scholarly journals Productivity of Pangi (Pangium edule Reinw.) and biodiversity of agroforestry systems at various altitudes in Toraja Regency, South Sulawesi

2021 ◽  
Vol 886 (1) ◽  
pp. 012062
Author(s):  
Syamsuddin Millang

Abstract There are two important things that farmers consider in selecting and developing plant species in their agroforestry system, namely productivity and suitability to the site. This study aims to determine the productivity of the pangi crop and the biodiversity of the agroforestry system at different altitudes. This research was conducted from June to November 2018 at three different altitudes, namely in Lembang Palesan (Rembon District) which represents an altitude of <600 m above sea level, Lembang Turunan (Sangalla District) which represents an altitude of 800-850 m above sea level, and Lembang Gasing (Mengkendek District) which represents an altitude of > 1000 m above sea level. The research method used is a survey method with the placement of sample plots by Purposive Sampling. The sample plot size is 20m x 50m or 0.1 ha. At each different altitude, 10 sample plots were made, so the number of sample plots was 30. The parameters measured were pangi fruit production, tree diameter and height and recorded all plant species in the sample plot. Data analysis was carried out quantitatively and descriptively, while agroforestry system plant species diversity was identified using vegetation analysis methods. The results showed that the fruit production of the pangi plant, density, LBDS and diameter of the pangi tree were significantly different at each different altitude and the largest was at an altitude of 800-850 m above sea level, but the number of plant species and the diversity of plant species at each altitude were relatively the same in the medium category, as well as the density of all types of plants, and the average height of pangi trees were not significantly different at each different altitude. Thus, it is not recommended that pangi crop be developed at an altitude above 850 m above sea level.

2015 ◽  
Vol 3 (2) ◽  
pp. 31
Author(s):  
Tiopan Tua Halomoan Simamora ◽  
Indriyanto . ◽  
Afif Bintoro

Liana is one type of plant that becomes typical characteristic of a tropical rain forest ecosystem and its presence adds to the diversity of plant species in the forest ecosystem.  The purposes of the study were to identify the species of liana, species of cantilever plant, and to know the number of liana species associated with the species of cantilever plant in the protection block of Wan Abdul Rachman Great Forest Park, especially in the area of Way Balau Sub watershed.  The research was conducted on September to Oktober 2013.  The sampling method was used line terraced layer.  The size of each sample plot was 20 m x 20 m with sub plots 10 m x 10 m, 5 m x 5 m, 2 m x 2 m.  Liana and cantilever plants species were inventoried by 0.2% sampling intensity from 796.50 ha.  Observed variables were the species and the number of lianas, spesies of cantilever plant and its number.  The result of research were identified 8 species of liana and 35 spesies of cantilever plants.  Liana density was 1.599 individual/ha and cantilever plant density was 1.594 individual/ha, and it had a good enough distribution because there was no dominant species. The plant that most liked by liana is dadap (Erythrina lithosperma) and liana that mostly found is rayutan (Paederia tomentosa). Keyword:  cantilever plant, liana, Protection Block of Wan Abdul Rachman GreatForest Park


2019 ◽  
Vol 15 (2) ◽  
pp. 80-91
Author(s):  
Dilyan N Ramlan ◽  
Johan Riry ◽  
Vilma L Tanasale

The purpose of this study was to analyze the types of dominant weeds in rubber plantation areas at altitudes of 4 m above sea level (asl) and 104 m asl and to find differences in the types of weeds in the rubber plantation areas at an altitude of 4 m asl and 104 m asl. This research conducted in Negeri Liang, Teluk Elpaputih District, Central Maluku Regency. This research used a "weed survey" method to collect data by direct observation in the field. This research was conducted by analyzing weed types using the quadratic method by purposive sampling with a sample plot size of 1 m × 1 m. From this study, it was found that there were 20 weed species from 14 families, with details of 11 species of full leaf weeds, 3 species of grasses, 3 species of sedges, in rubber plantation habitat in Liang Village, Teluk Elpaputih District, Central Maluku Regency. Keywords: plantation altitude, rubber plants, weeds   ABSTRAK Tujuan penelitian ini adalah untuk menganalisis jenis-jenis gulma dominan di areal perkebunan karet pada ketinggian 4 m dpl dan 104 m dpl dan untuk menemukan perbedaan jenis-jenis gulma di areal perkebunan karet pada ketinggian 4 m dpl dan 104 m dpl. Penelitian ini dilaksanakan di Negeri Liang Kecamatan Teluk Elpaputih Kabupaten Maluku Tengah. Dengan menggunakan metode “survey gulma” untuk mengumpulkan data dengan pengamatan langsung di lapangan. Dengan melakukan analisis jenis gulma digunakan metode kuadrat secara purposive sampling dengan petak sampel berukuran 1 m × 1 m. Penelitian ini di peroleh terdapat 20 jenis gulma 14 famili, dengan rincian gulma daun lebar 11 jenis, rerumputan 3 jenis, tekian 3 jenis, dan pakisan 3 jenis pada habitat perkebunan karet di Negeri Liang Kecamatan Teluk Elpaputih Kabupaten Maluku Tengah. Kata kunci: gulma, ketinggian tempat yang berbeda, tanaman karet


2021 ◽  
pp. 32-40
Author(s):  
Lavdi Hasani

In this paper, one of the most specific groups of plant entomologists, that of the U/Order Coccoinea Class Insecta is taken into analysis. Below it is seen important to identify the problems of infections of a variety of ornamental plants, found in the Southern Region of Albania, precisely by this group of pests. The role of the quality of the natural environment in our health has recently taken tremendous priority in the context of the contamination of all forms in the wild nature and especially those in the air. Precisely, to increase the quality of our life, the establishment of major parks with a truly significant green space per unit of population, is one of the current main objectives of each country. In these conditions, those environments are pretty rich in a variety of plants that, in addition to the functional values of environmental creativity, also have many aesthetic values with relaxing  power and positive effects on our physical and mental health This type of plants is represented not only by those that are cultivated directly in the nature, but also by those that are planted and cultivated in greenhouses, which from time to time we take them out to realize the required decorations and compositions, asked to cover the needs of the parks. The healthier these components of this environment are, the more effective is their role on our personal health. For this reason it is equally important to recognize the dangers that threaten this vegetation by disabling its main function, for which we, as citizens, are interested, due to the need of our health, to have it in the highest efficiency. On this basis arose the idea of a comprehensive study on the above group of insects, which in a form or another constitute some of its main pests. These insects, as a specific group of pests that feed on plant lymph, not only dry out the plant, but also transmit to it a series of viral diseases, leading the plant to complete degradation. Most of them spend the winter (one of the most delicate periods for their survival) as parasites on them. We show below, which of these entomophytes is found in this group of plants in the region in question. It is also shown, which of the analyzed plant species emerges as the most frequented by this group of pests. We also identify the prevalence of this pollution in both variety and percentage. On the basis of the analysis, the question is also what is the distribution of plant species encountered, at different altitudes above the sea level? The paper contains, figuratively, a series of morpho-defining characteristics of the representatives, mentioned in this paper. As will be seen in the following material, the truth is that this specific group of ornamental plants, part of the relaxing parks around the world, in our country turns out to be contaminated by a large number of these parasites. This shows that in order to carry out quality work in this direction, we must not leave without considering the role of these pests in this process. Thus, we will be able to control the quality and function of our recreational environments in the role, for which we realize them. For this reason, detailed data are given below. We have identified these parasites in about 15 (fifteen) species of these ornamental plants, taking into account that parks in our country are not valued for the size of the area, as in an inferior and small country. In this material we have identified the number and dynamics of parasites according to each plant and also according to their distribution in areas with different altitudes above the sea level. We also give a comparative report on the frequency of vulnerability of the various plants by representatives of these pests. Summarized in a table, we have given for each pest the plant variety that it frequents, noting, in which plant organ this parasite was most commonly found during our research. As it is a group with annual activity on the plants, we have data for each month that we have met them on this vegetation and for each plant organ, where they were met (in leaves, on stalks or even the fruit itself). Regarding the degree of the damage that they cause to the plants, given the many harmful valences they show, not all belong to the category of the very dangerous pests. Some enter the minor pests that are mostly caused by overlapping other diseases, some others into the normal pests and a more specific group enters the category of very powerful pests, the risk of which is maximized with other additional effects. These and other information are given in table Number 1 (one), with the required symbolism. Since this group of plants is the environmental generator, where we live and work, the work in question takes on practical importance and value


2019 ◽  
Vol 1 ◽  
pp. 3-11
Author(s):  
Lavdi Hasani

The following work deals with the problems of infections of a variety of fruit trees plants met in the Southern Region of Albania. In the analysis one of the most specific groups of plant-entomologists has been obtained, that of the U / Order Coccidia Class Insecta. These insects represent a specific set of pests that feed on plant lymphoma through a highly developed oral drip type suppressor. In this way they not only mechanically damage the plant but also convey it to many viral illnesses in the lymph, leading it to complete degradation. They are so closely related to the plant that, most of them, even wintering (one of the most delicate periods for plant survival itself) passes like parasites on them. Through this work, it is shown which of these entomophytes have met in this plant group in the region concerned? Which of the plant species analyzed is found most frequented by this group of pests and what is the spread of this contamination in both variety and percentage; also by analyzing the distribution of plant species encountered, at different altitudes over sea level? The paper contains, figuratively, a series of morpho-determining features of the representatives cited in this paper. Given that this plant group is one of the main sources of vitamins for vegetarian foods for mankind, this work itself takes on importance and practical value.


EUGENIA ◽  
2018 ◽  
Vol 24 (1) ◽  
Author(s):  
Andreas A.T. Suli ◽  
Jailani Husain ◽  
Hengki D. Walangitan

ABSTRACT South Minahasa Regency have a topography that varied from lowland to highland. Until now there has been no research on differences in the performance of agroforestry systems of lowland and highland agroecological zones. The purposes of this study were to analyze the diversity of plant species and to estimate the biomass amount of agroforestry systems at lowland and highland agroecological zones. The research was carried out from October to December 2017 at two different agroecological zones, namely; the highland (Mokobang Village) and the lowland (Blongko Village). The results showed that there were 21 plant species at lowland having 4 plant species in average, while 30 plant species were found in the highland with 6 plant species in average. The biomass of 0.25 to 13.11 Mg ha-1 with an average of 3.47 Mg ha-1 was found at lowland, whereas the highland contained 0.34 to 98.65 Mg ha-1 with an average of 27.40 Mg ha-1 biomass. It is concluded that in South Minahasa Regency the highland agroforestry system had more plant species and had more carbon sequestration than that of lowland.Keywords : agroforestry, highland zone, lowland zone


1998 ◽  
Vol 29 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Peter Raben ◽  
Wilfred H. Theakstone

Marked vertical variations of ions and oxygen isotopes were present in the snowpack at the glacier Austre Okstindbreen during the pre-melting phase in 1995 at sites between 825 m and 1,470 m above sea level. As the first meltwater percolated from the top of the pack, ions were moved to a greater depth, but the isotopic composition remained relatively unchanged. Ions continued to move downwards through the pack during the melting phase, even when there was little surface melting and no addition of liquid precipitation. The at-a-depth correlation between ionic concentrations and isotopic ratios, strong in the pre-melting phase, weakened during melting. In August, concentrations of Na+ and Mg2+ ions in the residual pack were low and vertical variations were slight; 18O enrichment had occurred. The difference of the time at which melting of the snowpack starts at different altitudes influences the input of ions and isotopes to the underlying glacier.


2017 ◽  
Vol 35 (0) ◽  
Author(s):  
J. IQBAL ◽  
H.A. RAUF ◽  
A.N. SHAH ◽  
B. SHAHZAD ◽  
M.A Bukhari

ABSTRACT Selection of tree species under agroforestry systems is crucial to sustain the productivity of a crop. In present study, allelopathic effects of the leaf litters of 5 trees named Rose wood (Dalbergia sissoo), Guava (Pisidium guajava), Eucalyptus (Eucalyptus camaldulensis), Sacred fig (Ficus religiosa) and Jaman (Syzygium cumini) species on wheat growth and yield was examined. Leaf litter of each tress species was mixed in soil with two doses @ 100 and 200 g of leaves of each species per pot. Higher shoot length, shoot dry weight, number of spikelets per spike and biological yield were recorded in 200 g sun dried Jaman (Syzygium cumini) leaves. Total number of tillers per plant and number of ears per plant were higher under the application of Eucalyptus camaldulensis leaves (200 g sun dried) as compared to other treatments. Spike length, grain yield per pot, number of grains per pot and harvest index were maximum in 200 g sun-dried Sacred fig (Ficu sreligiosa) leaves. Majority of the parameters were promoted at lower doses of leaves per pot, however, at higher doses they started inhibiting the growth and grain yield of wheat.


1935 ◽  
Vol 72 (8) ◽  
pp. 377-380 ◽  
Author(s):  
P. R. Thompson

Consideration of the continental areas over which the sea spread at various times during the course of geological history leads to the impression that perhaps every part of the land surface of the earth was, at one time or another, raised from a position below sea-level. The present land surface seems to have grown around ancient nuclei owing to the compression of the granitic, sedimentary, and other rocks of which the continental layers are composed. At certain times the compressive forces acted so strongly upon these rocks that the average height of the land reached maximum values, which might have been as great as 3,000 feet. Then denudation, and perhaps other processes, coming into operation and persisting through ages of comparative quiescence, lowered the surface, sometimes to minimum average levels, which might have been as low as 500 feet. There have been a few comparatively short periods of exceptionally high relief, separated by longer periods of low relief. Assuming that the land was raised by horizontal compression, the diminution in surface area of the earth necessary to produce a change in level of 2,500 feet would be very considerable. Instead of considering the change from a minimum average height of 500 feet to a maximum of 3,000 feet, it may be more convenient in the first place to consider the elevation of, say, the continental layers of Dr. H. Jeffreys from sea-level to the average height of the present land surface, that is about 2,500 feet, or 762 metres. It will be supposed, then, that the continental layers, as they now exist, were developed from layers consisting of 1 km. of sediments of specific gravity 2·4, 10 km. of granite of specific gravity 2·6, and 20 km. of tachylyte of specific gravity 2·9, the whole resting on dunite of specific gravity 3·3.


2017 ◽  
Vol 26 (12) ◽  
pp. 1030 ◽  
Author(s):  
Andrew H. Lybbert ◽  
Justin Taylor ◽  
Alysa DeFranco ◽  
Samuel B. St Clair

Wildfire can drastically affect plant sexual reproductive success in plant–pollinator systems. We assessed plant reproductive success of wind, generalist and specialist pollinated plant species along paired unburned, burned-edge and burned-interior locations of large wildfires in the Mojave Desert. Flower production of wind and generalist pollinated plants was greater in burned landscapes than adjacent unburned areas, whereas specialist species responses were more neutral. Fruit production of generalist species was greater in burned landscapes than in unburned areas, whereas fruit production of wind- and specialist-pollinated species showed no difference in burned and unburned landscapes. Plants surviving in wildfire-disturbed landscapes did not show evidence of pollination failure, as measured by fruit set and seed:ovule ratios. Generalist- and specialist-plant species established in the interior of burned landscapes showed no difference in fruit production than plants established on burned edges suggesting that pollination services are conserved with increasing distance from fire boundaries in burned desert landscapes. Stimulation of plant reproduction in burned environments due to competition release may contribute to the maintenance of pollinator services and re-establishment of the native plant community in post-fire desert environments.


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