Foliar feeding: Difference between revisions
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'''Foliar feeding''' is a technique of feeding plants by applying liquid [[fertilizer]] directly to their [[leaf|leaves]].<ref>[http://attra.ncat.org/attra-pub/foliar.html#intro Foliar Fertilization] By George Kuepper, NCAT Agriculture Specialist, Published 2003, [http://attra.ncat.org/who.html ATTRA] Publication #CT135</ref> Plants are able to absorb essential elements through their leaves. The absorption takes place through their [[stomata]] and also through their [[epidermis (botany)|epidermis]]. Transport is usually faster through the stomata, but total absorption may be as great through the epidermis. Plants are also able to absorb nutrients through their bark. |
'''Foliar feeding''' is a technique of feeding plants by applying liquid [[fertilizer]] directly to their [[leaf|leaves]].<ref>[http://attra.ncat.org/attra-pub/foliar.html#intro Foliar Fertilization] By George Kuepper, NCAT Agriculture Specialist, Published 2003, [http://attra.ncat.org/who.html ATTRA] Publication #CT135</ref> Plants are able to absorb essential elements through their leaves.<ref> N. K. Fageria, M.P. Barbosa Filho, A. Moreira & C. M. Guimarães Foliar Fertilization of Crop Plants. In ''Journal of Plant Nutrition'' Volume 32, Issue 6, May 2009, pages 1044-1064 Published online: 5 May 2009</ref> The absorption takes place through their [[stomata]] and also through their [[epidermis (botany)|epidermis]]. Transport is usually faster through the stomata, but total absorption may be as great through the epidermis. Plants are also able to absorb nutrients through their bark. |
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Foliar feeding was earlier thought to damage [[tomato]]es, but has become standard practice. |
Foliar feeding was earlier thought to damage [[tomato]]es, but has become standard practice. |
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Revision as of 00:52, 29 December 2015
 | This article needs additional citations for verification. (April 2013) |
Foliar feeding is a technique of feeding plants by applying liquid fertilizer directly to their leaves.[1] Plants are able to absorb essential elements through their leaves.[2] The absorption takes place through their stomata and also through their epidermis. Transport is usually faster through the stomata, but total absorption may be as great through the epidermis. Plants are also able to absorb nutrients through their bark.
Foliar feeding was earlier thought to damage tomatoes, but has become standard practice.
Ocean-based sources
A popular version of the feeding is to use sea-based plant mixes, especially kelp, which contains many of the fifty "trace nutrients"; the more such nutrients are needed, the harder it is to balance them within the soil. Kelp also contains some hormones considered good for the development of the plants' leaves, flowers and fruit, of interest to organic gardeners who reject artificial hormone applications.
Effectiveness
H.B. Tukey was head of Michigan State University (MSU) Department of Horticulture in the 1950s. Working with S. H. Wittwer, they proved conclusively that foliar feeding is effective. Radioactive phosphorus and potassium were applied to foliage. A Geiger counter was used to observe absorption, movement and nutrient utilization. The nutrients were transported at the rate of about one foot per hour to all parts of the plants.[3]
Juice from plant leaves can be tested with a refractometer. If after feeding the amount of light refracted significantly rises, at least some nutrients have been absorbed. A spray enhancer can help nutrients stick to the leaf and then penetrate the leaves' cuticle.
Usage
Foliar feeding is generally done in evening, since heat causes the pores on some species' leaves to close.
Notes
- ^ Foliar Fertilization By George Kuepper, NCAT Agriculture Specialist, Published 2003, ATTRA Publication #CT135
- ^ N. K. Fageria, M.P. Barbosa Filho, A. Moreira & C. M. Guimarães Foliar Fertilization of Crop Plants. In Journal of Plant Nutrition Volume 32, Issue 6, May 2009, pages 1044-1064 Published online: 5 May 2009
- ^ Foliar Feeding Of Nutrients By Charlie O'Dell, March 2004 issue of American Vegetable Grower
Bibliography
- Peter Donelan. Foliar Feeding, Mother Earth News, May/June 1988.
- Robert L. Mikkelsen. Where Does Foliar Fertilization Fit In?, Plant Nutrition TODAY, International Plant Nutrition Institute (IPNI), Spring 2008, No. 3