Judul: The Growth of Silkworm ( Bombyx mori L. ) New Hybrid and Commersial's Type
Abstrak: Silkworm larvae has a silk gland that produces silk threads. Silk thread quality is obtained from a qualified cocoon. Clean cocoons with no stains and have a strong fiber will havea high value. To attain qualified cocoons then the larvae feed consumption must be taken into account. The feed consumed will affect the growth performances such as body weight and body weight gain which are the most decisive indicator of the quality of cocoon. This study aimed to evaluate the growth of new hybridobtained from reciprocal cross breeding system and commercial type. The Completely Randomized Design was used as the experimental design with six hybrids as the treatment, i.e. H1 (Mainland China rase 808♂ X Japan race 108 ♀), H2 (Mainland China race 903 ♂ X Japan race 806 ♀), H3(Japan race 903 ♀ X Mainland China race 806 ♂), H4 (Mainland China race 808 ♀ X Japan race 108 ♂), H5 (commercial silkworm C301), and H6 (commercial silkworm BS09). The data taken from 30 larvae hybrid each were analyzed by ANOVA (95%) and then by Tukey test. The results showed that H2 (Mainland China race 903 ♂ X Japan race 806 ♀) was superior hybrid than any hybrid based on the variables of feed consumption, body weight gain, feed conversion, and mortality.
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Judul: Kualitas Kokon Hasil Silangan Ulat Sutera (Bombyx mori L.) Ras Cina dengan Ras Jepang Secara Resiprokal
Abstrak: This research aimed to evaluate the results of reciprocal crossbreeding between Chinesse silkworm race with Japanesse silkworm race reciprocally, and then compared them with the commercial silkworm races. There were six crossings to evaluate, the silkworm reciprocal crossbreed were female 108 Japanesse crossed male 808 Chinesse (P1), female 808 Chinesse crossed male 108 Japanesse (P2), female Chinesse 806 crossed male 903 Japanesse (P3), female 903 Japanesse crossed male 806 Chinesse (P4) and the commercial silkworm races BS09 (P5) and C301 (P6). There were four variables evaluated, including weight of cocoon, percentage of cocoon’s shell, rendement of rearing, and percentage of normal cocoon. The results showed that reciprocal gave significant effect on weight of cocoon in the first reciprocal (P1 and P2). In the other hand, it gave no significant effect on percentage of cocoon’s shell, rendement of rearing and percentage of normal cocoon. In the second reciprocal (P3 and P4) there was not significant different on every observed variables. The reciprocal crossbreeds (P1, P2, P3, and P4) had higher weight of cocoon than P6. The reciprocal crossbreeds were also had no significant difference with P6 in percentage of cocoon’s shell, rendement of rearing and percentage of normal cocoon. Even though, only P1, P3, and P4 had no significant difference with P5 on all observed variables.
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Judul: Perencanan Lanskap Sunda Kalapa, Jakarta Utara Sebagai Kawasan W isata Sejarah
Abstrak: Perkembangan kota Jakarta dari waktu ke waktu sangatlah cepat, sehingga menyebabkan kota-kota tua banyak yang tergusur untuk dijadikan daerah baru yang lebih modern. Apabila hal tersebut tidak ditanggulangi secara dini maka keberadaan Kota Lama Jakarta akan hilang. Hal inilah yang melatar belakang untuk dilakukan tindakan perlindungan dan revitalisasi kawasan bersejarah Sunda Kalapa.
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