scholarly journals The Physiology of Sugar-Cane VI. Effects of Temperature, Light, and Water on Set Germination and Early Growth of Saccharum Spp.

1963 ◽  
Vol 16 (2) ◽  
pp. 416 ◽  
Author(s):  
PC Whiteman ◽  
TA Bull ◽  
KT Glasziou
Keyword(s):  
Water Supply ◽  
Sugar Cane ◽  
Early Growth ◽  
Subsequent Growth ◽  
Saccharum Spp ◽  
Effects Of Temperature ◽  
External Water

Freshly cut sets from irrigated cane gave 100% germination without an external water supply. Pre-soaking did not accelerate germination or subsequent growth.

Sugar cane (Saccharum spp.) baled trash yield and energetic potential mapping

2003 ◽  
Author(s):  
M. L. C. Ripoli ◽  
L. A. Balastreire ◽  
T. C. Ripoli
Keyword(s):  
Sugar Cane ◽  
Saccharum Spp ◽  
Potential Mapping

Effects of the use of drainage-/ infiltration systems in the Pleistocene uplands of the Netherlands

2021 ◽  
Author(s):  
Janine A. de Wit ◽  
Ruud P. Bartholomeus ◽  
Gé A.P.H. van den Eertwegh ◽  
Marjolein H.J. van Huijgevoort
Keyword(s):  
Waste Water ◽  
The Netherlands ◽  
Boundary Conditions ◽  
Water Supply ◽  
Field Experiments ◽  
Crop Yields ◽  
Scale Model ◽  
Groundwater System ◽  
External Water ◽  
The Impact

<p>The Netherlands is a low-lying, flood prone country, located in a delta. Most Dutch agricultural fields are drained to quickly get rid of excess water to increase crop production. Additionally, the freshwater demand of different sectors (agriculture, industry, drinking water) increases, causing an increased pressure on the groundwater system. The combination of fast drainage and increased use of groundwater for human activities led to declining groundwater tables in the Dutch Pleistocene uplands. Given the changing climate resulting in prolonged dry periods, solutions for water retention are needed to decrease the pressure on the groundwater system to guarantee the future water supply for different sectors.</p><p>One of the solutions could be to modify the current drainage systems to drainage-infiltration (DI)-systems with a dual purpose. First, the DI-system stores water during (heavy) rainfall in the soil, but if the risk of flooding increases, the DI-system discharges water. Second, (external) water is actively pumped into the drainage network to raise groundwater tables (subirrigation). Through efficient use of the available external water source (treated waste water, industrial waste water, surface water or groundwater) the pressure on the groundwater system reduces.</p><p>We focus on the data and model results of several field experiments using subirrigation conducted in the Dutch Pleistocene uplands (± 2017-2020). The effects of subirrigation on the groundwater table and soil moisture conditions will be shown, including water supply rate and hydrological boundary conditions. We also provide both the set-up and results of field scale model simulations (SWAP; Soil-Water-Atmosphere-Plant model) to i) quantify the impact of subirrigation on all components of the (regional) water balance (including transpiration, drainage and groundwater recharge), ii) quantify crop yields, and iii) optimize the configuration and management of subirrigation systems for different soil types, hydrological boundary conditions, and climate scenarios.  </p>

scholarly journals Evaporation-Induced Water and Solute Coupled Transport in Saline Loess Columns in Closed and Open Systems

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-26
Author(s):  
Jian Xu ◽  
Wei Lan ◽  
Yanfeng Li ◽  
Wen-Chieh Cheng ◽  
Jun Yuan ◽  
...  
Keyword(s):  
Water Supply ◽  
Open Systems ◽  
Atmospheric Temperature ◽  
Soil Salinization ◽  
Coupled Transport ◽  
Basic Law ◽  
Initial Stage ◽  
Moisture State ◽  
External Water ◽  
Water And Solute Transport

Evaporation-induced water and solute coupled transport is a significant cause for soil salinization that leads to a series of engineering and environmental problems. In the artificial evaporation environment, including relative humidity, atmospheric temperature, atmospheric pressure, radiation intensity, and wind speed, evaporation of loess columns with sodium sulfate, temperature profile, and water and solute transport in closed and open systems were investigated. In the former case, a range of stability was noted in the lower part of the column where the heat, water, and solute coupled transport only exhibited a weak response to a specified evaporation environment. As the environment was more favorable for evaporation, or at a higher gradient of temperature, this range extended downwards, while above this range the heat, water, and salt profiles in the evaporation-affected domain changed dramatically, characterized by a basic law that solutes moved with water and were then retained with water desalinated. Evidences were found from the profiles that the water contents in the evaporation-affected range decreased but the salt contents increased, especially in the surface. In an open system, by contrast, there was little difference in temperature but greater in water and salt profiles. Three stages were found from the supply of external water during evaporation. In the initial stage, the higher gradient formed between the initial moisture state and the preset external water level led to a rapid supply of external water. As the evaporation proceeded, a relatively stable water profile was reached as the intensity of water supply approached to that of evaporation, accompanied by a continual migration of solutes towards the surface. Due to the accumulation of precipitated salts, water transport was slowed down, and the intensity of water supply decreased. The changes in soil suction may account for the above behavior.

Water relations of germination in the recalcitrant seeds of Quercus robur L.

1994 ◽  
Vol 4 (3) ◽  
pp. 315-322 ◽  
Author(s):  
W. E. Finch-Savage ◽  
H. A. Clay
Keyword(s):  
Water Supply ◽  
Water Relations ◽  
Quercus Robur ◽  
High Moisture Content ◽  
High Moisture ◽  
Mature Fruit ◽  
Tissue Pressure ◽  
Radicle Growth ◽  
Physical Barriers ◽  
External Water

AbstractQuercus robur L. fruits are desiccation sensitive and shed from the plant at high moisture content (c. 48%). Water relations measurements were taken at intervals during the germination of prematurely-harvested immature fruits and naturally-shed mature fruits. In fruits from both harvests the pericarp and seed coat delayed germination by providing physical barriers to emergence of the radicle and by restricting the rate of imbibition. Although immature fruits could germinate in the absence of water they germinated more rapidly in the presence of an external water supply. The fully-mature fruit required a supply of external water, but germination was more rapid than in immature fruits. Substantial physiological changes, resulting in the accumulation of solutes, and increased axis size and extensibility occurred before splitting of the pericarp and subsequent germination of immature fruits. Such changes did not occur in fully-mature fruits, but fruits, from both harvests imbibed water and splitting of the pericarp appeared to result from increased embryo size and tissue pressure. Splitting was minimal prior to germination in immature fruits without an external water supply. It is suggested that the resulting reduction in Ψp when the pericarp splits was greater in the axis than in the cotyledons because of its greater capacity for expansion. This would create a Ψw gradient driving water flow to the axis from the cotyledons allowing continued radicle growth for germination.

Effects of Partial Defoliation on Sucrose Accumulation, Enzyme Activity and Agronomic Parameters in Sugar cane (Saccharum spp.)

2004 ◽  
Vol 190 (4) ◽  
pp. 256-261 ◽  
Author(s):  
F. A. Gutierrez-Miceli ◽  
R. Morales-Torres ◽  
Y. de Jesus Espinosa-Castaneda ◽  
R. Rincon-Rosales ◽  
J. Montes-Molina ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Sugar Cane ◽  
Sucrose Accumulation ◽  
Saccharum Spp

scholarly journals IRRIGAÇÃO SUPLEMENTAR DA CANA-DE-AÇÚCAR (Saccharum spp) COLHIDA NO MÊS DE JANEIRO: UM MODELO DE ANÁLISE DE DECISÃO PARA O LITORAL SUL DO ESTADO DE ALAGOAS

Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 339-355 ◽  
Author(s):  
Marcio Aurélio Lins dos Santos ◽  
José Antonio Frizzone
Keyword(s):  
Decision Analysis ◽  
Sugar Cane ◽  
Production Costs ◽  
Decision Analysis Model ◽  
Net Income ◽  
Southern Coast ◽  
Analysis Model ◽  
Saccharum Spp ◽  
Irrigation Technology ◽  
Soil Preparation

IRRIGAÇÃO SUPLEMENTAR DA CANA-DE-AÇÚCAR (Saccharum spp) COLHIDA NO MÊS DE JANEIRO: UM MODELO DE ANÁLISE DE DECISÃO PARA O LITORAL SUL DO ESTADO DE ALAGOAS  Márcio Aurélio Lins dos Santos; José Antonio FrizzoneDepartamento de Engenharia Rural, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, SP,  [email protected]   1 RESUMO As usinas de açúcar e álcool no estado de Alagoas tem grande importância econômica. Para usar sua capacidade instalada torna-se necessário o uso de técnicas que aumentem sua produtividade e diminuam os custos de produção da cana-de-açúcar. A tecnologia de irrigação se tornou uma alternativa rentável para as condições do estado de Alagoas. Tomando-se por base a viabilidade da tecnologia de irrigação suplementar em cana soca de janeiro, durante apenas o primeiro estádio de desenvolvimento da cana-de-açúcar do litoral sul de Alagoas, a árvore de decisão foi utilizada na avaliação dos valores esperados dos retornos associados a diferentes alternativas disponíveis para a escolha do tomador de decisão. Levando em consideração as condições analisadas, os resultados do estudo permitiram obter as seguintes conclusões: existe um grande potencial de viabilidade técnica e econômica para irrigação do início de ano (janeiro), considerando os benefícios diretos e indiretos de aumento de produtividade agrícola, maior longevidade das soqueiras, redução de preparo de solo e plantio, tratos culturais e transporte de cana; a receita líquida esperada apresenta pequena sensibilidade às variáveis de custos com tratos culturais de soqueiras e preparo de solo e plantio. UNITERMOS: irrigação suplementar; Cana-de-açúcar; Análise de decisão  SANTOS, M. A. L. dos; FRIZZONE, J.A. ADDITIONAL IRRIGATION OF A SUGAR-CANE (Saccharum spp) CROP HARVESTED IN JANUARY: A DECISION ANALYSIS MODEL FOR THE SOUTHERN COAST OFALAGOAS STATE  2 ABSTRACT Sugar mills and alcohol distilleries inAlagoas State,Brazil, have great economical importance. The use of techniques that increase their productivity and reduce sugar-cane production costs is needed to use their installation capacity to the fullest. Irrigation technology has become a profitable alternative for the sugar-cane (ratoon cycle) conditions inAlagoasState. A decision tree was used to evaluate expected values form different available alternatives to choose the best decision maker, taking into consideration the viability of additional irrigation technology in cane beat in January, just during the first development stage of the sugar-cane (ratoon cycle) in the southern coast of Alagoas State. From the obtained results of the analyzed conditions, it was concluded that: there is a great technical and economical viability for irrigation in the beginning of the year (January), considering direct and indirect benefits of agricultural productivity increase, greater ratoon longevity, reduction of soil preparation and planting, culture treatments and sugar cane transport; the expected net income presents small influence of cost variables with ratoon culture treatments and soil preparation and planting. KEYWORDS: additional irrigation; sugar-cane; decision analysis

Sign in / Sign up

Export Citation Format

Share Document