Engenharia na Agricultura最新文献_第3页

Pre- and post- emergence control of Hovenia dulcis with extracts obtained from pepper (Capsicum baccatum) 辣椒提取物在发生前和发生后的防治

Engenharia na Agricultura Pub Date : 2022-10-20 DOI: 10.13083/reveng.v30i1.14256

M. G. Anchieta, Gianlucca Pigatto, J. Baisch, Bianca Motta Dolianitis, P. Coradi, J. Guedes, M. Mazutti, M. Tres, G. Zabot

{"title":"Pre- and post- emergence control of Hovenia dulcis with extracts obtained from pepper (Capsicum baccatum)","authors":"M. G. Anchieta, Gianlucca Pigatto, J. Baisch, Bianca Motta Dolianitis, P. Coradi, J. Guedes, M. Mazutti, M. Tres, G. Zabot","doi":"10.13083/reveng.v30i1.14256","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14256","url":null,"abstract":"This study evaluated the efficiency of extracts obtained from Capsicum baccatum by ultrasound-assisted extraction in the control of Hovenia dulcis, which is an invasive species popularly known in Brazil as “uva-do-japão”. The effects of extraction time (20 – 60 min), maximum power fraction (50 – 100%), and pulse cycle (0.3 – 0.7) were investigated on the activities of extracts. The pre-emergence assays demonstrated inhibition of 45-100% on the 14th day. In the post-emergence, the root and shoot lengths were 3.0 and 2.6 times smaller than the control (without application of extract). The fresh mass and dry mass were 4.7 and 4.2 times lower than the control. All these best results were found in the assay with higher extraction time (60 min) and power fraction (100%), and lower pulse cycle (0.3). Chlorophyll a and b and carotenoids ranged from 0.84 to 1.15, 0.19 to 0.35 and 0.32 to 0.40 mg/g fresh mass, respectively. Overall, it is demonstrated that extracts from Capsicum baccatum presented an inhibitory effect on the germination of Hovenia dulcis. Although the extract did not completely inhibit germination or cause the death of seedlings, it presented an effect against the normal development of seedlings, including the roots and shoots, thus allowing it to be used as a control strategy before germination or for small plants of this invasive species.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41484606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Wetting front of soil infiltration test by real-time sensing in prototype system real-time wetting front in soil infiltration tests 原型系统中实时传感的土壤入渗试验润湿前沿土壤入渗实验中的实时润湿前沿

Engenharia na Agricultura Pub Date : 2022-10-18 DOI: 10.13083/reveng.v30i1.14005

Jorge Otta Junior, Leandro Augusto de Carvalho, Pedro Luíz de Paula Filho, G. V. Miranda

{"title":"Wetting front of soil infiltration test by real-time sensing in prototype system real-time wetting front in soil infiltration tests","authors":"Jorge Otta Junior, Leandro Augusto de Carvalho, Pedro Luíz de Paula Filho, G. V. Miranda","doi":"10.13083/reveng.v30i1.14005","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14005","url":null,"abstract":"Agriculture is the most water-demanding economic activity. Nevertheless, the monitoring of agricultural production systems can improve the soil water condition and contribute to soil conservation, as well as increase irrigation efficiency through quick and assertive decision-making. Thus, the objective of this work was to carry out a real-time evaluation of the wetting front (WF), the water infiltration rate in the soil, and to verify whether the system performance can affect infiltration test data in a Red Latosol with clayey and very clayey textures. The public domain prototype system consisted of a permeameter, and 10 soil moisture sensors that were calibrated by the oven drying method and inserted into a PVC pipe from 10 cm to 100 cm depth. The equipment allowed the evaluation of the wetting front and calculation of the infiltration rate and water retention and variations along the soil profile. Data were analyzed using descriptive statistics using RStudio and Excel. The results showed that the prototype system is effective to simulate the water infiltration rate in the two soil textures analyzed at low cost.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49647266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soybean yield as a function of sowing season 大豆产量与播种季节的关系

Engenharia na Agricultura Pub Date : 2022-10-13 DOI: 10.13083/reveng.v30i1.13929

A. M. Barbosa, G. B. Silva, Silmara Elisiane da Silva Santos, T. A. Catuchi, C. S. Tiritan

引用次数: 0

Environmental impacts assessment of maize, soybean, and wheat production in the Southwest of São Paulo state: alternative scenarios for the substitution of chemical fertilization 圣保罗州西南部玉米、大豆和小麦生产的环境影响评估：替代化学施肥的替代方案

Engenharia na Agricultura Pub Date : 2022-10-11 DOI: 10.13083/reveng.v30i1.13864

Gabriela Giusti, Y. M. Saavedra, G. F. Almeida

{"title":"Environmental impacts assessment of maize, soybean, and wheat production in the Southwest of São Paulo state: alternative scenarios for the substitution of chemical fertilization","authors":"Gabriela Giusti, Y. M. Saavedra, G. F. Almeida","doi":"10.13083/reveng.v30i1.13864","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13864","url":null,"abstract":"Mineral fertilizers are highly impactful in the agricultural sector, and animal manure can be an alternative to mitigate its impacts. The goal of this research was to estimate the potential environmental impacts on the production of soybean, maize, and wheat at the Lagoa do Sino Farm School from the Federal University of Sao Carlos, contemplating the 2016/2017 cropping season and testing the replacement of 100%, 50%, and 30% of chemical fertilization by composted cow manure. Life Cycle Assessment (LCA) was the methodology used. The functional unit was one ton of each crop produced on farm. Impacts were also assessed for one hectare of production for each agricultural product investigated and the system boundary was a cradle-to-farm gate. Impacts were assessed using the CML 2000 world+ method for abiotic depletion, global warming, acidification, and eutrophication. Chemical fertilization was the main hotspot for all crops produced. Soybean showed a potential impact of 1489 MJ, 125 kg CO2 eq., 0.6 kg SO2 eq., and 0.4 kg PO4 eq.; the production of maize 1497 MJ, 197 kg CO2 eq., 1 kg SO2 eq., and 0.8 kg PO4 eq.; and the production of wheat 5863 MJ, 632 kg CO2 eq., 3.3 kg SO2 eq., and 2.4 kg PO4 eq. The 30% substitution scenario was the most efficient observed since there is an increase in fuel consumption if distribution of larger amounts of manure are needed. Enriching the manure and investing in fossil fuel substitution will improve the environmental profile of the crops produced under intensive systems in the Southwest state of Sao Paulo, Brazil.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46158998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

What is the contribution of piglet waste in the first week after weaning to greenhouse gas emissions? 断奶后第一周的仔猪粪便对温室气体排放的贡献是什么？

Engenharia na Agricultura Pub Date : 2022-10-04 DOI: 10.13083/reveng.v30i1.13908

J. Oliveira, A. Orrico, R. Pietramale, Carolina Obregão da Rosa, Clandio Favarini Ruviaro, B. Leite, Janaina Freire Machado

{"title":"What is the contribution of piglet waste in the first week after weaning to greenhouse gas emissions?","authors":"J. Oliveira, A. Orrico, R. Pietramale, Carolina Obregão da Rosa, Clandio Favarini Ruviaro, B. Leite, Janaina Freire Machado","doi":"10.13083/reveng.v30i1.13908","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13908","url":null,"abstract":"This study aims to characterize the waste of weaned piglets and estimate the emissions of N2O in kg of CO2 eq/kg of weight gain in the first week of housing. Primary data were obtained in the first week after weaning of piglets to identify how much waste from this animal category may affect the environment. The life cycle assessment was applied to verify the amount of manure and the emission of nitrous oxide (N2O) considering the weight gain (WG) of piglets in the first post-weaning week. Eight waste collections were carried out in two lots representing an average of 8,099 animals with initial and final weight of 5.01 and 5.84 kg, respectively. The production of residues was 0.128 kg of dry matter (DM) for each kilogram of WG produced. This waste production has an emission capacity of approximately 4x10-4 kg N2O/kg WG in the first post-weaning week. Considering that N2O has a global warming potential almost 300 times higher in retaining heat than CO2, each 1 kg of piglet produced can emit about 0.129 kg of CO2 equivalent from the N2O produced. According to the number of piglets evaluated in this study, the total emission can reach 1.85 tons of CO2 equivalent in the first post-weaning week alone.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45208849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of reduced age at first calving and an increased weaning rate on CO2 equivalent emissions in a cow-calf system 降低初产犊龄和提高断奶率对犊牛系统CO2当量排放的影响

Engenharia na Agricultura Pub Date : 2022-09-28 DOI: 10.13083/reveng.v30i1.14028

Laís Ângelo de Abreu, V. Rezende, A. Gameiro, P. Baruselli

{"title":"Effect of reduced age at first calving and an increased weaning rate on CO2 equivalent emissions in a cow-calf system","authors":"Laís Ângelo de Abreu, V. Rezende, A. Gameiro, P. Baruselli","doi":"10.13083/reveng.v30i1.14028","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14028","url":null,"abstract":"The objective of this study was to evaluate the impact of using technology to reduce the age at first calving (AFC; from 48 to 24 months) and increase the weaning rate (WR; from 60% to 80%) in beef herds. The need for pasture area (hectares) and the CO2 equivalent emissions (CO2eq.) of animals present in the production system were analyzed. Data from a livestock breeding system were used to produce 400 male calves per year: System 1) using reproductive biotechnology (fixed-time artificial insemination [FTAI] and System 2) without the use of reproductive biotechnology (only natural mating). System 1, which used reproductive biotechnology (FTAI; composed of 1,540 AU of animals in 1,540 hectares), presented a lower AFC (24 months), a higher WR (80%), and lower CO2eq. emissions per year (2,311.3 tons). System 2, which did not employ reproductive technology (composed of 2,475 AU [450 kg of animals] on 2,475 hectares), had the highest AFC (48 months) and lowest WR (60%) and emitted 3,714.5 tons of CO2eq. per year. The reduction in CO2eq. emissions per year was 1,403.3 tons in the system that used reproductive biotechnology, corresponding to gains of US$ 135,920.42 (US$ 96.86 per ton of CO2eq.). It is estimated that the adoption of the FTAI increases the reproductive efficiency of a cow-calf operation system, which can produce the same number of male calves (400) on 935 fewer hectares of pasture (-37.3%) and with a reduction of 1,403.3 tons of CO2eq. produced per year.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47796277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Reuse of expired dairy products and sewage in the production of biogas by anaerobic digestion 过期乳制品和污水在厌氧消化生产沼气中的再利用

Engenharia na Agricultura Pub Date : 2022-09-26 DOI: 10.13083/reveng.v30i1.13936

D. C. Marin, Lívia Mendes Mendoza, Romário Pereira de Carvalho Júnior, S. I. Maintinguer

{"title":"Reuse of expired dairy products and sewage in the production of biogas by anaerobic digestion","authors":"D. C. Marin, Lívia Mendes Mendoza, Romário Pereira de Carvalho Júnior, S. I. Maintinguer","doi":"10.13083/reveng.v30i1.13936","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13936","url":null,"abstract":"Dairy industry is a prominent sector of the agro-industry with global production of 906 million tonnes of milk. Several dairy products are wasted due their high perishability. Anaerobic digestion is a sustainable alternative for reducing this waste aiming biogas production. This study evaluated the co-digestion of expired dairy products (EDP) with synthetic sewage from two assays using two types of dairy waste, separately: Assay I (EDP mixture of 80% of milk + 15% of yogurt + 5% of milk cream) and Assay II (industrial raw mixture of EDP). Both assays were composed of 20 g COD L-1 (Chemical Oxygen Demand per Liter) using anaerobic batch reactors (1.0 L) assembled in duplicates with 0.5 L headspace (N2) and working volume of 0.5 L with initial pH 8.2, at 37 °C, in a static mode. The cumulative CH4 productions were 2722.5 NmL in 31 days of operation (Assay I) and 3140.0 NmL in 25 days of operation (Assay II). Equivalent CH4 yields were obtained for the both assays with ~330 NmLCH4 g CODrem-1. Carbohydrates and COD removals were 96.8% and 98.0%; 87.3% and 89.4%, respectively. The co-digestion of EDP with sewage was effective to CH4 production with efficient organic matter removal. These results encourage new strategies for reuse of expired dairy products by the use of anaerobic digestion.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44600094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hand-arm vibration while operating a side brush cutter with three cutting implements in two crops 在两种作物中操作带有三种切割工具的侧刷切割机时，手臂振动

Engenharia na Agricultura Pub Date : 2022-09-05 DOI: 10.13083/reveng.v30i1.14115

Mateus Cassol Cella, Valmir Werner, Catize Brandelero, G. M. Bertollo, Edvaldo Faour Coutinho da Silva, J. Schlosser, Thomas Newton Martin

{"title":"Hand-arm vibration while operating a side brush cutter with three cutting implements in two crops","authors":"Mateus Cassol Cella, Valmir Werner, Catize Brandelero, G. M. Bertollo, Edvaldo Faour Coutinho da Silva, J. Schlosser, Thomas Newton Martin","doi":"10.13083/reveng.v30i1.14115","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14115","url":null,"abstract":"The use of side brushcutters exposes users to vibration and noise, which can cause damage to the operator, as they act as a stressor agent. Excessive vibration is responsible for countless disorders, including Raynaud’s syndrome. This study aimed to assess the effect of the vibrations of a side brush cutter on the human body. A side brush cutter was used with three cutting implements (double blade, triple blade and double nylon thread) applied to two crops (wheat and ryegrass). The vibration was measured through a three-dimensional accelerometer placed on the handgrips of the brush cutter, in compliance with the provisions of the ISO 5349-1 Standard. The analyzed variables were submitted to the Shapiro-Wilk and Bartlett tests. Due to the abnormality, the data were transformed by the Neperian logarithm and submitted to analysis of variance, and the means were compared by the Tukey test at 5% probability. As a result, the orthogonal y-axis presented a higher vibration level; the three-point blade showed the lowest vibration level compared to the other cutting implements for both crops; these vibration levels did not exceed the NHO10 recommendation. Hence, using the appropriate attachment for each operation may reduce the harm caused by vibration to the operator’s body.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44221302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sampling density to detect spatial dependence of potassium, calcium and magnesium in sandy soils 检测沙质土壤中钾、钙、镁空间相关性的采样密度

Engenharia na Agricultura Pub Date : 2022-09-02 DOI: 10.13083/reveng.v30i1.14048

Jessé Alves Batista, Felippe Augusto Santos Oliveira, Mauricio Eduardo Silva Folador, Javier Zeballos Ruiz Junior, Gustavo Barbosa de Moura Batista, Tatiane Carla Silva, R. Montanari

{"title":"Sampling density to detect spatial dependence of potassium, calcium and magnesium in sandy soils","authors":"Jessé Alves Batista, Felippe Augusto Santos Oliveira, Mauricio Eduardo Silva Folador, Javier Zeballos Ruiz Junior, Gustavo Barbosa de Moura Batista, Tatiane Carla Silva, R. Montanari","doi":"10.13083/reveng.v30i1.14048","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14048","url":null,"abstract":"The sampling grid density for georeferenced soil collection must be large enough to allow the identification of the spatial dependence of attributes with representative accuracy of the cultivated area, but not large enough to make fertility mapping unfeasible. The objective of this study was to define, from the evaluation of geostatistical parameters obtained from a super dense soil sampling, an efficient grid for detecting the spatial dependence of potassium (K+), calcium (Ca2+), and magnesium (Mg2+) in a sandy soil. The experiment was conducted in a 3.2 hectare annatto crop (Bixa orellana L.), in 2017. The geostatistical grid consisted of 31 points per hectare, totaling 101 georeferenced points in an 18x18 m spacing. Soil was sampled at the depths of 0-0.20 m and 0.20-0.40 m. A strong spatial dependence was found for all soil attributes in both depths, while the semivariograms fitted to the spherical model with good coefficients of determination (R²) indicating a spatial correlation between the attributes. The range of spatial dependence was close to 100 m for all attributes in both layers. In sandy soils, an efficient sampling grid to detect the spatial dependence of K+, Ca2+ and Mg2+ must consider a semivariogram range of approximately 100 meters.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43295602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2 monitoring system for storage of grains and seeds 谷物和种子储存的二氧化碳监测系统

Engenharia na Agricultura Pub Date : 2022-08-23 DOI: 10.13083/reveng.v30i1.14026

G. S. Wenneck, R. Saath, Guilherme Soares Wenneck, Gustavo Lopes Pereira, Vinícius Villa e Vila, Luis Henrique Brambilla Alves

引用次数: 1