Arifanty, Revina Devi and Dr.Ir. Mochtar Lutfi Rayes, M.Sc (2024) Aplikasi Bahan Organik Dan Kapur Pada Lubang Resapan Biopori Terhadap Bakteri Pelarut Fosfat, Ketersediaan Fosfor, Dan Produktivitas Kopi. Sarjana thesis, Universitas Brawijaya.
Abstract
UB Forest merupakan salah satu kawasan penghasil kopi yang terletak di Kecamatan Karangploso. Produktivitas kopi di UB Forest pada tahun 2022 masih tergolong rendah yaitu sekitar 100-400 kg/ha/tahun jika dibandingkan dengan tahun 2017 dan 2018 yang bisa mencapai 600 kg/ha, bahkan banyak tanaman kopi yang tidak berproduksi. Produktivitas tanaman kopi dipengaruhi oleh sifat fisika, kimia, dan biologi tanah. Kandungan unsur hara P di lokasi penelitian tergolong sedang menuju rendah, dengan pH tanah yang agak masam. Ketersediaan unsur hara P dipengaruhi oleh aktivitas bakteri pelarut fosfat dan kondisi kemasaman tanah. Upaya penambahan bahan organik seperti pupuk kandang, kompos, dan penambahan kapur yang dipadukan dengan penggunaan teknologi inovatif berupa lubang resapan biopori dapat menjadi solusi untuk meningkatkan populasi bakteri pelarut fosfat, meningkatkan ketersediaan unsur hara P tanah, serta meningkatkan produktivitas kopi. Tujuan dari penelitian ini untuk menganalisis pengaruh dari penambahan pupuk kandang, kompos, dan kapur melalui aplikasi lubang resapan biopori (LRB) terhadap populasi bakteri pelarut fosfat, kandungan unsur P tanah, dan produktivitas tanaman kopi di kebun kopi UB Forest, Kecamatan Karangploso. Penelitian ini dilaksanakan pada bulan September 2023 hingga bulan April 2024 di kebun kopi UB Forest, Kecamatan Karangploso. Metode yang digunakan dalam penelitian ini yaitu rancangan acak kelompok (RAK) dengan 7 perlakuan dan 4 ulangan. Perlakuan yang diaplikasikan pada lokasi penelitian Kontrol (A0), LRB Kosong (A1), LRB + Kapur Pertanian 1,5 ton/ha (A2), LRB + Pupuk Kompos 20 ton/ha (A3), LRB + Pupuk Kandang 20 ton/ha (A4), LRB + Pupuk Kompos 20 ton/ha + Kapur Pertanian 1,5 ton/ha (A5), LRB + Pupuk Kandang 20 ton/ha + Kapur Pertanian 1,5 ton/ha (A6). Pengaplikasian lubang resapan biopori (LRB) dilakukan dengan jarak 80 cm dari tanaman kopi dengan kedalaman 40 cm. Setiap tanaman kopi terdapat 4 LRB. Parameter yang diamati meliputi pH, P-total, P tersedia, C-organik, populasi bakteri pelarut fosfat, produktivitas kopi. Pengamatan dilakukan pada 1 dan 5 bulan setelah aplikasi (BSA). Analisis data dilakukan dengan uji ANOVA taraf 5%, uji lanjut DMRT 5%, uji korelasi, dan uji regresi. Hasil penelitian menunjukkan bahwa aplikasi LRB dengan penambahan pupuk kandang, kompos dan kapur pertanian memberikan pengaruh yang nyata terhadap peningkatan populasi bakteri pelarut fosfat, kandungan P-tersedia, dan P total tanah pada 1 dan 5 BSA di kedalaman 0-30 cm dan 30-60 cm. Perlakuan aplikasi LRB dengan penambahan pupuk kandang dan kapur pertanian (A6) merupakan perlakuan yang memberikan pengaruh terbaik terhadap populasi bakteri pelarut fosfat, kandungan P-tersedia, dan P-total tanah. Hasil uji korelasi taraf 5% dan 1% menunjukkan bahwa variabel populasi bakteri pelarut fosfat, P-tersedia, dan P-total tanah berkorelasi positif terhadap produktivitas kopi. Berdasarkan uji regresi linear berganda didapatkan nilai signifikansi F sebesar 0,000246 dan koefisien determinasi (R2) sebesar 0,678.
English Abstract
UB Forest is a coffee producing area located in Karangploso District. Coffee productivity in UB Forest in 2022 remains relatively low, ranging between 100-400 kg/ha/year when compared to 2017 and 2018 which could reach 600 kg/ha, and many coffee plants are not producing. Coffee plant productivity is influenced by the physical, chemical and biological properties of the soil. The phosphorus (P) nutrient content in the research location is classified as moderate to low, with a slightly acidic soil pH. The availability of phosphorus is influenced by the activity of phosphate-solubilizing bacteria and soil acidity conditions. Efforts to add organic materials such as manure, compost and lime combined with innovative technology such as biopore infiltration holes could provide a solution to increase the population of phosphate-solubilizing bacteria, increase phosphorus availability in the soil, and enhance coffee productivity. The aim of this research is to analyze the impact of adding manure, compost, and lime through the application of biopore infiltration holes (LRB) on the population of phosphate solubilizing bacteria, soil phosphorus and coffee plant productivity in the UB Forest, Karangploso District. This research was carried out from September 2023 to April 2024 at the UB Forest, Karangploso District. The method used in this research was a randomized block design (RBD) with 7 treatments and 4 replications. Treatments applied at the research site were Control (A0), Empty LRB (A1), LRB + Agricultural Lime 1.5 tons/ha (A2), LRB + Compost 20 tons/ha (A3), LRB + Manure 20 tons/ha ha (A4), LRB + Compost 20 tons/ha + Agricultural Lime 1.5 tons/ha (A5), LRB + Manure 20 tons/ha + Agricultural Lime 1.5 tons/ha (A6). The application of biopore infiltration holes (LRB) is carried out at a distance of 80 cm from the coffee plants with a depth of 40 cm. Each coffee plant had 4 LRBs. Observed parameters included pH, available-P, total-P, Soil Organic Carbon, population of phosphate solubilizing bacteria, and coffee productivity. Observations were made at 1 and 5 months after application. Data analysis was carried out using the 5% ANOVA test, 5% DMRT post hoc test, correlation test and regression test. The research results indicate that the application of biopore infiltration holes combined with manure and agricultural lime (A6) has a significant effect on the enhancement of phosphate-solubilizing bacteria populations, available-P, total-P in the soil at both 1 and 5 months after application at depths of 0-30 cm and 30-60 cm. The treatment with LRB the addition of manure and agricultural lime (A6) was found to be the most effective in improving the populations of phosphate solubilizing bacteria, available-P, and total-P in the soil. The results of correlation tests at the 5% and 1% levels demonstrated a positive correlation between the populations of phosphate-solubilizing bacteria, available-P, total-P and coffee productivity. Multiple linear regression analysis yielded a significance F value of 0,000246 and a coefficient of determination (R²) of 0,678.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 052404 |
| Divisions: | Fakultas Pertanian > Ilmu Tanah |
| Depositing User: | Unnamed user with username nova |
| Date Deposited: | 06 Jan 2025 02:10 |
| Last Modified: | 06 Jan 2025 02:10 |
| URI: | http://repository.ub.ac.id/id/eprint/230995 |
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