Maulida, DindaAzaliaRachma (2013) Dinamika Struktur Komunitas Tumbuhan Liar dan Pertumbuhan Padi Hitam di Sawah Organik Kecamatan Kepanjen Malang. Sarjana thesis, Universitas Brawijaya.
Abstract
Penelitian ini bertujuan untuk menentukan dinamika struktur komunitas tumbuhan liar selama pertumbuhan padi hitam di persawahan organik dan menentukan interaksi keberadaan tumbuhan liar pada pertumbuhan padi hitam di Kecamatan Kepanjen Kabupaten Malang. Percobaan lapangan ini dilakukan pada musim tanam November 2012 hingga Pebruari 2013. Pengamatan dilakukan dengan selected sampling berdasarkan pada pertumbuhan rumpun tanaman padi dan kelimpahan tumbuhan liar. Pertumbuhan padi hitam diamati selama empat fase pertumbuhan 28, 48, 88 dan 112 hst (hari setelah tanam) meliputi tinggi tanaman, biomassa, jumlah anakan, jumlah dan biomassa spikelet. Tumbuhan liar diamati secara sampling dengan luas petak 0,25 pada plot pengamatan pertumbuhan padi hitam. Secara simultan faktor abiotik yang diamati adalah tanah (berat jenis, bahan organik, pH dan konduktivitas) dan air sawah (pH dan konduktivitas). Hasil penelitian menunjukkan telah terjadi dinamika tumbuhan liar yang ditunjukkan oleh tingginya biomassa, persentase penutupan dan kekayaan spesies terutama umur 48 hst. Persentase penutupan, kekayaan spesies tumbuhan liar yang tinggi pasca penyiangan dan genangan air berdampak pada penurunan pertumbuhan padi hitam pada fase vegetatif. Pertumbuhan tinggi padi yang menurun saat fase vegetatif, telah mengalami recovery pada fase generatif namun hal ini tetap menyebabkan penurunan jumlah spikelet sebesar 25-70 %. Limnocharis flava, Monochoria vaginalis dan Echinocloa crusgalli bermanfaat bagi petani dan mendukung kehidupan padi.
English Abstract
The purpose of this study were determine weed structure dynamics during growth of organic black rice and to determine its interactions with weed black rice growth in Malang District Kepanjen. This field experiment was held in growing season of November 2012 to February 2013 using selected sampling plots based on rice growth weed abundance. Black rice growth was observed in four growth phases 28, 48, 88 and 112 dap (days after planting) including plant height, biomass, number of tillers, spikelet and biomass. Weed community structure dynamics were observed by vegetation analysis using sampling plots of 0.25 . Soil abiotic factors were simultaneously observed on soil bulk density, organic matter, pH and conductivity, as well as rice field logging water pH and conductivity. The result showed that there was weed community structure dynamics shown by biomass, coverage and species richness, especially it reached a peak in 48 dap and tent to decrease in the generative phase. High coverage of weed species after mowing and water logging decreased black rice growth in vegetative phase. This reduced height growth was slightly recoverable, however spikelet number was reduced until 25 to 70 %. Limnocharis flava, Monochoria vaginalis and Echinocloa crusgalli is beneficial for farmers and supported rice growth.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2013/330/051308381 |
| Subjects: | 500 Natural sciences and mathematics > 570 Biology |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Biologi |
| Depositing User: | Hasbi |
| Date Deposited: | 30 Sep 2013 14:47 |
| Last Modified: | 25 Oct 2021 03:01 |
| URI: | http://repository.ub.ac.id/id/eprint/153591 |
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