Judul: Tingkat Toleransi Mutan Tanaman Lamtoro (Leucaena leuchochepala) Tahan Kutu Loncat terhadap Cekaman Kekeringan
Abstrak: Leguminosa merupakan jenis hijauan pakan sumber protein, salah satu jenis leguminosa yang telah dikenal baik oleh peternak di Indonesia adalah lamtoro (Leucaena leucocephala) varietas Tarramba. Meskipun demikian hama kutu loncat merupakan hama utama yang menyerang tanaman lamtoro sehingga menyebabkan turunnya produksi. Hama kutu loncat termasuk dalam ordo Hemiptera famili Psyllidae. Hama kutu loncat dewasa meletakan telur pada pucuk tanaman yang dapat memenuhi seluruh permukaan tunas tanaman lamtoro. Karena hal tersebut populasi nimfa berkembang pada pucuk tanaman sangat tinggi dan meyebabkan anak daun tanaman mengeriting, menggulung, mengering kemudian gugur. Hama kutu loncat juga mengekresi embun madu yang segera di tumbuhi jamur jelaga yang menyebabkan pucuk tanaman dan daun berwarna kehitam-hitaman. Lamtoro memiliki tingkat adaptasi yang kurang baik dengan tanah kering. Penelitian ini di harapkan diperoleh mutan tanaman lamtoro tahan kutu loncat terhadap cekaman kekeringan. Rancangan penelitian yang digunakan adalah RAL dengan 5 perlakuan 651 ulangan. Analisis data menggunakan Anova Unbalanced berdasarkan perbedaan sumber mutan tanaman lamtoro pada level yang berbeda 100 Gy (n= 82), 200 Gy (n= 153), 300 Gy (n=120), 400 Gy (n= 244), 500 Gy (n= 52) Selanjutnya jika terdapat perbedaan yang nyata akan dilakukan uji lanjut Duncan pada taraf 5%. Hasil penelitian pada interval penyiraman 7, 10 dan 12 hari pada parameter tinggi terlihat bahwa dengan level penyinaran 200 Gy, 300 Gy, 400 Gy dan 500 Gy lebih baik daripada penyinaran 100 Gy. Parameter diameter batang penyinaran 100 Gy lebih baik daripada level penyinaran 200 Gy, 300 Gy, 400 Gy dan 500 Gy. Kata Kunci: interval penyiraman, mutan lamtoro, sinar gamma, Leguminose is a type of forage as a protein source, one type of legume that is well known by breeders in Indonesia is lamtoro (Leucaena leucocephala) Tarramba variety. However, the fleas are the main pests that attack the lamtoro plant, causing a decrease in production. Pests fleas jump included in the order Hemiptera family Psyllidae. Adult fleas lay eggs on plant shoots that can cover the entire surface of lamtoro plant shoots. Because of this, the population of nymphs growing at the top of the plant is very high and causes the leaflets to curl, curl, dry and then fall. The fleas also secrete honeydew which is soon overgrown with sooty fungus which causes the shoots and leaves to turn black. Lamtoro has a poor adaptability to dry soil. It is hoped that this research will obtain a mutant plant lamtoro against drought stress. The research design used was RAL with 5 treatments with 651 replications. Data analysis using Unbalanced ANOVA based on different sources of mutant plants lamtoro at different levels 100 Gy (n= 82), 200 Gy (n= 153), 300 Gy (n=120), 400 Gy (n = 244), 500 Gy (n = 52) Furthermore, if there is a significant difference, Duncan's further test will be carried out at the 5% level. The results of the study at intervals of 7, 10 and 12 days at high parameters showed that the irradiation levels of 200 Gy, 300 Gy, 400 Gy and 500 Gy were better than 100 Gy irradiation. Parameters of 100 Gy irradiation rod diameter were better than 200
Keyword: watering interval, lamtoro mutant, gamma rays

Judul: Growth Characteristics of the Lamtoro Mutant Candidate  (Leucaena leucocephala cv. Tarramba) M2 Generation Tolerant of Acid Stress
Abstrak: Varietas tanaman Lamtoro yang toleran terhadap tanah masam perlu dikembangkan agar tanah masam menjadi produktif dan dapat dimanfaatkan untuk meningkatkan produksi tanaman. Penelitian ini bertujuan untuk mengukur sifat morfologi dan mutu benih serta mengevaluasi pertumbuhan tanaman mutan lamtoro beradaptasi pada tanah masam hasil iradiasi sinar gamma melalui kultur jaringan sehingga diperoleh mutan dengan mutu benih unggul. Sebanyak 4 kandidat mutan lamtoro digunakan dalam penelitian ini, dan mereka telah mengembangkan adaptasi terhadap tanah masam. Penelitian dilakukan dengan menggunakan rancangan acak lengkap; 4 kandidat mutan dan satu tanaman kontrol digunakan sebagai perlakuan. Analisis data yang digunakan dalam penelitian ini adalah koefisien variasi, Analysis of Variance (ANOVA) dan dilanjutkan dengan Uji Jarak Berganda Duncan jika terdapat pengaruh yang signifikan. Karakteristik tanaman kandidat mutan lamtoro generasi M1 bervariasi pada karakter diameter batang, sedangkan tidak bervariasi pada karakter tinggi kanopi, jumlah cabang, dan jumlah ranting. Dominasi sifat polong dan biji terbaik pada calon mutan lamtoro (M2) didominasi oleh calon mutan GLM.1. Seluruh kandidat mutan lamtoro memiliki warna biji yang normal. Berat 100 benih tertinggi diekspresikan oleh kandidat mutan lamtoro GLM.9. Pengelompokan benih kecil, sedang, dan besar secara berturut diekspresikan oleh kandidat mutan GLM.8, GLM.10, dan GLM 9. Tanaman lamtoro GLM.0 dan kandidat mutan lamtoro GLM.8 menunjukkan persentase viabilitas tertinggi. Kandidat mutan lamtoro GLM.8 menunjukkan persentase viabilitas pada media asam tertinggi. Ukuran benih dan viabilitas benih memiliki nilai korelasi yang negatif. Kandidat mutan lamtoro GLM.9 menunjukkan angka kematian tertinggi, sedangkan tingkat kerugian tertinggi ditunjukkan oleh GLM.10. Kandidat mutan lamtoro GLM.9 menunjukkan waktu munculnya tunas tercepat. Seluruh kandidat mutan menunjukkan variasi yang tinggi pada pertambahan tinggi vertikal. Kandidat mutan GLM.1 dan GLM.9 menunjukkan ekspresi jumlah cabang terbaik. Kandidat mutan GLM.1 menunjukkan ekspresi jumlah daun terbaik. Seluruh kandidat mutan lamtoro memiliki warna daun yang normal., Lamtoro plant varieties that are tolerant of acidic soil need to be developed so that acidic soil becomes productive and can be used to increase crop production. This research aims to measure morphological characteristics and seed quality and evaluate the growth of lamtoro mutant plants adapted to acid soil resulting from gamma-irradiation through tissue culture to obtain mutants with superior seed quality. A total of 4 mutant candidates of lamtoro were used in this study, and they had developed adaptation to acidic soils. The research was conducted using a completely randomized design; 4 mutant candidates and one control plant were used as treatments. The data analysis used in this research is the coefficient of variation, analysis of variance (ANOVA) and continued with the duncan multiple range test (DMRT) if there is a significant influence. The characteristics of the M1 generation lamtoro mutant candidate plants varied in stem diameter, while they did not vary in canopy height, number of branches, and number of twigs. The best pod and seed traits in the lamtoro (M2) mutant candidate are dominated by the GLM.1 mutant candidate. All lamtoro mutant candidates have standard seed color. The lamtoro GLM.9 mutant candidate expressed the highest weight of 100 seeds. Groupings of small, medium, and large seeds were expressed respectively by candidate mutants GLM.8, GLM.10, and GLM 9. Lamtoro GLM.0 plants and candidate
Keyword: kandidat mutan, lamtoro, tanah asam

Judul: Pranata dan Modal Sosial dalam Komunitas Virtual (Studi Kasus Komunitas Virtual Kaskus)
Abstrak: Virtual community is a new form of community that generated by internet.Virtual community has great potention to build social capital that disappearing from real life.Virtual community is important not only socially but also economically and politically. Virtual community has a fundamental difference with the physical community because its members do not have geographic proximity, it becomes strongnesses and weaknesses. This research is using descriptive qualitative metode which aims to provide a picture of a virtual community based on social institutions and capital in it. The existence of institutions and social capital provide initial description of the potential of virtual community. The study found social institutions and capital in virtual community of Kaskus. However, social institutions and capital have different forms and has its own advantages and limitations when compared with the physical community.
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