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Articles by Reni Mayerni
Total Records ( 2 ) for Reni Mayerni
  Arman Effendi AR , Aswaldi Anwar and Reni Mayerni
  Background and Objective: The System of Rice Intensification (SRI) is one of the techniques of planting rice that can increase rice productivity. However, in field application, there is still some questions as to which technique is the best for soil water conditions. By providing precise soil water conditions in ditch distances, it is expected that rice productivity could be increased and the use of water could be decreased. The aim of this study was to determine the effects of ditch distance on the growth and productivity of rice using SRI. Materials and Methdos: The rice variety used was Batang Piaman. This study was conducted using a Randomized Block Design (RBD) with five treatments of ditch distance, i.e., 1, 2, 3, 4 and 5 m and each treatment was given three replications. Data were analysed with the F-test (p<0.05). Results: Ditch distance significantly affected the maximum number of tillers, plant growth rate, net assimilation rate, number of productive tillers and seed weight per clump, but the number of seeds per panicle and the weight of 1000 seeds were not significantly affected. The best ditch distance for optimum growth and production of rice was 2 m. Using a planting range of 25×25 cm, there were 160,000 rice clumps that produced 8.288 t of dried seeds per hectare. This yield was higher than the described yield of the same variety of 6 t ha–1. Conclusion: The optimal ditch distance in planting rice using the SRI method was 2 m, resulting in an increase in rice yield of 38.13%.
  Wingki Ari Angga , Yose Rizal , Maria Endo Mahata , Ahadiya Yuniza and Reni Mayerni
  Background and Objective: West Sumatra is the third largest tea-producing area in Indonesia. Tea plantations in this area produce top quality leaves that can be marketed both domestically and internationally. To maintain a high level of tea leaf productivity, plants should be pruned every 3 years using a rotation system that involves monthly prunings. These prunings produce waste tea leaves that can serve as alternative feed resource for poultry as they have good nutritional value. Tea leaves contain high concentrations of antioxidants, such as polyphenols and policosanol as well as minerals and vitamins, which are known to improve poultry health. Unfortunately, tea leaves also contain high levels of tannins and crude fiber-components known to be detrimental to poultry. This study was designed to evaluate the potential of waste tea leaves (Camellia sinensis) as poultry feed in West Sumatra by reducing their tannin content through immersion in fresh and hot water. Materials and Methods: This research consisted of two phases. The first phase was a survey of the potential of waste tea leaves as poultry feed through interviews and measurement of waste tea leaf production. The second phase was to experimentally process waste tea leaves through immersion in fresh and hot water. Variables measured during phase 1 included the size of tea plantations, ownerships, tea varieties produced, waste tea leaf production and estimated potential for poultry feed. The experiment conducted in phase 2 was performed using a completely randomized design involving 2×4 factorial arrangement of treatments with 4 replicates. The first experimental variable was water temperature (room temperature or 80°C). The second experimental variable was based on immersion at 6, 12, 18 or 24 h. Response variables measured included change in tannin content, dry matter (DM), organic matter (OM), crude protein (CP) and crude fiber (CF). Results: The results of the first phase indicated that the area of tea plantations in West Sumatra was 4,246.6 ha, ownership consisted of small holders (2,172 ha), the government (604.58 ha) and a private company (1,470 ha), total waste tea leaf production was 25,208.28 t/year, tea varieties or clones were Camellia sinensis assamica TRI 2024 and assamica TRI 2025 and waste tea leaves had the potential to feed 4,201,380,000 laying hens. The results of the second phase indicated that there was an interaction between water temperature and immersion duration on tannin reduction (p<0.05). Water temperature significantly influenced (p<0.01) reductions in OM and CP content and significantly affected (p<0.05) CF augmentation. Immersion duration significantly affected (p<0.05) DM reductions and highly significantly influenced (p<0.01) reductions in OM and CP. Conclusion: Waste tea leaves can be immersed in hot water (80°C) for 12 h to reduce their tannin content without affecting their protein content.
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