Phosphorus Fertility Part 3: Reproductive Stage P Deficiency скачать в хорошем качестве

Phosphorus Fertility Part 3: Reproductive Stage P Deficiency

Josh Henry, graduate student at North Carolina State University shares the findings of his master’s research investigating low phosphorus fertilization of floriculture crops. In part three of this three-part presentation, Josh discusses symptoms of a reproductive stage phosphorus deficiency that occur on the upper foliage of plants with developing flowers or fruit. Phosphorus deficiency symptoms typically develop on the lower foliage, and these upper leaf symptoms had not previously been associated with a phosphorus deficiency. These unusual symptoms occur when plants are supplied with a low but sufficient rate of phosphorus for the first half of the production cycle, followed by a period of limited phosphorus during reproduction. These specific conditions lead to competition between two sinks: the flowers/fruit and the upper leaves. In this scenario, the limited phosphorus bypasses the upper foliage in favor of the reproductive tissues, ultimately resulting in this upper leaf symptomology. The results and recommendations determined from this research can help you to successfully implement a low phosphorus fertilization program while avoiding these devastating symptoms. For more information about this research, please read the associated article in the September 2017 issue of GrowerTalks magazine. September 2017 Issue, ‘Phosphorus Deficiency on Upper Leaves?’ Link: https://www.growertalks.com/Article/?... You can also find more detailed information from Josh’s thesis, ‘Beneficial and Adverse Effects of Low Phosphorus Fertilization of Floriculture Species’ PDF Link: https://repository.lib.ncsu.edu/bitst...