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Abstract. Yusuf R, Tang UM, Karnila R, Fuadi I, Pato U. 2020. Ecological sustainability of rice farms in Siak District, Riau, Indonesia. Biodiversitas 21: 3797-3804. The research was conducted in Siak District, Riau Province, Indonesia from January to July 2018 in the four subdistricts of rice production centers. The purpose of this study was to identify the ecological conditions of rice farming, analyze the index and ecological sustainability status of lowland rice farming, and analyze the role of each ecological attribute that will have sensitivity to the management of wetland rice in the development of rice farming in the Siak District in the near future. There were 203 sample farmers selected by purposive sampling. Data collection was done by interview and field observation. The sustainability was analyzed using the Rap-Rice method with Multidimensional Scaling (MDS). The results of the Rap-Rice analysis of eight ecological attributes were analyzed; five attributes provided high sensitivity for Sungai Mandau, and three attributes provided high sensitivity for the subdistricts of Bunga Raya, Sabak Auh, and Sungai Apit. Attributes that provided high sensitivity for all subdistricts were attributes of land suitability with land use plans and land conversion rates. The average attributes of ownership of the farm area provided high sensitivity for only three subdistricts (Sabak Auh, Sungai Apit, Sungai Mandau). Based on ecological conditions, analysis of wetland rice farming in Siak District showed a sustainable category for Bunga Raya (56.10%), Sabak Auh (52.80%), and Sungai Mandau (54.90%) and less sustainability for Sungai Apit (48.80%).

The study was conducted from January to July 2018 in four sub-districts (Bunga Raya, Sabak Auh, Sungai Apit and Sungai Mandau) in Siak Regency. The sample of farmers in this study were 203 people who were selected by purposive sampling. Data collection was done by interviewing techniques using questionnaires and field observations. The analysis of the sustainability of lowland rice farming was carried out based on the assessment of index and sustainability status using the Rap-Rice method in Multi-Dimensional Scaling (MDS). The purpose of this study was to analyze the index and the status of sustainability of the socio-cultural dimensions of wetland farming and analyze the role of each of the socio-cultural attributes that have sensitivity to the management of rice farming in the future. The results of Rap-Rice analysis of the seven socio-cultural attributes analyzed, two attributes provide sensitivity to the District (Bunga Raya, Sabak Auh and Sungai Mandau). Four attributes give sensitivity to Sungai Apit District. The attribute that gives sensitivity to all sub-districts is the attribute of attending training / counseling. Based on socio-cultural conditions, the analysis of wetland rice farming in Siak District showed a fairly sustainable category for Bunga Raya District (56.7%), Sabak Auh (50.80%) and Sungai Mandau (51.10%) while for Sungai Apit Subdistrict the value was obtained (47.70%) or less sustainable .

ABSTRACT   Integrated Planting Calendar Information System becomes a necessity, which is expected to increase agricultural yields and can reduce crop losses due to drought and floods. Besides that an information that is summarized in one data-base becomes a need to get various information in a quick time. This planting calendar provides complete information for farmers. These operational guidelines are established at the community and sub-district levels. Planting Calendar Information System as an important tool in adjusting cropping patterns with climate change. Deliver information about the direction, strategies, and policies of the agricultural sector on climate change in the form of a road map to stakeholders and related parties. This paper aims to find out the application of water resources and climate in supporting the improvement of Indragiri Hulu Regency's rice crop index. The methodology used is through field observations and secondary data collection. The Research and Development Agency has developed adaptive technology with climate change, namely the Integrated Planting Calendar Information System (KATAM). The results showed that referring to the Recapitulation of Rice Potential Calendar for Indragiri Hulu Regency in the planting season MH 2017/2018 and MK April - September 2018 it was known that the area of ​​rice planting was 5.029 ha with a Planting Index of 269%. The recommended potential for SI Katam Integrated rice was 862 ha wider than the existing planting area of ​​4.167 ha with an IP value of 118%.

Research on the application of fermented plant extracts to increase the antioxidants of mustard greens has taken in the experimental garden of Horticulture Seed Center in Riau Province, from June to October 2018. This study used a completely randomized design with six treatments and three replications. (A) = neem leaves; (B) = sour-sop leaves; (C) = the crown of the god; (D) = lemongrass; (E) = mixture of plant extracts (neem leaves, sour-sop leaves, god’s crown fruit and lemongrass); and (F) = control. The parameters observed in this study were vitamin C content (mg/100 g), total phenol content (mg/100 g) and total antioxidant activity (% inhibition). The purpose of this study was to determine the effectiveness of several kinds of plant extracts (neem leaves, soursop leaves, god’s crown fruit and lemongrass and a mixture of several plant extracts) fermented with EM4 on levels of vitamin C, total phenol content and antioxidants of mustard greens. The results showed that in general, the fermented neem leaf treatment provided the highest effectiveness for all parameters compared to other plant extracts, namely vitamin C levels (72,846 mg/100 g), total phenol content (0.074 mg/100 g) and antioxidant (75.230%).