Pratiwi, TiaraAyu (2014) Variasi Spasial Pertumbuhan dan Produktivitas Padi Merah Akibat Pengairan Berbeda di Sawah Organik Desa Sengguruh, Kecamatan Kepanjen Kabupaten Malang. Sarjana thesis, Universitas Brawijaya.
Abstract
Penelitian ini bertujuan untuk mengamati variasi spasial pertumbuhan dan produktivitas padi merah Aek Sibundong organik di tiga area sawah akibat pengairan berbeda dan mengetahui interaksi antara pertumbuhan padi dengan tumbuhan liar serta faktor abiotik sawah selama dua musim tanam di Desa Sengguruh, Kecamatan Kepanjen. Pengamatan dilakukan dengan purposive sampling berdasarkan pada genangan air pada rumpun padi di tiap area sawah. Pertumbuhan padi merah diamati selama empat fase pertumbuhan 20, 48, 82, 102 hst (hari setelah tanam) meliputi tinggi rumpun, biomassa, jumlah anakan dan malai, jumlah serta biomassa gabah. Tumbuhan liar (jenis, % penutupan dan biomassa) diamati secara sampling dengan luas petak 0,25 m2 pada plot pengamatan pertumbuhan padi merah. Faktor abiotik yang diamati meliputi tanah (pH, bahan organik dan berat isi tanah) dan air sawah (ada tidaknya genangan, pH, dan konduktivitas). Data dianalisis menggunakan program SPSS dan PAST. Hasil penelitian menunjukkan pertumbuhan dan produktivitas padi merah di tiga area sawah memiliki variasi spasial. Rumpun padi di dekat saluran irigasi memiliki tinggi, jumlah anakan, dan malai yang tidak berbeda nyata dengan dua area sawah lainnya. Namun, cenderung menghasilkan biomassa vegetatif dan gabah yang 10 kali lebih besar dibandingkan dengan area yang jauh dari saluran irigasi. Genangan air sawah menurunkan persentase penutupan dan kekayaan spesies tumbuhan liar. Kehadiran beberapa tumbuhan liar paska penyiangan tidak mempengaruhi jumlah malai dan gabah yang dihasilkan. Kandungan BOT yang tinggi saat awal pertumbuhan padi menurun ketika panen, sehingga BIT semakin rendah.
English Abstract
This study aimed to observe spatial variation of the organic Aek Sibundong red rice growth and productivity in three different areas of a rice field under different water logging levels, as well as to determine the interaction among rice growth with weeds and rice fields abiotic factors on two planting seasons in the Sengguruh Village, Kepanjen District. Observations were conducted with a purposive sampling based on water logging in each area. Red rice growths were observed in four growth phases: 20, 48, 82, 102 dap (days after planting) includes plant height, biomass, number of tillers and panicles, grain number and biomass. Weeds (taxa richness, % coverage and biomass) were observed using sampling plots of 0.25 m2. Abiotic factors include soil (pH, organic matter and soil bulk density) and rice field water (presence or absence of logging, pH, and conductivity). Data were analyzed using SPSS and PAST software. The result showed there were spatial variations of rice growth in three areas. Rice planted close by irrigation channel has plant height, number of tillers and panicles that not significantly different from those planted in another two areas. However, rice planted close by irrigation channel tend to produces vegetative biomass and grain ten times more than those planted far by irrigation channel. Water logging decreased coverage and taxa richness of weeds. Some weeds after manual weeding had no effect on productivity of panicles and grains. High content of soils organic matter occurred at early vegetative phase and decreased at late reproductive phase, so the lower soils bulk density.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2014/157/051403541 |
| Subjects: | 500 Natural sciences and mathematics > 570 Biology |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Biologi |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 07 Jul 2014 08:51 |
| Last Modified: | 21 Oct 2021 03:25 |
| URI: | http://repository.ub.ac.id/id/eprint/153773 |
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