Hubungan Kelimpahan Total Bakteri dan Respirasi Tanah Akibat Perbedaan Manajemen Sistem Agroforestri Kopi

Sholih, Naylil Aula (2019) Hubungan Kelimpahan Total Bakteri dan Respirasi Tanah Akibat Perbedaan Manajemen Sistem Agroforestri Kopi. Sarjana thesis, Universitas Brawijaya.

Abstract

Hutan memiliki fungsi penting untuk menjaga keseimbangan ekosistem dan iklim. Bahan organik merupakan penentu kemampuan tanah untuk mendukung tanaman dan penentu nilai respirasi tanah karena sebagai sumber energi untuk bakteri penghasil CO2. Respirasi tanah merupakan indikator penting pada suatu ekosistem yang meliputi seluruh aktivitas yang berhubungan dengan proses metabolisme di dalam tanah. Pada hutan pendidikan UB forest pengetahuan tentang respirasi dan total bakteri tanah masih bersifat eksplorasi. Oleh karena itu, perlu adanya pengukuran terhadap respirasi CO2 dengan manajemen budidaya tanaman kopi yang berbeda untuk mengetahui emisi yang dihasilkan dengan tidak mengurangi jasa lingkungan dan menurunkan produksi tanam. Penelitian lapang dilaksanakan pada bulan Januari 2019 sampai dengan bulan Juni 2019 di UB forest dan analisa sampel tanah di Laboratorium Jurusan Tanah. Penelitian tersebut menggunakan Rancangan Acak Kelompok Faktorial (RAKF) dengan 4 plot pengamatan dan 3 zonasi yang diulang sebanyak 3 ulangan. Plot pengamatan yaitu LC (Low Management and Canopy), MC (Medium Management and Canopy), HC (High Management and Canopy) dan BAU (Bussines As Ussual). Pengamatan yang dilakukan meliputi pengukuran biomassa, Luas Bidang Dasar (LBD), masukan seresah, suhu, intensitas cahaya C-organik, pH, tekstur tanah, BI, BJ, kualitas seresah, respirasi tanah serta total bakteri. Data dianalisis menggunakan Analysis of Variance (ANOVA) dan apabila data hasil berbeda nyata, maka analisis dilanjutkan menggunakan uji DMRT taraf 5%. Tahap selanjutnya uji korelasi dan regresi untuk mengetahui hubungan parameter serta besar pengaruh dari parameter. Dari ketiga pengamatan pengambilan sampel respirasi tanah menunjukkan nilai tertinggi pada plot pengamatan HC dan nilai respirasi terendah pada plot BAU. Nilai rata-rata pengamatan pertama plot BAU jarak a = 50 cm dari kopi 388,027 kg C-CO2 ha-1 hari-1 sangat berbeda nyata dengan plot HC jarak a = 50 cm dari kopi 1015,799 kg C-CO2 ha-1 hari-1, pada pengamatan kedua hasil nilai rata-rata respirasi tanah plot BAU jarak b = 50 cm dari pinus dengan nilai 108,584 kg C-CO2 ha-1 hari-1 berbeda nyata dengan plot HC jarak b = 50 cm dari pinus dengan nilai 685,200 kg C-CO2 ha-1 hari-1. Hasil nilai respirasi tanah pada pengamatan ketiga plot BAU jarak c = 100 cm dari kopi dan pinus dengan nilai 196,941 kg C-CO2 ha-1 hari-1 berbeda nyata dengan plot HC jarak c = 100 cm dari kopi dan pinus dengan nilai 327,373 kg C-CO2 ha-1 hari-1. Korelasi antara respirasi dan jumlah bakteri yaitu r tabel = -0,2614 (R2 = 0.024) yang menunjukkan tidak adanya hubungan. Hasil analisis regresi berganda didapatkan y = -2980,290 + 0,1666 X1 + 74,079 X2 + 246,914 X3 – 0,075 X4 – 38,133 X5 – 460,910 X6 + 0,00 X7 dengan nilai R2 = 88,5% yang artinya nilai masukan seresah, suhu tanah, suhu udara, intensitas cahaya, biomassa pohon, bahan organik tanah, pH tanah dan total bakteri dapat meningkatkan nilai respirasi sebesar 88,5% dan 11,5% dipengaruhi oleh variebel yang lain.

English Abstract

Forests have an important function for the conservation of balance and ecosystems. Organic matter is a determinant of the ability of the soil to support plants and a determinant of soil respiration value because it is an energy source for CO2-producing bacteria. Soil respiration is an important indicator of the ecosystem associated with all activities related to the processing process in the soil. In UB's education forest the knowledge about respiration and total soil bacteria is still exploratory. Therefore, it is necessary to measure CO2 respiration with different coffee crop management to obtain the emissions produced by reducing environmental production and reducing crop production. Field research was conducted in January 2019 to June 2019 in UB forest and analysis of soil samples in the Laboratory of the Soil Department. The study used a factorial randomized block design (RBDF) with 4 observation plots and 3 zonations that were repeated in 3 replications. The observation plots are LC (Low Management and Canopy), MC (Medium Management and Canopy), HC (High Management and Canopy) and BAU (Bussines As Ussual). Observations made included measurements of biomass, Baseline Area (LBD), litter input, temperature, C-organic light intensity, pH, soil texture, BI, BJ, litter quality, soil respiration and total bacteria. Data were analyzed using Analysis of Variance (ANOVA) and if the result data were significantly different, the analysis was continued using the DMRT test of 5% level. The next step is correlation and regression tests to find out the relationship between parameters and the effect size of the parameters. Of the three observations of soil respiration sampling showed the highest value on the HC observation plot and the lowest respiration value on the BAU plot. The average value of the first observation of BAU plot distance a = 50 cm from coffee 388,027 kg C-CO2 ha-1 day-1 is very significantly different from the HC plot distance a = 50 cm from coffee 1015,799 kg C-CO2 ha-1 day -1, on the second observation the results of the average value of soil respiration plot BAU distance b = 50 cm from the pine with a value of 108.584 kg C-CO2 ha-1 day-1 significantly different from the HC plot distance b = 50 cm from the pine with a value of 685,200 kg C-CO2 ha-1 day-1. The results of soil respiration values in the three BAU plots observed c = 100 cm distance from coffee and pine with a value of 196,941 kg C-CO2 ha-1 day-1 were significantly different from the HC plot distance c = 100 cm from coffee and pine with a value of 327,373 kg C -CO2 ha-1 day-1. The correlation between respiration and bacterial count is r table = -0.2614 (R2 = 0.024) which shows no relationship. The results of multiple regression analysis obtained y = -2980,290 + 0,1666 X1 + 74,079 X2 + 246,914 X3 - 0,075 X4 - 38,133 X5 - 460,910 X6 + 0,00 X7 with a value of R2 = 88.5%, which means the litter input value, soil temperature, air temperature, light intensity, tree biomass, soil organic matter, soil pH and total bacteria can increase respiration value by 88.5% and 11.5% are influenced by other variebables.

Item Type: Thesis (Sarjana)
Identification Number: SKR/FP/2019/813/051909692
Uncontrolled Keywords: -
Subjects: 600 Technology (Applied sciences) > 631 Specific techniques; apparatus, equipment materials > 631.4 Soil science > 631.47 Soil and land-use surveys
Divisions: Fakultas Pertanian > Agroekoteknologi
Depositing User: soegeng sugeng
Date Deposited: 10 Aug 2020 07:05
Last Modified: 19 May 2022 06:11
URI: http://repository.ub.ac.id/id/eprint/174763
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