two methods. There was less formation of aerenchyma (air pockets) in rice roots with SRI method, as both the number and size of root aerenchyma were lower with SRI than with conventional method. The SRI method was able to improve the root length, root dry weight compared to the conventional method. The SRI method was also able to increase the number of root hairs by 60% compared with the conventional method. Eh measurements in the soil with SRI method were higher than with conventional method. However, there was no significant different in root respiration. The aerenchyma formation of rice roots in SRI method was lower than conventional method.
Co-Authors Akbar Adjie Pratama ALEX HARTANA ANGELIA REZTY FITRIANI SITUMORANG Ani Sulistiyani Arie Aryanto Christoph Leuschner Dasumiati Dasumiati Delfi Trisnawati DIANA AGUSTIN CAROLINA DIBYO PRONOWO Dyah Iswantini Edi Guhardja Hadi Susilo Hamim Hamim Hidayanti, Anastastia Raditya IBNUL QAYIM Iswandi Anas Iswandi Anas Iswandi Anas Kurniati Kurniati Lady Diana Tetelepta Laksmi Puspitasari Melisnawati H. Angio Miftahudin . Muliyah, Evi MUTTAQIN, MAFRIKHUL Nampiah Sukarno Nelly Saidah Amalia NISA RACHMANIA MUBARIK Nurul Hidayati Nurul Hidayati Rani Apriyani Raharja Resti Wahyuni RIKA RAFFIUDIN Rismayanti Sarlan Abdulrachman Selis Meriem Slamet Susanto SOEKISMAN TJITROSEMITO Soekisman Tjitrosoedirdjo Sonya Tobing Subaryanti Subaryanti Subaryanti Subaryanti Subaryanti Sudarsono Sugiyanta Sulistijorini Syamsul Falah Utut Widyastuti Violita Violita Yoan Ramasita Yohana C. Sulistyaningsih Yohana Caecilia Sulistyaningsih Yuke Mardiati