scholarly journals KANDUNGAN N DAN P HASIL DEKOMPOSISI SERASAH DAUN MANGROVE PADA SEDIMEN DI MARON MANGROVE EDU PARK, SEMARANG The Content of N and P Results of Decomposition of Litter of Mangrove Leaves in Sediments at Maron Mangrove Edu Park, Semarang

2019 ◽  
Vol 8 (3) ◽  
pp. 226-233
Author(s):  
Hafidha Murti Kanti ◽  
Supriharyono Supriharyono ◽  
Arif Rahman
Keyword(s):  
Leaf Litter ◽  
Total Nitrogen ◽  
Sandy Loam ◽  
Substrate Type ◽  
Observation Station ◽  
Mangrove Species ◽  
Mangrove Ecosystems ◽  
Sediment Types ◽  
Temperature Ranges

ABSTRAK Dekomposisi serasah daun yang disertai pelepasan nutrien merupakan fungsi yang sangat penting di perairan mangrove. Unsur hara yang diperlukan bagi lingkungan dari hasil proses dekomposisi antara lain N (Nitrogen) dan P (Phospor). Maron Mangrove Edupark merupakan salah satu ekosistem mangrove yang terletak di Tugurejo, Kota Semarang. Kawasan ini terdapat tambak dan dekat dengan pantai sehingga berfungsi sebagai pencegah abrasi. Untuk mengetahui peran vegetasi mangrove bagi lingkungan, dilakukan penelitian untuk mengetahui kandungan N dan P hasil dekomposisi serasah daun mangrove pada sedimen. Waktu pelaksanaan penelitian dimulai tanggal 25 Maret 2019 sampai 22 April 2019. Tujuan dari penelitian ini adalah untuk mengetahui mengetahui kerapatan jenis mangrove yang ada, mengetahui kandungan N dan P pada hasil dekomposisi serasah daun mangrove pada sedimen dan hubungannya dengan tipe sedimen di Maron Mangrove Edupark, Semarang. Metode yang digunakan dalam penelitian ini adalah metode eksperimental melalui kontrol, manipulasi perlakuan di lapangan dan obervasi di lapangan. Penentuan stasiun berdasarkan jenis substrat, dan terdapat 4 stasiun penelitian. Hasil dari penelitian ini adalah didapatkan data kerapatan mangrove berkisar 2,72 Ind/m2 sampai 4,20 Ind/m2. Nilai suhu air berkisar 28-30°C, suhu udara berkisar 28-30°C , pH berkisar 6-7, salinitas berkisar 26-29, dan nilai DO berkisar 3,543-5,029. Kandungan nitrogen total berkisar 0,004-0,074% dan phospat berkisar 0,164-1,52%. Tekstur sedimen di stasiun A lempung berpasir, stasiun B lempung liat berpasir, stasiun C dan D substrat liat. Terdapat hubungan korelasi yang tinggi antara tekstur sedimen dengan nitrogen total, dan hubungan korelasi sedang dengan phospat. ABSTRACT Leaf litter decomposition which accompanied with releasing nutrient have an important function in mangrove waters. Nutrients needed for the environment from the results of decomposition, those are N (Nitrogen) and P (Phospor). Maron Mangrove Edupark is one of the mangrove ecosystems located in Tugurejo, Semarang City. This area has a pond and close to the beach so it serve an abrasion deterrent. To determine the role of mangrove vegetation for the environment, a study was conducted to determine the content of N and P resulting from decomposition of mangrove leaf litter in sediments. The study had been carried at from March 25, 2019 to April 22, 2019. The purpose of this study is to determine the density of existing mangrove species, determine the content of N and P in the decomposition of mangrove leaf litter in sediments and their relationship with sediment types at Maron Mangrove Edupark, Semarang. The method is an experimental method through control, manipulation of treatment in the field and observation. Station determination is based on substrate type, and there are 4 stations. The results of this study are the mangrove densities ranging from 2.72 Ind / m2 to 4.20 Ind / m2. The temperature of the water ranges from 28-30°C, the air temperature ranges from 28-30°C, pH ranged from 6-7, salinity ranged from 26-29, and DO values ranged from 3.543-5.029. The total nitrogen content ranges from 0.004-0.074% and phosphate ranges from 0.164 to 1.52%. Sediment texture in station A is a sandy loam, station B is a sandy clay loam, station C and D is a clay. There is a high correlation between the texture of sediment and total nitrogen, and a moderate correlation with phosphate.

Ecological role of grapsid crabs in mangrove ecosystems: a review

1998 ◽  
Vol 49 (4) ◽  
pp. 335 ◽  
Author(s):  
S. Y. Lee
Keyword(s):  
Organic Matter ◽  
Structure And Function ◽  
Mangrove Species ◽  
Organic Matter Production ◽  
Mangrove Ecosystems ◽  
Matter Production ◽  
Feeding Activities ◽  
And Function ◽  
Growth And Reproduction

Recent research on Indo–Pacific mangroves has confirmed the significant role played by grapsid crabs in the structure and function of these ecosystems. Through the feeding activities of the crabs, large proportions of organic matter production, i.e. mangrove leaves, are recycled within the forest. This initial retention of production in the forest refines earlier estimates of tidal export from the mangroves. Crab-processed organic matter could also form the basis of a coprophagous food chain involving small invertebrates, or be re-exported as micro-particulates. Differential consumption by crabs of mangrove propagules also affects mangrove community structure by diminishing the relative abundance of species whose propagules are preferred foods. Bioturbation by the crabs also results in changes in surface topography, particle size distribution and degree of aeration and, thus, the concentration of phytotoxins in the substratum. Such changes could affect growth and production of the mangroves. Growth and reproduction of the crabs may in turn be influenced by the associated mangrove species, mainly through the provision of food. The semi-terrestrial and air-breathing habit of the grapsid crabs probably makes them tolerant of deoxygenation caused by organic enrichment, but development of the landward mangroves will strongly affect survival of the crabs.

scholarly journals SUSTAINABILITY ANALYSIS OF MANGROVE ECOSYSTEMSIN SUNGAI BELA VILLAGE, INDRAGIRI HILIR REGENCY

2019 ◽  
Vol 46 (3) ◽  
pp. 46
Author(s):  
Mohd Riza Fahlifi ◽  
Deni Efizon ◽  
Adriman Adriman
Keyword(s):  
Social Economic ◽  
Mangrove Ecosystem ◽  
Cultural Dimensions ◽  
Survey Method ◽  
Mangrove Species ◽  
Dimensional Scaling ◽  
Mangrove Ecosystems ◽  
Index Value ◽  
Ecological Dimension

This study aims to determine the level of sustainability of mangrove ecosystems in Sungai Bela Village. The method used in this study is a survey method with data analysis using the Multi Dimensional Scaling (MDS). The results showed that the index value of the sustainability of mangrove ecosystems showed an ecological dimension(61.42) with RMS (2.28), social, economic and cultural dimensions (50.91) with RMS (2.51), legal and institutional dimensions (61.91) with RMS (1.79).Several factors that affect the sustainability of mangrove ecosystems such as:(1) mangrove species diversity;(2) density of mangrove ecosystems;(3) content of sediment organic matter;(4) marketing of fishery products;(5) mangrove dependence on livelihoods;(6) level of community knowledge;(7) the role of community leaders;(8) level of community compliance and (9) community participation.It can be concluded that the mangrove ecosystem in Sungai Bela Village with a sufficiently continuous status.

scholarly journals Effect of Differentiated Nitrogen Fertilization on the Enzymatic Activity of the Soil for Sweet Potato (Ipomoea batatas L. [Lam.]) Cultivation

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1970
Author(s):  
Barbara Sawicka ◽  
Barbara Krochmal-Marczak ◽  
Piotr Pszczółkowski ◽  
Elżbieta Jolanta Bielińska ◽  
Anna Wójcikowska-Kapusta ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Total Nitrogen ◽  
Nitrogen Fertilization ◽  
Ipomoea Batatas ◽  
Polynomial Regression ◽  
Sandy Loam ◽  
C:N Ratio ◽  
Soil Reaction ◽  
Research Station ◽  
Fourth Degree

The experiment was conducted between 2015–2017 in the Research Station for Cultivar Testing in Uhnin (51°34′ N, 23°02′ E), in Luvisols developed from sandy loam soils. Soil samples for the tests of enzymatic activity were collected after the crop was harvested. The measurements included: the content of dehydrogenases, phosphatases, urease and protease, as well as total organic carbon, total nitrogen and mineral nitrogen in soil, based on standard methods. The research results point to changes in the enzymatic activity of light soil under the influence of varied nitrogen fertilization. In objects fertilized with this ingredient, the activity of the analysed enzymes was significantly higher than in the control soil, except for combinations fertilised with 150 kg ha−1 N characterised by the highest accumulation of N-NO3− in soil. The activity of dehydrogenases, phosphatases and urease changed as the nitrogen dose increased. The polynomial regression analysis enabled a better understanding of those dependences. In the case of dehydrogenases, phosphatases and urease, a third-degree curvilinear relation of enzymatic activity to nitrogen fertilisation was observed (a fourth-degree relation was found, with a coefficient R2 in those equations amounting to =0.958, 0.977, 0.979, respectively) and in the case of protease activity, a fourth-degree relation, with coefficient R2 = 0.989. However, soil acidity did not have a significant influence on either the enzymatic activity or physico-chemical characteristics of soil under the cultivation of sweet potatoes. The C:N ratio turned out to be significantly negatively related to the content of the enzymes dehydrogenase (Adh), phosphatase (AF), urease (AU) and protease (AP) as well as the content of total nitrogen, especially its ammonium form (N-NH4). The obtained results indicate the usefulness of research on enzymatic activity as an indicator of soil reaction to nitrogen fertilization and will enable maintenance of the optimal biological balance of cultivated soils.

scholarly journals The CasKR Two-Component System Is Required for the Growth of Mesophilic and Psychrotolerant Bacillus cereus Strains at Low Temperatures

2014 ◽  
Vol 80 (8) ◽  
pp. 2493-2503 ◽  
Author(s):  
Sara Esther Diomandé ◽  
Stéphanie Chamot ◽  
Vera Antolinos ◽  
Florian Vasai ◽  
Marie-Hélène Guinebretière ◽  
...  
Keyword(s):  
Bacillus Cereus ◽  
Food Poisoning ◽  
Two Component System ◽  
Diverse Range ◽  
Component System ◽  
Content Type ◽  
Two Component ◽  
Temperature Ranges ◽  
Different Strains

ABSTRACTThe different strains ofBacillus cereuscan grow at temperatures covering a very diverse range. SomeB. cereusstrains can grow in chilled food and consequently cause food poisoning. We have identified a new sensor/regulator mechanism involved in low-temperatureB. cereusgrowth. Construction of a mutant of this two-component system enabled us to show that this system, called CasKR, is required for growth at the minimal temperature (Tmin). CasKR was also involved in optimal cold growth aboveTminand in cell survival belowTmin. Microscopic observation showed that CasKR plays a key role in cell shape during cold growth. Introducing thecasKRgenes in a ΔcasKRmutant restored its ability to grow atTmin. Although it was first identified in the ATCC 14579 model strain, this mechanism has been conserved in most strains of theB. cereusgroup. We show that the role of CasKR in cold growth is similar in otherB. cereus sensu latostrains with different growth temperature ranges, including psychrotolerant strains.

scholarly journals The Role of Indigenous Mycorrhiza in Combination with Cattle Manure in Improving Maize Yield (Zea Mays L) on Sandy Loam of Northern Lombok, Eastern of Indonesia

2013 ◽  
Vol 18 (1) ◽  
pp. 53 ◽  
Author(s):  
Wahyu Astiko ◽  
Ika Rochdjatun Sastrahidayat ◽  
Syamsuddin Djauhari ◽  
Anton Muhibuddin
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Sandy Loam ◽  
Maize Yield ◽  
Cattle Manure ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Inorganic Fertilizers ◽  
Organic C

A glass house study was conducted to evaluate the contribution of indigenous arbuscular mycorrhiza fungi (AMF) in improving maize yield grown on sandy loam of Northern Lombok. The package of organic fertilizers treatments were tested including: without inoculation of mycorrhiza, inoculation mycorrhiza and no added inorganic fertilizers, inoculation of mycorrhiza with cattle manure added, inoculation of mycorrhiza with rock phosphate added and inoculation mycorrhiza with inorganic fertilizers. The treatments were arranged using a Completely Randomized Design with four replications. The results of the study show that the inoculation of AMF significantly increased soil concentration of N, available-P, K and organic-C by 37.39%, 60.79%, 66.66% and 110.15% respectively observed at 60 days after sowing (DAS). The similar trend was also found at 100 DAS, where those nutrients increased by 21.48%, 69%, 43.93% and 37.07%, respectively compared to control. The improving of soil fertility status was also reflected by nutrients uptake (i.e. N, P, K, Ca) as well as growth and yield of maize. N, P, K and Ca uptake increased by 1,608%, 1,121%, 533% and 534%, respectively. Roots and top dry biomass at 60 DAS increased by 718.40% and 337.67%, respectively. The trend increased of the biomass was followed by observation at 100 DAS. Yield components including cobs, grain and weight of 100 grains increased by 313.60%, 411.84% and 137.54%, respectively. In addition, the inoculation of AM with F2 contributed significantly to the spore numbers and root infection.[How to Cite : Astiko W, IR Sastrahidayat, S Djauhari, and A Muhibuddin. 2013. The Role of Indigenous Mycorrhiza in Combination with Cattle Manure in Improving Maize Yield (Zea Mays L) on Sandy Loam of Northern Lombok, Eastern of Indonesia. J Trop Soils, 18 (1): 53-58. doi: 10.5400/jts.2013.18.1.53][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.1.53]

scholarly journals Distribusi Scylla spp. di perairan estuari Sungai Donan Segara Anakan Bagian Timur, Cilacap

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Sulistiono Sulistiono ◽  
Nurul Musyariafah Yahya ◽  
Etty Riani
Keyword(s):  
Economic Value ◽  
Scylla Serrata ◽  
Mangrove Forests ◽  
Mud Crab ◽  
Mangrove Species ◽  
Central Java ◽  
Rhizophora Apiculata ◽  
Mangrove Ecosystems ◽  
Avicennia Alba ◽  
Mangrove Crabs

Mangrove forests are ecosystems that make up coastal areas and river estuaries. The examples of mangrove ecosystems found in Indonesia are in Segara Anakan, Central Java. One of the aquatic biota with the economic value found in the mangrove forest ecosystem is the mud crab (Scylla spp.). The purpose of this study was to assess the distribution of mangrove crabs (Scylla spp.) to the presence of mangrove species in the mouth of the Donan River, Segara Anakan. A sampling of crabs and observations of mangrove vegetation were carried out at five stations spread from the river to the sea. The results showed that there were three types of mangrove crabs caught in the vicinity of the study, namely Scylla tranquebarica, S. olivacea, and S. serrata. The types of mangroves found include Rhizophora apiculata, R. mucronata, Avicennia rumphiana, A. alba, A. officinalis, and Nypa. Regression analysis showed that mangrove density correlated with the abundance of Scylla tranquebarica and Scylla olivacea, but contradicts the abundance of Scylla serrate. PCA analysis showed that the Crab species Scylla tranquebarica and Scylla olivacea were associated with mangroves of Avicennia alba, Avicennia rumphiana, and Rhizophora apiculata. Meanwhile, Scylla serrata crabs are associated with Avicennia officinalis.

scholarly journals POTENSI KESESUAIAN MANGROVE SEBAGAI DAERAH EKOWISATA DI DUSUN TANJUNG TEDUNG SUNGAI SELAN BANGKA TENGAH

2018 ◽  
Vol 12 (1) ◽  
pp. 65-73
Author(s):  
Susi Susi ◽  
Wahyu Adi ◽  
Suci Puspita Sari
Keyword(s):  
Data Analysis ◽  
Coastal Area ◽  
Research Method ◽  
Research Area ◽  
Conformity Index ◽  
Mangrove Species ◽  
Compatibility Index ◽  
Mangrove Area ◽  
Mangrove Ecosystems ◽  
Index Matrix

Tanjung Tedung Coastal Coast is located in Tanjung Pura Village, Sungai Selan Subdistrict, Bangka Tengah. Regency which has the potential to be developed into a mangrove ecowista area, because almost along the coastal area is overgrown with ecosystem mengrove. This study aims to identify the potential of mangrove ecosystems and calculate the Tourist Compatibility Index (IKW) potential of mangrove area as ecotourism area of mangrove. The data were collected from March to April 2018 in Tanjung Tedung Coastal Coast. The research method used is Purposive Sampling. Research area taken as many as 3 stations. The data analysis is based on tourism conformity index matrix (IKW). Data of mangrove tourism conformity parameter consisting of: mangrove thickness, mangrove density, mangrove species, tidal and biota object. The result of measurement of mangrove tourism match parameters are thickness at station I worth 303,57 m, station II worth 366,57 m and station III worth 1,061,44 m. Density of station I with value 0.11 ind / m². Station II worth 0.10 ind / m² and station III with value 0.16 ind / m². Found 9 Species of mangroves and other biota such as: fish, shrimp, crab, molluscs, reptiles, birds and other biota. The result of conformity analysis to be used as ecotourism area with IKW value of station I worth 78.95% with Appropriate category. Furthermore at station II IKW value is 78.95% with Appropriate category. and station III got the value of IKW worth 96.05% with category Very

scholarly journals Effect of Sulfur and Clean Salt on Antioxidant Enzymes and Proline Content in Improving Salt Tolerance of Two Lettuce Cultivars Grown in Basrah

2019 ◽  
Vol 32 ◽  
pp. 80-89
Author(s):  
Jameel H. Hiji ◽  
Abbas M. Jasim ◽  
Awatif N. Jerry
Keyword(s):  
Electrical Conductivity ◽  
Antioxidant Enzymes ◽  
Salt Tolerance ◽  
Adverse Effects ◽  
Irrigation Water ◽  
Sandy Loam ◽  
Proline Content ◽  
Salt Tolerant ◽  
Loam Soil

The experiment was conducted during 2017-2018 and 2018-2019 winter seasons at Abu Al-Khaseeb District at basrah /Iraq on sandy loam soil  to study the effect of sulfur at five concentration ( 0 , 500 , 1000, 1500 and 2000) kg. Ha-1, clean salt at three concentration (0, 0.5 and 1.0) ml. L-1, two cultivars of lettuce local and fajr and interaction among them  at electrical conductivity of the irrigation water (7.85 and 9.69) dS.m-1.  Result showed significant reduction in the activity of catalase (CAT) and peroxidase (POD) enzymes and proline content in all treatments of sulfur and clean salt especially at 2000 Kg. Ha-1 sulfur and clean salt at 1.0 ml L-1had significantly decrease in CAT activity (295.80 ? 341.65) U mg–1 FW, POD activity (7.86? 8.98) U mg–1 FW and proline (0.50 ? 0.80) mg g-1DW, comparing with control of CAT activity (663.21, 814.65) U mg–1 FW and POD activity (13.83, 15.52) mg–1 FW and proline (1.19, 2.03) mg g-1DW, respectively for two seasons due to the role of sulfur and clean salt ameliorates the adverse effects of salinity on plants. Fajr lettuce is more salt-tolerant than local due to less antioxidant enzyme levels POD, CAT and proline.

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