Lettuce (Lactuca sativa L.) is the most greatly eaten leafy vegetable worldwide. In the latest a long time, hydroponics lettuce manufacturing has greater in Florida. Inspite of the lessen pest, disorder, and weed pressure, and the reduction of h2o and nutrient specifications, the rising charges of fertilizers, such as phosphorus (P), present a important hurdle for hydroponic lettuce output. Pinpointing lettuce genotypes capable of making higher yields with minimal P inputs may possibly support reduce fertilizer use, creation expenses, and excess P in wastewater. The objective of this analyze was to determine lettuce genotypes that use P much more successfully in a hydroponic technique.
Two greenhouse experiments were performed at the College of Florida/IFAS Everglades Analysis and Instruction Centre in Belle Glade, FL. In every experiment, 12 lettuce genotypes: romaine (6) crisphead (5) and bibb (1) kinds have been grown in two nutrient lm technique (NFT) programs. Just about every program contained a modified Howard Resh remedy in addition just one P treatment method: either low P (3.1 ppm) or superior P (31 ppm). Phosphorus was equipped in the variety of phosphoric acid (H3PO4), with all other macro and micronutrients retained regular. Methods have been changed every 14 times to steer clear of nutrient imbalance.
Electrical conductivity and pH of methods ended up modified to the ranges of 1.4 to 1.8 mS/cm and 6. and 6.5, respectively. The genotypes ended up replicated three instances in just about every NFT program, with just about every replicate consisting of a one plant. Seedlings ended up started out in rockwool cubes and transplanted into the NFT 11 times after sowing. Vegetation have been harvested at horticultural maturity to measure refreshing body weight [FW (g)] of shoots and roots and tipburn incidence. After shoot and root tissues ended up oven-dried at 65 °C for 7 times to receive dry body weight [DW (g)], then the root-shoot DW ratio was calculated. Tissue total-P concentration [TTP (mg·g-1)]was measured in Experiment 1 only, subsequent a hydrochloric acid extraction and assessment applying an inductively coupled plasma optical emission spectrometer (ICP-OES).
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Kreutz, Gustavo & Bhadha, Jehangir & Sandoya, Germán. (2022). Lettuce Cultivated in Hydroponics Responds to Fewer Phosphorus Inputs.