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Nutrients: Difference between revisions
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Nutrients can broadly be categorized by micro or macro and in terms of their mobility; either mobile or immobile. Mobile nutrients are those that the plant can move around to where they are most needed while immobile nutrients cannot be relocated. This mobility of the nutrient affects where [[Symptoms of bad health|symptoms of deficiency]] (or excess) can occur on a plant. Mobile nutrient deficiencies will appear on older leaves first and vice versa.
== Buying fertilizer ==
==== Silica ====
Silicon dioxide or "Silica" can increase stem diameter and boost chlorophyll production.<ref>https://www.maximumyield.com/simply-silica/2/1077</ref> Found in Diatomaceous earth.
==== Magnesium ====
=== Acids ===
Acids
==== Amino Acids ====
=== Enzymes ===
Enzymes help speed up the
A
==== '''Amylase''' ====
==== Chitin ====
A key component of insect exoskeletons, shells of crustaceans, fungi, and components of other invertebrates. In plants, it benefits pest and disease resistance as well as being a strong [[Nutrients#Chelation|chelator]] and increasing the production of secondary metabolites.
==== Molasses and oligosaccharides ====
=== Plant Growth Regulators (PGRs) ===
PGRs are a group of hormones that are used to increase the density of buds and reduce plant height. There are organic PGRs but there are also a number of synthetic PGRs that are known to be carcinogenic and toxic to the liver. PGRs are generally not recommended for use on cannabis unless you know exactly what the PGRs are and how they were sourced.
=== Trianconatol ===
A phytohormone found in Alfalfa that acts as a stimulant. It increases the rate of photosynthesis by increasing the production of chlorophyll, and assimilation of CO<sub>2</sub>. It also increases the rate of cell growth and reduces stress.
== Chelation ==
Chelation is the bonding of organic compounds with metal ions, for example, humic acid and iron. When chelated, the organic compound encapsulates the metal (an example of a micronutrient) forming a shield that protects it. This not only increases the solubility of the nutrient, and thus absorption in the plant, but it also prevents the metal from being lost through runoff or from oxidating before it reaches the plant. Chelators can even expand the bioavailability of nutrients beyond the typical pH required for absorption.
More on chelation at Maximum yield: [https://www.maximumyield.com/understanding-chelation-in-plants/2/17808 Understanding Chelation in Plants] and [https://www.maximumyield.com/the-chelation-effect/2/1137 The Chelation Effect: Maximizing Plant Growth].
== The sequence of nutrition ==
===Nutrient lockout===
[[File:SoilpHNutrientLockout.png|thumb
Nutrient lockout occurs when the pH is too high or too low for the plant to properly absorb nutrients. This leads to a deficit of necessary nutrients for growth and/or survival. A nutrient lockout can also occur when the grow medium accumulates too much salt or other nutrients.
===Foliar Spray===
Nutrients can be delivered to the plant when dissolved in water via a fine mist, this is the fastest route of administration. It has been postulated that the size of the droplets has an effect on the efficacy of foliar spray but some studies seem to contradict this<ref>Influence of Droplet Size of Foliar-Applied Nitrogen on Grain Protein Content of Hard Red Winter Wheat 2017 -https://acsess.onlinelibrary.wiley.com/doi/pdf/10.2134/cftm2016.10.0068</ref>. If possible the spray should be applied to the underside of leaves as this is where most stomata reside. Lights should be turned off before foliar spraying to prevent the light from lensing through droplets and burning the leaf surface.
Foliar spray should not be used to provide emergency nutrients to the plant.
== Flushing ==
In the last two weeks before harvest, a plant should be fed water with no added nutrients/fertilizer. This is to ensure the cultivar is able to metabolize all nutrients it has absorbed from the soil.<ref>https://www.youtube.com/watch?v=qPh285tuVHw&ab_channel=TheGanjier Simon Hart, The Ganjier @ 13:08</ref> This leads to a smoother smoke containing less damaging compounds. The color of the ash left by burning cannabis can indicate how much fertilizer is present and if the plant was flushed or not. White ash indicates low amounts of excess nutrients
==References==
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