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- W2891515066 abstract "Chitosan has become of interest as a crop biostimulant suitable for use in sustainable agriculture since it is biocompatible, biodegradable, environmentally friendly, and readily available in large quantity. Short-term (35 d after transplanting) effects of chitosan, applied as a soil amendment at 0%, 0.05%, 0.10%, 0.15%, 0.20%, or 0.30% (w/w), on lettuce ( Lactuca sativa ) growth, chlorophyll fluorescence, and gas exchange were evaluated in a growth chamber study. Chitosan at 0.05%, 0.10%, and 0.15% increased leaf area from 674 to 856, 847, and 856 cm 2 , and leaf fresh weight from 28.6 to 39.4, 39.1, and 39.8 g, respectively. Only chitosan at 0.05% and 0.10% increased leaf dry weight from 3.42 to 4.37 and 4.35 g, respectively, while chitosan at 0.30% decreased leaf number, area, fresh and dry weight. Chitosan at 0.10%, 0.15%, 0.20%, and 0.30% increased leaf chlorophyll index from 29.8 to 34.4, 35.4, 37.5, and 41.4, respectively. Chitosan at 0.20% and 0.30% increased leaf maximum photochemical efficiency and photochemical yield, and chitosan at 0.10%, 0.15% 0.20%, and 0.30% increased leaf electron transport rate. Leaf photosynthesis rate and stomatal conductance ( g S ) increased from 9.3 to 12.7, 14.0, and 16.6 μmol·m −2 ·s −1 carbon dioxide, and from 0.134 to 0.183, 0.196, and 0.231 mol·m −2 ·s −1 , under chitosan at 0.15%, 0.20%, and 0.30%, respectively. The results indicated that chitosan, at appropriate application rates, enhanced lettuce growth, and might have potential to be used for sustainable production of lettuce." @default.
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- W2891515066 date "2018-08-01" @default.
- W2891515066 modified "2023-10-16" @default.
- W2891515066 title "Chitosan as Soil Amendment Affects Lettuce Growth, Photochemical Efficiency, and Gas Exchange" @default.
- W2891515066 doi "https://doi.org/10.21273/horttech04032-18" @default.
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