The Lake Toba Catchment Area (LTCA) has degraded due to a lack of implementation of conservation principles. Agroforestry is one of the land-use techniques with a conservation approach. Agroforestry development in LTCA should be supported by stakeholders, especially farmers. Farmers’ support will be formed if they have a good perception and interest in developing the agroforestry systems. The study aims to determine farmers’ characteristics, perceptions, and interests in agroforestry development in LTCA. The study was conducted from July until August 2019 at Simalungun Regency, North Sumatra Province. Data were collected through semi-structured interviews using a questionnaire with 30 respondents. Measurement of farmers’ perception and interest use a Likert scale. The data were then analyzed descriptively. The results showed that the farmers’ age is dominated by the productive phase (30-50 years old); they are only completed elementary schools, with average landholding was <0.3 ha, and farming experience >10 years. Farmers’ perceptions and interests in agroforestry development in LTCA are in good categories, each with a score of 4.18. These perceptions and interests of farmers are supporting factors that would positively impact the development of sustainable agroforestry in LTCA.

Lahan gambut memiliki keterbatasan jenis untuk dikembangkan sebagai hutan tanaman industri. Bintangur (Callophyllum soulatri Burm. F.) merupakan salah satu jenis asli di hutan gambut. Saat ini bintangur belum dikembangkan secara luas sebagai hutan tanaman industri. Secara ekonomi, bintangur mempunyai nilai manfaat yang tinggi yaitu kayunya dapat digunakan sebagai bahan baku pulp dan buahnya dapat digunakan sebagai bahan biofuel. Penelitian bertujuan untuk mengevaluasi sejauhmana kemampuan tumbuh bintangur dan karateristiknya di lahan gambut. Uji coba penanaman dilakukan dengan jarak tanam 3 x 3 m 2 di Kabupaten Siak, Propinsi Riau. Pengamatan dilakukan pada umur 4 tahun setelah tanam dengan parameter yang diukur adalah diameter setinggi dada, tinggi total dan daya hidup tanaman. Analisis data dilakukan untuk mengatahui rata-rata dan standar deviasi. Hasilnya menunjukkan bahwa bintangur mudah diperbanyak secara generatif yaitu cabutan alam dan biji. Pada umur 4 tahun diperoleh rata-rata diameter setinggi dada 3,82 ± 0,90 cm dan tinggi total 3,39 ± 0,72 m dengan riap diameter 0,95 cm/tahun dan riap tinggi 0,85 m/tahun. Bintangur mampu tumbuh baik di lahan gambut terbuka dengan persen hidup 75 ± 15,2% dan umur 3 tahun sudah berbuah. Dengan demikian, tanaman bintangur potensial dikembangkan sebagai hutan tanaman penghasil kayu pulp dan energi. Kata kunci: Callophyllum soulatri, lahan gambut, riap, kayu pulp dan energi Abstract. Darwo, Bogidarmanti R. 2016. The cultivation of bintangur (Callophyllum soulatri) prospects to be developed in peatlands. Pros Sem Nas Masy Biodiv Indon 2: 267-270. Peatlands have limited species to be developed as industrial plantations forest. Bintangur (Callophyllum soulatri Burm.F.) is one of the original species in the peatland area. Currently, bintangur has not been developed extensively as industrial plantations forest. Economically, bintangur has a high value of benefits that wood can be used as raw material for pulp and fruit can be used as a source of biofuel. The aims of this study were to evaluate the extent of its ability to grow and characteristics of bintangur in peatland area. The trial planting at a spacing of 3 x 3 m 2 and observation made after 4 years old after planting with the measured parameter were the diameter at breast height, total height and survival rate. Data analysis was conducted to know the average and standard deviation. The results showed that bintangur easily propagated from wildlings and seeds. At the age of 4 years gained an average diameter at breast height of 3.82 ± 0.90 cm and a total height of 3.39 ± 0.72 m in diameter increment of 0.95 cm/year and high increment of 0.85 m/year. Bintangur can grow well in open peatlands with survival rates of 75 ± 15.2 % and the age of 3 years has borne fruit. Therefore, the plant bintangur potential to be developed as plantations producing wood pulp and energy.

Currently the type of wood in community forests on Java Island is dominated by sengon species. However, this type faces problems with attacks of gall rust diseases One of the potential species as a substitute for light construction wood is binuang bini (Octomeles sumatrana Miq.). To increase stand productivity, it is necessary to apply the right silvicultural techniques. The purpose of this study was to find out the right silvicultural technique in order to increase the productivity of the binuang bini stands. The study design used a split plot design. The results showed that the organic fertilizer dose had a significant effect on the growth of the diameter and height of binuang bini stands. Fertilizing used bioactive compost charcoal with a dosage of 4 kg / planting hole can increase the growth in height and diameter of binuang bini plants was twice that of control treatment at the age of 30 months after planting. The pattern of binuang bini planting can be mixed with the other species such as Mindi (Melia azedarach L.) and/or Trema (Trema orientalis L.)