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Webinar Description:
Planting trees on 2 days per year(Arbor & Earth Day) with no after planting cares is not working.
The most common reasons for trees to fail is overwatering (incl. California) & underwatering
The real limiting factor is the plant available water. What can we do to help the newly planted trees?
Among the common factors affecting the survival of newly planted trees,
under-watering and over-watering are the top two. Providing water to a newly planted tree for the first 2-5 years is critical for its survival and thrive. We all have seen and probably participated one of the tree planting projects "Million Trees XYZ City" in the spring on exactly two days: Earth Day or Arbor Day. It is a great photo opportunity for politicians, but how about following up with watering in the hot summer days and/or during droughts! Trees die and spring will bring up a new round of tree planting projects.
Is there anything we can do to give trees a better chance to survive? By examining the situation and looking at the root of the problem, the real limitation is in the Plant Available Water (PAW). No matter how much one irrigate the soil or how much rainwater falls on to it, any water above the Field Capacity is wasted. We will review some technologies for stabilizing soil moisture, including methods that significantly boost the PAW without drowning the plant roots. We also review methods and technologies that make the best usage of natural precipitation (stormwater). Case studies across the North America will be used to illustrate on how these methods can significantly increase the survival rate of newly transplanted trees.
Learning Objectives:
1. Explain the benefits and importance of growing trees where people live from social, environmental, economic, and health aspects.
2. Recognize common causes of plant death in urban environment, which is known to be a harsh growing environment
3. Evaluate new technologies that help to solve the watering challenges with natural rainfall and by increasing the available plant water.
Wei Zhang
Wei Zhang holds a Ph.D. degree in Engineering from Virginia Tech. He has been doing research & development for the green industry for 10 years. His research areas include watering solutions for landscape plants, plant health, plant protection against stresses like drought and road salt. His work also provides novel solutions to green stormwater infrastructures, for which plants are used for the treatment of pollutants in stormwater. He has more than 40 peer-reviewed scientific journal articles, one monograph and more than 100 conference presentations. He has been a frequent speaker on Arboriculture, Landscape Architecture, Urban Forestry, Stormwater Green Infrastructure, and related conferences and seminars. He is known as a scientist, educator and public speaker. Dr. Zhang is an ASLA approved LA CES provider.
