scholarly journals Carbon Potentials in Biomass of Fruit Trees in Home Gardens in the Bogor Regency, West Java

2021 ◽  
Vol 4 (2) ◽  
pp. 118-129
Author(s):  
Dian Adijaya Susanto ◽  
Kuswata Kartawinata ◽  
Nisyawati
Keyword(s):  
Mangifera Indica ◽  
Fruit Trees ◽  
Total Biomass ◽  
West Java ◽  
Artocarpus Heterophyllus ◽  
Durio Zibethinus ◽  
Rich Diversity ◽  
Nephelium Lappaceum ◽  
C Stocks ◽  
The Mean

A study using the point centered quarter method for trees and quadrats for saplings in homegardens of 41 hamlets within 40 districts in the Bogor Regency, West Java, revealed a rich diversity of fruit trees. Artocarpus heterophyllus, Nephelium lappaceum, Mangifera indica, and Durio zibethinus were the dominant and widely distributed fruit tree species. Above ground biomass of trees and saplings were calculated using allometric equations and the C (carbon) stocks were estimated by assuming that C constitutes 50% of biomass. The total biomass of trees with diameter at breast height ≥ 10 cm amounted to 1,081.7 tons, varied between hamlets from 10.1 to 66.7 tons/ha and the mean per hamlet of 26.4 ± 9.9 ton/ha, while that of saplings with diameter of 2 to 9.9 cm recorded to be 390.4 tons with a range between hamlets of 3.9 to 12.9 tons/ha and the mean per hamlet of 9.5 ± 3.7 tons/ha. The total aboveground C stocks was 540.9 tons for trees with a range between hamlets of 5.1 to 33.4 tons/ha and the mean per hamlet of 13.2 ± 4.9 tons/ha, while that of saplings was 195.2 tons with a range between hamlets of 0.7 to 9.4 tons/ha and the mean per hamlet of 4.9 ± 1.8 tons/ha. The main fruit trees with highest carbon sequestration capacity were Artocarpus heterophyllus, Mangifera indica, Mangifera foetida, and Sandoricum koetjape.

scholarly journals Flooding tolerance of four tropical peatland tree species in a nursery trial

2021 ◽  
Author(s):  
Hesti Lestari Tata ◽  
Hani Sitti Nuroniah ◽  
Diandra Ajeng Ahsania ◽  
Haning Anggunira ◽  
Nurul Hidayati ◽  
...  
Keyword(s):  
Tree Species ◽  
Plant Traits ◽  
Fruit Trees ◽  
Water Levels ◽  
Tree Level ◽  
Tree Seedlings ◽  
Peat Soils ◽  
Durio Zibethinus ◽  
Nephelium Lappaceum ◽  
Plot Design

In order to facilitate hydrological restoration efforts, initiatives have been conducted to promote tree growth in degraded and rewetted peatlands in Indonesia. For this initiatives to be successful, tree seedlings need to be able to survive flooding episodes, with or without shade. We investigated the survival of different shading and water levels under controlled conditions in a nursery, with artificial rainwater and with peat soils as the medium. The research focused on the fllowing questions (i) whether trees can grow on flooded peat soils; and (ii) which plant traits allow plants to cope with inundation, with or without shade. The four tree species compared ( Shorea balangeran, Cratoxylum arborescens, Nephelium lappaceum, and Durio zibethinus ) include two natural poineer and two farmer-preferred fruit trees. The experiment used as a split-split plot design with 48 treatment combinations and at least 13 tree-level replicates. The study found that S. balangeran and C. arborescens developed adventitious roots to adapt to the inundated conditions. D. zibethinus, S. balangeran and N. lappaceum grew best under moderate (30%) shading levels, while C. arborescens grew best in full sunlight.

Essai d'application de modèles météorologiques au calcul du moment d'apparition de deux phases phénologiques | Application of Meteorological Models for the Calculation of the Beginning of Two Phenological Phases

2000 ◽  
Vol 151 (10) ◽  
pp. 385-397
Author(s):  
Bernard Primault
Keyword(s):  
Sunshine Duration ◽  
Fruit Trees ◽  
Swiss Alps ◽  
Winter Solstice ◽  
Phenological Data ◽  
Thermal Thresholds ◽  
The Mean ◽  
Two Parameters ◽  
Meteorological Models ◽  
Phenological Phases

Many years ago, a model was elaborated to calculate the«beginning of the vegetation's period», based on temperatures only (7 days with +5 °C temperature or more). The results were correlated with phenological data: the beginning of shoots with regard to spruce and larch. The results were not satisfying, therefore, the value of the two parameters of the first model were modified without changing the second one. The result, however, was again not satisfying. Research then focused on the influence of cumulated temperatures over thermal thresholds. Nevertheless, the results were still not satisfying. The blossoming of fruit trees is influenced by the mean temperature of a given period before the winter solstice. Based on this knowledge, the study evaluated whether forest trees could also be influenced by temperature or sunshine duration of a given period in the rear autumn. The investigation was carried through from the first of January on as well as from the date of snow melt of the following year. In agricultural meteorology, the temperature sums are often interrelated with the sunshine duration, precipitation or both. However,the results were disappointing. All these calculations were made for three stations situated between 570 and 1560 m above sea-level. This allowed to draw curves of variation of the two first parameters (number of days and temperature) separately for each species observed. It was finally possible to specify the thus determined curves with data of three other stations situated between the first ones. This allows to calculate the flushing of the two tree species, if direct phenological observation is lacking. This method, however, is only applicable for the northern part of the Swiss Alps.

scholarly journals Characterization of Two Ethephon-Induced IDA-Like Genes from Mango, and Elucidation of Their Involvement in Regulating Organ Abscission

Genes ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 439
Author(s):  
Avinash Chandra Rai ◽  
Eyal Halon ◽  
Hanita Zemach ◽  
Tali Zviran ◽  
Isaac Sisai ◽  
...  
Keyword(s):  
Expression Profiles ◽  
Mangifera Indica ◽  
Ectopic Expression ◽  
Fruit Trees ◽  
Floral Organ ◽  
Cytosolic Ph ◽  
Early Increase ◽  
Encoding Genes ◽  
Fruitlet Abscission

In mango (Mangifera indica L.), fruitlet abscission limits productivity. The INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) peptide acts as a key component controlling abscission events in Arabidopsis. IDA-like peptides may assume similar roles in fruit trees. In this study, we isolated two mango IDA-like encoding-genes, MiIDA1 and MiIDA2. We used mango fruitlet-bearing explants and fruitlet-bearing trees, in which fruitlets abscission was induced using ethephon. We monitored the expression profiles of the two MiIDA-like genes in control and treated fruitlet abscission zones (AZs). In both systems, qRT-PCR showed that, within 24 h, both MiIDA-like genes were induced by ethephon, and that changes in their expression profiles were associated with upregulation of different ethylene signaling-related and cell-wall modifying genes. Furthermore, ectopic expression of both genes in Arabidopsis promoted floral-organ abscission, and was accompanied by an early increase in the cytosolic pH of floral AZ cells—a phenomenon known to be linked with abscission, and by activation of cell separation in vestigial AZs. Finally, overexpression of both genes in an Atida mutant restored its abscission ability. Our results suggest roles for MiIDA1 and MiIDA2 in affecting mango fruitlet abscission. Based on our results, we propose new possible modes of action for IDA-like proteins in regulating organ abscission.

scholarly journals REHABILITASI HUTAN DAN LAHAN BERDASARKAN KEARIFAN LOKAL SUKU MOILE DAN SUKU MEYAH DI KABUPATEN MANOKWARI PROVINSI PAPUA BARAT (Rehabilitation of Forest and Land Based On Local Knowledge of Moile and the Meyah in Manokwari Regency West Papua Province)

2017 ◽  
Vol 24 (3) ◽  
pp. 141
Author(s):  
Mervin Arison Asmuruf ◽  
Ris Hadi Purwanto ◽  
Lies Rahayu Wijayanti Faida
Keyword(s):  
Local Knowledge ◽  
Local Community ◽  
Economic Value ◽  
Combination Method ◽  
Snowball Sampling ◽  
Durio Zibethinus ◽  
Aquilaria Malaccensis ◽  
Nephelium Lappaceum ◽  
West Papua ◽  
Papua Barat

ABSTRAKKajian Rehabilitasi Hutan dan Lahan (RHL) di Kabupaten Manokwari Provinsi Papua Barat telah dilakukan dengan berdasarkan kearifan lokal Suku Moile dan Suku Meyah. Penelitian ini bertujuan untuk mengetahui jenis–jenis tanaman lokal, indentifikasi kearifan lokal masyarakat Suku Moile dan Suku Meyah dan merumuskan strategi RHL berdasarkan kearifan lokal masyarakat. Penelitian ini dilakukan di Kampung Sub Sai Distrik Warmare dan Kampung Lebau Distrik Manokwari Utara Kabupaten Manokwari Provinsi Papua Barat. Teknik pengambilan data adalah pendekatan metode kombinasi data primer dan sekunder yang diperoleh melalui observasi lapangan, wawancara dengan teknik Snowball sampling dan penelusuran dokumen. Metode deskriptif dengan analisis Miles dan Huberman digunakan untuk mengidentifikasi kearifan lokal Suku Moile dan Suku Meyah. Hasil penelitian menunjukkan bahwa jenis-jenis tanaman lokal yang berpotensi digunakan dalam kegiatan RHL di Kabupaten Manokwari adalah: tanaman yang mempunyai kualitas kayu pertukangan yang baik dan memiliki nilai ekonomis tinggi, seperti: kayu besi (Intsia bijuga), kayu susu (Astonia sp), kayu matoa (Pometia sp).  Di samping tanaman yang buah dan kulitnya bernilai ekonomi tinggi sehingga dapat menambah penghasilan masyarakat, seperti: buah merah (Pandanus conoideus), Gaharu (Aquilaria malaccensis), Mangga (Manggifera indica), Rambutan (Nephelium lappaceum), Durian (Durio Zibethinus). Masyarakat Arfak pada kawasan ini memiliki nilai dan kearifan budaya Igya Ser Hanjob yang artinya berdiri menjaga batas. Kawasan hutan yang dimanfaatkan terbagi atas 4 (empat) bagian yakni Susti, Bahamti, Nimahamti dan Tumti, dengan fokus kegiatan RHL seharusnya dilakukan di Susti dan Nimahamti yang berfungsi sebagai kawasan penyangga.ABSTRACTStudy of the Forest and Land Rehabilitation (FLR) in Manokwari Regency West Papua Province have been done based on local knowledge of Moile and the Meyah. This research aims to know the type of local plants, identification the local wisdom of a tribal society Moile and Tribe Meyah and formulate the FLR strategy based on the wisdom of the local community. The study is done in sub sai vilagge warmare district and lebau vilagge manokwari the northern district manokwari counties provincial west papua. Techniques used in the data is the approach combination method through observation field, interviews with snowball sampling techniques and the tracing documents. Descriptive method with an analysis Miles and Huberman used to identify local knowledge of Moile and Meyah. The results showed that the local-crop potentially used FLR in the district Manokwari intsia bijuga asltonia sp, pometia .sp, where its have good quality for use as timber carpentry having high as well as economic value and Pandanus conoideus, Aquilaria malaccensis, Manggifera indica, Nephelium lappaceum, Durio Zibethinus which fruit and the skin can be utilized to add community incomes. The community arfak in this area has a value and culture igya wisdom similar hanjob which means keeping the limit stood, forest areas being utilized divided over 4 (four) : susti, bahamti, nimahamti and tumti , where RHL activities should be undertaken in susti and nimahamti because it can function as buffer area

Operation of a nitrifying activated sludge airlift (NASA) reactor without biomass carrier

2000 ◽  
Vol 41 (4-5) ◽  
pp. 113-120 ◽  
Author(s):  
J.L. Campos ◽  
R. Mendez ◽  
J.M. Lema
Keyword(s):  
Activated Sludge ◽  
Air Flow ◽  
Small Diameter ◽  
Operation Time ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Total Biomass ◽  
Low Concentrations ◽  
The Mean ◽  
Very High

An ammonia loading rate of 4.1 kg N-NH4+/m3d was fully oxidized to nitrate using a nitrifying airlift without biomass carrier. The developed sludge, with a concentration of 12 gVSS/L and high density (100 gVSS/Lparticle), allowed particles to be retained with small diameter, having very low concentrations of solids in the effluent (5–10 mg VSS/L). The mean diameter of particles containing the majority of total biomass increased from 220 to 360 m during the operation time. The particle size analysis showed that the percentage of flocs with small diameter (1–3 m) is very high but the biomass content of these flocs is negligible with respect to the total biomass value. The oxygen transfer coefficient (KLa) was measured operating at different air flow rates, obtaining similar values during the overall operational period. The use of activated sludge without support gives high nitrifying rates with an easier fluidization and a lowercritical air flow rate than in a biofilm airlift reactor.

scholarly journals Quantification of Environmental Flow Requirement for some Rivers in West Java

2020 ◽  
Vol 148 ◽  
pp. 07003
Author(s):  
Waluyo Hatmoko ◽  
Levina ◽  
Radhika ◽  
Amirwandi ◽  
Rendy
Keyword(s):  
Water Conservation ◽  
Environmental Flow ◽  
Dry Season ◽  
Mean Flow ◽  
West Java ◽  
Food And Agriculture ◽  
Food And Agriculture Organization ◽  
Tennant Method ◽  
The Mean ◽  
Flow Requirement

Sustainable Development Goal (SDG). Water management is making a balance between water for livelihood and water as a resource. Environmental Flow Requirement (EFR) is water conservation, on the side of the water for livelihood, to sustain the river ecosystem. In Indonesia, the common quantification of EFR is dependable flow Q95%. However, there are alternative quantities: a) Guideline of irrigation states that 5% from the available water in the river is for environmental purposes; b) Adoption of the Tennant Method of using 10% of the mean flow; and recently Food and Agriculture Organization (FAO) in the framework of SDG proposed that in Java Island the EFR is from 40% to 50% of the mean annual flow. This paper discusses several ways of quantification of the EFR in Indonesia, and apply the different EFR quantities to Citarum, Cimanuk, and Cimandiri Rivers in West Java. It is concluded that EFR quantity according to FAO that might be suitable for the rivers in the pristine catchments in the southern part of West Java is too high for the rivers in the northern part of West Java which is heavily populated and maturely developed. Furthermore, the dependable flow of Q95% is found to be close to the quantity of FAO, but in the dry season, Q95% is more suitable. It is recommended using a modified FAO that combine with Q95% during the dry season.

scholarly journals Effects of potassium fertilization on Radiocaesium transfer from sandy soil to barley (Hordeum vulgare L.)

2019 ◽  
Vol 48 (2) ◽  
pp. 387-394
Author(s):  
SM Soliman ◽  
Ahmed A Moursy ◽  
HS Eissab
Keyword(s):  
Hordeum Vulgare ◽  
Plant Growth ◽  
Sandy Soil ◽  
Growth Period ◽  
Total Biomass ◽  
Discrimination Factor ◽  
Hordeum Vulgare L ◽  
Sand Soil ◽  
The Mean ◽  
Experimental Soil

Uptake and translocation of radiocesium artificially added to sand soil cultivated with barley as affected by different rates of potassium were traced in outdoor pot experiment. Experimental soil was contaminated with 0.01 and 0.1 mM 137Cs equal to (200 and 400 Bq/kg) in the form of CsCl and incubated for 14 days prior to 150 days plant growth period. The transfer factor (TF) average values from soil-to-total biomass were found to range from 0.40 up to 0.53 as affected by interaction between tested treatments. Increasing K rates from 125 to 250 kg/ha markedly reduced the mean averages of TFs of 137Cs from soil-to-roots by about 24 to 68%, respectively and from soil-to-total biomass by about 36 and 74%, respectively lower than corresponding control. In all cases, the discrimination factor was below unity, indicating that Cs is less efficiently absorbed from soil than its nutrient analogue K.

scholarly journals Spatial autocorrelation of phytoplankton biomass is weak in the rivers of Lake Taihu Basin, China

2019 ◽  
pp. 35
Author(s):  
Zhaoshi Wu ◽  
Ming Kong ◽  
Yamin Fan ◽  
Xiaolong Wang ◽  
Kuanyi Li
Keyword(s):  
Community Structure ◽  
Spatial Autocorrelation ◽  
Phytoplankton Biomass ◽  
Phytoplankton Community ◽  
Lake Taihu ◽  
Total Biomass ◽  
Phytoplankton Community Structure ◽  
River Systems ◽  
Toxic Cyanobacteria ◽  
The Mean

We investigated the characteristic of phytoplankton community structure across the entire Lake Taihu Basin (LTB), one of the most developed areas in China. A morphologically based functional group (MBFG) proposed by Kruk et al. (2010), especially potential toxic cyanobacteria (group III and VII), was also illustrated. Samples were collected at 96 sites along main rivers throughout the four seasons from September 2014 to January 2016. Significant differences in the phytoplankton community structure were observed at spatial (particularly between Huangpu/Tiaoxi and the other 4 river systems) and seasonal scales. On a spatial basis, high variability was observed in the mean phytoplankton biomass, with a relatively high value of 3.13 mg L−1 in Yanjiang system and a relatively low value in Huangpu (1.23 mg L−1) and Tiaoxi (1.44 mg L−1) systems. The mean biomass of potential toxic cyanobacteria accounted for 18.28% of the mean total biomass spatially, which was more abundant in Nanhe and Yanjiang systems. Spatial autocorrelation was weak for the total biomass and its four main components (bacillariophyta, chlorophyta, euglenophyta, and cyanobacteria) at whole basin scale regardless of season. Regarding the river system, significant autocorrelation was scarcely observed in all the river systems except Huangpu, especially in the inflows. The characteristic in terms of hydrological and environmental conditions may determine the community structure of the 6 river systems. Our study highlighted the importance of monitoring based on a large spatial scale, and more attention should be paid to potential toxic cyanobacteria for water quality management purposes.

The ratio of total to merchantable forest biomass and its application to the global carbon budget

1983 ◽  
Vol 13 (3) ◽  
pp. 372-383 ◽  
Author(s):  
W. Carter Johnson ◽  
David M. Sharpe
Keyword(s):  
United States ◽  
Carbon Storage ◽  
Woody Debris ◽  
Forest Biomass ◽  
Total Biomass ◽  
Global Carbon Budget ◽  
The Mean ◽  
Carbon Losses ◽  
Global Carbon ◽  
Level Analysis

Records of merchantable forest volumes can be used to estimate rates of carbon storage or depletion using a ratio to convert merchantable weights to total forest biomass (T/M ratio). We present evidence that the T/M ratio used to estimate carbon storage in midlatitude forests has been seriously underestimated by neglecting carbon in trees of unmerchantable size and quality and in coarse and fine litter. Ratios for forest types and size classes in Virginia based on detailed plot-level analysis ranged from 2.1 to 5.0; the mean weighted ratio of 2.7 was 55% greater than a ratio currently in use. More general analysis indicated that the T/M ratio for Virginia was representative of forests of the East; forests of the western United States were comparable to those of the East when woody debris was included in the estimate of total biomass. Application of the weighted ratio to growth of United States forests during 1952–1977 yielded a per-annum accretion of carbon in biomass (excluding soil carbon) of 0.15 Gt C•year−1, about 10% of the 1.6–1.9 Gt C•year−1 computed for midlatitude forests. More complete studies of counterbalancing carbon losses from forests, particularly losses in litter and soils after forest harvest and conversion to agriculture, are needed before the source or sink nature of midlatitude forests can be determined with confidence.

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