Effect of the planting season on carrot cultivars growth and yield in the brazilian semiarid region

In regions with high temperatures, carrot cultivation is impracticable, as high temperatures tend to reduce yield and quality of the product. However, with the advent of summer cultivars, carrot cultivation in these regions has become viable. The aim of this work was to evaluate the performance of ten carrot cultivars in different planting seasons. The experiments were carried out at the Rafael Fernandes Experimental Farm of the Federal Rural Semiarid University (UFERSA). The experiments were carried out in May, June, July and August of 2017. The experimental design was a randomized block with ten treatments and four repetitions. The characteristics that were evaluated were the root classification (long, average and short roots); commercial, non-commercial and total yield; dry plant weight and root fresh weight. Both the planting season and the cultivar played important roles in agronomic performance throughout the experimental period. In May and June, the highest average yields and plant growth were obtained (43 and 45 t ha-1 yield, respectively). Hybrid cultivars showed better performance than open-pollinated cultivars in terms of yield. The Brasília, BRS Planalto, and Kuronan varieties showed poor performance in all the evaluated characteristics.

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Yield of the Okra Submitted to Nitrogen Rates and Wastewater in Northeast Brazilian Semiarid Region

Journal of Agricultural Science ◽

10.5539/jas.v10n4p409 ◽

2018 ◽

Vol 10 (4) ◽

pp. 409 ◽

Cited By ~ 1

Author(s):

Aldair De Souza Medeiros ◽

Manoel Moisés Ferreira de Queiroz ◽

Renato A. de Araújo Neto ◽

Patrícia Da Silva Costa ◽

Amanda Costa Campos ◽

...

Keyword(s):

Block Design ◽

Domestic Wastewater ◽

Growth And Yield ◽

Intermittent Flow ◽

Semiarid Region ◽

Santa Cruz ◽

Randomized Block Design ◽

Brazilian Semiarid ◽

Nitrogen Rates ◽

Available Volume

Water is an indispensable resource for the maintenance of life; however, the available volume for consumption has decreased over a period of life, as a result of which, the availability of water that is inferior in quality has increased. In this context, we aimed to evaluate the growth and yield of okra (Santa Cruz cultivar) under different nitrogen rates and irrigation facilities using post-treated domestic wastewater through sand filter with intermittent flow in a Brazilian semiarid region. The experiment was performed in the Pombal region of the Paraíba state, Brazil using a randomized block design with six nitrogen Rates (N1 = 0, N2 = 40, N3 = 80, N4 = 120, N5 = 160, and N6 = 200 kg ha-1) and irrigation by using wastewater. The water was added to the treatment with 100% (160 kg ha-1) using nitrogen fertilization recommendation and irrigation water supply. The effects of treatments on the growth and production variables of okra plants were evaluated.

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Temporal rainfall variability as inductor of the phenology of Brazilian semiarid species

Australian Journal of Crop Science ◽

10.21475/ajcs.20.14.02.p2312 ◽

2020 ◽

pp. 299-307

Author(s):

Alberício Pereira de Andrade ◽

Divan Soares da Silva ◽

Riselane de Lucena Alcântara Bruno ◽

Dinnara Layza Souza da Silva ◽

João Luciano de Andrade Melo Junior ◽

...

Keyword(s):

Rainfall Variability ◽

Temporal Distribution ◽

Experimental Period ◽

Seasonal Rainfall ◽

Semiarid Region ◽

Interannual Variations ◽

The Third ◽

Experimental Station ◽

Brazilian Semiarid

Usually, in the Brazilian semiarid region where dry and humid periods are well determined, phenological events are mainly affected by seasonal rainfall and availability of water in the soil. The studies in these regions have importance especially to understand the dynamics of dry forests. Thus, the objective of this work was to characterize the phenophases of trees P. pyramidalis, C. blachetianus, A. pyrifolium and J. mollissima, and their relationship with the temporal distribution of rainfall, which occurs in the form of pulses. Furthermore, the effect of goat grazing was evaluated. The experimental areas presented different caprine stockings, where first had ten and the second five. The third stocking remained without goats during the experimental period. For the phenological follow-up, 50 tree individuals of each species were selected, tagged and monitored weekly, at Experimental Station, in the municipality of São João do Cariri-PB. In order to quantify the phenological events, the percentage of Fournier intensity was used, registering the presence and absence of the phenophases: sprouting, flowering, fruiting and senescence, whose data were related to the water pulses and inter-pulses. The phenological events presented annual patterns, with interannual variations in intensity. We observed that the phenophases occur in synchrony with the temporal distribution of the rainfall pulses in the area of its occurrence. As the dry season progresses, reduction in sprouting, flowering and fruiting occurs when the inter-pulses of rainfall was intensified. The presence of goats did not influence the phenological development of the species.

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Efficient inoculation of diazotrophic bacteria into sugarcane by the drip irrigation system

Pesquisa Agropecuária Brasileira ◽

10.1590/s1678-3921.pab2019.v54.01110 ◽

2019 ◽

Vol 54 ◽

Author(s):

Welson Lima Simões ◽

Anderson Ramos de Oliveira ◽

Moises Alves de Souza ◽

Verônica Massena Reis ◽

Paulo Ivan Fernandes-Júnior

Keyword(s):

Drip Irrigation ◽

Irrigation System ◽

Bacterial Consortium ◽

Negative Control ◽

Growth And Yield ◽

Semiarid Region ◽

Drip Irrigation System ◽

Brazilian Semiarid ◽

Leaf Gas Exchanges ◽

Negative Controls

Abstract: The objective of this work was to assess the efficiency of the inoculation of a diazotrophic bacterial consortium by the drip irrigation system into sugarcane (Saccharum spp.), in the Brazilian semiarid region. The evaluated treatments were: standard inoculation by submersion; one or two inoculations by drip irrigation; nitrogen (urea) applied by fertigation; and negative controls, without inoculation or nitrogen fertilization. Leaf gas exchanges and plant growth and yield were assessed. Inoculation by irrigation is efficient for all variables, and double inoculation by the drip irrigation system stands out, increasing stem yield in 16% when compared with the negative control, without differing from the treatment with nitrogen fertilizer.

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Nitrogen Stocks in Soil Classes Under Different Land Uses in the Brazilian Semiarid Region

Journal of soil science and plant nutrition ◽

10.1007/s42729-021-00466-4 ◽

2021 ◽

Author(s):

Uemeson José dos Santos ◽

Everardo Valadares de Sá Barretto Sampaio ◽

Eunice Maia de Andrade ◽

Alexandre de Siqueira Pinto ◽

Bruno de Oliveira Dias ◽

...

Keyword(s):

Semiarid Region ◽

Land Uses ◽

Brazilian Semiarid

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Management of water supply systems from interbasin transfers: case study in the Brazilian semiarid region

Urban Water Journal ◽

10.1080/1573062x.2021.1925703 ◽

2021 ◽

pp. 1-12

Author(s):

José Almir Cirilo ◽

Alfredo Ribeiro Neto ◽

Nyadja Menezes Rodrigues Ramos ◽

Carla Fernanda Fortunato ◽

Júlia Daniele Silva de Souza ◽

...

Keyword(s):

Water Supply ◽

Semiarid Region ◽

Water Supply Systems ◽

Brazilian Semiarid ◽

Interbasin Transfers ◽

Supply Systems

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Spatial distribution and temporal variation of microcrustaceans assembly (Cladocera and Copepoda) in different compartments of a reservoir in the brazilian semiarid region

Acta Limnologica Brasiliensia ◽

10.1590/s2179-975x9616 ◽

2018 ◽

Vol 30 (0) ◽

Cited By ~ 1

Author(s):

Josiane Souza Santos ◽

Nadson Ressyé Simões ◽

Sérgio Luiz Sonoda

Keyword(s):

Spatial Distribution ◽

Spatial Variation ◽

Temporal Variation ◽

Aquatic Macrophytes ◽

Temporal Dynamics ◽

Lateral Compartment ◽

Spatial And Temporal Variation ◽

Semiarid Region ◽

Brazilian Semiarid ◽

Significant Spatial Variation

Abstract Aim: The objective of this study was to investigate the spatial and temporal variation of microcrustacean assemblages of a reservoir in the Brazilian semiarid region. Methods Physical and chemical water variables and samples of microcrustaceans were collected at eight sites of the reservoir between July 2013 and November 2014, in a total of seven campaigns. For this study, the reservoir was categorized in two compartments: lateral and central. Results Limnological variables showed significant temporal variation (PERMANOVA, Pseudo-F = 19.51, p = 0.001). Higher turbidity values and suspended solids were observed in the rainiest months, while during the dry months, we measured higher values of transparency, dissolved oxygen, and chlorophyll-a. It was not found significant spatial variation of limnological variables (PERMANOVA, Pseudo-F = 0.96; p = 0.394). During the study period, ten species were recorded: four Cladocera (Ceriodaphnia cornuta, Daphnia gessneri, Diaphanosoma birgei and Diaphanosoma spinulosum ) three Copepoda Calanoida (Argyrodiaptomus azevedoi, Notodiaptomus cearensis and Notodiaptomus iheringi) and three Copepoda Cyclopoida (Macrocyclops albidus, Thermocyclops minutus and Thermocyclops decipiens). The microcrustacean assemblages showed significant temporal variation (PERMANOVA, Pseudo-F = 4.34; p = 0.001) as well as significant spatial variation (PERMANOVA, Pseudo-F = 9.46; p = 0.001). The highest values of abundance and richness were observed in the lateral compartment, this result is mainly related to the presence of aquatic macrophytes in this region, because the analysis of partial RDA indicated that limnological variables explained only 11% of this variation (Pseudo-F = 2.08, p = 0.001). Conclusions The results suggest that the seasonality of the semiarid is an important factor in the temporal dynamics of the limnological variables, while the aquatic macrophytes play an important role in the spatial distribution of the microcrustacean assembly.

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Drainage network extraction of Brazilian semiarid region with potential flood indication areas

10.1117/12.2066906 ◽

2014 ◽

Cited By ~ 1

Author(s):

Sergio Rosim ◽

João Ricardo de Freitas Oliveira ◽

Jussara de Oliveira Ortiz ◽

Miguel Zanic Cuellar ◽

Alexandre Copertino Jardim

Keyword(s):

Semiarid Region ◽

Drainage Network ◽

Brazilian Semiarid

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LAMB’S-QUARTERS INTERFERENCE WITH DIRECT SEEDED BROCCOLI

Canadian Journal of Plant Science ◽

10.4141/cjps90-150 ◽

1990 ◽

Vol 70 (4) ◽

pp. 1215-1221 ◽

Cited By ~ 1

Author(s):

IRIS BITTERLICH ◽

MAHESH K. UPADHYAYA

Keyword(s):

Brassica Oleracea ◽

Field Experiments ◽

Chenopodium Album ◽

Total Yield ◽

Growth And Yield ◽

Marketable Yield ◽

Weed Density ◽

Weed Interference ◽

Lamb’S Quarters ◽

Cole Crop

Field experiments were conducted in 1987 and 1988 to study the effect of lamb’s-quarters (Chenopodium album L.) interference on broccoli (Brassica oleracea L. var. botrytis ’Emperor’) growth and yield. Broccoli growth was initially affected by weed interference at 28–36 d after seeding. Generally, the negative effect of weed interference on broccoli growth increased with increasing weed density and time after seeding. Interference by 15 lamb’s-quarters plants m−2 reduced the biomass of broccoli plants by 71–73% compared to the weed-free control at 57–58 d after seeding. Weed density-crop yield relationship curves showed that one lamb’s-quarters plant m−2 decreased total yield by 18–20% and marketable yield by 22–37%. Lamb’s-quarters reduced the total yield per plot by decreasing the average head weight of broccoli. The number of heads per plot was not affected. Weed interference also reduced the weight of heads classified as marketable (> 10 cm across). However, in 1987 more heads failed to reach a marketable size which resulted in a much smaller marketable yield than in 1988.Key words: Brassica oleracea var. botrytis, broccoli, Chenopodium album L., weed density, weed interference, cole crop

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