文献类型：期刊文献

英文题名：Exponential fertilization on red-seed tree (Ormosia hosiei) seedlings subjected to contrasting light conditions: Do we really need intensive nutrient loading?

作者：Chu, Xiuli[1,2] Luo, Xianyou[3] Zhou, Zhichun[1]

第一作者：楚秀丽;Chu, Xiuli

通信作者：Zhou, ZC[1]

机构：[1]Chinese Acad Forestry, Zhejiang Prov Key Lab Tree Breeding, Res Inst Subtrop Forestry, Hangzhou 31140, Peoples R China;[2]Shanghai Bot Garden, Shanghai Engn Res Ctr Sustainable Plant Innovat, Shanghai 200231, Peoples R China;[3]Forestly Acad Longquan City, Lishui 323700, Peoples R China

年份：2021

卷号：49

期号：2

起止页码：1-15

外文期刊名：NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000687297100015)】；

基金：Authors thank Prof. Rongzhou Man, from Ontario Forest Research Institute in Canada, for the polishing work and suggestions for the paper. This work was supported by Forestry Science and Technology Cooperation Project between Zhejiang Province and Chinese Academy of Forestry (grant number 2017SY19) .

语种：英文

外文关键词：antioxidant; nutrient loading; nursery culture; red-seed tree; vulnerable species

摘要：Exponential fertilization (EF) can feed seedlings with more nutrients than needed for growth and continuous lighting is expected to reduce the risk of loading at high application rate. In this study, red-seed tree (Ormosia hosiei Hemsley & E. H. Wilson) seedlings were raised by EF at a low rate of 160 mg nitrogen (N) plant-1 (conventional) (N-phosphorus [P]-potassium [K], 12-9-12) and a high rate of 600 mg N plant-1 (intensive), which was adapted from previous studies with large-pot-seedlings. Both fertilizer regimes were nested to either of two light spectra from high-pressure sodium (HPS) and light-emitting diode (LED) sources with three replicates for each combined treatment. Seedlings subjected to the conventional regime in the LED spectrum showed better growth and greater biomass accumulation with higher leaf N and P contents than other ones. In the conventional fertilizer regime, the LED spectrum also resulted in higher photosynthesis shown by more pigments and higher N synthesis than the HPS spectrum. The HPS spectrum strengthened P synthesis in the intensive regime. The antioxidative activity was stimulated by a high dose of EF, hence excessive toxicity was likely induced. We recommend using the normal rate of 160 mg N plant-1 for the culture of red seed tree seedlings with LED lighting to promote seedling quality without causing excessive nutrient toxicity.