scholarly journals SOIL PROPERTIES ASSOCIATED WITH THE INVASIVE NYPA FRUTICANS WURMB AND NATIVE MANGROVE PLANTS IN IBENO, AKWA IBOM STATE, NIGERIA

2021 ◽  
Vol 07 (04) ◽  
pp. 598-613
Author(s):  
Akpan ◽  
Utibe Emmanuel ◽  
Obafemi ◽  
Andrew Adesola ◽  
Tanee ◽  
...  
Keyword(s):  
Soil Properties ◽  
Mangrove Plants ◽  
Nypa Fruticans

scholarly journals Determination of Soil-Related Factors Controlling Initial Nipa (Nypa fruticans Wurmb.) Growth in an Abandoned Shrimp Pond

2016 ◽  
Vol 6 (1) ◽  
pp. 125 ◽  
Author(s):  
Naohiro Matsui ◽  
Fumio Takahashi
Keyword(s):  
Soil Properties ◽  
Principal Component ◽  
Ground Level ◽  
Soil Conditions ◽  
Height Variation ◽  
Related Factors ◽  
Shrimp Pond ◽  
Nypa Fruticans ◽  
Practical Strategy ◽  
Variation Explained

<p class="1Body">In an abandoned shrimp pond, the spatial variability of the height of nipa (<em>Nypa fruticans</em> Wurmb.) plants 5 years after their planting was evaluated to elucidate the determining factors for height. Soil properties were evaluated in 20 points in an area of 0.48 ha. Physical (e.g., hardness, water content) and chemical (e.g., pH and EC) properties were determined using surface soil samples collected at each point. Nipa height was moderately variable, showing a CV value of 31.2%. Soil conditions were considered to affect nipa height; therefore, principal component analysis (PCA) was conducted to elucidate the relationships among soil properties. As a result, three factors were extracted. PC1 correlated positively with relative ground level and Eh, and negatively with moisture. Because these properties were closely related to topography, PC1 was referred to as the topography factor. PC3 showed the second important contribution, a high K content contributed to a large nipa height. Multivariate analysis was also performed to examine the spatial property of nipa height (H), and as a result, the following equation was obtained: H = 423.94 - 0.39 x PC1 - 0.57 x PC3 (r<sup>2</sup>=0.53). Results of this study indicate that 53% of nipa height variation was explained by soil properties, which is larger than the nipa height variation explained solely by topography (23%). Site-specific management to regulate soil properties could be a practical strategy for nipa plantation.</p>

scholarly journals Nipa (Nypa fruticans Wurmb) Sap Collection in Southern Thailand II. Biomass and Soil Properties

2014 ◽  
Vol 4 (4) ◽  
Author(s):  
Naohiro Matsui ◽  
Yasuyuki Okimori ◽  
Fumio Takahashi ◽  
Koji Matsumura ◽  
Noparat Bamroongrugsa
Keyword(s):  
Soil Properties ◽  
Nypa Fruticans ◽  
Southern Thailand

scholarly journals Effect of Nypa fruticans pruning regime and soil properties on regeneration of Mangrove species (Rhizophora racemosa) in Eastern Obolo, Akwa Ibom State

2020 ◽  
pp. 82-91
Keyword(s):  
Soil Properties ◽  
Plant Height ◽  
Growth Parameters ◽  
Management Practice ◽  
Block Design ◽  
Mangrove Species ◽  
Area Index ◽  
Nypa Fruticans ◽  
Pattern Of Variation ◽  
Pruning Regime

The study was conducted to evaluate the effect of Nypa fruticans pruning regimes on the regeneration of mangrove (Rhizophora racemosa) at Okorombokho in Eastern Obolo, Akwa Ibom State, Nigeria. The Nypa was pruned at a uniform height of 10 cm and the area protected with used fishing nets against infiltration by Nypa seeds in tidal floods. Mangrove plants of similar height were interplanted among pre-existing stands, out of which ten plants were tagged in each sub-plot for the measurement of plant height, leaf area index, and stem girth. Three pruning regimes (0, 4, and 6 weekly pruning (WPR) were adopted and soil samples were collected from 0-15 and 15-30 cm depths. The study was a 3x2 factorial in randomized complete block design with three replications. Soil properties showed consistent differences with depth than with pruning regimes. Bulk density (BD) was statistically similar, averaging 1.04 and 1.06 Mgm-3 in 0-15 and 15-30 cm, respectively, while saturated hydraulic conductivity (Ksat), respectively averaged 0.64 and 0.27 cm h-1 . Electrical conductivity (EC), available phosphorous (Av.P) and base saturation (BS) were significantly (p≤0.05) greater in 4WPR (5.77 dS m-1 ; 30.07 mg g-1 ; 85.4%) than 6WPR (4.54 dS m-1 ; 25.82 mg g1 ; 76.2%) and 0WPR (3.57 dS m-1 ; 23.02 mg g-1 ; 74.3%). Plant height (PH) of mangrove averaged throughout the study was significantly (p≤0.05) greater in 4WPR (80.3 cm) than 0WPR (62.5 cm) but similar to 6WPR (73.4 cm). Stem girth (SG) of mangrove was similar but in the order 4WPR (1.06 cm)>6WPR (0.98 cm)>0WPR(0.86 cm). The pattern of variation in other mangrove growth parameters was similar to plant height and stem girth. The study also showed that PH and SG were negatively correlated with sand, Av.P, and EA but positively correlated with silt and clay, EC, and BS. Results indicated that mangrove species (Rhizophora racemosa) growth was optimum 4WPR than 0WPR and 6WPR and could, therefore, be recommended as a management practice for controlling the growth of Nypa fruticans and regenerating mangrove (Rhizophora racemosa) in the study area.

scholarly journals Review: Antioxidant Activity Test of Various Types of Mangroves

2021 ◽  
Vol 6 (8) ◽  
pp. 32-41
Author(s):  
Erlinda Nengsih ◽  
Aried Eriadi ◽  
Anzharni Fajrina
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Secondary Metabolites ◽  
Avicennia Marina ◽  
Antioxidant Power ◽  
Mangrove Plants ◽  
Nypa Fruticans ◽  
Acanthus Ilicifolius ◽  
Ic50 Value ◽  
Sonneratia Alba

Free radicals are reactive oxygen that have unpaired electrons looking for partners by binding to electron molecules in the vicinity. Free radicals can cause several degenerative diseases such as diabetes, atherosclerosis, Parkinson's disease, Alzheimer's disease. The content of secondary metabolites in mangroves has the potential to prevent various diseases. Several methods commonly used to estimate the presence of antioxidants in plants include DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferrous reducing antioxidant power), and ABTS (2,2-azinobis-3-ethylbenzothiazole-6-sulfonic acid). The results of recent studies showed that some mangrove plants have antioxidant activity including: Rhyzophora mucronata, Nypa fruticans, Avicennia marina, Sonneratia alba, Acanthus ilicifolius L, Acrostichum aureum dan Scaevola taccada. Mangrove plants that have the highest IC50 value were found in leaves (methanol extract). The antioxidant activity of mangrove plants is caused by the presence of secondary metabolites contained in the extract such as flavonoids, phenolics, saponins, and tannins.

scholarly journals Mangrove Plants Use As Medicine In Gedangan Village, Purwodadi District, Purworejo Regency, Central Java Province

2020 ◽  
Vol 5 (2) ◽  
pp. 76-84
Author(s):  
Slamet Mardiyanto Rahayu ◽  
Sunarto
Keyword(s):  
Mangrove Forest ◽  
Medicinal Products ◽  
Mangrove Species ◽  
Mangrove Area ◽  
Mangrove Plants ◽  
Central Java ◽  
Nypa Fruticans ◽  
Acanthus Ilicifolius ◽  
Sonneratia Alba ◽  
Central Java Province

Coastal ecosystems have high plant levels, for example mangroves and seagrasses. Mangrove forest is a type of forest located in tidal areas, especially on protected beaches, lagoons, river estuaries that are inundated and free from inundation at low tide, whose plant communities tolerate salt. Gedangan Village is one of the villages in Purwodadi District, which has mangrove areas in Purworejo Regency. This study aims to determine the types of mangrove plants that are useful the Gedangan Village, Purwodadi District, Purworejo Regency, Central Java as medicinal products. The study was conducted using roaming method in the form of observations or field observations in the mangrove area of Gedangan Village, Purwodadi District, Purworejo Regency, Central Java. Based on the research, there were eight (8) types of mangrove plants that were found as medicinal plants in Gedangan Village, namely Rhizophora mucronata, Sonneratia alba, Calotropis gigantea, Nypa fruticans, Acanthus ilicifolius, Hibiscus tiliaceus, Ipomoea pescaprae, and Wedelia biflora. Traditionally, these mangrove species can be used as a medicine items for beri-beri, hepatitis, ulcers, wounds, diarrhea, fever, antibacterial, anti-inflammatory, dizziness, asthma, bronchitis, dyspepsia, leprosy, tumors, diabetes, stomach ache, toothache, thrush, tuberculosis, muscle aches, and eczema.

Vegetasi Mangrove sebagai Bahan Makanan pada Empat Suku di Papua Mangrove Vegetation as Foods amongst Ethnics in Papua

2011 ◽  
Vol 16 (1) ◽  
Author(s):  
Mahmud Mahmud
Keyword(s):  
Bruguiera Gymnorrhiza ◽  
Nypa Fruticans ◽  
Sonneratia Alba ◽  
Mangrove Vegetation ◽  
Ceriops Tagal

Vegetasi mangrove merupakan salah satu bagian penting dalam kehidupan masyarakat Papua. Penelitian dilakukan dengan observasi lapangan dan telah pustaka. Tujuan penelitian untuk mengetahui vegetasi mangrove yang dipergunakan sebagai bahan makanan pada empat suku yang ada di Papua Hasil penelitian menunjukkan terdapat 7 jenis dari 3 suku vegetasi mangrove yang dimanfaatkan sebagai makanan. Ke-7 jenis tersebut :Bruguiera gymnorrhiza Lam, Ceriops tagal B.Rob, Nypa fruticans Wurmb, Bruquiera parviflora, Rhizopora apiculata, Sonneratia alba J.Sm, dan Sonneratia avota dari 3 suku Rhizophoraceae, Sonneratiaceae, Arecaceae. Kegunaan vegetasi mangrove sebagai bahan makanan di antaranya: sebagai makanan pokok, rujakan, pengganti pinang, pengganti kelapa, penambah rasa, dan minuman.

Applying the Method of Lagrange Multipliers to Derive an Estimator for Unsampled Soil Properties

2014 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Set Foong Ng ◽  
Pei Eng Ch’ng ◽  
Yee Ming Chew ◽  
Kok Shien Ng
Keyword(s):  
Soil Properties ◽  
Lagrange Multipliers ◽  
Unbiased Estimator ◽  
Soil Property ◽  
Minimum Variance ◽  
Distance Method ◽  
True Value ◽  
A Site ◽  
Method Of Lagrange Multipliers ◽  
Inverse Distance

Soil properties are very crucial for civil engineers to differentiate one type of soil from another and to predict its mechanical behavior. However, it is not practical to measure soil properties at all the locations at a site. In this paper, an estimator is derived to estimate the unknown values for soil properties from locations where soil samples were not collected. The estimator is obtained by combining the concept of the ‘Inverse Distance Method’ into the technique of ‘Kriging’. The method of Lagrange Multipliers is applied in this paper. It is shown that the estimator derived in this paper is an unbiased estimator. The partiality of the estimator with respect to the true value is zero. Hence, the estimated value will be equal to the true value of the soil property. It is also shown that the variance between the estimator and the soil property is minimised. Hence, the distribution of this unbiased estimator with minimum variance spreads the least from the true value. With this characteristic of minimum variance unbiased estimator, a high accuracy estimation of soil property could be obtained.

AVAILABLE WAYS TO OPTIMIZE SOIL PROPERTIES IN APPLE ORCHARDS

2020 ◽  
Vol 16 (2) ◽  
pp. 41-63
Author(s):  
V.L. Zakharov ◽  
◽  
G.N. Pugachev ◽  
Keyword(s):  
Soil Properties ◽  
Apple Orchards
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