Komposisi Jenis Dan Struktur Tumbuhan Bawah Pada Hutan Tanaman Jati Bertumbuhan Ketela Pohon Di KPH Ngawi, Jawa Timur

The existence of Cassava under the Teak stand, in Ngawi Forest District, have change the undergrowth species composition and their ecological structure. Based on the research results of the different age class of teak plantation forest (II – V) could be concluded that the species composition of undergrowth tend to decrease either species number or individual number of each species. Only 4 species from 21 species of undergrowth that were found in all of the research compartments those are Hoplismenus burmani, Clitoria ternatea, Eupatorium odoratum and Synedrela nudiflora; and their distribution were horizontally aggregated. For vertical structure of the undergrowth community were not different for each compartment with Cassava. The nutrients rate information of the soil under teak stand with cassava showed low enough

Pengaruh Komposisi dan Bahan Media terhadap Pertumbuhan Semai Pinus ( Pinus Merkusii)

Sifat fisika-kimia media tumbuh, khususnya porositas dan ketersediaan nutrisi diperlukan untuk memproduksi semai pinus ( Jungh et de Vries) yang berkualitas. Daun segar dan seresah daun pinus dapat digunakan sebagai media tumbuh yang dapat memenuhi persyaratan yang dimaksud. Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh komposisi dan bahan media terhadap pertumbuhan semai pinus. Penelitian ini merupakan percobaan faktorial dengan rancangan acak lengkap berblok, dengan dua faktor dan tiga blok sebagai ulangan. Faktor pertama adalah bahan daun pinus (A) yaitu: daun segar kasar, seresah daun kasar dan seresah daun halus. Faktor kedua adalah aras pupuk organik dan tanah (B), yaitu masing-masing dengan aras: 45%, 35%, 25% dan 15%. Analisis varians bersarang digunakan untuk menganalisis data yang diperoleh. Parameter yang diukur adalah kandungan N, nisbah C/N media tumbuh serta pertumbuhan tinggi dan diameter semai pinus. Pertumbuhan semai pinus terbaik didapatkan melalui komposisi media dengan perlakuan 35% pupuk organik, 35% tanahdan 30% daun segar kasar (B A ). Bahan daun segar kasar mempunyai kandungan N tertinggi dan nisbah C/N terendah, serta menghasilkan pertumbuhan semai terbaik. Komposisi media direkomendasikan sebagaimediatumbuhuntukmemproduksisemaipinus

Pengaruh Komposisi dan Bahan Media terhadap Pertumbuhan Semai Pinus (Pinus Merkusii)

Sifat fisika-kimia media tumbuh, khususnya porositas dan ketersediaan nutrisi diperlukan untuk memproduksi semai pinus (Pinus merkusii Jungh et de Vries) yang berkualitas. Daun segar dan seresah daun pinus dapat digunakan sebagai media tumbuh yang dapat memenuhi persyaratan yang dimaksud. Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh komposisi dan bahan media terhadap pertumbuhan semai pinus. Penelitian ini merupakan percobaan faktorial dengan rancangan acak lengkap berblok, dengan dua faktor dan tiga blok sebagai ulangan. Faktor pertama adalah bahan daun pinus (A) yaitu: daun segar kasar, seresah daun kasar dan seresah daun halus. Faktor kedua adalah aras pupuk organik dan tanah (B), yaitu masing-masing dengan aras: 45%, 35%, 25% dan 15%. Analisis varians bersarang digunakan untuk menganalisis data yang diperoleh. Parameter yang diukur adalah kandungan N, nisbah C/N media tumbuh serta pertumbuhan tinggi dan diameter semai pinus. Pertumbuhan semai pinus terbaik didapatkan melalui komposisi media dengan perlakuan35% pupuk organik, 35% tanah dan 30% daun segar kasar (B2A3). Bahan daun segar kasar mempunyai kandungan N tertinggi dan nisbah C/N terendah, serta menghasilkan pertumbuhan semai terbaik. Komposisi media B2A3 direkomendasikan sebagai media tumbuh untuk memproduksi semai pinus

Impact Of Tropical Rain Forest Conversion On The Diversity And Abundance Of Termites In Jambi Province (Dampak Konversi Hutan Tropika Basah terhadap Keragaman Jenis dan Kelimpahan Rayap di Provinsi Jambi)

The degradation of tropical rain forest might exert impacts on biodiversity loss and affect the function and stability of the ecosystems. The objective of this study was to clarify the impacts of tropical rain forests conversion into other land-uses on the diversity and abundance of termites in Jambi, Sumatera. Six land use types used in this study were primary forest, secondary forest, rubber plantation, oil-palm plantation, cassava cultivation and Imperata grassland. The result showed that a total of 30 termite species were found in the six land use types, with highest species richness and abundance in the forests. The species richness and the relative abundance of termites decreased significantly when the tropical rain forests were converted to rubber plantation and oil-palm plantation. The loss of species richness was much greater when the forests were changed to cassava cultivation and Imperata grassland, while their abundance greatly decreased when the forests were degraded to Imperata grassland. Termite species which had high relative abundances in primary and secondary forests were Dicuspiditermes nemorosus, Schedorhinotermes medioobscurus, Nasutitermes longinasus and Procapritermes setiger

Peranan Bahan Organik Bernisbah C/n Rendah Dan Cacing Tanah Untuk Mendekomposisi Limbah Kui.it Kayu Gmelina Arborea (the Roles of Low C/n Ratio Organic Matters and Earthworms to Decompose Waste Barks of Gmelina Arborea)

Waste barks potentially caused negative environment impacts if they are not handled properly. As organic materials, they actually can be used as raw materials to produce compost. Objective of this research was to clarify the roles of low C/N organic matters and earthworms to decrease C/N ratio and increase nutrient contents of the barks compost. The experiment used a completely randomized design with two factors and five replications. The first factors was addition of low C/N ratio organic matters, i.e.leaves of Glyricidea maculate and Gmelina arborea, the second factor was species of earthworm, i.e. Lumbricus rubellus (C1) and Eisenia foetida (C2). Parameters used were contents of carbon ©, and several macro nutrients, i.e. nitrogen (N), fosfor (P), kalium (K), calcium (Ca) and magnesium (Mg) of the wasted bark compost. Addition of low C/N ratio matters and earthworms was environmentally sound to handle the wasted barks. Adiition of the organic matters has significantly decreased the C/N ratio and increased the content of N, P, K, Ca and Mg of the wasted bark compost. The C/N ratio of the bark compost decreased lower and the contents of N, P, K, Ca and Mg increased higher by more addition of the low C/N matters. Earthworms showed their significant roles to decrease the C/N ratio and increase the contents of N, P, K, Ca and Mg of the waste bark compost. Mean C/N ratio of the bark compost (C0) was 56,17, and by the earthworm treatments it decreased significantly to 26,66 (C1) and 22,94 (C2). Mean N content of the bark compost (C0) was only 0,89 %, and by the earthworm activities it increased significantly to 1,34 % (C1) and 1,41 % (C2). The decreases of C/N ratios and increases of the nutrients by the earthworm activities in the bark compost would be higher when they were combined with the addition of low C/N ratio organic matters

Percepatan Kemampuan Berakar Dan Perkembangan Akar Stek Pucuk Shorea Platyclados Melalui Aplikasi Zat Pengatur Tumbuh Iba

Shorea platyclados is one of fast-growing Dipterocarp species for enrichment planting in Logged-Over Area (LOA) of tropical rain forests. One of the constrain to supply the seedling for support enrichment planting is the irregular flowering of S. platyclados. Moreover, the vegetative propagation is an alternative method to provide the sustainable seedling for enrichment planting in the LOA. This experiment was carried out to assess the effects of IBA concentrations on rooting ability, the primary and secondary root lengths, and the accumulated number of primary and secondary roots on shoot cutting of S. platyclados. The research was conducted in Completly Randomized Design (CRD) with 5 replications. The treatment was five concentrations of IBA, i.e. 0 ppm, 25 ppm, 50 ppm, 75 ppm, and 100 ppm. The data were analyzed using one-way analysis of variance (one way ANOVA) to determine the effect of IBA concentration variation amongst the treatments. The Duncan Multiple Range Test (DMRT) was used for multiple comparisons among the means of treatment at tα=5%, Results showed IBA concentrations significantly affected the rotting ability, the primary and secondary root length of shoot cutting (P 0.05). For rooting ability, 100 ppm of IBA concentration was the highest of all treatments. Meanwhile, 75 ppm of IBA concentration was the best treatment for development of root, i.e. the number of primary roots, the length primary and secondary roots