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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vegetalika Jurnal Ilmu Pertanian Indonesian Journal of Biotechnology jurnal Ilmu Pertanian (Agricultural Science)
Dyah Weny Respatie
Departemen Budidaya Pertanian, Fakultas Pertanian, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Immunology & microbiology Materials Science & Nanotechnology

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Journal : Jurnal Ilmu Pertanian

 1 
Side Grafting of Unproductive Cocoa : Socio-Economic and Ecological Impact Taryono and Dyah Weny Respatie
Jurnal Ilmu Pertanian Vol 16, No 2 (2013): Desember
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.082 KB) | DOI: 10.22146/ipas.2535

Abstract

ABSTRACTCocoa is a tree of the humid lowland tropics produced largely by small farmers, therefore in developing countries it can be used to generate farmer’s income, provide labor employment and conserve environment. At the last decade, the cocoa productivity, the size and quality of beans in Indonesia significantly tend to decline due to the ageing of the tree, poor farming maintenance practice, planting of low yielding variety and ravages caused by pest and diseases. Such declining affects the price and the farmer’s income, and farmers respond by leaving the plantation, replacing with food crops or oil palm, and increasing forest clearing which will threaten the environment. Such problem can be addressed by increasing the long term cocoa productivity of existing farms through side grafting of unproductive cocoa trees with genetically improved varieties. In 2008, it was reported that there are around 235.000 ha of unproductive cocoa that can be improved though side grafting. There was almost 90.000 ha that has been side grafted in 2009 and 2010 by the government support, and in 2011 evaluation through focus group discussion has been carried out. Side grafting with recommended varieties normalizes the cocoa growth, and cures the diseases. With a recommended cultivation technique, the productivity increases twice which followed by improve seed size. These result probably will gives an impact not only on the income but also farmer’s future. Several farmers informed that they will not demolish their cocoa farm or even clear new land for crop food. Normal growth of cocoa and stopping opening new land will have a positive effect to the environment especially in mitigating climate change. Keywords: side grafting, cocoa
Transformation of Zinnia elegans Jacq. as an ornamental potted plant by daminozide application Nurul Annisa; Aziz Purwantoro; Dyah Weny Respatie
Jurnal Ilmu Pertanian Vol 6, No 3 (2021): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.62668

Abstract

Zinnia elegans Jacq. is one of the ornamental plants potential to be used as a potted ornamental plants. The problem to be resolved is the size of the plant can reach 1 m, so it is necessary to modify the plant height into 20 cm to 25 cm using retardant (plant growth regulator), called daminozide. The purpose of this study was to determine the best concentration and soaking time using daminozide to inhibit the growth of zinnia. The research was conducted at Mangkuyudan 57, Yogyakarta. This research was arranged in a factorial design with 3 blocks as replication. Different concentrations of daminozide were used as first factor with three levels (1 g.L-1, 2 g.L-1, and 3 g.L-1) and soaking times were used as the second factor (12 h, 24 h, and 36 h). The data were analyzed using analysis of variance and continued with HSD-Tukey at the α = 5 %. The results showed that there were an interaction between daminozide concentration and soaking time in the height of Z. elegans. There were also positive correlation between plant height, number of flower, and flowering period. The best combination of daminozide concentration and soaking times were 2 g.L-1 and 12 h. This treatment gave the best height that fit to the criteria of a potted plant which was 20.08 cm. However, it reduced flower’s diameter, number of flowers, and canopy’s size.
Effects of paclobutrazol concentrations and watering frequencies on the flowering ratio of cucumber plants (Cucumis sativus L.) Ratih Hartono Putri; Aziz Purwantoro; Valentina Dwi Suci Handayani; Dyah Weny Respatie
Jurnal Ilmu Pertanian Vol 7, No 1 (2022): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.66002

Abstract

Generally, cucumber plants have more male flowers than female flowers. The fewer number of female flowers is one of the problems of cucumber production. Flowering regulation can be performed by applying growth regulators and water management. The study aims to determine the effects of paclobutrazol concentrations and watering frequencies on the flowering ratio of cucumber plants. The experiment was arranged in a factorial Randomized Completely Block Design at the Agricultural, Food, and Fishery Extension Center, Seyegan, Yogyakarta. The first factor was the paclobutrazol concentrations consisting of four levels (a control, 0.187 mL.L-1, 0.375 mL.L-1, and 0.562 mL.L-1). Meanwhile, the second factor was the watering frequency consisting of three levels (once a day, once every two days, and once every three days). The observed data were performed using the analysis of variance (ANOVA) and followed with Duncan’s Multiple Range Test at α= 5 %. The paclobutrazol concentrations resulted in a significant effect on all of the observed variables. Meanwhile, watering frequencies showed no significant effect on the male flowers, female flowers and ratio of male to female flowers in cucumber. There was an interaction effect of paclobutrazol concentration and watering frequency on the plant height and flowering age of cucumber plants. The treatment of paclobutrazol at a concentration of 0.375 mL.L-1, decreased of male flowers and increased of female flowers, reducing the ratio of male and female flowers of cucumber plants at various watering frequencies.-1
Sweet corn windbreaker’s effect on microweather changes and increases growth and yield of water spinach (Ipomoea reptans Poir.) on the Samas coastal sandy land Ulfah, Fajarani; Indradewa, Didik; Respatie, Dyah Weny
Jurnal Ilmu Pertanian Vol 9, No 3 (2024): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.85810

Abstract

High wind speed is one of the limiting factors for plant cultivation in coastal sandy land. To mitigate this, sweet corn, an annual plant, can be cultivated as a windbreaker. Water spinach is one of the short-lived plants cultivated by farmers in coastal sandy land. The study aimed to figure out the microweather change, growth, and yield of water spinach protected by sweet corn as windbreaker in various planting locations in Samas coastal sandy land. The research had been conducted in Samas coastal sandy land, Bantul Regency, Yogyakarta Special Region, from October to November 2022. The experiment was arranged in Randomized Complete Block Design non-factorial, containing five treatment levels and four repetitions. The treatment of the planting location of sweet corn as a windbreaker is without sweet corn, sweet corn positioned on the “east”, sweet corn on the “east and west”, sweet corn on the “south”, and sweet corn on the “south and north”. The data were analyzed using analysis of variance (ANOVA), and if the difference was marked, the data analysis was proceeded to Tukey HSD with α = 5%. The results showed that sweet corn windbreaker placed on the “east” was the most effective in decreasing wind speed, thereby modifying the microweather of water spinach plot by lowering air temperature and increasing air humidity and soil moisture content during November on the Samas coastal sandy land. Growth, dry matter accumulation, and water spinach yield increased, although the dry harvest index and fresh harvest index did not show any improvement.
Co-Authors Adwitya Handriawan Agus Budi Setiawan Aidha Rusita Putri Ayuningtyas, Sekar Aziz Purwantoro Aziz Purwantoro Chee How Teo Dela Yusuf Efendy Didik Indradewa Dody Kastono Donny Widianto Eka Tarwaca Susila Putra Fandi Setiawan Hanifa, Yumna Ilmiah, Haviah Hafidhotul Ilyas Ilyas Irma Erselia JAKA WIDADA Kurnia Dyah Puspita Muhammad Saifur Rohman Nurul Annisa Prapto Yudono Qurrotul Uyun, Qurrotul Ratih Hartono Putri Ratnasani Ambarwati Siniwi Rima Pratiwi Rohlan Rogomulyo Sri Trisnowati Suhesti Mustika Ningrum Tahtihal Anhar Taufan Alam Tio Eka Sinurat Tohari Tohari Tohari Tohari Ulfah, Fajarani Valentina Dwi Suci Handayani Wiwit Yuni Astuti Yeni Fatmawati Yuliani Wulandari Yundari, Yundari