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职业迁徙
个人简介
My research involves two areas:
Soil-plant-water relations
Uptake of heavy metals by plants grown on polluted soils (called "phytoremediation")
I started the soil-plant-water relations research as a graduate student and, as a student, I learned to apply the laws of physics to the work. Early experiments used Ohm's law to calculate hydraulic resistance of split-root plants grown under saline conditions. This work also showed the importance of monitoring water potential, measured using thermocouple psychrometers, a new technique at the time. Only by knowing the water potential can one ascertain the direction of movement of water in the soil-plant-atmosphere system. The split-root work was continued at universities of employment (University of Massachusetts, Oklahoma State University, and Kansas State University). Results showed the effect of soil matric potential on plant growth by splitting roots between soil and nutrient solution, the first such experiment done. The split-root work was explained theoretically in a paper published in 1983 in Plant and Soil. This work is cited now, because of the interest in hydraulic lift by roots. Hydraulic lift occurs when plant roots extract water from a moist subsoil and release it into a dry topsoil. The phenomenon also has been called "reverse flow," because the pathway of water is opposite to that of the normal "positive" flow of water from the soil to the roots.
Soil-plant-water relations
Uptake of heavy metals by plants grown on polluted soils (called "phytoremediation")
I started the soil-plant-water relations research as a graduate student and, as a student, I learned to apply the laws of physics to the work. Early experiments used Ohm's law to calculate hydraulic resistance of split-root plants grown under saline conditions. This work also showed the importance of monitoring water potential, measured using thermocouple psychrometers, a new technique at the time. Only by knowing the water potential can one ascertain the direction of movement of water in the soil-plant-atmosphere system. The split-root work was continued at universities of employment (University of Massachusetts, Oklahoma State University, and Kansas State University). Results showed the effect of soil matric potential on plant growth by splitting roots between soil and nutrient solution, the first such experiment done. The split-root work was explained theoretically in a paper published in 1983 in Plant and Soil. This work is cited now, because of the interest in hydraulic lift by roots. Hydraulic lift occurs when plant roots extract water from a moist subsoil and release it into a dry topsoil. The phenomenon also has been called "reverse flow," because the pathway of water is opposite to that of the normal "positive" flow of water from the soil to the roots.
研究兴趣
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