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Pengaruh Panjang Hari, Asam Indol Asetat, dan Fosfor terhadap Tanaman Kedelai dan Kualitas Benih dalam Penyimpanan Rudi Hartawan; Zainal Ridho Djafar; Zaidan Panji Negara; Mery Hasmeda; , Zulkarnain
Indonesian Journal of Agronomy Vol. 39 No. 1 (2011): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of this study was to investigate the effect of photoperiod, indole acetic acid (IAA), and phosphorus on soybean plant growth and seed quality during storage. The trial was carried out at Sebapo Experimental Station, Jambi, Center for Post Harvest Research and Development, The Ministry of Agriculture and Center for Forest Research and Development, The Ministry of Forestry, Bogor from November 2009 until June 2010. Split-split plot design was used consisted of three factors, i.e. photoperiods (12 and 14 hours 54 minutes) as the main plot, concentrations of IAA (0, 75, and 150 ppm) as subplot, and dosages of phosphorus (0, 60, and 120 kg P2O5 ha-1) as subplot. The result showed that photoperiod, IAA, and phosphorus application had significantly improved production and seed quality. The path analysis showed that the weight of 1,000 seeds affected other variables. The seed protein content has the largest path coefficient compared to other variables. The treatment of mother plant with 14 hours 54 minutes photoperiod combined with IAA of 150 ppm and P2O5 of 120 kg ha-1 resulted in the highest seed quality during 90 days of storage in room temperature.

Estimasi Populasi dan Habitat Tarsius Sumatera (Tarsius bancanus bancanus) Andrios Sesa; Indra Yustian; Zaidan P. Negara
Jurnal Penelitian Sains Vol 17, No 1 (2014)
Publisher : Faculty of Mathtmatics and Natural Sciences

Remnant forests of PT. Suryabumi Agrolanggeng and surrounding traditional rubber plantations need to be managed as habitat for some wildlife as well as an important region for the company's activities. Tarsier which is one of the protected wildlife inhabit the area has the potential to become a "flagship species" in the frame of environmental management efforts of the Company. This study was aimed to estimate the ab-undance and habitat of tarsiers in such area. The study sites consist of forested area of PT. Suryabumi Agro-langgeng forests (study site-1) and the traditional rubber plantations managed by local people (study site-2). The estimated abundance of tarsier in both sites were respectively 0,25 ind/ha and 0,08 ind/ha. Plant species found are 18 species of 14 families and 23 species of 15 families. Potential number of insects as tarsier prey are 20 species of 14 families. SWOT analysis approach to internal and external factors showing High Conservation Values (HCV) of the forested area of PT. Suryabumi Agrolanggeng (study site-1) and could lead the determina-tion of the status of such area as a conservation area.

Analisis Vegetasi di Kawasan Terbuka Hijau Industri Gasing Siti Indah Oktaviani; Laila Hanum; Zaidan P Negara
Jurnal Penelitian Sains Vol 19, No 3 (2017)
Publisher : Faculty of Mathtmatics and Natural Sciences

Penelitian bertujuan untuk mengetahui keanekaragaman vegetasi di kawasan terbuka hijau industri Gasing. Penelitian dilakukan dari bulan April - Juli 2017. Metode analisis mengunakan metode kuadrat den-gan 2 plot pada lokasi yang berbeda dengan tiga kali pengulangan, analisa data kuantitatif dilakukan terhadap nilai kerapatan, dominasi, frekuensi, nilai penting dan indeks keanekaragaman masing-masing jenis tumbuhan. Hasil penelitian menunjukan bahwa vegetasi terdiri dari 16 suku dan 19 jenis, didominasi oleh Pteridophyta dan Spermatophyta. nilai keanekaragaman vegetasi sebesar (2,24) dan nilai keseragaman 0,30. Semakin ting-gi jumlah jenis maka semakin tinggi indeks keanekaragaman suatu jenis. Karakteristik yang demikian disebab-kan oleh pengaruh lingkungan yang dimiliki seperti kandungan bahan organik dan pH rendah serta faktor yang berasal campur tangan manusia.

Seed Quality of Paddy Variety (Oryza sativa L.) Resistant to Vegetative Phase Drought Stress Winggi Anggun Jati; Zaidan Panji Negara; Firdaus Sulaiman
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.538

Drought is an abiotic stress that can affect paddy yields by inhibiting growth, thereby reducing the quality of the seeds produced. This study aimed to find out the best seed quality of several paddy varieties produced from the plants experiencing drought stress in the vegetative phase. The varieties used in the study were Inpago 12, Unsoed 1, Inpago 4, Inpago 5, Inpago 9, Inpago 8, Inpago 10, Inpara 8, Inpara 9, Rindang 1, Rindang 2, Situ Patenggang, Towuti, and Batu Tegi. The drought stress was applied to the vegetative phase of the plant by reducing the intensity of water supply (63.5% moisture content), then the resulting seeds were tested in the laboratory. The results of the study showed that the highest seed quality value in the drought stress treatment of the vegetative phase were the Inpara 8 variety, followed by the Towuti variety with 93.33% and 88% germination values, 82.67% and 70% simultaneous growth, 12.11% and 8.44% germination rate, 64% and 64% germination strength, and 18.99 and 16.83 vigor indexes. Meanwhile, the lowest seed quality was the Inpago 8 variety with 26% germination value, 21.33% simultaneous growth, 1.33% germination speed, 3.33% germination strength, and 2.71 vigor index. Among all the varieties tested, the Inpara 8 and Towuti are those with the best seed quality values after experiencing drought stress during the vegetative phase.

Depth of Water-Substrate Interface in Floating Culture and Nutrient-Enriched Substrate Effects on Green Apple Eggplant Karla Kasihta Jaya; Benyamin Lakitan; Zaidan Panji Negara
AGRIVITA, Journal of Agricultural Science Vol 41, No 2 (2019)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i2.2235

A successful development of low cost floating culture system (FCS) has opened an opportunity for local farmers to cultivate vegetables during prolonged flooding at riparian wetlands. Research was aimed to identify the optimal depth of water-substrate interface (WSI) and optimal rate of NPK fertilizer application (RFA) in cultivating green apple eggplant using the FCS. Depths of WSI were adjusted to 0, 1, 3, and 6 cm and substrate was enriched with 8.4, 12.6, and 16.8 g NPK per pot. The enriched substrates were contained in pots and placed on floating rafts with variable WSI depths. Experiment was arranged in Split Plot Design. WSI was assigned as main plot and RFA was as subplot. The results exhibited that direct contact between water surface and substrate significantly increased water moisture content, enhanced shoot growth, and increased fruit yield, regardless the WSI depths. However, WSI treatments decreased SPAD value and restricted root elongation when WSI depth was more than 3 cm. The RFA treatments up to 16.8 g per pot could enhance shoot and root growth, and increased the fruit yield. This yield increase was associated with the increasing number of fruits, not the fruit size.

Seed Quality of Paddy Variety (Oryza sativa L.) Resistant to Vegetative Phase Drought Stress Winggi Anggun Jati; Zaidan Panji Negara; Firdaus Sulaiman
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 10 No. 1 (2021): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/JLSO.10.1.2021.538

Drought is an abiotic stress that can affect paddy yields by inhibiting growth, thereby reducing the quality of the seeds produced. This study aimed to find out the best seed quality of several paddy varieties produced from the plants experiencing drought stress in the vegetative phase. The varieties used in the study were Inpago 12, Unsoed 1, Inpago 4, Inpago 5, Inpago 9, Inpago 8, Inpago 10, Inpara 8, Inpara 9, Rindang 1, Rindang 2, Situ Patenggang, Towuti, and Batu Tegi. The drought stress was applied to the vegetative phase of the plant by reducing the intensity of water supply (63.5% moisture content), then the resulting seeds were tested in the laboratory. The results of the study showed that the highest seed quality value in the drought stress treatment of the vegetative phase were the Inpara 8 variety, followed by the Towuti variety with 93.33% and 88% germination values, 82.67% and 70% simultaneous growth, 12.11% and 8.44% germination rate, 64% and 64% germination strength, and 18.99 and 16.83 vigor indexes. Meanwhile, the lowest seed quality was the Inpago 8 variety with 26% germination value, 21.33% simultaneous growth, 1.33% germination speed, 3.33% germination strength, and 2.71 vigor index. Among all the varieties tested, the Inpara 8 and Towuti are those with the best seed quality values after experiencing drought stress during the vegetative phase.

Pemanfaatan Limbah Serai Wangi Sebagai Pakan Ternak dan Pupuk Organik di Desa Payakabung, Kabupaten Ogan Ilir, Sumatera Selatan Fitra Gustiar; Munandar Munandar; Zaidan P. Negara; Efriandi Efriandi
Abdihaz: Jurnal Ilmiah Pengabdian pada Masyarakat Vol 2 No 1 (2020): June
Publisher : Universitas Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/abdihaz.v2i1.1114

Utilization of Citronella Waste as Animal Feed and Organic Fertilizer in Payakabung Village, Ogan Ilir Regency, South Sumatra Lemongrass is an essential plant that is easy to cultivate. Many farmers in Payakabung village cultivate it. There are 3 units of lemongrass essential refineries with a capacity of 2 tons per day, which produce 6 tons of citronella fragrant waste every day or 180 tons every month. The production of Citronella Waste is a problem in the area around the distillation plant, so a solution to this problem is needed. Utilization as animal feed and organic fertilizer is a solution that can be done, but the knowledge of farmers about the technology of utilizing citronella waste is still low, so it is necessary to carry out farmer assistance activities regarding the use of citronella waste as feed and organic fertilizer. activities carried out include coordination with the village government, training, discussion and evaluation. The results of this activity show the lack of knowledge of farmers about the use of citronella waste, the use of which is only done as mulch in rubber gardens. this activity increases the knowledge of farmers to use other citronella waste. This activity is expected to have an impact on reducing the citronella waste that has accumulated in Payakabung village.

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