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博文

目前显示的是标签为“Irrigation”的博文

Active Management of Plant Canopy Temperature as a Tool for Modifying Plant Metabolic Activity

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53531#.VMdOkSzQrzE Author(s)    James R. Mahan , John J. Burke Affiliation(s) USDA/ARS, Plant Stress and Water Conservation Laboratory, Lubbock, Texas, USA . ABSTRACT The relationship between a plant and its thermal environment is a major determiner of its growth and development. Since plants grow and develop within continuously variable thermal environments, they are subjected to continuous thermal variation over their life cycle. Transpiration serves to uncouple the temperature of the plant from that of its environment in a manner that reduces the occurrence of high temperature stresses that can limit plant performance. In some agriculturally important plants, there are desirable metabolic outcomes that are associated with specific stress events (e.g. wine grapes). In these plants it is often desirable to induce temperature and water stresses of kn...

First Intraluminal Temperature Measurement during Ho:YAG-Laser Exposure at an In-Vitro URS

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52946#.VK3gj8nQrzE Author(s)     Jens Cordes * , Felix Nguyen , Karl-Dietrich Sievert Affiliation(s) Clinic of Urology, University Medical Center Schleswig-Holstein, Lübeck, Germany . ABSTRACT Introduction: The laser is a high energy instrument which can melt metals like nitinol. So it is very important to know under which conditions it is dangerous to perform an endourologic lithotripsy. We measure the temperature increase during laser exposure in an underwater in-vitro ureter model. For comparison, temperatures with and without irrigation and with different distances from the laser fiber to the thermometer are measured. Materials and Methods: We used the Ho:YAG-laser (Vera Pulse TM , Coherent) with a 365 μm laser fiber. The settings of the laser were 0.6 J with a frequency of 5 Hz which is the minimum setting for that type of laser. The experi...

Photosynthetic Water Use Efficiency of Heritage and Modern Potatoes under Limited and Unlimited Water Environments

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52587#.VJujUcCAM4 Author(s)   Isaac R. Fandika 1,2 , Peter D. Kemp 1 , James P. Millner 1 , Dave Horne 1 Affiliation(s) 1 Institute of Natural Resources, Massey University, Palmerston North, New Zealand . 2 Department of Agricultural Research Services, Kasinthula Agricultural Research Station, Chikwawa, Malawi . ABSTRACT Photosynthetic capacity for heritage (Taewa) and modern potato cultivars were compared at different water and nitrogenregimes in the glasshouse and field. The glasshouse was 2*2*4 factorial design with two irrigation: 100% ET and 60% ET; two applied N: 50 kg N ha -1 and 200 kg N ha -1 , two Taewa (Moe Moe, Tuta...