Fajrina, Nurullita and Cahyo Prayogo,, SP., MP., Ph.D and Novi Arfarita,, SP., MP., M.Sc., Ph.D (2021) Total Bakteri Penambat Nitrogen Dan Bakteri Pelarut Fosfat Di Berbagai Manajemen Agroforestri Kopi-Pinus Di Ub Forest. Sarjana thesis, Universitas Brawijaya.
Abstract
Agroforestri merupakan sistem pertanian yang berbasis hutan. Agroforestri mengkombinasikan antara tanaman semusim dengan tanaman tahunan. Agroforestri kopi-pinus berarti mengkombinasikan tanaman kopi dan pinus dalam suatu lahan. Tanaman kopi memerlukan tanaman penaung agar dapat tumbuh optimal. Pinus menjadi salah satu tanaman penaung kopi yang sering digunakan di daerah dataran tinggi. Manajemen agroforestri yang baik, diharapkan mampu meningkatkan produktivitas lahan secara berkelanjutan. Pengelolaan lahan berkelanjutan dicirikan dengan sejauh mana aspek konservasi tanah diperhatikan. Jika aspek konservasi diperhatikan, maka kesuburan tanah akan terjaga. Tanah yang subur akan mampu menyediakan hara bagi tanaman. Unsur hara yang tersedia dapat diperoleh dari perombakan bahan organik oleh mikroorganisme di dalam tanah. Unsur hara seperti nitrogen (N) dan fosfor (P) merupakan unsur hara makro yang paling banyak dibutuhkan oleh tanaman. Unsur hara N dalam tanah dapat dihasilkan oleh Bakteri Penambat Nitrogen (BPN), sedangkan unsur hara P dalam tanah dapat dihasilkan oleh Bakteri Pelarut Fosfat (BPF). Tujuan penelitian dilakukan untuk mengetahui pengaruh karakteristik lahan di berbagai manajemen agroforestri terhadap total BPN dan total BPF. Penelitian dilaksanakan pada bulan Juli 2019 hingga bulan Februari 2020 di UB Forest dan analisis sampel tanah dilakukan di Laboratorium Mikrobiologi Universitas Islam Malang. Rancangan penelitian yang digunakan adalah Rancangan Acak Kelompok Faktorial (RAKF) 4x3x3 dengan 4 plot pengamatan, 3 zonasi dan 3 ulangan. Empat plot yang digunakan yaitu Base As Usual (BAU), Low density of coffee dan Low management coffee (LC), High density of coffee dan Low management coffee (MC) danHigh density of coffee dan High management coffee (HC). Pengamatan yang dilakukan berupa pengukuran biomassa, Luas Bidang Dasar (LBD), suhu tanah, suhu udara, intensitas cahaya matahari, pH tanah, C- organik, bahan organik, N total, total bakteri, total BPN dan total BPF. Data dianalisis dengan sidik ragam (ANOVA) dan apabila berbeda nyata, maka analisis dilanjutkan dengan menggunakan uji DMRT dengan taraf 5% serta dilakukan uji korelasi dan regresi untuk mengetahui hubungan variabel serta besar pengaruhnya. Hasil penelitian menunjukkan bahwa total BPN dan BPF tertinggi berasal dari plot BAU yaitu sebanyak 23,22x104 CFU.ml-1 dan 24,22x104 CFU.ml-1. Karakteristik lahan dari berbagai manajemen agroforestri tidak berbeda signifikan terutama pada suhu tanah, intensitas cahaya matahari dan pH tanah. Variabel bebas berupa seresah, N total, suhu udara, kerapatan tajuk, total bakteri, C-organik dan bahan organik mampu mempengaruhi total bakteri penambat N sebesar 85,9%. Sedangkan variabel bebas tersebut mampu memberikan pengaruh terhadap total bakteri pelarut P sebesar 66,5%.
English Abstract
Agroforestry is a forest-based farming systems. Agroforestry combines growing seasons with annual plant. The agroforestry of coffee-pine means combining coffee and pine together into a field. Coffee plants need more shade plants in order to grow optimal. The pines become one of the most widely used coffee shade plants in the highlands. Good agroforestry management, it is hoped to increase land productivity continuously. Suistanable land management is characterized by the extent to which soil conservation aspects are concerned. Fertile soil will be able to provide nutrients for the plants. The available nutrients could be obtained from repairing the organic material of microorganism in the soil. Nutrients such as nitrogen (N) and phosporous (P) are the macronutrients it takes the most of the plants. Nitrogen (N) in the soil can be produced by N-fixing Bacteria and phosporous (P) can be produced by P-solubilizing bacteria. The purpose of the research was to know the impact of the land characteristic at various agroforestry management on total colony of N-fixing Bacteria and P-solubilizing bacteria. Research is carried out from July 2019 to February 2020 in UB Forest and analysis of soil samples at microbiology laboratory of Universitas Islam Malang. The research used a Factorial Randomized Block Design (FRBD) 4x3x3 with 4 observation plots, 3 zonation that were repeated in 3 replications. The observation plots are Base As Usual (BAU), Low density of coffee dan Low management coffee (LC), High density of coffee dan Low management coffee (MC) dan High density of coffee dan High management coffee (HC). The observation included measurements of boimass, basal area (LBA), soil temperature, air temperature, light intensity, soil pH, organic carbon, organic matter, total colony of bacteria, total colony of N-fixing bacteria and total colony of P-solubilizing bacteria. The data were analyzed by ANOVA and if the the result were significantly different, the analysis was continued by using DMRT test of 5% level. The next analysis was correlation and regression tests to find out the relationship between the variable and the effects. Research has shown that the highest total colony of N-fixing bacteria on the BAU plot was equal to 23,22x104 CFU.ml-1 and the highest total colony of P- solubilizing bacteria on the BAU plot was equal to 24,22x104 CFU.ml-1. Independent variables such as litter, total nitrogen, air temperature, canopy cover, total bacteria, C-organic and organic matter are capable to affecting total colony of N-fixing bacteria about 85,9% and also affecting total colony of P-solubilizing bacteria about 66,5%
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0521040259 |
| Subjects: | 600 Technology (Applied sciences) > 631 Specific techniques; apparatus, equipment materials > 631.4 Soil science |
| Divisions: | Fakultas Pertanian > Ilmu Tanah |
| Depositing User: | Nur Cholis |
| Date Deposited: | 28 Jul 2022 02:21 |
| Last Modified: | 27 Sep 2024 01:57 |
| URI: | http://repository.ub.ac.id/id/eprint/192827 |
![[thumbnail of Nurullita Fajrina.pdf]](http://repository.ub.ac.id/style/images/fileicons/text.png) |
Text
Nurullita Fajrina.pdf Download (2MB) |
Actions (login required)
 |
View Item |