scholarly journals Yield and crop cycle time of peaches cultivated in subtropical climates and subjected to different pruning times

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4099
Author(s):  
Rafael Augusto Ferraz ◽  
Sarita Leonel ◽  
Daniela Mota Segantini ◽  
Marco Antonio Tecchio ◽  
Luis Eduardo Correa Antunes
Keyword(s):  
Experimental Design ◽  
Fruit Set ◽  
Climate Adaptation ◽  
Fruit Production ◽  
Agronomic Performance ◽  
Crop Cycle ◽  
Four Blocks ◽  
June July ◽  
Peach Trees ◽  
Plot Design

The cultivation of peaches in regions of subtropical and tropical climate is currently achieved through a set of practices such as using less demanding cultivars in cold conditions, applying plant growth regulators to break dormancy, and performing specific pruning, like production and renewal pruning. Research on the climate adaptation of cultivars is of great importance in establishing a crop in a given region. Therefore, the objective of this study was to evaluate the agronomic performance of three cultivars subjected to different production pruning times in Botucatu/SP, where 2-year old peach trees were evaluated, grown at a spacing of 6.0 x 4.0 meters. The experimental design was a split plot design with four blocks, using the cultivars Douradão, BRS Kampai and BRS Rubimel, and the subplots corresponded to pruning times in May, June, July and August. Ten plants were used per plot, with the four central plants considered useful and the remaining considered as margins. Pruning in June and July showed the best results in terms of percentage of fruit set and production. The cultivar BRS Rubimel showed the best percentage of fruit set when pruned in June (44.96%), and best fruit production when pruned in July (18.7 kg plant-1). Pruning in May anticipated the harvest of cultivar BRS Rubimel by 13 days whereas pruning carried out in July and August provided late harvests for cultivars Douradão and BRS Kampai.

scholarly journals Yield and crop cycle time of peaches cultivated in subtropical climates and subjected to different pruning times

2015 ◽  
Vol 36 (6Supl2) ◽  
pp. 4099
Author(s):  
Rafael Augusto Ferraz ◽  
Sarita Leonel ◽  
Daniela Mota Segantini ◽  
Marco Antonio Tecchio ◽  
Luis Eduardo Correa Antunes
Keyword(s):  
Experimental Design ◽  
Fruit Set ◽  
Climate Adaptation ◽  
Fruit Production ◽  
Agronomic Performance ◽  
Crop Cycle ◽  
Four Blocks ◽  
June July ◽  
Peach Trees ◽  
Plot Design

<p>The cultivation of peaches in regions of subtropical and tropical climate is currently achieved through a set of practices such as using less demanding cultivars in cold conditions, applying plant growth regulators to break dormancy, and performing specific pruning, like production and renewal pruning. Research on the climate adaptation of cultivars is of great importance in establishing a crop in a given region. Therefore, the objective of this study was to evaluate the agronomic performance of three cultivars subjected to different production pruning times in Botucatu/SP, where 2-year old peach trees were evaluated, grown at a spacing of 6.0 x 4.0 meters. The experimental design was a split plot design with four blocks, using the cultivars Douradão, BRS Kampai and BRS Rubimel, and the subplots corresponded to pruning times in May, June, July and August. Ten plants were used per plot, with the four central plants considered useful and the remaining considered as margins. Pruning in June and July showed the best results in terms of percentage of fruit set and production. The cultivar BRS Rubimel showed the best percentage of fruit set when pruned in June (44.96%), and best fruit production when pruned in July (18.7 kg plant-1). Pruning in May anticipated the harvest of cultivar BRS Rubimel by 13 days whereas pruning carried out in July and August provided late harvests for cultivars Douradão and BRS Kampai.</p>

scholarly journals Phenology and fruit set of peach trees cultivated in Dois Vizinhos, Paraná State, Brazil

2022 ◽  
Vol 43 (1) ◽  
pp. 25-36
Author(s):  
Claudia Regina Barbieri ◽  
◽  
Gilmar Antônio Nava ◽  
Keyword(s):  
Fruit Set ◽  
Cultural Practices ◽  
Fruit Production ◽  
Flower Buds ◽  
Fruit Thinning ◽  
Temperature Requirements ◽  
Fruit Growing ◽  
Improvement Programs ◽  
Peach Trees ◽  
Flowering Intensity

Understanding the dormancy phases and dynamics of commercial cultivars in the regions where they are grown allows for the implementation of different cultural practices and aids in the understanding of the temperature requirements for collaboration with genetic improvement programs. The objective of this study was to determine the budding, flowering, and fruit set rates of peach trees cultivated in the municipality of Dois Vizinhos, Southwestern Paraná, Brazil. The present work was developed using the collection of peach trees in the fruit growing sector of the Universidade Tecnológica Federal do Paraná. Sixteen peach cultivars were evaluated: Rubimel, Leonense, Coral, Marli, Charme, Riograndense, Douradão, Chimarrita, Granada, BR-1, Bonão, and Eldorado (all planted in 2009), as well as Regalo, Kampai, Fascínio, and Zilli (planted in 2014). The experimental design was completely randomized with four replications of one plant each, in a 16 × 2 bifactorial arrangement (cultivars × year/harvest). Phenology evaluations were performed weekly by counting open (anthesis) and sprouted flower buds, and the fruit set rate was measured just before fruit thinning. Flowering (%), budding (%), and fruit set (%) rates were calculated. It was found that the year/harvest 2016 promoted the highest rates of sprouting and fruit set. The Bonão cultivar showed greater flowering intensity and regularity in the crop years evaluated (2016 and 2017). Coral and Kampai present fruit sets with greater intensities and regularities when compared to the other cultivars evaluated under the climatic condition of the municipality of Dois Vizinhos. The Riograndense cultivar showed greater irregularity in flowering and fruit production.

Reproductive Responses of Capsicum annuum to High Temperatures

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 543c-543
Author(s):  
Ami N. Erickson ◽  
Albert H. Markhart
Keyword(s):  
Capsicum Annuum ◽  
High Temperatures ◽  
Fruit Development ◽  
Flower Development ◽  
Fruit Set ◽  
Fruit Production ◽  
Yield Reduction ◽  
Bud Size ◽  
Growth Chambers ◽  
Constant Growth

Fruit yield reduction due to high temperatures has been widely observed in Solanaceous crops. Our past experiments have demonstrated that Capsicum annuum cultivars Ace and Bell Boy completely fail to produce fruit when grown at constant 33 °C. However, flowers are produced, continually. To determine which stages of flower development are sensitive to high temperatures, pepper buds, ranging in size from 1 mm to anthesis, were exposed to high temperatures for 6 hr, 48 hr, 5 days, or for the duration of the experiment. Fruit set for each bud size was determined. Exposure to high temperatures at anthesis and at the 2-mm size stage for 2 or more days significantly reduced fruit production. To determine whether inhibition of pollination, inhibition of fertilization, and/or injury to the female or male structures prevents fruit production at high temperatures, flowers from pepper cultivars Ace and Bell Boy were grown until flowers on the 8th or 9th node were 11 mm in length. Plants were divided between 25 °C and 33 °C constant growth chambers for 2 to 4 days until anthesis. At anthesis, flowers from both treatments were cross-pollinated in all combination, and crosses were equally divided between 33 or 25 °C growth chambers until fruit set or flowers abscised. All flower crosses resulted in 80% to 100% fruit set when post-pollination temperatures were 25 °C. However, post-pollination temperatures of 33 °C significantly reduced fruit production. Reduced fruit set by flowers exposed to high temperatures during anthesis and pollination is not a result of inviable pollen or ovule, but an inhibition of fertilization or initial fruit development.

scholarly journals Yield of gherkin in response to doses of bovine manure

2009 ◽  
Vol 27 (1) ◽  
pp. 100-102 ◽  
Author(s):  
Arnaldo Nonato P de Oliveira ◽  
Ademar P de Oliveira ◽  
Francisco de Assis P Leonardo ◽  
Iordam da S Cruz ◽  
Damiana F da Silva
Keyword(s):  
Experimental Design ◽  
Fruit Production ◽  
Fruit Yield ◽  
Northeastern Brazil ◽  
Experimental Plot

Considering the importance of gherkin in Northeastern Brazil, studies focusing on increasing its quality and yield are powerful tools to improve people social and economical condition in this region. The effects of doses of bovine manure were evaluated in gherkin yield in an experiment using cultivar Nordestino, from May to September 2006, at the Federal University of Paraíba, in Areia County, Paraíba State, Brazil. The experimental design was randomized complete blocks, with five treatments (0; 10; 20; 30, and 40 t ha-1) of bovine manure, in four replications. The working area in each experimental plot corresponded to 80 m², including 20 plants, with 2.0 x 2.0 m spaces. The highest number of fruits per plant (30) was achieved with 32.2 t ha-1 of bovine manure. Both fruit production per plant and fruit yield increased with doses of bovine manure, with maximum values of respectively 1,306 g and 19.5 t ha-1, when 40 t ha-1 of bovine manure were used.

scholarly journals DESEMPENHO DO TOMATEIRO EM SISTEMA DE TUTORAMENTO VERTICAL EM ESPIRAL CONDUZIDO COM UMA OU DUAS HASTES

Nativa ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 338
Author(s):  
Juniomar Schmidt ◽  
Caroline Merlo Meneghelli ◽  
Marcelo Rodrigo Krause ◽  
Marcos Vinícius Hell ◽  
Milson Lopes de Oliveira ◽  
...  
Keyword(s):  
Experimental Design ◽  
Lycopersicon Esculentum ◽  
Fruit Production ◽  
Size Class ◽  
Indeterminate Growth ◽  
Driving System ◽  
Lycopersicon Esculentum Mill ◽  
Net Revenue ◽  
The Cost ◽  
Fruit Diameter

O objetivo deste trabalho foi avaliar a viabilidade agroeconômica do tomateiro em sistema de tutoramento vertical em espiral conduzido com uma ou duas hastes por planta. O delineamento foi em blocos casualizados em esquema fatorial 3x2, com quatro repetições, sendo avaliados três métodos de tutoramento: espiral, mexicano e estacas de bambu individuais na vertical e dois sistemas de condução: com uma haste e duas hastes por planta. Avaliou-se a produção de frutos por planta, diâmetro dos frutos, distribuição do número de frutos por classe de tamanho, altura das plantas e de inserção do primeiro cacho e o custo de produção. O método de tutoramento em espiral apresentou produção de frutos por planta semelhante ao método com bambu e superior ao mexicano. Quando as plantas foram conduzidas com uma haste, o diâmetro de frutos obtido no método em espiral foi superior ao método mexicano, entretanto, não diferiu do método com bambu. A receita líquida obtida no método em espiral foi superior à do método mexicano e inferior a do método com bambu. O tutoramento bambu vertical apresenta maior rentabilidade econômica quando comparado aos métodos espiral e mexicano. O tutoramento em espiral pode substituir o tutoramento mexicano, pois apresenta maior rentabilidade, credenciando-se como um novo método de tutoramento para o cultivo de tomate de crescimento indeterminado.Palavras-chave: Lycopersicon esculentum Mill, sistema de condução, crescimento indeterminado. TOMATO PERFORMANCE IN VERTICAL TUNA SYSTEM IN SPIRAL CONDUCTED WITH ONE OR TWO HASTES ABSTRACT:The current study aims to evaluate the agroeconomic viability of the tomato in a spiral vertical steerage system conducted with one or two stems per plant. The experimental design was in a randomized block with a 3x2 factorial, with four replications, and three tutoring methods were evaluated: spiral, Mexican and individual bamboo stakes vertically and two systems of conduction: with oneortwo stems per plant. Fruit production per plant, fruit diameter, number of fruits per size class, height of plants and insertion of the first cluster and the cost of production were evaluated. The spiral tutoring method showed fruit production per plant similar to the method with bamboo and superior to the Mexican one. When the plants were conducted with a stem, the fruit diameter obtained in the spiral method was superior to the Mexican method, however, did not differ from the method with bamboo. The net revenue obtained in the spiral method was higher than the Mexican method and lower than the method with bamboo. The vertical bamboo tufting presents greater economic profitability when compared to the spiral and Mexican methods. The spiral tutoring can replace the Mexican tutoring, since it presents greater profitability, being accredited as a new method of tutoring for the cultivation of undetermined growth tomato.Keywords: Lycopersicon esculentum Mill, driving system, indeterminate growth.

scholarly journals Carbohidratos y Floración en Hesperaloë funifera (Koch) Trel. (Samandoque)

2017 ◽  
pp. 67
Author(s):  
Steven P. Mclaughlin ◽  
Ryan R. Williams
Keyword(s):  
Fruit Set ◽  
Fruit Production ◽  
Hesperaloe Funifera

Several researchers have noted that flowering in Agavaceae requires substantial resources, but few studies have attempted to directly measure such resources. T his study addresses the hypothesis that fruit set in Hesperaloë funifera is limited by available carbohydrates. The accumulation of total non-structural carbohydrates (TNC) prior to flowering was measured, and total requirements for carbohydrate were estimated. Hesperaloë funifera was found to accumulate fructans, and roots were an important organ for storage of accumulated carbohydrates. Carbohydrates stored in the plant prior to flowering are sufficient to meet only about onethird of the carbohydrate needed to produce an average inflorescence with 1 % to 2% fruit set. All of the carbohydrate produced by photosynthesis from May through August is needed to support flowering and fruit production. Low percentage fruit set in Hesperaloë funifera is probably due to a deficiency of carbohydrate resources.

scholarly journals Heading of shoots and hand thinning of flowers and fruits on 'BRS Kampai' peach trees

2017 ◽  
Vol 52 (11) ◽  
pp. 1006-1016 ◽  
Author(s):  
Paula Duarte de Oliveira ◽  
Gilmar Arduino Bettio Marodin ◽  
Gustavo Klamer de Almeida ◽  
Mateus Pereira Gonzatto ◽  
Daniel Chamorro Darde
Keyword(s):  
High Frequency ◽  
Prunus Persica ◽  
Fruit Size ◽  
Fruit Production ◽  
No Production ◽  
Full Bloom ◽  
Fruit Thinning ◽  
Heading Control ◽  
Peach Trees

Abstract: The objective of this work was to evaluate the effect of shoot heading and of hand thinning in different development stages of flowers and fruits on the fruit production and quality of 'BRS Kampai' peach (Prunus persica) trees. The experiment was performed during three crop years, under the conditions of the “Depressão Central” region in the state of Rio Grande do Sul, Brazil, and the treatments were: T1, heading of half of the mixed shoot; T2, heading of one third of the mixed shoot; T3, flower thinning in the pink bud stage; T4, thinning at full bloom; T5, thinning of fruit with 5 mm; T6, thinning of fruit with 20 mm; and T7, no thinning or heading (control). Fruit production and quality were evaluated. Plants with no thinning were more productive, but showed high frequency of fruits with a diameter smaller than 60 mm. Shoot heading reduced production per tree and resulted in small-sized fruit. Thinning time did not affect production, and fruit size was greater when thinning was performed at the bloom stage. 'BRS Kampai' peach trees can be thinned starting at bloom, which provides greater fruit size, with no production loss.

Pollinator Insects and their Impact on Crop Yield of Mustard in Kusma, Parbat, Nepal

2019 ◽  
Vol 24 (2) ◽  
pp. 68-75
Author(s):  
Narayan Subedi ◽  
Indra Prasad Subedi
Keyword(s):  
Crop Yield ◽  
Fruit Set ◽  
Apis Cerana ◽  
Qualitative And Quantitative ◽  
Significant Difference ◽  
The Difference ◽  
Four Blocks ◽  
And Control ◽  
The Impact ◽  
Pod Length

The diversity of insect pollinators and their impact on crop yield of mustard were studied in Kusma, Parbat, Nepal from December 2018 to April 2019 in four blocks with each having 12 m2 areas. Two plots; treatment and control, were established in each block. Insect diversity was observed from 8 to 16 hrs, with the interval of an hour for three consecutive months (Jan-Feb). Eighty mustard plants were randomly selected, 40 from each plot just before flowering to find the impact of insect pollination on crop yield and these selected plants were examined for various qualitative and quantitative parameters. Altogether 16 species of pollinator insects belonging to five orders and nine families were recorded. Hymenoptera (36 %) was the most abundant order visiting mustard flowers followed by Diptera (34 %), Coleoptera (17 %), Lepidoptera (12 %) and Heteroptera (1 %). The most abundant family was Apidae (35.64 %), followed by Syrphidae (31.84 %). Apis cerana and Eristalis sp. were the most important pollinator insects of mustard. Seven species were found foraging both on pollen and nectar, four species foraging only on nectar and remaining five as casual visitors. The peak foraging activities of majority of the insects were observed between 12 hr to 14 hr. A significant difference was observed in the number of pods (59.80 ± 1.967 and 70.47 ± 2.431), fruit set (70.55 ± 1.362 and 80.94 ± 0.638), number of seeds per pods (16.70 ± 0.248 and 19.30 ± 0.330), diameter of seed (0.133 ± 0.2547 and 0.275 ± 0.0051) and weight of 100 dry seeds (0.33 ± 0.058 and 0.48 ± 0.023) in control and treatment plots whereas, the difference was non-significant in case of pod length between control and treatment plots (P=0.163).

scholarly journals EFFECT OF ROOSTER TREE GREEN MANURE ON CARROT AND LETTUCE INTERCROPPING SYSTEM

2018 ◽  
Vol 31 (3) ◽  
pp. 551-559 ◽  
Author(s):  
RICARDO CARLOS PEREIRA DA SILVA ◽  
FRANCISCO BEZERRA NETO ◽  
MAIELE LEANDRO DA SILVA ◽  
AURÉLIO PAES BARROS JÚNIOR ◽  
ANTÔNIO EWERTON DA SILVA ALMEIDA ◽  
...  
Keyword(s):  
Experimental Design ◽  
Green Manure ◽  
Cropping System ◽  
Agronomic Performance ◽  
Productive Performance ◽  
Tree Biomass ◽  
Agronomic Efficiency ◽  
Green Manuring ◽  
Increase Productivity

ABSTRACT Intercropping is a cropping system that involves cultivating two or more crops in the same area with different cycles and vegetative architectures. One of the ways to increase productivity and efficiency in this cropping system is through green manuring and by properly considering crop combinations, cultivation timing, and planting configuration of the component crops. Thus, the aim of this study was to evaluate the productive performance of carrot and lettuce intercropping systems under different amounts of rooster tree biomass incorporated into the soil and under different spatial arrangements. The study was conducted at the experimental farm Rafael Fernandes, RN, Brazil, in the period from September 2012 to January 2013, in an experimental design of randomized complete blocks in a 4 x 3 factorial scheme, with twelve treatments and 3 replicates. The treatments consisted of the combination of four rooster tree biomass amounts incorporated into the soil (10, 25, 40 and 55 t ha-1 on a dry basis) with three predetermined spatial arrangements between the component crops (2:2, 3:3 and 4:4), which correspond to the rows of carrot alternating with the rows of lettuce. The agronomic performance of the carrot and lettuce intercropping system was optimized in the amount of approximately 46.36 t ha-1 of rooster tree incorporated into the soil. There was no influence of the spatial arrangements on the agronomic efficiency of the carrot and lettuce intercropping. The use of rooster tree as green manure is agronomically viable in intercropped systems of carrot and lettuce.

scholarly journals The Use of a Tomato Landrace as Rootstock Improves the Response of Commercial Tomato under Water Deficit Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 748
Author(s):  
Mateu Fullana-Pericàs ◽  
Miquel À. Conesa ◽  
Miquel Ribas-Carbó ◽  
Jeroni Galmés
Keyword(s):  
Plant Growth ◽  
Water Deficit ◽  
Isotope Composition ◽  
Fruit Production ◽  
Agronomic Performance ◽  
Cultivation Conditions ◽  
Water Demands ◽  
Drought Tolerant ◽  
Use Efficiency ◽  
Tomato Landrace

Grafting onto drought tolerant rootstocks has been proposed as a useful strategy to overcome future water scarcity periods. The ‘de Ramellet’ tomato is a drought tolerant landrace selected under semiarid Mediterranean summer conditions under rain-fed or low irrigation. In this manuscript, the responses of a commercial hybrid ‘de Ramellet’ genotype grafted onto a traditional ‘de Ramellet’ (RL) and a commercial Maxifort (Mx) tomato rootstocks under commercial greenhouse conditions are studied. Non-grafted (NON) and self-grafted (SELF) plants were used as controls. Two water regimes were established: well-watered (WW, covering plant water demands) and water deficit (WD, reducing 50% irrigation as compared to WW). The results confirm an improvement in agronomic performance of Mx as compared to NON, but also show a similar improving effect of RL. Grafting enhanced plant growth regardless of the rootstock under WW conditions. Similarly, water-use efficiency (assessed as leaf carbon isotope composition) increased in grafted plants under WD treatment as compared to NON. Despite the lack of significant differences, RL tended to promote higher fruit production and fruit number than Mx, irrespective of the water treatment, whereas RL was the single graft combination with higher fruit production than NON under WD. In conclusion, the results uncover the potential of drought-adapted landraces to be used as rootstocks in order to increase plant growth and fruit production under both well-watered and water deficit cultivation conditions.

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