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

Author(s):  
Naohiro Matsui ◽  
Yasuyuki Okimori ◽  
Fumio Takahashi ◽  
Koji Matsumura ◽  
Noparat Bamroongrugsa
2021 ◽  
Vol 07 (04) ◽  
pp. 598-613
Author(s):  
Akpan ◽  
Utibe Emmanuel ◽  
Obafemi ◽  
Andrew Adesola ◽  
Tanee ◽  
...  

2016 ◽  
Vol 6 (1) ◽  
pp. 125 ◽  
Author(s):  
Naohiro Matsui ◽  
Fumio Takahashi

<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>


2020 ◽  
Vol 70 (2) ◽  
pp. 1112-1116 ◽  
Author(s):  
Rungluk Kaewwichian ◽  
Pannida Khunnamwong ◽  
Somjit Am-In ◽  
Sasitorn Jindamorakot ◽  
Savitree Limtong

2017 ◽  
Vol 21 (1) ◽  
pp. 265-278
Author(s):  
Piti Chantruthai ◽  
Thananan Areepong ◽  
Sasitorn Issaro ◽  
Saravut Jaritngam

2020 ◽  
pp. 82-91

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.


2014 ◽  
Vol 4 (4) ◽  
Author(s):  
Naohiro Matsui ◽  
Yasuyuki Okimori ◽  
Fumio Takahashi ◽  
Koji Matsumura ◽  
Noparat Bamroongrugsa

1998 ◽  
Vol 25 (7) ◽  
pp. 541-544 ◽  
Author(s):  
S. Sirirungrojying ◽  
S. Srisintorn ◽  
P. Akkayanont

2011 ◽  
Vol 16 (1) ◽  
Author(s):  
Mahmud Mahmud

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.


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