Author: Alan Harradine
Publisher:
ISBN:
Category : Nursery stock
Languages : en
Pages : 28

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Author: Alan Harradine
Publisher:
ISBN: 9781864236507
Category :
Languages : en
Pages : 52

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26

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Author:
Publisher:
ISBN:
Category : Fruit-culture
Languages : en
Pages : 1832

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Author: Thomas Alvin Fretz
Publisher:
ISBN:
Category : Herbicides
Languages : en
Pages : 11

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Author:
Publisher:
ISBN:
Category : Plant regulators
Languages : en
Pages : 792

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Author: John W. III. Markham
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Heat stress is an important problem in potted nursery plants, but container color may moderate effects of solar radiation on container soil temperatures. Field studies were conducted near Manhattan, Kansas, USA during summer to evaluate effects of container color on growth of roots and aboveground biomass in: bush beans (Phaseolus vulgaris); red maple (Acer rubrum); and eastern redbud (Cercis canadensis). In the tree studies, effects of shaded soil-surfaces on plant growth were also evaluated. Four treatments among studies included containers colored black (control), flat white, gloss white, and silver, with two additional treatments in the tree studies of green and black containers with shaded soil surfaces (black shaded); treatments were arranged in a completely randomized design. Plants were grown in a bark-based soil-less media, and temperatures were measured at 5 cm depths in the sun-facing sides and centers in five containers per treatment. After four months (June-October), plant variables were measured. Roots were separated into three sections: core (10.2 cm diam.), north, and south, rinsed of all media, dried and weighed. In the bean study, media temperatures at the sun-facing side averaged lowest in gloss and flat white (~36 °C) and greatest in the black control (50.3 °C). Accordingly, total root biomass at the sun-facing side was reduced by 63 to 71% in black compared to flat and gloss white containers. In heat-sensitive maples, media temperatures at the sun-facing side averaged up to 7.7 °C greater in black, black shade and green than in other treatments; temperatures in black shade may have been lower if shade cloth had covered the sun-facing sides of containers in addition to only the media surface. Media temperatures in the core averaged 3.5 to 3.8 °C greater in black than in flat and gloss white, resulting in up to 2.5 times greater belowground biomass and up to 2.3 times greater aboveground biomass in flat and gloss white than in black pots. In heat-tolerant redbuds, the effects of container color on whole-plant growth were less evident. Data suggests that heat-sensitive plants benefit from using white pots or painting outer surfaces of green and black pots white.

Author:
Publisher:
ISBN:
Category : Weeds
Languages : en
Pages : 616

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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1732

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Author: Mark S. Ashton
Publisher: John Wiley & Sons
ISBN: 1119270952
Category : Science
Languages : en
Pages : 776

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Book Description
The most up-to-date, comprehensive resource on silviculture that covers the range of topics and issues facing today’s foresters and resource professionals The tenth edition of the classic work, The Practice of Silviculture: Applied Forest Ecology, includes the most current information and the results of research on the many issues that are relevant to forests and forestry. The text covers such timely topics as biofuels and intensive timber production, ecosystem and landscape scale management of public lands, ecosystem services, surface drinking water supplies, urban and community greenspace, forest carbon, fire and climate, and much more. In recent years, silvicultural systems have become more sophisticated and complex in application, particularly with a focus on multi-aged silviculture. There have been paradigm shifts toward managing for more complex structures and age-classes for integrated and complementary values including wildlife, water and open space recreation. Extensively revised and updated, this new edition covers a wide range of topics and challenges relevant to the forester or resource professional today. This full-color text offers the most expansive book on silviculture and: Includes a revised and expanded text with clear language and explanations Covers the many cutting-edge resource issues that are relevant to forests and forestry Contains boxes within each chapter to provide greater detail on particular silvicultural treatments and examples of their use Features a completely updated bibliography plus new photographs, tables and figures The Practice of Silviculture: Applied Forest Ecology, Tenth Edition is an invaluable resource for students and professionals in forestry and natural resource management.