This study examined how seedlings of deciduous tree species respond to fall fertilization during their hardening *** oak (Quercus variabilis) container seedlings were reared for 23 weeks pre-hardening under prescribed...
This study examined how seedlings of deciduous tree species respond to fall fertilization during their hardening *** oak (Quercus variabilis) container seedlings were reared for 23 weeks pre-hardening under prescribed fertility schedules with accumulated totals of 25,100,150 mg N/*** were sampled to determine their nutrient state pre-hardening,and were then fertilized during hardening with 0,12,and 24 mg N/seedling for 4 *** the seedlings without supplemental N during hardening,N increment in stem and root was 8.68,12.95 and 17.09 mg/seedling,*** N concentration in stem and root increased in spite of substantial growth during *** fact that fall fertilization was necessary to avert the nutrient dilution effects for evergreen tree species was not shared by deciduous trees.28.6%-34.7% of N was retranslocated from foliar tissues into the stem and root and accounted for 41.7%-87.0% of total N increment of stem and root,indicating that foliar N retranslocated averted N *** fertilization was more effective in increasing plant nutrient reserves when seedlings were low-level nutrient loaded at 25 mg N/*** the seedlings fertilized at 150 mg N/seedling pre-hardening,fall fertilization during hardening was toxic to stem dry mass and *** also strongly suggests that the role of fall fertilization during hardening on seedling quality could be influenced by the nutrient level pre-hardening.
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