Rejuvenating indigenous trees in agroforestry parkland systems for better fruit production using crown pruning

2007 ◽  
Vol 72 (3) ◽  
pp. 187-194 ◽  
Author(s):  
Jules Bayala ◽  
Sibiri Jean Ouedraogo ◽  
Zewge Teklehaimanot
Keyword(s):  
Fruit Production ◽  
Agroforestry Parkland ◽  
Indigenous Trees ◽  
Parkland Systems

Facteurs socio-économiques influençant la biodiversité ligneuse des parcs agroforestiers de deux villages du plateau central du Burkina Faso | Influence of socioeconomic factors on the biodiversity of woody species in agroforestry parkland systems: A case study in two villages in the central plateau of Burkina Faso

2006 ◽  
Vol 157 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Christoph Abegg ◽  
Jules Bayala ◽  
Mamounata Belem ◽  
Antoine Kalinganire
Keyword(s):  
Land Use ◽  
Burkina Faso ◽  
Woody Species ◽  
Central Plateau ◽  
Agroforestry Parkland ◽  
Plateau Central ◽  
Parkland Systems ◽  
The Village ◽  
Participatory Analysis

Agroforestry parklands face strong pressure from the increasing population of the region. The World Agroforestry Centre (ICRAF Sahel) started a biodiversity project with the objective of developing methods to conserve biodiversity and to improve the situation of the poor rural population. In this context the present study examined the influence of land use unit and the prosperity classes of farmers on the biodiversity of woody species. A wealth ranking classification was carried out and applied to the households of two villages in the central plateau of Burkina Faso using the "Participatory Analysis of Poverty and Livelihood Dynamics" (PAPoLD) method. Thirty farmers of different prosperity classes were chosen and inventories carried out on their different land use units. Statistical analyses show an increase in biodiversity from the village housings. However, no significant influence on biodiversity was observed in connection with a farmer's prosperity class.

PHOTOSYNTHESIS AND BIOMASS PRODUCTION BY MILLET (PENNISETUM GLAUCUM) AND TARO (COLOCASIA ESCULENTA) GROWN UNDER BAOBAB (ADANSONIA DIGITATA)AND NÉRÉ (PARKIA BIGLOBOSA) IN AN AGROFORESTRY PARKLAND SYSTEM OF BURKINA FASO (WEST AFRICA)

2012 ◽  
Vol 48 (2) ◽  
pp. 283-300 ◽  
Author(s):  
JOSIAS SANOU ◽  
JULES BAYALA ◽  
PAULIN BAZIÉ ◽  
ZEWGE TEKLEHAIMANOT
Keyword(s):  
Burkina Faso ◽  
Open Field ◽  
Biomass Production ◽  
Pennisetum Glaucum ◽  
Tree Trunk ◽  
Open Area ◽  
Parkia Biglobosa ◽  
Adansonia Digitata ◽  
Agroforestry Parkland ◽  
Parkland Systems

SUMMARYPhotosynthesis and biomass production by millet (Pennisetum glaucum) and taro (Colocasia esculenta) grown under baobab (Adansonia digitata) and néré (Parkia biglobosa) was studied at Nobéré (Burkina Faso) with the aim of optimising parkland systems productivity. Millet yielded the highest biomass under Baobab and the lowest biomass was recorded in the zone close to the tree trunk of néré. In contrast, the biomass of taro was higher in heavy shaded zones under néré and the zone close to baobab's trunk. The two crops showed an increasing trend of photosynthesis rate (PN) from tree trunk to the open area. However, the increase in thePNof taro from tree trunk to the open field was lower compared to that of millet. By increasing its leaf area index (LAI) under shade, taro displayed higher biomass production under tree compared to the open area while an opposite trend was observed in millet. The high millet biomass production under baobab could be explained by light availability and the reduction of temperature under shade compared to the open field. The adaptation of taro to shade by increasing its LAI and thus avoiding drastic reduction inPNunder shade resulted in better biomass production under heavy shade. Therefore, it was concluded that by replacing millet with taro under dense tree crowns the productivity of agroforestry parkland systems could be increased.

Klasifikasi Tahap Kematangan Pisang Ambon Berdasarkan Warna Menggunakan Naive Bayes

2018 ◽  
Vol 5 (2) ◽  
pp. 60-67 ◽  
Author(s):  
Dwi Yulianto ◽  
Retno Nugroho Whidhiasih ◽  
Maimunah Maimunah
Keyword(s):  
Naive Bayes ◽  
Fruit Production ◽  
Naïve Bayes ◽  
Primary Data ◽  
Banana Fruit ◽  
Bayes Method ◽  
Classification Image ◽  
Average Accuracy ◽  
The Government

ABSTRACT   Banana fruit is a commodity that contributes a great value to both national and international fruit production achievement. The government through the National Standardization Agency establishes standards to maintain the quality of bananas. The purpose of this Project is to classify the stages of maturity of Ambon banana base on the color index using Naïve Bayes method in accordance with the regulations of SNI 7422:2009. Naive Bayes is used as a method in the classification process by comparing the probability values generated from the variable value of each model to determine the stage of Ambon banana maturity. The data used is the primary data image of 105 pieces of Ambon banana. By using 3 models which consists of different variables obtained the same greatest average accuracy by using the 2nd model which has 9 variable values (r, g, b, v, * a, * b, entropy, energy, and homogeneity) and the 3rd model has 7 variable values (r, g, b, v , * a, entropy and homogeneity) that is 90.48%.   Keywords: banana maturity, classification, image processing     ABSTRAK   Buah pisang merupakan komoditas yang memberikan kontribusi besar terhadap angka produksi buah nasional maupun internasional. Pemerintah melalui Badan Standarisasi Nasional menetapkan standar untuk buah pisang, menjaga mutu  buah pisang. Tujuan dari penelitian ini adalah klasifikasi tahapan kematangan dari buah pisang ambon berdasarkan indeks warna menggunakan metode Naïve Bayes  sesuai dengan SNI 7422:2009. Naive bayes digunakan sebagai metode dalam proses pengklasifikasian dengan cara membandingkan nilai probabilitas yang dihasilkan dari nilai variabel penduga setiap model untuk menentukan tahap kematangan pisang ambon. Data yang digunakan adalah data primer citra pisang ambon sebanyak 105. Dengan menggunakan 3 buah model yang terdiri dari variabel penduga yang berbeda didapatkan akurasi rata-rata terbesar yang sama yaitu dengan menggunakan model ke-2 yang mempunyai 9 nilai variabel (r, g, b, v, *a, *b, entropi, energi, dan homogenitas) dan model ke-3 yang mempunyai 7 nilai variabel (r, g, b, v, *a, entropi dan homogenitas) yaitu sebesar 90.48%.   Kata Kunci : kematangan pisang,  klasifikasi, pengolahan citra

Orchestrated Flowering and Interspecific Facilitation: Key Factors in the Maintenance of the Main Pollinator of Coexisting Threatened Species of Andean Wax Palms (Ceroxylon spp.)

2020 ◽  
Vol 105 (3) ◽  
pp. 281-299
Author(s):  
Javier Carreño-Barrera ◽  
Luis Alberto Núñez-Avellaneda ◽  
Maria José Sanín ◽  
Artur Campos D. Maia
Keyword(s):  
Conservation Status ◽  
Population Decline ◽  
Floral Biology ◽  
Fruit Production ◽  
Biological Data ◽  
Fruit Yield ◽  
Insect Species ◽  
Individual Species ◽  
Pollination Services ◽  
Flower Visiting

Solitary, dioecious, and mostly endemic to Andean cloud forests, wax palms (Ceroxylon Bonpl. ex DC. spp.) are currently under worrisome conservation status. The establishment of management plans for their dwindling populations rely on detailed biological data, including their reproductive ecology. As in the case of numerous other Neotropical palm taxa, small beetles are assumed to be selective pollinators of wax palms, but their identity and relevance in successful fruit yield were unknown. During three consecutive reproductive seasons we collected data on population phenology and reproductive and floral biology of three syntopic species of wax palms native to the Colombian Andes. We also determined the composition of the associated flower-visiting entomofauna, quantifying the extent of the role of individual species as effective pollinators through standardized value indexes that take into consideration abundance, constancy, and pollen transport efficiency. The studied populations of C. parvifrons (Engel) H. Wendl., C. ventricosum Burret, and C. vogelianum (Engel) H. Wendl. exhibit seasonal reproductive cycles with marked temporal patterns of flower and fruit production. The composition of the associated flower-visiting entomofauna, comprised by ca. 50 morphotypes, was constant across flowering seasons and differed only marginally among species. Nonetheless, a fraction of the insect species associated with pistillate inflorescences actually carried pollen, and calculated pollinator importance indexes demonstrated that one insect species alone, Mystrops rotundula Sharp, accounted for 94%–99% of the effective pollination services for all three species of wax palms. The sequential asynchronous flowering of C. parvifrons, C. ventricosum, and C. vogelianum provides an abundant and constant supply of pollen, pivotal for the maintenance of large populations of their shared pollinators, a cooperative strategy proven effective by high fruit yield rates (up to 79%). Reproductive success might be compromised for all species by the population decline of one of them, as it would tamper with the temporal orchestration of pollen offer.

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