Judul: Potensi Trichoderma harzianum (T38) dan Trichoderma pseudokoningii (T39) sebagai  antagonis terhadap Ganoderma sp. enyebab penyakit akar pada pohon sengon (Paraserianthes falcataria (L) Nielsen)
Abstrak: Sengon merupakan salah satu tanaman kehutanan yang banyak dikembangkan dalam program pembangunan hutan. Dalam pengelolaannya, tanaman sengon kerap kali diserang fungi busuk akar (Ganoderma sp.). Isolat Trichoderma harzianum (T38) dan isolat Trichoderma pseudokoningii (T39) merupakan pilihan alernatif dalam mengendalikan Ganoderma sp. secara hayati. Penelitian ini bertujuan untuk mengetahui potensi isolat T38 dan T39 sebagai agen antagonis dalam pengendalian Ganoderma sp..
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Judul: Potensi Trichoderma spp. Sebagai Agens Hayati dalam Pengendalian Ganoderma sp. yang Menyerang Tanaman Sengon
Abstrak: Sengon (Falcataria mollucana) is one of the forestry plant that widely developed by the community of Indonesia farmers especially in Java Island. Nowadays, sengon is widely planted with a monoculture system, therefore emerging many serious problems in silvi-culture. One of the serious problems was attacked by the pathogenic fungi, Ganoderma sp., which mainly caused root rot diseases. This research was aimed to investigate the ability of Trichoderma spp. in controlling the in vitro growth of Ganoderma sp. and to evaluate the capability of T. harzianum in inhibiting the growth of Ganoderma sp. on sengon timber substrate at greenhouse. This research was carried out in three experimental stages as follow: stage 1: study the growth activity of Ganoderma sp.; stage 2: study the inhibition activity of Trichoderma spp. towards the growth of Ganoderma sp. and stage 3: control the growth of Ganoderma sp. on Sengon timber substrate at greenhouse. Our results showed that the growth rate of Ganoderma sp. was expert on PDA and MEA medium each 12 days and 14 days incubation, respectively. Afterwards, the petridish was full of the Ganoderma sp. mycelium after 14 days incubation. In this study, the average value of the growth of Ganoderma sp. on PDA medium (7.09 mm day-1) was significantly differs to the growth of Ganoderma sp. on MEA medium (5.41 mm day-1). Besides of that, the fastest growth of Trichoderma spp. was shown by T. pseudokoningii such as 38.14 mm day-1 and significantly differs to T. viride, 27.71 mm day-1 and T. harzianum, 26.31 mm day-1. Based on antagonistic test, T. harzianum exhibited the best inhibition to Ganoderma sp. on PDA medium up to 74.19% and significantly differ to T. pseudokoningii 59.37% and T. viride 41.36%. Similarly on MEA medium treatment T. harzianum exhibited the best inhibition to Ganoderma sp. up to 73.00% and significantly differ to T. pseudokoningii 60.22% and T. viride 51.58%. The inhibition growth of Ganoderma sp. on sengon timber substrate at greenhouse showed that after 1 week, there was a decreasing growth of Ganoderma sp. mycelium when the sengon timber was submerged (Xt1) and obtained the highest value of inhibition up to 1.12 cm on sterile soil treatment + T. harzianum, whilst on sterile soil treatment without T. harzianum, there was an increasing growth of Ganoderma sp. mycelium up to 0.67 cm. Likewise, after 2 weeks of sengon timber submersion (Xt2) on sterile soil treatment + T. harzianum there was a decreasing growth of Ganoderma’s mycelium up to 2.41 cm, whereas on sterile soil treatment without T. harzianum, there was an increasing growth of Ganoderma sp. mycelium up to 1.22 cm.
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Judul: Distribusi Massa Air Laut Jawa dari Data Hidrografi MAJAFLOX Cruise 2015.
Abstrak: Laut Jawa merupakan perairan dangkal yang dipengaruhi oleh Angin Muson dan Arlindo Selat Makassar. Pemahaman tentang stratifikasi dan distribusi massa air Laut Jawa dapat dilakukan dengan adanya data hidrografi dari MAJAFLOX Cruise pada bulan Agustus 2015. Data hidrografi didapatkan dari penurunan CTD di 14 stasiun pengamatan. Hasil penelitan menunjukkan bahwa stratifikasi vertikal massa air dicirikan oleh lapisan homogen yang kuat dari permukaan hingga dasar perairan. Hal tersebut terjadi akibat percampuran massa air yang kuat oleh aksi gelombang yang dibangkitkan Angin Muson Tenggara. Selain itu, ditemukan variasi spasial dalam arah utara-selatan, dimana karakteristik massa air di tepi selatan dan utara cukup berbeda dengan massa air di tengahnya. Massa air Laut Jawa pada puncak musim timur (Agustus) dicirikan dengan massa air yang hangat (27,18 °C – 28,11 °C), bersalinitas rendah (33,58 psu – 34,2 psu), dan ringan (21,33 kg/m3 – 22,06 kg/m3), kecuali pada stasiun 1 dan stasiun 5 yang cenderung lebih hangat dan lebih tawar dari stasiun lainnya. Pola sirkulasi permukaan menunjukkan salinitas yang relatif tinggi di bagian tengah Laut Jawa dan diduga berhubungan dengan suplai massa air Arlindo Selat Makassar. Variasi tahunan dari analisis keluaran model INDESO menunjukkan adanya stratifikasi massa air yang kuat pada musim peralihan.
Keyword: angin muson, keluaran model INDESO, MAJAFLOX Cruise 2015, pengukuran CTD, stratifikasi massa air