Muti, Riezky Amalia Nurfajrina and Prof. Dr. Ir. Kurniatun Hairiah (2023) Laju Dekomposisi Berbagai Kombinasi Seresah Kopi Di Kondisi Lingkungan Yang Bebeda. Sarjana thesis, Universitas Brawijaya.
Abstract
Pengembalian seresah pangkasan pohon kopi dan residu panen biji kopi ke lahan agroforestri kopi dapat memperbaiki kandungan C-organik tanah di lahan agroforestri kopi. Masukan beraneka macam kualitas seresah bermanfaat untuk mempertahankan multifungsi tanah-tanah agroforestri berbasis kopi. Tingkat ketersediaan C-organik tanah yang dihasilkan dipengaruhi oleh kualitas seresah. Penelitian ini bertujuan untuk: (a) mengevaluasi pengaruh perbedaan komposisi seresah kopi terhadap laju dekomposisinya dan (b) menganalisis pengaruh perbedaan kondisi lingkungan dan kerapatan kanopi terhadap laju dekomposisi. Penelitian dilakukan pada bulan Juli hingga September 2022 di lahan milik petani kopi di Desa Tulungrejo, Kecamatan Ngantang, Kabupaten Malang. Perlakuan faktorial diatur menurut Rancangan Acak Kelompok (RAK), dengan sumber keragaman (SK) 1 adalah jenis seresah, yaitu: kulit+ranting kopi (KR), kulit+daun kopi (KD), daun+ranting (DR); dan SK 2 adalah penggunaan lahan: lahan sayuran monokultur (M), agroforestri sederhana (AFS) dan agroforestri multistrata (AFM). Pengamatan setiap perlakuan diulang 5 kali, dengan 5 waktu pengamatan (2, 4, 8, 10 dan 12 minggu setelah aplikasi (MSA)). Hasil penelitian menunjukkan bahwa seresah campuran kulit+ranting kopi (lignin 37%) lebih cepat terdekomposisi (k-value = 0,040, t50 = 17 minggu) dibandingkan dengan campuran kulit+daun kopi (k-value = 0,039; t50 = 18 minggu), dan campuran daun+ranting kopi (k-value = 0,029; t50 = 24 minggu). Selain itu, semua jenis seresah terdekomposisi lebih cepat di lahan dengan kondisi tutupan kanopi terbuka (lahan monokultur sayuran), dengan rata-rata k-value = 0,036 dan t50 = 20 minggu. Kecepatan laju dekomposisi seresah kopi di lokasi pengamatan lebih dipengaruhi oleh faktor eksternal (kondisi lingkungan) yaitu tutupan kanopi (R2= 0,787), C-organik tanah (R2= 0,763), N-total tanah (R2= 0,743) suhu tanah (R2= 0,698) dan berat isi tanah (R2= 0,661). Pengembalian semua bagian tanaman kopi dan campurannya ke dalam tanah penting dilakukan untuk menjaga penyediaan karbon dan hara lainnya yang dibutuhkan oleh tanaman kopi.
English Abstract
Returning coffee tree trimmings and coffee bean harvest residue to coffee agroforestry lands can improve soil organic C content in coffee agroforestry lands. The input of various litter qualities is useful for maintaining the multifunctionality of coffee-based agroforestry soils. The level of soil organic C availability produced is influenced by the quality of the litter. This study aims to: (a) evaluate the effect of differences in coffee litter composition on the rate of decomposition and (b) analyze the effect of differences in environmental conditions and canopy density on the rate of decomposition. The research was conducted from July to September 2022 on land owned by coffee farmers in Tulungrejo Village, Ngantang District, Malang Regency. Factorial treatment was arranged according to the Randomized Block Design (Factorial RBD), with a source of diversity (SK) 1 is the type of litter: coffee bean skin + coffee twigs (KR), coffee bean skin + coffee leaves (KD), coffee leaves + coffee twigs (DR); and SK 2 is land use: monoculture land (LMO), simple agroforestry (AFS) and multistrata agroforestry (AFM). Observation of each treatment was repeated 5 times, with 5 observation times (2, 4, 8, 10 and 12 weeks after application). The results showed that the litter mixture of coffee bean skin + coffee twigs (37% lignin) decomposed faster (k-value = 0,040, t50 = 17 weeks) compared to a mixture of coffee bean skin + coffee leaves (k-value = 0,039; t50 = 18 weeks), and a mixture of coffee leaves + coffee twigs (k-value = 0,029; t50 = 24 weeks). In addition, all types of litter decomposed faster on land with open canopy cover (vegetable monoculture land), with an average k-value = 0,036 and t50 = 20 weeks. The decomposition rate of coffee litter at the observation site was more influenced by external factors (environmental conditions), that is canopy cover (R2= 0,787), C-organic soil (R2= 0,763), N-total soil (R2= 0,743) soil temperature (R2= 0,698) and soil unit weight (R2= 0,661). It is important to return all parts of the coffee tree and its mixture to the soil to maintain the supply of carbon and other nutrients needed by coffee plants
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0523040228 |
| Subjects: | 300 Social sciences > 338 Production > 338.1 Agriculture > 338.16 Production efficiency |
| Divisions: | Fakultas Pertanian > Agroekoteknologi |
| Depositing User: | Nur Cholis |
| Date Deposited: | 08 Aug 2023 02:36 |
| Last Modified: | 08 Aug 2023 02:36 |
| URI: | http://repository.ub.ac.id/id/eprint/202347 |
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Text (DALAM MASA EMBARGO)
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