Does rinsing rice water need to ferment before watering plants?
Amateur gardeners often use rinsing rice water as a natural fertilizer, but using it directly may do more harm than good. Proper fermentation not only avoids the risk of root burn but also releases nutrients to form high-quality acidic fertilizer, which significantly promotes the growth of acid-loving plants.
The Necessity and Scientific Principles of Fermentation
The Key Stage of Nutrient Transformation
Fresh rinsing rice water contains a large amount of starch particles and organic matter, which can form a barrier around the roots when used directly, hindering respiration. Fermentation in a sealed container can break down amino acids, organic acids, and trace elements. Experimental data shows that the pH value stabilizes at 5.8-6.5 after fermentation, which is particularly suitable for acid-loving plants like gardenia and jasmine.
Standardized Fermentation Operation Process
Preparation of Environment and Materials
Choose a transparent plastic bottle, leaving 20% space, and add orange or pineapple peels to suppress odors. It is recommended to mix rinsing rice water with tap water in a 1:3 ratio. In northern regions during winter, the fermentation period should be extended to 35 days, while in summer, it should be shortened to about 12 days.
Techniques for Releasing Gas
The first three days require opening the lid daily to release gas. Using a brewing bottle with a one-way valve is safer. When the white froth layer on the surface of the liquid stops forming, it indicates that the anaerobic reaction is essentially complete.
Judgment of Decomposition Level and Usage Specifications
Visual and Olfactory Inspection
Quality fermented liquid is amber-colored and transparent, with sediments not exceeding 1/5 of the bottle. A qualified product has a faint fruity acid smell; if there is a pungent smell of decay, it indicates contamination with spoilage bacteria and should be discarded.
Scientific Dilution Ratio
When using, dilute with water at a ratio of 1:15. Apply weekly in spring and autumn, and every 10 days in summer. For woody plants like camellias and azaleas, the concentration can be slightly increased, while for herbaceous plants like pothos, it is recommended to reduce the concentration to 1:20.
After 30 days of observation, the number of flowers on gardenias increased by 40% when using fermented rinsing rice water correctly, and the leaf thickness increased by 0.3mm. It is particularly important to note that succulents, orchids, and cacti should not be used, as their roots cannot adapt to an organic acid environment. Regularly using iron sulfate can maintain soil acidity balance.