scholarly journals IMPACTOS TÉCNICO-ECONÔMICOS DA ADUBAÇÃO DE PASTOS

Nativa ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 173-181
Author(s):  
Carlos Eduardo Avelino Cabral ◽  
Carla Heloisa Avelino Cabral ◽  
Alyce Raiana Monteiro Santos ◽  
Aline Müller Motta ◽  
Lucas Gimenes Mota

A criação de bovinos no Brasil ocorre, prioritariamente, em pastagens e, neste contexto, a adubação do pasto é uma importante estratégia de aumento na eficiência produtiva. Diante disso, objetivou-se, com esta revisão, descrever os impactos técnicos da adubação no desenvolvimento de gramíneas tropicais. A calagem é uma prática importante na disponibilidade dos nutrientes e, novos estudos visam demonstrar que o intervalo entre a incorporação do calcário e a semeadura tem maior dependência da umidade do solo e que é possível reduzir este período que tradicionalmente é de 60 a 90 dias. A adubação fosfatada tem maior impacto sobre a implantação do que a manutenção do pasto, e quando negligenciada na formação do pasto, observa-se um efeito residual sobre a rebrota. O nitrogênio e o potássio são os nutrientes mais extraídos na manutenção dos pastos, o que se torna importante o estudo da relação entre estes nutrientes, bem como a adoção da adubação potássica em sistemas em que a adubação nitrogenada é uma prática rotineira. A varredura, que consiste na mistura de sobras de fertilizantes em galpões, embora tenha baixo custo por quilo de produto, o uso pode ser antieconômico, o que depende da composição do insumo adquirido. Palavras-chave: calagem; fertilização de pastos; formação de pastagens.   Technical and economic impacts of pasture fertilization   ABSTRACT: Cattle production on Brazil priority occurs in grasslands, in this context, pasture fertilization is an important strategy to improve production efficiency. Therefore, the aim with this review is to describe the technical impacts of fertilization on tropical grass development. Liming is an important practice in nutrient availability and new studies aim to demonstrate that the interval between limestone incorporation and seeding has more dependence on soil moisture, and that is possible to reduce this period, which traditionally is from 60 to 90 days. Phosphate fertilization has a greater impact on pasture implantation than maintenance, and when neglected in pasture formation, there is a residual effect on regrowth. Nitrogen and potassium are the nutrients extracted on pasture maintenance, which makes it important to study the relationship between these nutrients, as well as the adoption of potassium fertilization in systems where nitrogen fertilization is a routine practice. Mixing leftover fertilizers in warehouses, although it has a low cost per kilo of product, the use can be uneconomical, which depends on the input composition purchased. Keywords: liming; pasture fertilization; pasture implantation.

2020 ◽  
Vol 9 (5) ◽  
pp. 81
Author(s):  
Zhaosen Zhang ◽  
Yan Gao ◽  
Chen Ye

PLC control system has a very wide range of applications in today’s electrical automation equipment, because it has the characteristics of good stability, strong environmental adaptability, low cost and diversified program editing according to actual needs, making it automatic The efficiency of control has been greatly improved. Based on the current development of electrical equipment automation in China, this paper analyzes the effects and characteristics of PLC used in automation control systems from many aspects. It studies the selection and application of PLC in the operation of electrical equipment, and proposes to improve production efficiency. Some feasible measures.


Author(s):  
А.А. Volotskoy ◽  

The study focuses on the nature of restructuring, highlighting its causes and stages, uses a systematic approach as a unified method of scientific knowledge. The author demonstrates the relationship of the internal and external environment of the enterprise with the success of the restructuring process, and also substantiates the need for careful planning of restructuring procedures in order to minimize risks. The definition of restructuring, given by the author, streamlines the previously accepted concepts and believes restructuring as a cyclical systematic process of strategic planning, which leads to comprehensive changes in the enterprise activity and improve production efficiency.


2019 ◽  
Vol 25 ◽  
pp. 02006
Author(s):  
Litao Wang

With the development of the revolutionary tide of new technology, our production scale is gradually expanding. Manual production has been unable to meet the requirements of industrial production. In order to improve production efficiency and welding quality, we developed a welding robot. Because it has the characteristics of high production efficiency, stable welding quality and large practical demand. It is developing most rapidly. With the development of PLC technology, we gradually apply it to the development of welding robot. Its advantages of good ductility, low cost and convenient maintenance can bring great value to industrial production.


EDIS ◽  
2019 ◽  
Vol 2005 (9) ◽  
Author(s):  
Matt Hersom

The pasture/livestock production enterprise should be viewed as an integrated production system. An important step in improving the production efficiency of the system is to consider the interrelationship between the cattle and the pasture forage supply. Management of stocking density is one such relationship between grazing cattle and pastures. The stocking density of Florida pastures can impact beef cattle production, forage production, and enterprise profitability. The overall goal of managing grazing animals is to utilize the forage that a pasture already produces to its optimum potential. This document is AN155, one of a series of the Department of Animal Sciences, UF/IFAS Extension. Original publication date August 2005. AN155/AN155: Pasture Stocking Density and the Relationship to Animal Performance (ufl.edu)


2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Michael D. Mitchell ◽  
Walter E. Beyeler

The capacity to maintain stability in a system relies on the components which make up the system. This study explores the relationship between component-level resilience and system-level resilience with the aim of identifying policies which foster system-level resilience in situations where existing incentives might undermine it. We use an abstract model of interacting specialized resource users and producers which can be parameterized to represent specific real systems. We want to understand how features, such as stockpiles, influence system versus component resilience. Systems are subject to perturbations of varying intensity and frequency. For our study, we create a simplified economy in which an inventory carrying cost is imposed to incentivize smaller inventories and examine how components with varying inventory levels compete in environments subject to periods of resource scarcity. The results show that policies requiring larger inventories foster higher component-level resilience but do not foster higher system-level resilience. Inventory carrying costs reduce production efficiency as inventory sizes increase. JIT inventory strategies improve production efficiency but do not afford any buffer against future uncertainty of resource availability.


TAPPI Journal ◽  
2014 ◽  
Vol 13 (2) ◽  
pp. 17-25
Author(s):  
JUNMING SHU ◽  
ARTHAS YANG ◽  
PEKKA SALMINEN ◽  
HENRI VAITTINEN

The Ji’an PM No. 3 is the first linerboard machine in China to use multilayer curtain coating technology. Since successful startup at the end of 2011, further development has been carried out to optimize running conditions, coating formulations, and the base paper to provide a product with satisfactory quality and lower cost to manufacture. The key challenges include designing the base board structure for the desired mechanical strength, designing the surface properties for subsequent coating operations, optimizing the high-speed running of the curtain coater to enhance production efficiency, minimizing the amount of titanium dioxide in the coating color, and balancing the coated board properties to make them suitable for both offset and flexographic printing. The pilot and mill scale results show that curtain coating has a major positive impact on brightness, while smoothness is improved mainly by the blade coating and calendering conditions. Optimization of base board properties and the blade + curtain + blade concept has resulted in the successful use of 100% recycled fiber to produce base board. The optical, mechanical, and printability properties of the final coated board meet market requirements for both offset and flexographic printing. Machine runnability is excellent at the current speed of 1000 m/min, and titanium dioxide has been eliminated in the coating formulations without affecting the coating coverage. A significant improvement in the total cost of coated white liner production has been achieved, compared to the conventional concept of using virgin fiber in the top ply. Future development will focus on combining low cost with further quality improvements to make linerboard suitable for a wider range of end-use applications, including frozen-food packaging and folding boxboard.


Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4593
Author(s):  
Katarzyna Cheba ◽  
Iwona Bąk

The main purpose of the paper is to present a proposal to measure the relationships between Goal 7 of the 2030 Agenda for Sustainable Development and one of the areas considered in the green growth concept: environmental production efficiency. Both of these areas illustrate the relationship between the natural environment and the economy, emphasizing transformations in the field of energy use. Selected taxonomic methods, TOPSIS, and multicriteria taxonomy, were applied to study the relationships between the two areas. The results of the EU countries classification showed a variety of countries’ development pathways within a single economic community. Despite continued attempts to equalize the development levels between European Union countries in many strategic areas, they remain highly diversified. That is also true for the areas analyzed in the paper, which is a disturbing situation, indicating that both strategies might not correlate in all respects. Further research into the relationships linking the remaining dimensions of both strategies is required.


2012 ◽  
Vol 52 (7) ◽  
pp. 665 ◽  
Author(s):  
Jessica E. Morris ◽  
Greg M. Cronin ◽  
Russell D. Bush

This overview discusses how precision sheep management could be utilised in the Australian sheep industry to improve production efficiency and reduce animal welfare concerns due to low monitoring frequency by stockpeople. The concept of precision sheep management is described. This is a system in which sheep are managed as individuals or small groups rather than as a (whole) flock. Precision sheep management utilises the application of radio frequency identification technology, enabling producers to better monitor sheep in extensive situations, and contribute to improved efficiency of management and sheep welfare. Examples of combining radio frequency identification with other technologies such as walk-over-weighing and Pedigree Matchmaker are discussed. These technologies provide producers with tools to improve the cost effectiveness of, and labour efficiency associated with, collecting data on individual animals. The combined technologies should also improve consistency and reliability of information, enhancing decision-making by producers, for example, from regular monitoring of biometric variables such as liveweight, or calculating breeding values to enable superior genetic comparisons over time.


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