Anwar, RB Moh Nurul (2013) Pengaruh Fluktuasi Curah Hujan Terhadap Sensitivitas Tanaman Kentang (Solanum tuberosum L.). Sarjana thesis, Universitas Brawijaya.
Abstract
Curah hujan merupakan salah satu unsur iklim yang penting karena memiliki tingkat variabilitas yang sangat tinggi terhadap waktu dan ruang. Variabilitas dan fluktuasi curah hujan menimbulkan interaksi-interaksi seperti kejadian El Nino dan La Nina. Kejadian El Nino biasanya terjadi pada musim kemarau dan menimbulkan dampak penurunan curah hujan, musim kemarau yang lebih panjang, dan penurunan ketersediaan air irigasi. Sebaliknya, anomali iklim La Nina umumnya terjadi pada musim hujan dan menimbulkan peningkatan curah hujan di atas curah hujan normalnya. Tujuan dari penelitian ini adalah : (1). Menganalisis sifat hujan akibat perubahan iklim dan pengaruhnya terhadap pertumbuhan dan produksi tanaman kentang. (2). Mengevaluasi sensitivitas pertumbuhan dan produksi tanaman kentang akibat ketidaknormalan curah hujan. Hipotesisnya adalah : (1). Intensitas ketidaknormalan curah hujan semakin sering dan tanaman kentang sering mengalami defisit atau kelebihan air pada perkembangannya. (2). Kekurangan dan kelebihan curah hujan berpengaruh negatif terhadap pertumbuhan dan produksi tanaman kentang. Penelitian dilakukan di rumah kaca kebun percobaan Fakultas Pertanian Universitas Brawijaya Malang yang berlokasi di dusun Cangar, desa Sumber Brantas, kecamatan Bumiaji, kota Batu. Pelaksanaan penelitian dimulai pada bulan April – September 2012. Penelitian ini dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 7 perlakuan dan diulang 3 kali. Perlakuan dalam penelitian ini adalah : (1). Hujan dengan penambahan air irigasi/kontrol (K) , (2). Hujan dibawah normal 1 (BN1), (3). Hujan dibawah normal 2 (BN2), (4). Hujan normal 1 (N1), (5). Hujan normal 2 (N2), (6). Hujan diatas normal 1 (AN1) dan (7). Hujan diatas normal 2 (AN2). Parameter Pengamatan Meliputi : tinggi tanaman, jumlah daun, diameter batang, berat kering tanaman, luas daun, jumlah umbi, diameter umbi, berat umbi, gradding, laju pertumbuhan tanaman relatif dan laju asimilasi bersih. Hasil penelitian ini menunjukkan bahwa : (1).Anomali iklim El Nino (Hujan Bawah Normal) menurun dalam frekuensi kejadiannya, sedangkan anomali iklim La Nina (Hujan Atas Normal) mengalami peningkatan meskipun frekuensi kejadian dan durasinya tidak menunjukkan hasil yang konsisten. (2). Produktivitas tanaman kentang tertinggi pada perlakuan Kontrol (K) sebesar 29 ton/ha sedangkan perlakuan Hujan Atas Normal 2 (AN2) menghasilkan produktivitas kentang terendah sebesar 9 ton/ha. (3).Tanaman kentang lebih tahan terhadap kondisi kekurangan air (Hujan Bawah Normal) dibandingkan dengan kondisi kelebihan air (Hujan Atas Normal). Berdasarkan kesimpulan no. 1 maka petani mengalami kerugian panen atas kondisi La Nina (Hujan Atas Normal) tersebut.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FP/2013/19/051302075 |
| Subjects: | 500 Natural sciences and mathematics > 551 Geology, hydrology, meteorology |
| Divisions: | Fakultas Pertanian > Ilmu Tanah |
| Depositing User: | Hasbi |
| Date Deposited: | 10 May 2013 09:28 |
| Last Modified: | 09 Dec 2021 03:35 |
| URI: | http://repository.ub.ac.id/id/eprint/129304 |
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