scholarly journals SELEKSI POHON TEDUHAN UNTUK RAIN GARDEN

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Nova Annisa

Penelitian ini bertujuan untuk mengetahui jenis pohon yang sesuai untuk rain garden, jumlah stomata, proporsi penutupan kanopi dan kandungan air dalam daun dari beberapa jenis pohon teduhan, serta hubungan antara jumlah stomata daun dengan luas daun, jika terdapat faktor proporsi kandungan air yang diduga mempengaruhi akan dikendalikan. Data yang diperoleh di analisis  proporsi kandungan air dalam daun, proporsi penutupan kanopi, dan jumlah stomata dengan menggunakan analisis deskriptif. Untuk mengetahui hubungan antara luas daun, proporsi penutupan kanopi dan kandungan air dalam daun pada pohon teduhan digunakan analisis korelasi parsial dengan bantuan SPSS versi 17. Berdasarkan hasil penelitian terhadap kerapatan stomata dalam ukuran  1cm², diperolehlah 10 jenis pohon teduhan tertinggi seperti Psidium guajava (jambu biji), Mangifera casturi (kasturi), Hevea brasiliensis  (karet), Pithecellobium lobatum (jengkol), Mangifera indica (mangga), Theobroma cacao (coklat), Persea americana (alpukat), Eugenia aquea (jambu air), Gnetum gnemon (melinjo), dan Arthocarpus heterophyllus (nangka). Kerapatan stomata daun tidak berhubungan terhadap luas daun pada pohon teduhan. Kata kunci: pohon teduhan rain garden, stomata. This study aims to determine the type of tree suitable for rain garden, number of stomata, the proportion of canopy closure and water content in the leaves of several types of shade trees, and the relationship between the number of leaf stomata to leaf area, if there is a proportion factor thought to affect the water content will be controlled. Data obtained in the analysis of the proportion of water content in the leaves, the proportion of canopy closure, the location of the tree, and the number of stomata by using descriptive analysis. To determine the relationship between leaf area, the proportion of canopy closure and water content in the leaves of the shade trees used partial correlation analysis with SPSS version 17. Based on the results of a study of the density of stomata in the size of 1 cm², found 10 species of trees shade the best such as Psidium guajava (guava), Mangifera casturi (kasturi), Hevea brasiliensis (rubber), Pithecellobium lobatum (jengkol), Mangifera indica (mango), Theobroma cacao (brown), Persea americana (avocado), Eugenia aquea (rose apple), Gnetum gnemon (melinjo), and Arthocarpus heterophyllus (jackfruit). The density of leaf stomata are not related to the broad leaves of the shade tree. Keywords: rain garden, shade tree, stomata.

2020 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Ani Fitriyani ◽  
Melya Riniarti ◽  
Duryat Duryat

ABSTRAK Hutan Desa Sukaraja merupakan hutan lindung yang dimanfaatkan oleh masyarakat melalui pengelolaan dengan sistem agroforestri dan pemungutan hasil hutan bukan kayu untuk meningkatkan kesejahteraan masyarakat. Penelitian ini bertujuan untuk memperoleh data mengenai jenis dan jumlah HHBK dari tanaman MPTs serta menduga potensi HHBK dari tanaman MPTs pada masa yang akan datang berdasarkan ketersediaannya di masa kini. Data dikumpulkan melalui analisis vegetasi pada 29 plot contoh yang diambil berdasarkan metode SRS (Simple Random Sampling). Untuk memprediksi penambahan jumlah MPTs 1 sampai 4 tahun yang akan datang dilakukan pengamatan pohon pada fase tiang dan pancang. Hasil penelitian menunjukkan terdapat 11 jenis tanaman MPTs yang dimanfaatkan hasil hutan bukan kayunya oleh masyarakat Desa Sukaraja yaitu durian, cengkeh, pala, petai, alpukat, kemiri, mangga, nangka, jengkol, melinjo dan duku. Hasil penelitian menunjukkan bahwa hingga beberapa tahun yang akan datang pohon cengkeh dan durian masih menjadi MPTs yang paling banyak dimanfaatkan dan ditanam oleh masyarakat. Sedangkan mangga dan kemiri merupakan HHBK yang produksinya akan stagnan atau bahkan mengalami penurunan dalam kurun waktu 1-4 tahun yang akan datang. Kata Kunci : HHBK, MPTs, Hutan Desa, KHP Rajabasa  ABSTRACT Sukaraja Village Forest is a protected forest that is utilized by the community through agroforestry system and collection of non-timber forest products to improved community welfare. This study aimed to obtain data on the types and numbers of NTFPs from MPTs and to estimate the potential of NTFPs from MPTs in the future based on their availability in the present. Data was collected through vegetation analysis with 29 sample plots taken based on the SRS (Simple Random Sampling) method. To predict the increase of amount of MPTs in 1-4 years, observed of trees in the pole and sapling phases. The results showed that there were 11 types of MPTs that were utilized by non-timber forest products by the people of Sukaraja Village, that were Durio Zibethinus, Eugenis aromaticum, Phitecellobium lobatum, Parkia spesiosa, myristica fragnans, Artocarpus heterophyllus, Lansium domesticum, Persea americana, Alueuritas moluccanus, Gnetum gnemon and Mangifera indica. The results showed that for the next few years Eugenia aromaticum and Durio zibethinus trees were still the most widely used and planted by the community. While production of Mangifera indica and Alleurites moluccanus were the NTFPs that will be stagnate or even decline in the next 1-4 years. Keywords : NTFPs, MPTs, Village Forest, KPH Rajabasa


2020 ◽  
Vol 7 (2) ◽  
pp. 77-82
Author(s):  
Dominggus De Lima ◽  
J. S. A. Lamerkabel ◽  
Inggrid Welerubun

The aim of this research was to determine the kinds of pollen producer plants, its population density and the number of cells contained bee bread (pollen) at bee nest. The observed variables were kinds of plants in general and its density, pollen producer plants, number of cells contained bee breed (pollen). Method used was survey techniques which conducted in four bee farms. The farms were naturally rich of some flowering plants such as Cambodia, asoka, bougainville; and some horticulture plants such as coconut Cocos mufifera), nutmeg (Myristisca frogranas houtt), palm (Arenga pinnata) ,cacao (Theobroma cacao), clove (Syzygiumaromatioum); some fruits plants such as guava(Psidium guajava), nut guava(Arnacidium occidentale), ambutan(Nephelium lappaceum), mango(mangifera indica), banana(Musa paradisiacal), langsat(Lansium domesticium). From the four bee farms chosen, there was revealed that Dusun Kawatu has the highest plant density, followed by respectively Negeri Hatusua, Negeri Waehatu and Negeri Kamarian. Also, Dusun Kawatu has more pollen producer plant varieties in comparison to the other three Negeri/ Dusun(s). However, bee farm in Negeri Kamarian has more number of cell contained pollen than other farms; followed respectively by bee farms in Negeri hatusua, Dusun Kawatu and Negeri Waehatu.


2004 ◽  
Vol 61 (6) ◽  
pp. 655-658 ◽  
Author(s):  
Bárbara Teruel ◽  
Theo Kieckbusch ◽  
Luis Cortez

The cooling of fruits and vegetables in hydrocooling system can be a suitable technique. This work aimed to define cooling time for fruits and vegetables of different sizes, presenting practical indexes that could be used to estimate cooling time for produce with similar characteristics. Fruits (orange melon-Cucumis melo, mango-Mangifera indica, guava-Psidium guajava, orange-Citrus sinensis Osbeck, plum-Prunus domestica, lime-Citrus limon, and acerola-Prunus cerasus) and vegetables (cucumber-Cucumis sativus, carrot-Daucus carota, and green bean-Phaseolus vulgaris), were cooled in a hydrocooling system at 1°C. The volume of fruits and vegetables ranged between 8.18 cm³ and 1,150.35 cm³, and between 13.06 cm³ and 438.4 cm³, respectively. Cooling time varied proportionally to produce volume (from 8.5 to 124 min for fruits, and from 1.5 to 55 min, for vegetables). The relationship between volume and time needed to cool fruits (from 1.03 min cm-3 to 0.107 min cm-3) and vegetables (from 0.06 min cm-3 to 0.12 min cm-3) is an index that could be used to estimate cooling time for fruits and vegetables with similar dimensions as those presented in this work.


2006 ◽  
Vol 30 (6) ◽  
pp. 1099-1105 ◽  
Author(s):  
Fernando Luíz de Oliveira Corrêa ◽  
José Darlan Ramos ◽  
Antônio Carlos da Gama-Rodrigues ◽  
Manfred Willer Müller

Objetivou-se com este trabalho avaliar a produção de serapilheira em diferentes coberturas frutíferas e florestais componentes de um sistema agroflorestal multiestratificado localizado no município de Ouro Preto do Oeste, RO, Brasil. As espécies avaliadas foram: mangueira (Mangifera indica L.), fruta-pão (Artocarpus altilis (Parkinson) Fosberg), cupuaçuzeiro (Theobroma grandiflorum Schum), abacateiro (Persea americana Mill.), cacaueiro (Theobroma cacao L.) sombreado com gliricídia (Gliricidia sepium (Jacq.) Walp.) e as espécies florestais, a bandarra (Schizolobium amazonicum Huber ex Ducke) e a teca (Tectona grandis L.f.). Como referência foi utilizada uma área de vegetação natural (capoeira), de 8 anos de idade. A deposição anual de serapilheira entre o período de outubro de 2002 e setembro de 2003 foi de 13,38 t ha-1 para a vegetação natural, 4,02 t ha-1 para bandarra, 3,43 t ha-1 para gliricídia, 2,86 t ha-1para abacateiro, 2,54 t ha-1 para fruta-pão, 1,40 t ha-1 para o cupuaçuzeiro, 1,16 t ha-1 para o cacaueiro, 1,12 t ha-1 para mangueira e 1,07 t ha-1 para a teca. A vegetação natural, a bandarra e o cacaueiro apresentaram uma maior deposição no período seco (verão), enquanto que a fruta-pão, cupuaçuzeiro, mangueira, teca, gliricídia e abacateiro as maiores deposições foram no período chuvoso (inverno). Por outro lado a serapilheira acumulada sobre o solo foi de 14,61 t ha-1 na mangueira, 12,8 t ha-1 na bandarra, 12,73 t ha-1 na vegetação natural, 12,04 t ha-1, no abacateiro, 9,87 t ha-1 no cacaueiro/gliricídia, 9,88 t ha-1 no cupuaçuzeiro, 9,05 t ha-1 na fruta-pão e 7,39 t ha-1 na teca.


Author(s):  
Claudia Mercedes Ordoñez ◽  
J. Orlando Rangel-Ch

Con base en la composición florística y en aspectos de la estructura (área basal y número de individuos), se caracterizó la vegetación en sistemas agroforestales (SAF) ubicados en 47 plantaciones con cacao (Theobroma cacao) en el departamento del Huila, Colombia. La vegetación en dichos sistemas estaba dominada por las especies Pseudosamanea guachapele, Musa paradisiaca, Erythrina poeppigiana, Gmelina arborea, Psidium guajava, Manguifera indica y Cordia alliodora. Las especies  aracterísticas-dominantes a nivel regional fueron Gliricidia sepium, Cordia alliodora, Amyris pinnata y Persea americana. Los sistemas agroforestales con mayor riqueza fueron el de Pseudosamanea guachapele, con 36 especies y el de Musa paradisiaca, con 25. La altura de los individuos oscilaba entre 3 y 21 m, y el mayor valor se presentó en el sistema de P. guachapele; el área basal fue 64,30 m2, los mayores valores se registraron en los sistemas agroforestales de P. guachapele, con 16.41 m2 y en el de E. poeppigiana, con 18,03 m2. La participación de T. cacao a nivel regional en el área basal es de 56,63 m2 y el número total de individuos es de 4.808. En los sitios con exposición libre (cultivo limpio en 11.000 m2) la altura promedio de los individuos de cacao era de 3,5 m, el área basal, de 15,31 m2, con 1.101 individuos. Esta cantidad es casi igual a la que se encontraría en un área de igual extensión en el sistema agroforestal bajo sombra de P. guachapele (1.386 individuos) y cinco veces mayor que aquel con presencia de todas las especies asociadas pero sin T. cacao (217 individuos). Aparte de la cosecha de cacao, estos sistemas ofrecen madera, frutos y leña, y proveen servicios ecosistémicos relacionados con la protección del suelo y la conservación de la biodiversidad.


Author(s):  
B. C. Sutton

Abstract A description is provided for Colletotrichum musae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Musa spp. (banana), M. textilis and other species of Musa. Also on Malus pumila, Mangifera indica, Persea americana, Psidium guajava and Vigna sp. (by inoculation; 4: 103; 42: 268). DISEASES: Anthracnose, ripe fruit rot, finger stalk and main stalk rot, black rot of banana; leaf spot of abaca seedlings. Chiefly known as a cause of wastage of bananas in storage. The pathogen attacks immature fruit in the field and is also present as invisible latent infections in very young fruit. Leaves, transition leaves, bracts and flowers are also attacked. GEOGRAPHICAL DISTRIBUTION: Widespread on banana. TRANSMISSION: By wind-bome conidia and possibly by ants and other insects (2: 280). Conidia remain viable in acervuli in the field for long periods, tolerating extremes of temperature (up to 45°C) and fluctuations in relative humidity (32-83%) (45, 160).


2010 ◽  
Vol 20 (1) ◽  
pp. 111-119 ◽  
Author(s):  
Jeffrey G. Williamson ◽  
Jonathan H. Crane

A wide variety of temperate, subtropical, and tropical fruit crops are grown commercially in Florida. Farm size ranges from large commercial operations exceeding 100 acres to small 1- or 2-acre “estate” farms. Irrigation and fertilization practices vary widely with crop, soil type, and management philosophy. However, many growers are adopting practices such as microirrigation, fertigation, and other technologies, which, if properly used, should reduce water and fertilizer inputs and minimize leaching and runoff of fertilizers and pesticides. Although fertilizer and irrigation recommendations exist for major crops such as avocado (Persea americana), mango (Mangifera indica), and blueberry (Vaccinium spp.), there is little research-based information specific to Florida for many minor crops, including muscadine (Vitis rodundifolia), blackberry (Rubus spp.), sapodilla (Manilkara zapota), guava (Psidium guajava), papaya (Carica papaya), and others. Even where recommendations exist, refinement of irrigation and fertilization practices is needed because of changes in technology.


2005 ◽  
Vol 30 (5) ◽  
pp. 543-545 ◽  
Author(s):  
Francisco A Ferreira ◽  
Luis A Maffia ◽  
Evander A Ferreira

Desenvolveu-se uma técnica de detecção rápida de Ceratocystis fimbriata em lenho de eucalipto (Eucalyptus spp.) infetado, visualizando-se clamidósporos (aleuroconídios) ao microscópio ótico comum, em vasos do xilema, medula e raios medulares, a partir de cortes histopatológicos à mão livre, feitos com lâmina de barbear, ao microscópio estereoscópico. O tempo médio gasto para a detecção do patógeno, do corte histopatológico tangencial à total visualização dos clamidósporos ao microscópio ótico comum, foi de 3,5 min e bem menos utilizando-se corte longitudinal passando pela medula, contra, no mínimo, quatro a cinco dias, usando-se outras técnicas como o isolamento em BDA, deposição de fragmentos de lenho doente entre fatias de cenoura usadas como isca, ou pedaços de lenhos doentes deixados em câmara úmida. Essa técnica histopatológica é também viável para a detecção do patógeno em outros hospedeiros lenhosos e, inclusive, para a detecção de hifas de Lasiodiplodia theobromae, mesmo quando esses dois fungos estavam num mesmo tecido, como na doença-complexo seca de mangueira investigada no Sultanato de Omã. Além de eucalipto, mangueira (Mangifera indica) e cacaueiro (Theobroma cacao) é provável que essa técnica possa ser estendida para outros hospedeiros lenhosos de C. fimbriata.


1979 ◽  
Vol 57 (19) ◽  
pp. 1994-1998 ◽  
Author(s):  
Peter L. Tobiessen ◽  
Nancy G. Slack ◽  
Keith A. Mott

The response of photosynthesis and respiration to drying was measured in four species of epiphytic mosses, Ulota crispa (Hedw.) Brid., Neckera pennata Hedw., Anomodon rugellii (C. Mull.) Keissl., and Plagiomnium cuspidatum (Hedw.) T. Kop., from habitats along a desiccation gradient. There was little difference among the mosses in these responses. The relationship of water content to water potential did differ among the mosses, with Plagiomnium, the facultative epiphyte, showing a typical response of more mesic species and the other three showing a more xeric response, i.e., water potential does not begin to fall steeply until a lower water content is reached in Ulota, Neckera, and Anomodon. Both photosynthesis and respiration in all four moss species were quite sensitive to moderate water stress.


2015 ◽  
Vol 52 (3) ◽  
pp. 359-370
Author(s):  
ADRIAN KOLLER ◽  
GUILHERME TORRES ◽  
MICHAEL BUSER ◽  
RANDY TAYLOR ◽  
BILL RAUN ◽  
...  

SUMMARYHand-planted plots of across-row-oriented corn seeds (Zeamays L.) produce highly structured leaf canopies and have shown significant yield advantage over randomly planted plots in prior studies. For further investigation of the phenomenon by simulation, the objective of this study was to develop a probabilistic model for the correlation between seed orientation and initial plant orientation. In greenhouse trials, the azimuthal orientation of kernels of four different hybrids was recorded at planting. At collar setting of the seed leaf, the orientation of the seed leaf was determined and the angular data subjected to the analytical methods of circular statistics. The results indicate that the correlation between seed azimuth and seed leaf azimuth can be described by a von Mises distribution. The probabilistic seed to seed leaf azimuth model described herein may be implemented in simulation models to investigate the effect of canopy architecture, canopy closure and light interception efficiency of corn under conditions of seed oriented planting.


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