Papers by Rofiqoh Purnama Ria
BIOVALENTIA: Biological Research Journal
Swiss chard is a leafy vegetable that is high in nutrients, vitamins, minerals, protein, and anti... more Swiss chard is a leafy vegetable that is high in nutrients, vitamins, minerals, protein, and antioxidants that are beneficial to human health. Swiss chard. Swiss chard is generally cultivated in the Mediterranean climate, grows well in full sunlight, air temperatures 14-21oC, and can still survive at temperatures close to light frost. The aim of this study to evaluate efficient plant densi-ties in urban limited land area and looking at the response of Swiss chard plant to reduc-ing the intensity of sunligt of 45%, 55% and 80%.in urban tropic area. This research was used 4 different artificial shading i.e 0% (control, shade 45%, shade 55% and shade 80%. Microclimate was measured per each shade for 14 days i.e., air temperatur, soil temperature, air humidity, and soil moisture using a data logger meter. Shade with intensity 80% is proven to reduce air temperate and soil temperature, but also inhibits the growth and development of Swiss chard plants. Population 1plant/pot gives the bes...
Journal of Horticultural Research
Swiss chard as a leafy vegetable (Beta vulgaris subsp. cicla (L.) W.D.J.Koch) is rarely cultivate... more Swiss chard as a leafy vegetable (Beta vulgaris subsp. cicla (L.) W.D.J.Koch) is rarely cultivated in the tropical climate zone because this plant has not been recognized by local farmers. The purpose of this study was to compare the performance of three cultivation systems, i.e., conventional, floating, and bottom-wet culture systems on three Swiss chard cultivars with different petiole colors, i.e., ‘Red Ruby’, ‘Yellow Canary’, and ‘Pink Passion’. The best result was obtained if the Swiss chard was cultivated using the floating system since the water was continuously available by the capillarity force through the bottom hole of the pots, as indicated by the highest number of leaves, total fresh weight, leaf blade dry weight, and petiole dry weight. Fresh weight amongst the three cultivars cultivated in each system did not show a significant difference. ‘Yellow Canary’ produced a larger petiole and heavier fresh weight of individual leaves, but a lesser number of leaves per plant. ...
Chiang Mai University Journal of Natural Sciences, 2021
Drought stress during vegetative and/or generative stages could cause massive reduction in rice y... more Drought stress during vegetative and/or generative stages could cause massive reduction in rice yield. This study evaluated effectiveness of hydro- and osmo-priming on improving seed germination, growth and development of upland rice under drought stress during late vegetative, booting, or heading stage. Treatments consisted of hydro-priming and osmo-priming consisted of three polyethylene glycol (PEG) concentrations i.e. 10%, 15%, and 20%. Results showed that application of osmo-priming at 10% PEG required longer time (21.93 hours) to reach 50% germination, lower germination and lower vigor index. However, after germination, seeds primed with 10% PEG exhibited better seedling growth than other seed priming treatments. Effects of seed priming on yield components were overshadowed by drought exposures. Drought imposed during vegetative stage did not significantly affect yield; however, regardless of seed priming treatments, yield reduction was inevitable in rice plants exposed to dro...
Trends in Sciences, 2021
Tatsoi [Brassica rapa subsp. narinosa (L.H.Bailey) Hanelt] is a leafy vegetable with potential fo... more Tatsoi [Brassica rapa subsp. narinosa (L.H.Bailey) Hanelt] is a leafy vegetable with potential for cultivation in a riparian wetland ecosystem. The floating culture system has the advantage of ensuring a sufficient water supply in the growing substrate due to the continuous upward water movement caused by capillarity force. This study evaluated the responses of the tatsoi plant to split fertilizer applications under conventional cultivation and floating culture systems. The fertilizer treatments consisted of control (F0), single (F1), split into 2 (F2), split into 3 (F3) or split into 4 applications (F4). The results showed that early growth of tatsoi was better using floating culture than the conventional system. However, tatsoi adapted well to conventional and floating culture systems as long as sufficient nutrients were available. A single application of 6 g NPK fertilizer (16:16:16 v/v/v) at transplanting provided sufficient nutrients, as indicated by the number of leaves, total...
Biodiversitas Journal of Biological Diversity, 2020
Cross-ecosystem utilizing primed seeds of upland rice varieties for enriching crop diversity at r... more Cross-ecosystem utilizing primed seeds of upland rice varieties for enriching crop diversity at riparian wetland during dry season. Biodiversitas 21: 3008-3017. Cultivation of rice during second growing season at riparian wetlands in Indonesia must deal with drought conditions at reproductive stage. Seed priming can speed up seed emergence and produces vigorous seedlings. Objective of this study was to screen upland rice varieties which were positively responded to seed priming and tolerant to drought during late vegetative and/or reproductive stage. Results of this study indicated that osmo-priming showed positive effects on seed emergence, percentage of germinated seed, and time to reach 50% germination. Effects of osmo-priming on seedling growth did not go beyond four weeks after seedlings had been transplanted. Among nine varieties screened, Inpago 10 exhibited better response to seed priming during late vegetative stage as it produced the highest number of tillers and total leaf area. However, at harvest, osmo-priming with 20% PEG lowered filled spikelet and weight of 100 grains but did not affect yield. Drought during late vegetative stage lessened number of tillers but after drought-treated plants recovered during reproductive stage, percentage of filled spikelet and grain size were comparable to those of control plants. Meanwhile, drought imposed during reproductive stage decreased percentage of filled spikelet and grain yield. Despite its better performance under drought conditions, leaf rolling score was higher during heading stage in Inpago 10. This phenomenon indicated that leaf rolling was not forced by drought, rather it was a quick response of Inpago 10 variety to limit water loss due to transpiration.
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands, 2020
Ria RP, Lakitan B, Negara ZP. 2020. Effects of water table, seedling density and transplanting ti... more Ria RP, Lakitan B, Negara ZP. 2020. Effects of water table, seedling density and transplanting time on vegetative growth of black sticky rice at floating seedbed. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 9(2): 167-174.Study on black sticky rice cultivation in South Sumatera is seldom carry out. The objective of this study was to evaluate the effect of water table and population density on the growth of rice during seedling preparation at floating seedbed; furthermore, this study aimed to evaluate the effect of transplanting time on vegetative growth of black sticky rice. The research was started in May 2018 in Palembang. Black sticky variety used in this research was Toraja variety. The raft used is made from 1,5 l plastic bottles which are arranged to reach 2x1 meters in size. This study was conducted by two stages. The first stage was for water table and population density treatments laid on split plot design. The second stage was for transplanting time utilizing ...
Chiang Mai University Journal of Natural Sciences, 2020
Ratooned rice crop is a strategy for increasing rice production at short second rice growing seas... more Ratooned rice crop is a strategy for increasing rice production at short second rice growing season at riparian wetland under unpredictable climatic condition. The objective of this research was to evaluate vegetative growth and potential grain yield in ratooned black glutinous rice exposed to continuous flooding at 3-cm depth, alternate wetting-drying condition, and shallow water table during second rice growing season at riparian wetland. These three water regimes simulate the possibilities of unfavorable conditions, i.e. prolonged rainy season, inconsistent rain distribution, and early transition of rainy-to-dry season. In addition to water regime treatments, the ratooned rice was enriched with three NPK (15-15-15) rates equivalent to 80, 160, 240, and 320 kg/ha. Results indicated that total and productive tillers, leaf and stem dry weight, number of leaves, percentage of filled grain, and grain yield were significantly affected by water regimes; while NPK application rates significantly affected total and productive tillers, number of leaves, and grain yield. Continuous flooding effectively controlled weed outburst during cultivation of ratooned rice. Therefore, it contributed to better rice vegetative growth and grain yield than those exposed to alternate wetting-drying or shallow water table condition. The highest grain yield was found at 320 kg/ha NPK application rate. Number of productive tillers was highly correlated with grain yield (r = 0.8499) while total number of tillers was moderately reliable (r = 0.6334) and can be used as an early predictor for grain yield in ratooned rice.
Folia Horticulturae
This study aimed to compare cormels and suckers to determine the better planting material (PM) an... more This study aimed to compare cormels and suckers to determine the better planting material (PM) and to evaluate the effects of morphology-altering treatments on both shoot growth and corm yield in taro plants. The PMs used included cormel (PMC), suckers with two leaves (PMS2) and suckers with four leaves (PMS4). Morphological alteration (MA) treatment included removal of all suckers (MAS), excising the mother plant (MAM), and non-treated control (NMA). Data were collected weekly for non-destructive and at 12, 20, and 28 weeks after planting (WAP) for destructive measurements. Results of this study indicated that the SPAD values were higher in taro plants grown using cormel and morphologically non-altered plants. Removal of all suckers caused the mother plant to increase the number of leaves. The dry weight of the leaf blades, petioles and fibrous roots of the mother plant and the number of suckers decreased after the corm enlargement process took place. Fresh and dry weights of the c...
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Papers by Rofiqoh Purnama Ria