Riau is one of the provinces in Indonesia that often experience forest and land fires. Forest and land fires cause enormous environmental, economic, and social losses and damages that even cause disruption of political relationship between countries. This study aims to determine the relationship between biophysical, socioeconomic, and policy factors in influencing the occurrence of forest and land fires in Riau Province Based on researh, it is known that there is a correlation between forest and land fires variables in Riau Province to distance from 15 variables, ie peatland, river, road, forest cover, plantation cover, plantation, settlement (built up area), dry land, Timber Forest Product Utilization License, plantation concession, other use areas, protected forest areas, production forests, conversion production forest and limited production forest.

One of the organisms that helps in decomposition of oil palm empty fruit bunches is Oryctes rhinoceros L. larvae. This is because of in the gut of the larvae there are many cellulolytic bacteria and lignoliytic. The process of accelerating the decomposition of oil palm empty fruit bunches into compost can be done by optimizing the work of the bacteria. The aim of this research is to obtain cellulolytic and lignolytic bacteria from larvae O. rhinoceros L.. The research succeeded to isolate 24 isolates of cellulolytic bacteria and lignolytic bacterial isolates from the gut of O. rhinoceros larvae. Based on qualitative test, 9 isolate bacteria produced cellulolytic index above 2. The highest cellulolytic index was generated by ORL19 isolate, while the lignolytic index obtained ORL6 isolate. Based on macroscopic and microscopic identification of bacteria, biochemical and physiological tests,  it was found ORL 6 belongs to the genus Bacillus sp. while the ORL 19 belongs to the genus Citrobacter sp..

Limitations of productive land causing agricultural extension leads on marginal land. Peatlands are one type of land including the criteria for marginal land. Destruction of peatland ecosystems arising from land management and the selection of one commodity which is not in accordance with the characteristics of peatland. Damage criteria peat in government regulations to function cultivation is more than 0,4 m below the peat surface. One alternative for the agricultural development of peatlands associated with groundwater levels ≤0,4 m to do with the development of food crops, especially rice crops. This is because the root system of the rice crop is only about 40-50 cm categorized shallow roots, thus suitable for development on peatland shallow. This study aims to determine the response growth and yield of rice plants with organic and inorganic fertilizer application by microbial cellulolytic on peat soil. The experimental was conducted from November 2017 to January 2018 in Laboratory of Soil Science and Plant Laboratory, Faculty of Agriculture at Universitas of Riau. The research was conducted using a completely randomized design (CRD), which consists of 7 treatments and 4 replicates so on May 28 experimental units. As for the treatment Control, 50% inorganic fertilizer, 100% inorganic fertilizer, 80 grams of composted rice straw, 160 grams of litter rice straw + 160 ml consortium of microbes, 80 grams of composted rice straw + 50% inorganic fertilizer, 160 grams of rice straw litter + 160 ml of microbial consortium selulitik + 50% inorganic fertilizer. The results showed that addition of 160 g of rice straw litter + 160 ml of microbial + 50% inorganic fertilizer consortium was the best treatment by producing tillers reaching 54,87 tillers, the number of grain per panicle reached 130.57 grains with crop grain weight reaching 57.27 grams, with a percentage of empty the lowest is 3.62%.

AbstrakRendahnya produktivitas tanaman padi maupun hortikultura di desa Langsat Permai Kecamatan Bunga Raya Kabupaten Siak salah satunya disebabkan karena belum tersedianya air yang cukup untuk budidaya tanaman sehingga perlu dilakukan pengelolaan tata air dengan pembuatan canal blocking untuk dapat dimanfaatkan pada tanaman padi maupun tanaman hortikultura di daerah tersebut. Hal ini dilakukan untuk memenuhi kebutuhan air pada tanaman padi maupun hortikultura apalagi pada saat musim kemarau. Oleh karena itu, dilakukan pendampingan melalui kegiatan IbDM pengelolaan tata air di Desa Langsat Permai Kecamatan Bunga Raya Kabupaten Siak. Selain pengadaan air, peningkatan budidaya pertanian dapat dilakukan dengan memanfaatkan limbah jerami untuk dijadikan kompos dan pakan ternak sehingga dapat membentuk pertanian terpadu antara aspek pertanian dan peternakan. Strategi pendampingan dilakukan dengan berdiskusi secara langsung dengan kelompok tani mengenai dampak pembuatan canal blockingdan praktek langsung dalam pembuatan kompos dan pakan ternak. Melalui kegiatan ini sangat terlihat antusias masyarakat dalam pelaksanaan kegiatan IbDM yang dilakukan melalui peningkatan motivasi masyarakat untuk pengembangan tanaman pangan dan hortikultura serta lebih memanfaatkan jerami padi untuk kompos dan pakan ternak.Kata Kunci : canal blocking, jerami padi, kompos, pakan ternak AbstractThe low productivity of rice crops and horticulture in Langsat Permai village, Bunga Raya subdistrict, Siak regency is caused by the lack of sufficient water for the cultivation of plants, so it is necessary to manage the water system by making canal blocking to be used in rice crops and horticultural crops in the area. This is done to meet the water needs in rice crops and horticulture especially during the dry season. Therefore, assistance is done through the activities of IbDM water management in the Village Langsat Permai District Bunga Raya Siak District. In addition to water supply, improved agricultural cultivation can be done by utilizing the waste of straw to be used as compost and animal feed so as to form an integrated agriculture between aspects of agriculture and livestock. Advisory strategy is conducted by discussing directly with farmer groups about the impact of canal blocking and direct practice in composting and animal feed. Through this activity is very visible enthusiastic community in the implementation of IbDM activities conducted through increased community motivation for the development of food crops and horticulture and more use of rice straw for compost and animal feed. Keywords: Canal Blocking, Rice Straw, Compost, Animal Feed

Oil palm (Elaeis guineensis Jacq.) holds a very strategic role in the Indonesia economy. Plants that have reached the economical age of 25 years need to be replanted using qualified oil palm seedling. The qualified seedling is obtained through proper fertilization. The combination of NPK fertilizer and organic material of oil palm empty fruit bunches (OPEFB) which has been given a cellulolytic bacterial consortium can provide sufficient nutrients for the growth of oil palm seedlings. The study aimed to determine the effect of giving a combination of OPEFB organic material, cellulolytic bacterial consortium, and NPK fertilizer on the growth of oil palm seedling (Elaeis guineensis Jacq.) at main nursery. This experiment used a single factor experiment arranged in a Completely Randomized Design (CRD). The treatments were a 100% NPK, a OPEFB compost, a 50% NPK + OPEFB compost, a 50% NPK + OPEFB + Cellulolytic bacterial consortium, and a OPEFB + cellulolytic bacterial consortium. The results showed that the application of inorganic fertilizers combined with organic fertilizers (a OPEFB compost and a OPEFB + cellulolytic bacterial consortium) had a good effect on each parameter. Giving organic fertilizer without inorganic fertilizer had not affected plant growth on all parameters. Application of a OPEFB compost and a OPEFB + cellulolytic bacterial consortium can reduce the use of inorganic fertilizers by 50%.

Air merupakan unsur penting yang dibutuhkan dalam budidaya tanaman cabai di Desa Langsat Permai. Selama ini, petani Desa Langsat  Permai memanfaatkan air kanal yang berada di sekitar lahan untuk usaha budidaya cabai maupun tanaman lainnya. Akan tetapi, petani sulit mendapatkan air apabila terjadi musim kemarau sehingga menghambat usaha budidaya tanaman yang mereka lakukan. Berangkat dari permasalahan tersebut, kegiatan Iptek bagi Desa Mitra (IbDM) melakukan pembangunan canal blocking yang bertujuan untuk mengelola ketersediaan air khususnya pada musim kemarau. Pembangunan canal blocking tersebut sangat memberikan manfaat pada peningkatan hasil produksi cabai dimana tahun 2018 produksi cabai sebesar 14-15 ton/Ha dibandingkan pada tahun 2017 hanya berkisar 10-11 ton/Ha. Tidak hanya produksi cabai yang meningkat, pembangunan canal blocking ini juga memberikan dampak kepada meluasnya lahan sawit yang dikonversi menjadi lahan budidaya tanaman pangan maupun hortikultura. Terlihat dari jumlah lahan sawit yang dikonversi menjadi lahan pertanian tanaman pangan dan hortikultura sebesar 26 Ha pada tahun 2018. Hal ini sangat mendukung program Pemerintah Kabupaten Siak dimana pemerintah mendorong kegiatan pertanian baik pangan maupun hortikultura dibandingkan perkebunan sawit. Oleh karena itu, Pemerintah Kabupaten Siak dalam hal ini Bupati dan Kepala Dinas terkait melakukan kegiatan panen raya pada tahun 2018. Kegiatan ini sangat menguntungkan petani karena mereka dapat mengajukan beberapa sarana dan prasarana guna meningkatkan budidaya tanaman khususnya cabai. Pemerintah Kabupaten Siak juga mendorong Desa Langsat Permai menjadi salah satu daerah agrowisata berbasis tanaman cabai yang menampilkan budidaya cabai sampai penanganan pascapanen cabai.

Peningkatan produktivitas pertanian padi dan cabai di Desa Langsat Permai meningkat setelah permasalahan ketidaktersediaan air untuk menunjang kegiatan pertanian teratasi. Melalui kegiatan PPDM tahun 2017-2019 yaitu pembangunan canal blocking, terjadi peningkatan produktivitas pertanian terutama tanaman padi (pada tahun 2018 mencapai 7-8 ton/Ha) dan cabai (pada tahun 2018 mencapai 14-15 ton/Ha). Selain pembuatan canal blocking untuk tata air, kegiatan PPDM tersebut juga mengembangkan kegiatan peternakan melalui pembangunan rumah kompos dan pemberian sapi beserta kandangnya. Akan tetapi, pembangunan rumah kompos dan pengadaan sapi tersebut belum optimal dalam upaya mengurangi penggunaan pupuk anorganik. Selain itu, penggunaan pestisida kimia secara berlebihan menyebabkan tingginya biaya produksi yang harus dikeluarkan oleh petani setempat dan berbahaya bagi lingkungan. Berdasarkan permasalahan tersebut, tujuan kegiatan pengabdian ini adalah melakukan pendampingan petani dalam pengembangan sistem pertanian Low External Input Sustainable Agriculture (LEISA) dalam pengelolaan pupuk maupun pengendalian hama penyakit tanaman yang dibudidaya oleh petani setempat. Pendampingan petani dilakukan dengan pembuatan demonstrasi plot pada lahan pertanian desa setempat. Dari hasil demplot yang dilakukan pada tanaman padi, cabai, dan jagung terlihat bahwa penggunaan pupuk anorganik dapat dikurangi sebanyak 25% untuk mendapatkan pertumbuhan dan hasil lebih baik, sedangkan penggunaan agens hayati lebih disarankan dibandingkan pestisida nabati untuk mengendalikan serangan hama di lahan pertanian petani Desa Langsat Permai.

This study aims to determine the effect of giving several liquid biological fertilizer formulations with the addition of B. cereus and get the best formulation to increase the growth and yield of sweet corn. The field experiment was conducted in the Faculty of Agriculture experiment station, Riau University located in Pekanbaru from July 2018 to October 2018. The research was carried out experimentally using a completely randomized design consisting of five treatments with four replications. The treatments tested were P1: B. cereus without formulation, P2: 100 ml B. cereus + 1 l wastewater of rice + 1 g chitin + 100 ml molasses, P3: 100 ml B. cereus + 1 l wastewater coconut + 1 g chitin + 100 ml molasses, P4: 100 ml B. cereus + 1 l tofu liquid waste + 1 g chitin + 100 ml molases, P5: 100 ml B. cereus + 1 l palm oil mill effluent + 1 g Chitin + 100 ml molasses. The parameters observed were plant height, age of female flower emergence, harvest age, stem diameter, weight of cob with cornhusk, weight of cob without cornhusk, length of cob without cornhusk, diameter of cob without cornhusk, number of rows of corn kernels. The results showed that all treatments have not been able to improve the growth response and yield of corn plants and all formulations of B. cereus biological fertilizer tested have not found the best formulation.