Judul: Pengukuran Fluks CO2 dan Neraca Karbon Sederhana Tanaman Jagung (Zea mays L.) pada Tanah Latosol Darmaga
Abstrak: Agricultural activities such as land preparation, irrigation and fertilization on agricultural land currently is one of the human activities accused on increasing greenhouse gas (GHG) emissions. Agricultural land in Indonesia are mostly mineral soil (78% of the total agricultural land). Therefore, it is important to study the CO2 emissions from tropical soils as part of the data collection effort (inventory) to support mitigation and adaptation activities on climate change. Soil fertility in mineral soil such as Latosol is generally low due to the low organic matter as well as nutrient availability. One among several ways to improve this soil fertility is adding with organic matter. This research’s purpose is determine: (1) the effect of adding organic matter to the total biomass of maize (Zea mays L.), (2) the effect of adding organic matter to the CO2 flux of soil planted by maize, (3) simple carbon balance of a maize which planted on soil with and without adding organic matter. Statistical design used was a completely randomized design (CRD) with regression analysis and the method of time average. The treatments tested, K: Control, KJ+P: Control + Maize + NPK Fertilizer, KBOJ+P: Control + Organik Matter + Maize + NPK fertilizer. The experiment showed that the addition of organic matter to the soil produced much higher in average production of dry biomass of maize (KBOJ+P = 27.82±5.94 g) rather than without added organic matter (KJ+P = 14.75±3.96 g) and its produced much higher flux CO2 (KBOJ+P = 0.11±0.08 mg CO2 /m2/det) rather than without added organic matter. (KJ+P = 0.09±0.06 mg CO2 /m2/det) and (K = 0.05±0.01 mg CO2 /m2/det). In simple carbon balance, the addition of organic materrs could increased the carbon lost in the form of CO2 flux (20%) and increased carbon in the soil (123%), however, did not significantly contribute to CO2 emissions because the organic matter also increased the amount of carbon that is absorbed by plants (89%). But the addition of organic matter did not has significant influence in improving the dry weight biomass total of maize, flux of CO2, carbon in soils, carbon absorbed by the plant and the carbon lost in the form of CO2 flux.
Keyword: simple carbon balance, organik matter, mineral soil, CO2 flux, Biomass

Judul: Pengaruh Pemberian Pupuk Organik pada Produksi dan Serapan Hara Jagung Manis (Zea mays) di Latosol, Darmaga
Abstrak: There are two form of organic fertilizers, solid and liquid. Solid organic fertilizer is usually applied to the soil. The advantage in application of organic fertilizers able to adsorb nutrients that easily lost and supply availability of nutrients and therefore can increase efficiency of fertilizer. The purpose of this study was to study the effect of organic fertilizer application on Latosol, Darmaga to production and nutrient uptake of corn as plant indicator. The experiment was conducted in the greenhouse by using completely randomized design consisting of seven treatments and each treatment was repeated four times so that there were 28 pot experiments. Seven treatments were consisted of control, standard, 75% PO + 50% S, 75% PO + 75% S; 100% PO + 50% S; 100% PO + 75% S, and 125% PO + 50% S. The parameters measured were plant height, weight of shoot, root weight, ear weight with and without cornhusk, uptake of N, P, and K nutrients in shoot and plant roots and the Corganic content, N-total, and CEC (cation exchange capacity) soil after the experiment. The result of experiment showed that the application of organic and anorganic (standard) fertilizer on plant height and weight of shoot was not significantly different than standard fertilizer (100% S). The weight of plant roots and nutrient uptake of N, P, and K of the shoot and plant roots in the treatment of 100% PO + 75% S was significantly higher than other treatments. Treatment combination of organic and anorganic (standard) fertilizer at the lower doses of standard recommendation significantly increased ear weight with and without cornhusk. Dosage recommendations based on the RAE value are the treatment of 100%PO + 50%S (158,66%) and 75%PO + 50%S (142,52%). The analysis of soil after the experiment showed that the use of organic fertilizer combined with anorganic fertilizer (standard) produced levels of C-organic, N-total, and the CEC soils tend to be higher than the standard (100% S) and control treatments. The use of organic fertilizer combined with anorganic (standard) fertilizer at lower doses (50% S and 75% S) increased effectiveness of fertilizer to increase the growth and production of corn.
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Judul: Warna bulu kucing ras persia: variasi pola warna dan pewarisannya
Abstrak: Kucing Persia mempakan kucing rasyang paling urnum dijumpai di Indonesia. Kucing Persia memiliki bulu yang panjang dengan variasi wama bulu yang sangat beragam. Perkawinan yang lebih terarah sangat perlu dilakukan untuk meningkatkan kualitas genetik warna dan pola wama bulu kucing. Penelitian ini bertujuan untuk rnempelajari variasi warna dan pola wama bulu kucing Persia yang terdapat di Indonesia, yang dilakukan di kantor pusat Cat Fancy Indonesia mulai bulan Oktober 2000 sampai Januari 2001. Data yang digunakan rnempakan data pedigree kucing Persia yang tercatat di Cat Fancy Indonesia dari tahun 1997 sampai Oktober 2001 yang terdiri dari 187 jantan dan 258 betina, selain itu juga dilakukan pengamatan langsung kepada tiga penyayang dan breeder kucing yang ada di Bandung.
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