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Populasi, Biomassa dan Jenis Cacing Tanah pada Lahan Sayuran Organik dan Konvensional di Bedugul ARFITA TRI MAYASARI; ANAK AGUNG ISTRI KESUMADEWI; NI LUH KARTINI
Agrotrop : Journal on Agriculture Science Vol 9 No 1 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

Population, Biomass, and Types of Earthworm on Organic and Conventional Vegetable Land in Bedugul. Earthworm is an important indicator of soil fertility. The type of earthworm closelly associated with soil management system. This research aims to determine the population, biomass, and earthworms type that had been done on organic and conventional vegetable ecosystem in Bedugul from December 2017 until March 2018. The purposive research sites were located in Baturiti Village and Candikuning Village for organic and conventional vegetable systems, respectively. The research area was clustered following Randomized Block Design into three group sites and devided based on organic and conventional system as the first factor. The second factor was soil depth (0-10, 10-20 and 20-30 cm) that nested on cultivation system. Calculation of collected earthworm was done in situ while their morphological identification was done at The Soil Science and Environment Laboratory, Faculty of Agriculture,Udayana University.The results confirmed that earthworm population and biomass were affected by cultivation system but the values were not significantly difference among soil depths. The population and biomass of earthworm found in organic soils were two times higher than those in conventional land. Earthworms population in organic field ranged from 66.67 to 89.33 m-2 and on conventional land ranged from 16.00-45.33 m-2. The weight of earthworm biomass on organic land ranged from 1.00-1.93 g and on conventional land ranged from 0.03-0.06 g. The type of worm acquired on organic soil was Lumbricus terrestris and on conventional land was Pontoscolex corethrurus. We can summary from this research that cultivation systems highly influence the community of earthworm.

Pemanfaatan Biochar sebagai Pembawa Rhizobium terhadap Pembentukan Bintil Akar dan Hasil Tanaman Kedelai (Glycine max L. Merril) NI PUTU NENA LUSIANA; ANAK AGUNG NGURAH GEDE SUWASTIKA; I WAYAN DANA ATMAJA; ANAK AGUNG ISTRI KESUMADEWI
Agrotrop : Journal on Agriculture Science Vol 11 No 2 (2021)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2021.v11.i02.p08

The Utilization of Biochar as a Carrier of Rhizobium for the formation of root nodules and Yield of Soybean (Glycine max L. Merril). This study aims to determine the effect of the type of raw materials and particle size of biochar as a Rhizobium carrier on the formation of nodules in soybean plants. This research was conducted from September to November 2020 at the Experimental Station and Laboratory of Soil and Environmental Sciences, Faculty of Agriculture, Udayana University. The research design used was a randomized block design with nested patterns with 2 factorials and 3 replications. The treatment factors consisted of B1 = bamboo biochar, B2 = albasia wood biochar, B3 = corncob biochar, B4 = young coconut skin biochar, P1 = (0,15-0,50 mm), P2 = (>0,50-1,68 mm), P3 = (>1,68-3,36 mm). The parameters observed included effective nodule, nodule size, total bacterial population, ammonium, nitrate, and plant yield. The result of the analysis showed that the type of biochar raw materials had a very significant effect on the parameters of effective nodules, nodules size, total bacterial population and plant yield, but had no significant effect on soil chemical parameters. The treatment of biochar particle size had a very significant effect on the parameters of effective nodules, total bacterial population, and plant yield, and had a significant effect on the size of nodules, but had no significant effect on soil chemical parameters. The conclusion of this study is that the type of raw material for albasia wood biochar is effective as a Rhizobium carrier, which is indicated by the high number of effective nodules, nodules size and total bacterial population of 0,15-1,68 mm particles.

Dinamika Amonium dan Nitrat Lahan Sawah Latosol pada Budidaya Konvensional Padi Lokal dan Hibrida di Subak Jatiluwih GITA YUNI PERMATASARI; ANAK AGUNG ISTRI KESUMADEWI; ANAK AGUNG NGURAH GEDE SUWASTIKA
Agrotrop : Journal on Agriculture Science Vol 9 No 2 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

Ammonium Dynamics and Latosol Wetland Nitrates in Conventional Cultivation of Local and Hybrid Rice in Jatiluwih Subak. Plants absorb nitrogen in the form of ammonium (NH4+) and nitrate (NO3-). Each sample was analyzed for its ammonium and nitrate levels using macro Kjeldahl method. The results showed that the concentration of ammonium and nitrate in soil of the two rice fields were similar. The ions contents were as following: nitrate (2,67%) and ammonium (2,67%) in local rice, while those in hybrid rice fields were amounted of 1,48% and 4,59% respectivelly. The concentration of ammonium and nitrate on 21 DAC in soil samples remained low and rose at 28 DAC, then decreased at 56 DAC. It means that the times of fertilizing always done by the farmers were not appropriate.The content of ammonium and nitrate in water phase much lower than that in soils for both types of rice plants. The highest concentration of ammonium in local rice fields was 0,093% at the time of tillage and the lowest 0% on 21 DAC, while the highest nitrate concentrations in local rice water was 0,37% at 70 DAC and the lowest was 0% at of 21 DAC. The highest ammonium concentrations in hybrid rice 0,33% at 14 DAC, and the lowest 0% at 42 HST, while the highest nitrate content 0,47% at 42 DAC and the lowest 0% at the time of tillage. The fertilizing times recommended based on the findings of this reaserch is at 10-15 DAC for both rice types and another subsquent fertilization on 60-65 DAC for local rice and 40-45 DAC in hybrid rice.

Identifikasi Potensi dan Pengembangan Sistem Pertanian Organik menuju Bali Pulau Organik Anak Agung Istri Kesumadewi; I Wayan Susila; Gusti Alit Gunadi; Dewa Gede Raka Sarjana; I Wayan Diara; Gusti Ngurah Alit Susanta Wirya
Bali Membangun Bali: Jurnal Bappeda Litbang Vol 1 No 3 (2020): Jurnal Bali Membangun Bali, Volume 1, Nomor 3, Desember 2020
Publisher : Badan Riset dan Inovasi Daerah Provinsi Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51172/jbmb.v1i3.141

Purpose: By adopting an agriculture system that is in harmony with nature through an organic farming system approach, it is expected to produce commodities that are healthy and safe for consumption and have a higher economic value so that the two missions can be achieved in the future. Research methods: Research on identifying the potential and development of organic farming systems towards Bali organic islands had been carried out in all regencies and cities in Bali Province on May - December 2019. The research was conducted through a field survey and the results were agreed through FGD with stakeholders. Findings: Development of organic farming systems potentially carried out in almost all districts in Bali except in Klungkung Regency and Denpasar City. Implications: The innovation result of this research is the online, integrated, compact, lightweight, and easy to operate organic database system for Bali Province.

Hubungan Kadar Bahan Organik Tanah dengan Keanekaragaman Makrofauna Tanah pada Lahan Pertanian di Kecamatan Baturiti STEFANIA DESYANI DERGONG; A.A. ISTRI KESUMADEWI; I WAYAN DANA ATMAJA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.11, No.3, Juli 2022
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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The Relationship between Soil Organic Matter Levels with Diversity of Soil Macrofauna on Agricultural Land in Baturiti District This study aims to determine the level of soil macrofauna diversity on agricultural land in Baturiti District and to determine the relationship between soil organic matter levels and soil macrofauna diversity on agricultural land in Baturiti District. Sampling locations were taken on two types of land use, two organic land cultivation systems at an altitude of 903-1259 meters above sea level and conventional land at an altitude of 925-1173 meters above sea level. The method in this study is the sampling method, taking soil macrofauna and soil organic matter by direct observation to the research location at the sampling point, namely 5 types of organic agricultural plants and 5 types of conventional agricultural plants which are considered representative of the presence of soil macrofauna and represent each type of plant in the study area. Soil macrofauna sampling was carried out using 2 methods, namely pit fall trap, quadratic method and hand sorting. Sampling of organic matter was carried out by hand sorting method, on organic and conventional land in Baturiti District. Soil macrofauna found in organic and conventional land were identified and calculated values: Diversity index (H'), Abundance index (R1), Dominance (C). Soil from organic and conventional land was analyzed for organic matter content (C). The data obtained were analyzed by hypothesis testing (t) using the SPSS application to determine the relationship between soil organic matter content and soil macrofauna. The results of this study indicate that the level of soil macrofauna diversity on organic land with an altitude of 903-1259 mdpl is in the medium category (1.493- 2.421) and the level of soil macrofauna diversity on conventional land with an altitude of 962- 1318 mdpl is in the medium category (1.011- 1,961). On organic land with an altitude of 903- 1259 mdpl and conventional land with an altitude of 962 mdpl and 1173 mdpl, there is no relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it was shown that it was rejected. On conventional land with an altitude of 1318 meters above sea level, there is a relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it shows that it is accepted.

Hubungan Kadar Bahan Organik Tanah dengan Keanekaragaman Makrofaun Tanah pada Lahan Pertanian di Kecamatan Baturiti STEFANIA DESYANI DERGONG; A.A. ISTRI KESUMADEWI; I WAYAN DANA ATMAJA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.11, No.4, Oktober 2022
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar

The Relationship between Soil Organic Matter Levels with Diversity of Soil Macrofauna on Agricultural Land in Baturiti District This study aims to determine the level of soil macrofauna diversity on agricultural land in Baturiti District and to determine the relationship between soil organic matter levels and soil macrofauna diversity on agricultural land in Baturiti District. Sampling locations were taken on two types of land use, two organic land cultivation systems at an altitude of 903-1259 meters above sea level and conventional land at an altitude of 925-1173 meters above sea level. The method in this study is the sampling method, taking soil macrofauna and soil organic matter by direct observation to the research location at the sampling point, namely 5 types of organic agricultural plants and 5 types of conventional agricultural plants which are considered representative of the presence of soil macrofauna and represent each type of plant in the study area. Soil macrofauna sampling was carried out using 2 methods, namely pit fall trap, quadratic method and hand sorting. Sampling of organic matter was carried out by hand sorting method, on organic and conventional land in Baturiti District. Soil macrofauna found in organic and conventional land were identified and calculated values: Diversity index (H'), Abundance index (R1), Dominance (C). Soil from organic and conventional land was analyzed for organic matter content (C). The data obtained were analyzed by hypothesis testing (t) using the SPSS application to determine the relationship between soil organic matter content and soil macrofauna. The results of this study indicate that the level of soil macrofauna diversity on organic land with an altitude of 903-1259 mdpl is in the medium category (1.493- 2.421) and the level of soil macrofauna diversity on conventional land with an altitude of 962- 1318 mdpl is in the medium category (1.011- 1,961). On organic land with an altitude of 903- 1259 mdpl and conventional land with an altitude of 962 mdpl and 1173 mdpl, there is no relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it was shown that it was rejected. On conventional land with an altitude of 1318 meters above sea level, there is a relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it shows that it is accepted.

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