High-quality marine ecosystems are free from global trending pollutants’ (GTP) contaminants. Accuracy and caution are needed during the exploitation of marine resources during marine tourism to prevent future ecological hazards that cause chain effects on aquatic ecosystems and humans. This article identifies exposure to GTP: microplastic (MP); polycyclic aromatic hydrocarbons (PAH); pesticide residue (PR); heavy metal (HM); and medical waste (MW), in marine ecosystems in the marine tourism area (MTA) area and Barrang Caddi Island (BCI) waters. A combination of qualitative and quantitative analysis methods were used with analytical instruments and mathematical formulas. The search results show the average total abundance of MPs in seawater (5.47 units/m3) and fish samples (7.03 units/m3), as well as in the sediment and sponge samples (8.18 units/m3) and (8.32 units/m3). Based on an analysis of the polymer structure, it was identified that the dominant light group was MPs: polyethylene (PE); polypropylene (PP); polystyrene (PS); followed by polyamide-nylon (PA); and polycarbonate (PC). Several PAH pollutants were identified in the samples. In particular, naphthalene (NL) types were the most common pollutants in all of the samples, followed by pyrene (PN), and azulene (AZ). Pb+2 and Cu+2 pollutants around BCI were successfully calculated, showing average concentrations in seawater of 0.164 ± 0.0002 mg/L and 0.293 ± 0.0007 mg/L, respectively, while in fish, the concentrations were 1.811 ± 0.0002 µg/g and 4.372 ± 0.0003 µg/g, respectively. Based on these findings, the BCI area is not recommended as a marine tourism destination.
A quality marine ecosystem if it is free from GTP contaminants. Accuracy and caution are needed in the exploitation of marine resources as marine tourism destinations so that in the future, there will be no ecological hazards that cause chain effects, not only on aquatic ecosystems but also on humans. This article identifies exposure to GTP (MP, PAH, PR, HM, MW) in marine ecosystems in the MTA area and BCI waters. The combination of qualitative and quantitative analysis methods uses a combination of analytical instruments and mathematical formulas. The search results show the average total abundance of MP in seawater and fish samples (5.47 units/m3) and (7.03 units/m3), respectively, while in sediment and sponge samples (8.18 units/m3) and (8.32 units/m3). Based on the analysis of the polymer structure, it was identified that the dominant light group MP (PE, PP and PS), followed by PA and PC. Several PAH pollutants were identified in the samples, especially NL types found in all samples, followed by PN and AZ. BCI sea waters are suspected to be exposed to MW and PR. Pollutants of Pb+2 and Cu+2 around BCI were successfully calculated with average concentrations in seawater 0.164 mg/L and 0.294 mg/L, respectively, while in fish, 1.8110 µg/g and 2,452 µg/g, respectively. Based on these findings, the BCI area is not recommended as a marine tourism destination.
Intermittent irrigation can save water use in rice cultivation, which is essential, especially during the dry season. This study aims to improve the physiology of the growth and yield of rice in various varieties by applying intermittent irrigation. The research was conducted from February to June 2019 in the experimental field of the Faculty of Agriculture, Universitas Muhammadiyah Yogyakarta. The research used a factorial experimental method 3 x 4 strip plots arranged in a Completely Randomized Block Design with three replications. The factor I rice varieties consist of Cempo Merah, Inpari 23, Sintanur, and Inpari 42. Factor II is the irrigation system consisting of continuous flooding, ten days of inundation, five days of drying, seven days of inundation, and three days of drying. There is an interaction between types of irrigation and rice varieties on the number of tillers. In Ten-day watering five-day drying, Sintanur and Inpari 42 variety produce more tillers than Inpari 23. On Seven days watering five-day drying, the Inpari 42 variety produces more tillers than Inpari 23. There are the differences in the responses of various rice varieties to the Specific Leaf Weight and yield. Specific Leaf Weight rice Cempo Merah varieties are higher than, Inpari 23, Sintanur and Inpari 42. Rice yield of Inpari 42 variety is higher than Cempo Merah, Inpari 23, and Sintanur varieties. Roots with watering seven days watering, three days of drying is longer than Ten-day watering five-day drying. Roots with watering Ten-day watering five-day drying is longer than conventional.
A System of Rice Intensification (SRI) create optimal conditions with transplanting widely spaced young single seedlings, organic fertilizer amendment, and water management. In Indonesia the water for irrigating rice is limited, especially in the dry season. An Intermittent irrigation method of rice cultivation aims to reduce water requirements. In Indonesia local rice varieties have the potential to produce high-yielding rice with the intermittent irrigation method to meet food needs. The study aims to determine the suitability of SRI and conventional irrigation techniques on local rice varieties. The research conducted the field experimental with 4 x 2 factorial design, arranged in a Randomized Completely Block Design with three replications. The first factor was rice varieties, which consisted of 4 varieties, i.e., Rojolele, Cianjur, Mentikwangi and Ciherang. The second factor was the method of irrigation consisting of two kinds, i.e., intermittent irrigation and continuous flooding. Analysis of variance and Duncan's Multiple Range Test at α=5% was used. The results showed that rice variety and irrigation were significantly interacts to the secondary macronutrient absorption and root development. Rojolele with SRI irrigation has higher secondary macronutrient absorption than the Cianjur and Mentikwangi. Calcium nutrient absorption of Rojolele and Ciherang with SRI irrigation was higher than other varieties, whereas Magnesium nutrient absorption of Rojolele with SRI irrigation was higher than Ciherang, Cianjur, and Mentikwangi. Rojolele with SRI irrigation had higher Sulfur nutrient absorption than Cianjur and Mentikwangi. In Rojolele and Ciherang, intermittent irrigation SRI produced longer roots at harvest and more wide root surface area than conventional irrigation, but on Mentikwangi, conventional irrigation produced longer roots and more wide root surface area than intermittent SRI irrigation. The chlorophyll b content of the Cianjur and Mentikwangi were greater than Rojolele. The yield of Cianjur was higher than Ciherang's variety.
One of the climate change phenomenon is uncertainty weather condition. This study aims to understand the technical efficiency of rice farm in Yogyakarta included the factors that influence them in uncertainty weather condition. We survey for sampling has been done in Sleman and Bantul Regency based on about 8 of water irrigation resources and about 25 locations of water irrigation area. The sampling method is simple random sampling to take 125 samples. Cobb Douglas translog frontier production function model has been used to analyze the factors that influence rice production and technical efficiency. The result of the production function shows that the factors that influence the rice production are land, labour, organic fertilizer, N fertilizer, irrigation pollution, irrigation type, season and location. The rice farm has not efficient. The study result gives the implication that the rice farm efficiency for sustainable agriculture, it needs using optimal input, peasant skill encouragement, and infrastructure development of irrigation.
Perkembangan kota sering menggeser keberadaan ruang publik, sehingga kuantitas dan kualitas ruang terbuka khususnya Ruang Terbuka Hijau (RTH) saat ini mengalami penurunan yang sangat signifikan dan mengakibatkan penurunan kualitas lingkungan hidup perkotaan yang berdampak ke berbagai sendi kehidupan perkotaan antara lain sering terjadinya banjir, peningkatan pencemaran udara, dan menurunnya produktivitas masyarakat akibat terbatasnya ruang yang tersedia untuk interaksi sosial (Peraturan Menteri Pekerjaan Umum, 2010).Secara sistem, RTH kota berfungsi menunjang keamanan, kesejahteraan, peningkatan kualitas lingkungan dan pelestarian alam. RTH kota pada umumnya terdiri dari ruang pergerakan linear atau koridor dan ruang pulau atau oasis (
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