Hutan rakyat jati ( L.f) sudah banyak dikembangkan di Kecamatan Nusa Penida, umumnya ditanam pada lahan-lahan kosong dengan kondisi tanah relatif kritis. Akan tetapi, Informasi kuantitatif seperti data riap dan potensi tegakan jati masih relatif kurang. Penelitian bertujuan memperoleh model dugaan volume dan informasi riap tegakan jati. Penelitian dilakukan secara di enam desa pada bulan Mei hingga Juni 2009, dengan melakukan survey potensi jati yang berdiameter batang (dbh) ≥ 10 cm. Parameter yang diukur pada setiap pohon adalah diameter dbh (D), tinggi pohon (T), tahun tanam, kerapatan tegakan, dan lain-lain. Berdasarkan hasil survey, dipilih 117 pohon sebagai pohon contoh dengan melakukan pengukuran batang perseksi setiap panjang 1m untuk memperoleh volume pohon jati aktual. Hasil penelitian adalah sebagai berikut : 1) model penduga volume pada tinggi pohon diameter 10 cm adalah = 0,00006 D dan = 0,00012 D T , pada tinggi pohon bebas cabang adalah = 0,000245 D dan = 0,00011 D T , dan pada tinggi pohon pangkal tajuk adalah = 0,00025 D dan = 0,00011 D T ; 2) angka bentuk batang jati rata-rata (f) adalah adalah 0,72 ; dan 3) riap tegakan jati adalah riap diameter sampai 2,25 cm/tahun dan riap tinggi pohon sampai 1,97 m/tahun. ABSTRACTCommunity teakwood plantation ( L.f) has been grown at Nusa Penida on unused and critical land. However, quantitative information about growth and potency of teakwood stand is still rare. The research was aimed to obtain volume estimation model and increment information of teakwood stand. The research was conducted at six villages from May to June 2009. The parameter measured in a survey of potency were diameter (D), height of tree (T), age of stand, density of stand, etc. Based on survey result, 117 trees were sellected for tree volume estimation by measuring the actual volume through measuring diameter of stem in each section (1 m length). The results were follow : 1) the estimation model of volume until stem height with 10 cm diameter were v = 0.00006 D and v = 0.00012 D T , until height of branch free stem were v = 0.000245 D and v = 0.00011 D T , and until height of crown base were v = 0.00025 D and v = 0.00011 D T ; 2) the form factor of stem until height of stem with 10 cm diameter was 0.72 ; and 3) the increment of teakwood stand were diameter increment up to 2.25 cm/year and heiht increment up to 1.97 m/year. 2,084 2,014 0,66 3
Duabanga (Duabanga moluccana Bl.) is one of the exellent commodities for Nusa Tenggara Barat (NTB). Wood product of this species for construction, building material, and furniture. The species has developed for people forest in Lombok Island. However, the quantitative information about its stand growth is lack. The research was aimed at obtaining the information of stand growth as well as growth and yield models of sustainable stand management. The research was conducted at the Rarung Research Forest which is located in the Rinjani Forest Group,
ABSTRAKEra globalisasi membuka wacana sendiri bagi negara ini, termasuk pergeseran nilai dalam cara bergaul para remaja yang bebas dan cenderung tanap batas, selain ada dampak baik dan buruk dalam globalisasi dan pengaruhnya pada remaja, hal ini disebabkan dorongan seksual yang sedang berkembang pada masa remaja, perilaku seks pada remaja yang tidak sehat dapat berakibat buruk bagi remaja sendiri, misalnya: kehamilan diluar nikah, aborsi, terjadinya PMS, kematian AKI dan AKB, serta gangguan psikologi. Dalam penelitian ini variabelnya adalah pengetahuan penyimpangan perilaku seks, penelitian ini menggunakan metode deskriptif studi perbandingan (comparatif study), sampel penelitian ini 103 siswa SMA Yapita Surabaya dan 67 siswa MA Roudlotul Muta'abidin Lamongan. Dari hasil penelitian didapatkan gambaran pengetahuan tentang penyimpangan perilaku seks khususnya variabel pelecehan seksual, di SMA Yapita Surabaya sebesar 54 (52,4%) dengan kriteria cukup dan di MA Roudlotul Muta'abidin Lamongan sebesar 36 (53, 7%) dengan kriteria kurang. sehingga dapat disimpulkan tidak ada perbedaan penyimpangan perilaku seks baik di SMA Yapita Surabaya dan di MA Roudlotul Muta'abidin Lamongan. Sehingga perlu diadakan pendidikan seks khusus untuk remaja. Penelitian ini dapat digunakan sebagai rekomendasi untuk penelitian selanjutnya, dengan menggunakan sampel yang lebih besar dan meneliti gambaran mengenai kejadian penyimpangan perilaku seks pada variabel yang lain.Kata Kunci : Pengetahuan, perilaku seks, penyimpangan.
Developing agroforestry systems in private forests is expected to increase productivity. This study aims to determine the appropriate agroforestry design for Falcataria moluccana-based private forests in Central Lombok Regency. Three intercrop species were tested: small taro (Colocasia esculenta), ginger (Zingiber officinale), and vanilla (Vanilla planifolia Andrews). This study was established using a completely randomized design. The three planting combinations were examined in three replications for a total of nine test plots: F. moluccana+vanilla+small taro (FmVT), F. moluccana+vanilla+ginger (FmVG), and F. moluccana+vanilla+ginger+small taro (FmVGT). Each test plot was 10 x 10 m and was located at 3 x 3 m spacing under a 3-year-old F. moluccana stand. The measured variables were crop survival rates, plant yields, and microclimatic data. The correlation between the variables was examined using the Pearson Product Moment, Duncan's advanced multiple range test (DMRT), and analysis of variance (ANOVA). The market price was used to determine the crop's economic value. The best agroforestry design was based on the economic value of crop production and the land equivalent ratio. The results indicated that the combination of F. moluccana, vanilla, ginger, and small taro, which generated an additional income of IDR 11,851,250 ha-1 a year, should be widely promoted and adopted.
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