该杂志发表农学所有领域的原创文章，包括土壤科学、农业昆虫学、土壤肥力和肥料、土壤物理学、栽培植物生理学、植物病理学、植物健康、植物技术、成因、形态和土壤分类、管理和保护土壤、植物病虫害综合治理、植物改良、农业微生物学、农业寄生虫学、种子生产和加工。

The journal "Acta Scientiarum - Agronomy" publishes original research articles in all fields of agronomy, including soil science, agricultural entomology, soil fertility and fertilization, soil physics, crop physiology, plant pathology, plant health, plant technology, soil genesis, morphology and classification, soil management and conservation, integrated pest management, plant breeding, agricultural microbiology, agricultural parasitology, and seed production and processing.

《Acta Scientiarum - Agronomy》杂志发表农学各个领域的原创研究文章，涵盖土壤科学、农业昆虫学、土壤肥力与施肥、土壤物理学、栽培植物生理学、植物病理学、植物健康、植物技术、土壤的成因、形态与分类、土壤管理与保护、植物病虫害综合治理、植物改良、农业微生物学、农业寄生虫学，以及种子生产与加工等主题。

Acta Scientiarum - Agronomy

Protein, oil and isoflavones contents can change according to environmental and genetic factors. The food type soybean shows special characteristics, e.g., high protein content and mild flavor. The objective of this study was to investigate the different sowing dates effect on the yield, 100 grains weight, oil, protein and isoflavones contents of food type breeding lines and soybean cultivars and their interactions. Productivity and 100 grains weight varied with sowing dates and soybean genotypes. The protein content ranged from 36.40 to 42.44% and the oil content from 18.29 to 22.71 %. No significant interaction was found between genotype versus sowing dates to protein content. Protein and oil contents showed a negative correlation. The isoflavones content also varied with sowing dates and soybean genotypes. The cultivar BRS 257 has the highest isoflavones content including β-glucosides, malonyl-glucoside and aglycones forms. The productivity, 100 grains weight, oil, protein and isoflavones contents is genetically determined but is also influenced by sowing date probably due by the temperature during the grain formation stage and by the height of the planting location.

Gustavo Henrique Freiria

Wilmar Ferreira Lima

Rodrigo Santos Leite

José Marcos Gontijo Mandarino

Josemeyre Bonifácio da Silva

Cassío Egídio Cavenagui Prete

Acta Scientiarum Agronomy

Acta Sci. Agron.

&lt;b&gt;Productivity and Chemical composition of food type soybean in different sowing dates

食品型大豆在不同播种日期下的产量与化学成分

One way to reduce mineral fertilizers is to use alternative fertilizers instead, such as the byproducts from the food industry. In the present study we evaluated the effects of sugarcane bagasse ash on the physiology, growth, and development of sunflowers (Helianthus annuus L.). We conducted an experiment in a greenhouse using a completely randomized design with two sunflower cultivars (Multissol and Catissol), five sugarcane bagasse ash doses (0.0, 3.125, 4.687, 6.25, and 7.812 mg ha-1), and 5 replicates. At 85 days after planting we determined the plant height; leaf number; stem diameter; internal and external diameter of the flower chapter; leaf area index; shoot dry weight; net assimilation rate; dry mass production rate; relative and absolute growth rate; extravasation of electrolytes; relative water content; photosynthetic pigments (chlorophyll a, b, carotenoids, and the chlorophyll a/b ratio); and soluble carbohydrates, proteins, and proline. The height, number of leaves, and shoot dry mass increased due to the availability of nutrients contained in the ash. The incorporation of ash into the soil increased the photosynthetic activity (chlorophyll a and b) of both sunflower cultivars. The diameter of the stem, leaf area index, and relative growth rate of both sunflower cultivars increased with increasing ash dose. Therefore, the ash can be used as an alternative fertilizer, complementing or replacing mineral fertilizers.

Growth and physiology of two sunflower cultivars fertilized with sugarcane bagasse ash

两种施用甘蔗渣灰的向日葵品种的生长与生理

Citrus tristeza virus (CTV) can be transmitted by several aphid species in a semi-persistent mode, with Toxoptera citricida being the most efficient vector. In Brazil, mild CTV isolates are used for pre-immunization of citrus trees against severe isolates. We aimed to determine the capacity and efficiency of T. citricida in separating the viral complex into haplotypes from three well-characterized CTV isolates (PIAC, CS1, and Forte Rolândia). Single-aphid transmission assays were conducted to determine CTV transmission efficiency. The results showed that T. citricida transmitted only haplotypes from the PIAC and CS1 isolates, with efficiencies of 8 and 4%, respectively. Both isolates caused mild CTV symptoms in Brazil. However, isolate Forte Rolândia, which causes severe symptoms in citrus trees, was not transmitted by T. citricida. The detection of CTV haplotypes from PIAC and CS1 isolates in sweet orange (Citrus sinensis) plants after a single aphid transmission occurred at different time points. The first haplotype observed was from PIAC 150 days after citrus was challenged by a single aphid, followed by CS1 at day 210 after transmission. In addition, differences in the single-strand conformation polymorphism patterns between the CTV isolates and CTV haplotypes were determined, suggesting that an aphid can acquire and transmit only one CTV haplotype to citrus plants during phloem feeding. The study of the mechanism of transmission by the vector can increase our knowledge of the interactions among hosts, vectors, and pathogens, which are often neglected.

Angelica Albuquerque Tomilhero Frias

Carlos Alexandre Zanutto

Ana Claudia da Silva Mendonça

Freddy Ibanez-Carrasco

Cecilia Tamborindeguy

William Mário de Carvalho Nunes

Transmission of isolates of Citrus tristeza virus by single aphids (Toxoptera citricida)

单个桔蚜（Toxoptera citricida）传播柑橘衰退病毒分离物的研究

Brazil has high soil loss rates due to its tropical and subtropical climate characteristics. In this sense, soil use and management practices may minimize such losses. In this study, experimental plots were monitored for eight years in southern Brazil during natural rainfall events. Treatments were as follows: I) bare soil under conventional tillage, II) barley-oat/ soybeans succession under conventional tillage, III) oat-lupine-vetch/ maize succession under conventional tillage, IV) barley-oat/ soybeans succession under no-tillage, and V) oat-lupine-vetch/ maize succession under no-tillage. Data on rainfall amount and erosivity indices (EI30, EI20, and EI10) were subjected to regression analyses, evaluating the effects of climatic variables on soil and water losses. We could also analyze crop species, conventional and no-tillage systems, and winter and summer seasons. The highest soil and water losses occurred in treatments under conventional tillage. In addition, soybeans treatments increased soil and water losses. Maize under no-tillage was the most efficient practice, as it had soil losses (3.4 times) and water losses (1.5 times) lower than soybeans under conventional tillage. Rainfall amounts and EI30 were better correlated with soil and water losses in conventional tillage treatments. However, EI10 could better explain the soil losses from the conservationist treatment.

Liana Dambros

Luciana da Silva Corrêa Lima

Claudia Alessandra Peixoto de Barros

Elemar Antonino Cassol

Soil loss and runoff in southern Brazil in conservation systems: a long-term experiment

巴西南部保护系统中的土壤流失与径流：一项长期实验

Combinations between crop intercropping and forage production in a no-tillage system are not well established for environments under low water retention and soil fertility conditions. Our study aimed to evaluate the potential interactions between soybean-grass intercropping with residual nitrogen in a no-tillage system. The experimental design was a randomized block with four replications in a subdivided plot scheme. The main plots in the summer season were: 1) soybean monoculture; 2) soybean - Aruana Guinea grass (Megathyrsus maximus cv. Aruana) intercropping, and 3) soybean - Congo grass (Urochloa ruziziensis cv. Comum) intercropping. The subplots were the nitrogen rates of 0, 50, 100, and 150 kg ha-1, applied as side-dressing in maize and grasses during the autumn-winter season. Here, the results of the summer seasons are shown. To do so, the parameters evaluated were soybean agronomic traits, dry biomass production, and macronutrient concentrations of plants intercropped. The main effects and interactions were studied. Our findings showed that soybean-Aruana Guinea grass intercropping is an alternative to no-tillage system implementation. Moreover, residual nitrogen from the autumn-winter season directly interfered with the dry biomass production of grasses intercropped with soybeans in the summer season. In short, the systems studied seem suitable for implementing a no-tillage system, which aims to neutralize degraded pastures and produce forage for ensilage. Despite the changes in macronutrient concentrations within the intercropping system and residual nitrogen, and among intercropped crops over the years, Congo grass intercropped with soybeans in the summer season showed great capacity for phosphorus, potassium, and magnesium cycling.

Karina Batista

Alessandra Aparecida Giacomini

Luciana Gerdes

Waldssimiler Teixeira de Mattos

Ivani Pozar Otsuk

Potential interaction of soybean-grass intercropping with residual nitrogen for a no-tillage system implementation

大豆-草间作与残留氮在免耕系统实施中的潜在相互作用

We tested the hypothesis that the increase in soil stiffness, induced by variations in bulk density and water content at the tire-soil contact interface, causes a reduction in the contact area. For this, we examined the contact area from different tire-ground contact scenarios and compared the measurements and simulations using a contact area description model. Front and rear tractor tires were used for the measurement of the contact area under tilled soil, sugarcane field, unpaved road, and paved ground scenarios, which induced different bulk densities and water content levels. The results revealed that soil stiffness reduced the tire-soil contact area. The tire-soil contact area increased as the water content increased and the bulk density was reduced. For the front tractor tire, the theoretical contact area was similar to the values found for tilled soil, but there was a large difference between the measurements (2,200 cm2, for the tilled soil) and the theoretical estimates (3,100 cm2) for the rear tractor tire (likely induced by tire dimensions). Our results suggest that increases in soil stiffness reduce the tire-soil contact area. The higher the soil bulk density and the lower the soil moisture, the lower the contact area. The results also revealed that the tire tractor tread might reduce the contact at the hard surface, making the shape of the contact area more geometrically irregular and different from those predicted by models using regular geometry (e.g., cycles, ellipses, or rectangles). This study suggests that two-body (soil and tire) contact models for deformable surfaces should be used in future tire-soil contact models of agricultural field vehicles.

Davi de Farias Thorpe

Mário Monteiro Rolim

Elvira Maria Reges Pedrosa

Djalma Eusébio Simões Neto

Roberta Queiroz Cavalcanti

Renato Paiva de Lima

Impacts of bulk density and water content on the tire-soil contact area of agricultural field vehicles

散装密度和水分含量对农田车辆轮胎与土壤接触面积的影响

One of the domains of genetic enhancement that has extensively employed both simulation and authentic data is Biometrics. Selecting efficient models for the Genome-Wide Selection (GWS) process using molecular markers (SNPs) presents several challenges. Among these challenges is the effective identification of the optimal model for fitting a given dataset. To contribute to this endeavor, this paper's primary objective is to assess the predictive accuracy of nine (9) distinct models, each following different paradigms within the realm of Biometrics. The data employed in this study were generated through simulation, encompassing the primary issues encountered in this field of research, including high dimensionality, nonlinearity, and multicollinearity. As the primary findings, notable observations include the enhancement of predictive efficiency as data noise decreases, the predominance of the tree paradigm (for low noise levels, BOO), and the efficacy of the neural network paradigm (for high noise levels, RBF).

Patrick Wöhrle Guimaraes

Alcione de Paiva Oliveira

Cosme Damião Cruz

Predictions in biometric models

生物识别模型中的预测

This study aimed to evaluate the effect of silicon and acibenzolar-S-methyl sources on the development of yellow melon (Cucumis melo L.) in the field and the occurrence of diseases in different years. The treatments consisted ofthe silicon sources Agrosilício® (3 g L−1), Rocksil® (3 g L−1), and Chelal® Si (2 L 100 L−1), the additional treatments acibenzolar-S-methyl (ASM) (2 mM) and the fungicide thiabendazole (400 mL 100 L−1), and a control (sterile distilled water). The following characteristics were evaluated: natural incidence of diseases; gas exchange: CO2 assimilation rate, transpiration, stomatal conductance, internal CO2 concentration, water use efficiency, instantaneous water use efficiency, and carboxylation; postharvest aspects: fruit weight, pulp thickness, pulp firmness, titratable acidity, pH, soluble solids, and vitamin C content; productivity; and the enzymatic activity of peroxidases, polyphenol oxidases, and phenylalanine ammonia-lyase. No significant response was observed for naturally occurring diseases. Treatments with Chelal®Si, Rocksil®, and Thiabendazole® increased photosynthetic and transpiration rates in the yellow melon. The silicon and ASM sources did not influence the physicochemical characteristics or the enzymatic activity of fruits. No effect was observed on the biometric characteristics, productivity, and chemical quality of fruits in both years of cultivation. Si sources increased photosynthetic rate and transpiration. However, no diseases were observed during the experimental period. Leaf spraying with silicon and acibenzolar-S-methyl sources did not influence the biometric characteristics and fruit production of yellow melon. The silicon and acibenzolar-S-methyl sources did not induce an increase in the enzymatic activity of peroxidases, polyphenol oxidase, and phenylalanine ammonia-lyase. Fruit production was higher in 2020.

Mirelly Miguel Porcino

Valdeir de Souza Oliveira

Edcarlos Camilo da Silva

Maria Silvana Nunes

Bárbara Moura Tico

Guilherme Chaves de Holanda

Mileny dos Santos de Souza

Luciana Cordeiro do Nascimento

Field management of yellow melon (Cucumis melo L.) with silicon sources

硅源对黄皮瓜（Cucumis melo L.）田间管理的影响

Jangada is a municipality in the Baixada Cuiabana region, State of Mato Grosso, Brazil. This study aimed to evaluate the collection of local cassava conserved by four traditional communities of Jangada in terms of ethnobotanical/socioeconomic and genetic aspects. Socioeconomic and ethnobotanical analyses were carried out with 40 farmers using qualitative techniques and descriptive statistics. Seven microsatellite markers were used for genetic analysis. A total of 182 cassava citations were verified, 31 of which were different. The Broto Branco variety was the most frequent (94.3%), followed by Vermelha Gaiadeira and Liberata (82.9 and 77.1%, respectively). The calculated median age for farmers was 56 years. Spearman’s coefficient indicated a positive correlation between the increase in farmer’s age and the number of cultivated local varieties. Few varieties are planted by many farmers, and most are planted by few farmers. High genetic diversity was observed, and most of the variability occurred within communities (88%). Two groups were formed in the cluster analysis, with two communities in each group. The propagule circulation network helped to understand the genetic similarity of communities with the closest geographic location. Cassava cultivation plays an important role in the studied communities, which maintain a high ethnobotanical and genetic diversity and relevant knowledge about the cultivated varieties.

Juliana Rodrigues Larrosa Oler

Elizabeth Ann Veasey

Joyce Mendes Andrade Pinto

Eulália Soler Sobreira Hoogerheide

On farm conservation of cassava in traditional communities of Jangada, Mato Grosso State, Brazil: ethnobotany and genetic diversity

巴西马托格罗索州Jangada传统社区木薯的农场保护：民族植物学与遗传多样性

This study investigates the meteorological variables exerting the most significant influence on the growth and productivity of four tomato hybrids cultivated for industrial processing in the Brazilian Savannah of Goiás State. Data on morphological and meteorological variables were collected in five locations (Hidrolândia, Itaberaí, Palmeiras de Goiás, Piracanjuba, and Silvânia) during the year 2020. Morphological characteristics assessed included plant height, number of branches, and leaf area index (LAI). Meteorological variables considered were average air temperature, global solar irradiance, thermal sum, and soil water availability. Pearson correlations, canonical correlations, and multivariate Stepwise regression were employed to analyze the relationships between morphological and meteorological variables. The study revealed that soil water availability significantly impacts tomato crop development, indicating the need for improved irrigation management. Adequate irrigation management contributed to an 86.1% increase in plant height and a 79.7% boost in leaf area index, while average air temperature influenced a 34% increase in the number of branches. In conclusion, proper irrigation management is crucial for enhancing tomato crop growth and development and optimizing water use.

Fábio Miguel Knapp

José Pedro Alves Junior

Rafael Battisti

Fillipe de Paula Almeida

Ricardo de Sousa Bezerra

Derblai Casaroli

Adao Wagner Pêgo Evangelista

Juliana Carla Carvalho dos Santos

Environmental factors affecting tomato growth for industrial processing in the Brazilian Savannah of Goiás State

巴西戈亚斯州塞拉多地区工业加工用番茄生长的环境因素

Abbreviation	Acta Sci. Agron.
Journal Impact	1.06
Quartiles(Global)	AGRONOMY(Q3)

ISSN	1679-9275, 1807-8621
h-index	33

Publication Information	Publisher: Universidade Estadual de Maringa，Publishing cycle: ，Journal Type: journal，Open Access Journals: Yes
Basic data	Year of publication: 2008，Proportion of original research papers: 100.00%，Self Citation Rate:8.30%， Gold OA Rate: 100.00%
Average review cycle	网友分享经验：>12周，或约稿
Average recruitment ratio	网友分享经验：容易

Acta Scientiarum - Agronomy

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<b>Productivity and Chemical composition of food type soybean in different sowing dates