Although Gyrinops versteegii has been domesticated by local community in Sragen Regency, the environmental factor and species which high compatibility with G. versteegii still not know yet. The objectives of this s have have n research were 1) o know which one of those vegetation communities that gives the best the diameter and height t growth of the domesticated G. versteegii 2) to know the environmental factors that influenced the growth of the , and diameter and height of the domesticated G. versteegii. Sampling was done systematically with a plot of size 20 20m × for trees, 10 10m for poles, and 5 5m for saplings with a total of 28 plots. SPSS Program version 22 was used for × × cluster, one-way anova, correlation, and multiple regression analysis. The results showed that for achieving the best G. versteegii growth, the G. versteegii should be planted under the community group which was dominated by Paraserianthes falcataria, T grandis, Gliricidia sepium and Eugenia aquea. Environmental factors affecting . , diameter growth of G. verteegii were organic carbon of the soil and the vegetation density. Meanwhile the environmental factors affecting the height growth of G. versteegii were temperature, light intensity, relative light intensity, organic carbon, C N ratio, P, Mg, air humidity, and clay content.
The Sumatran elephant (Elephas maximus sumatrensis) is a rare animal that is threatened with extinction, so conservation is needed. Elephant Training Center (PLG) Way Kambas National Park is one form of in situ conservation. The availability of natural food is one of the factors that determine the success of conservation. The purpose of this study was to determine the composition and diversity of forest community species as elephant feeding habitats, and to determine the types of plants that elephants eat. Purposive sampling was used to collect data using nested plots, 1 x 1 m2 for seedlings and undergrowth, 5 x 5 m2 for saplings, 10 x 10 m2 for poles and 20 x 20 m2 for trees. The results showed that the vegetation making up the forest as a grazing habitat for Sumatran elephants consisted of 27 species belonging to 19 families. The vegetation that elephants eat is Symplocos thwaitesii, Imperata cylindrica, Colopogonium sp., Bridelia monoica, Vitex pinnata, Shorea sp., Pennisetum purpureum, Gluta renghas, Mimosa pudica, and Melastoma. The most widely available plant species belong to the Poaceae and Leguminoceae families. The diversity index of the seedling level of 2.49 was categorized as high, while the vegetation level of sapling, poles, and trees was categorized as low. Meanwhile, the evenness index at the seedling, sapling, pole and tree levels was categorized as high. The richness index for all levels of growth is categorized as moderate.
Excoecaria agallocha merupakan salah satu jenis mangrove yang mempunyai peranan penting baik dari aspek ekologis maupun ekonomis. Jenis ini disamping dapat berfungsi sebagai pelindung pantai, juga dimanfaatkan sebagai tanaman obat. Populasi jenis ini terus menurun akibat penebangan yang tidak terkendali, sehingga perlu dilakukan penanaman kembali. Salah satu kendala dalam melakukan penanaman adalah ketersediaan bibit. Salah satu upaya untuk mencukupi bibit dilakukan melalui stek batang. Kendala pembuatan stek batang adalah kesulitan menumbuhkan akar dan tunas. Tujuan penelitian adalah untuk mengetahui jenis hormon dan konsentrasi yang paling baik dalam pembentukan akar dan tunas pada stek E. agallocha. Penelitian dilakukan selama 6 bulan di Dusun Sawo, Desa Wirokerten, Banguntapan, Bantul, Daerah Istimewa Yogyakarta. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap Faktorial dengan 2 perlakuan, yaitu jenis hormon dan konsentrasi. Perlakuan jenis hormon terdiri dari 3 taraf yaitu IAA, IBA, dan NAA. Sedangkan konsentrasi hormon terdiri dari 4 taraf yaitu 0, 1000, 2000 dan 3000 ppm. Masing-masing perlakuan diulang 3 kali. Jumlah unit sampel sebanyak 3 x 4 x 3 = 36. Untuk mengetahui pengaruh masing-masing perlakuan dilakukan analis varians, dengan uji lanjut DMRT. Komputasi digunakan software SPSS versi 22. Kesimpulan penelitian ini adalah (1) Kombinasi jenis dan konsentrasi hormon IAA, IBA dan NAA berpengaruh nyata terhadap jumlah tunas, berat basah dan berat kering tunas. (2) Kombinasi perlakuan hormon IAA dengan konsentrasi 2000 ppm dan kombinasi jenis hormon IBA dengan konsentrasi 3000 ppm menghasilkan panjang tunas stek batang Excoecaria agallocha paling besar. (3) Kombinasi perlakuan hormon IAA dengan konsentrasi 2000 ppm memberikan hasil berat basah dan berat kering tunas batang Excoecaria agallocha paling besar.
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