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- W2574129086 abstract "Seasonal patterns of N uptake and allocation in Buxus microphylla , Acer × freemanii and Fothergilla gardenii were investigated for improving fertilization strategies. Rooted cuttings were planted to 3.5-L containers 25 May 1995. Plants were drip-irrigated on an as-needed basis with N at 50, 100, or 200 mg·L –1 solutions. Leaves, stems, and roots were destructively harvested every 6 weeks, starting 24 June. Net changes in dry weight and N uptake were determined for each of four, 6-week periods. Increasing N rate increased tissue N concentration in all species, and reduced root: shoot ratios in Acer and Fothergilla . Dry weights of Acer increased with N rate; whereas other species gave no positive response in dry weight beyond N at 100 mg·L –1 . Nitrogen at the 200-mg·L –1 rate caused severe injury to Fothergilla . Nitrogen uptake of the deciduous species increased in the first three periods, with greatest N uptake between 1 Sept. and 12 Oct. Greatest N uptake in Buxus occurred between 15 July and 1 Sept. Total N content in Buxus increased between 15 Oct. an 1 Dec. with a large proportion of N appearing to shift from leaf to stem tissue. In the other species, leaf abscission caused a net reduction in total N contents in the 100 and 200 mg·L –1 rates, although stem and root N contents increased. Increasing N rate in Acer delayed fall coloration but hastened leaf abscission. End-of-season N recovery (N taken up/N applied) was extremely low, and decreased with increasing rate of N. Acer had the highest recoveries (4.1%, 2.6%, and 2.0%) for low, medium, and high fertilizer rates, followed by Buxus (2.6%, 2.2%, 1.0%) and Fothergilla (1.7%, 1.8%, 0.4%)." @default.
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- W2574129086 date "1996-08-01" @default.
- W2574129086 modified "2023-09-24" @default.
- W2574129086 title "Seasonal Patterns of Nitrogen Use in Three Woody Ornamentals" @default.
- W2574129086 doi "https://doi.org/10.21273/hortsci.31.4.673e" @default.
- W2574129086 hasPublicationYear "1996" @default.
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