Ilmu Pertanian (Agricultural Science)
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Tea Shoot Production In Relation to Rainfall, Solar Radiation and Temperature in Pagilaran tea estate,
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Use of Polyethylene Glycol (PEG) 8000 for In Vitro Screening of Potato Genotypes for Drought Tolerance: i. Root and Shoot Growth
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Seleksi Beberapa Kombinasi Persilangan Padi untuk Ketahanan Terhadap Keracunan Aluminium
No full textPemanfaatan Air Budidaya Lele Dumbo dengan Perlakuan Penggantian Air Berbeda Untuk Budidaya Tanaman Sawi
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The role of iron oxidizing bacteria to the quality of leachate on acid sulphate soil
Get PDFThe problem encountered in acid sulphate soil is the presence of pyrite (FeS2) which causes soil to have highly acid reaction when the pyrite is oxidized. The decline in quality not only occurs on the soil but also on the quality of the surrounding waters. One way to improve the quality of the leachate is by draining it through biofilter plants in the form of purun tikus (Eleocharis dulcis) and bulu babi (Eleocharis retroflaxa) which can absorb or neutralize these elements. The purpose of this research was to know the inoculant influence of iron oxidizing bacteria to leachate quality in acid sulphate soil. The research was conducted on a pot scale in greenhouse. The research was in randomized block design (RBD) of 3-factors with 3 replications. The first factor was inoculants, the second factor was water management, and the third one was phytoremediation material (Eleocharis dulcis and Eleocharis retroflaxa). The results showed that the plant height in the inoculant treatment+wood charcoal was in the range of 89.33−95.33 cm, while that in the inoculant treatment+husk charcoal was in the range of 89.50−93.00 cm. Meanwhile, the yield of rice with bacteria oxidizing iron inoculant+wood charcoal was higher, which was at 6.77 ton.ha-1 than inoculant treatment of oxidizing iron+husk charcoal which was only 5.95 ton.ha-1.
Kajian Infeksi Xanthomonas oryzae pv oryzae Terhadap Beberapa Genotipe Padi : Hubungan Kandungan Hara dengan Intensitas Penyakit
Get PDFPenelitian ini bertujuan untuk menguji tanggap beberapa materi genotipe/varietas padi di lapangan terhadap penyakit hawar daun bakteri (HDB) serta kaitannya dengan kadar nutrisi yang dianalisis setelah proses infeksi terjadi. Daun yang terinfeksi HDB menunjukkan kadar hara N dan P yang relatif tidak jauh berbeda; tetapi kandungan K dan protein terutama pada genotipe IR BB5 (xa-5) dan IR BB7 (Xa-7) sedikit lebih tinggi dibanding varietas lainnya. Cisadane yang menunjukan keparahan HDB paling rendah mempunyai kandungan N, P, K dan protein terkecil. Kandungan gula tanaman padi yang diuji bervariasi dengan kisaran 0,29% sampai 1,33%; masing-masing dengan kadar gula reduksi (GR) tertinggi pada genotipe/varietas Cisadane dan terendah pada varietas IR 64. Kandungan gula dalam tanaman padi tampaknya mempengaruhi ketahanan terhadap infeksi HDB. Umumnya makin tinggi kadar gula tanaman padi semakin menunjukkan keparahan HDB yang rendah dan sebaliknya. Demikian pula semakin tinggi nisbah GR/N akan semakin mengurangi kejadian HDB maupun keparahan HDB pada padi. Berdasarkan hasil monitoring ras dominan Xanthomonas oryzae pv oryzae (XOO) yang ada di lokasi percobaan baik terhadap kejadian maupun keparahan penyakit HDB dapat disimpulkan bahwa ras yang menginfeksi padi di lokasi Ciranjang-Cianjur pada MH 2007 adalah kelompok ras IV karena tidak satupun dari varietas diferensial yang diuji bereaksi tahan terhadap patogen XOO; yang ditunjukkan dengan kisaran keparahan penyakit HDB dari 20,3% sampai 83,3%
Morphological characteristics and yield performance of mutant soybean [Glycine max (L.) Merr.] M6 genotypes in Jatinangor, Sumedang, West Java
Get PDFCurrent breeding efforts in soybean largely focus on identifying genotypes with high seed yield and large seed size. Our study applied a mutation using 250 Gy Gamma-Ray Irradiation to soybean cv. Anjasari. The variability in the M1 generation was identified, and the planting was continued to M2 M3, M4, M5 until M6 generation. The objectives of this research were to evaluate mutant lines exhibiting a good performance in yield and morphological characteristics that can support the yield component in M6 generation. This research was conducted from January 2019 to May 2019 at Ciparanje Experiment Station, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, West Java. The experiment was arranged in a Randomized Completely Block Design with fifteen mutant soybean genotypes as treatments with two replications within each treatment. The results showed several genotypes produced higher yield and better agro-morphological characteristics. The genotypes MR-33, MR-4A, and MR-2A showed significantly higher number of total pods per plant. Meanwhile, the genotypes MR-35A, MR-37, MR-23, MR-36A, MR-3A, MR-29A MR-34A, MR-4A, MR-17, and MR-5A showed a higher value in weight of 100 seeds. The highest yield was observed in MR-29A and MR-23, which then will be used as the genotypes for multilocation test for stability