文献类型：期刊文献

英文题名：Quality assessment and nutrient uptake and utilization in Luohan pine (Podocarpus macrophyllus) seedlings raised by chitosan spraying in varied LED spectra

作者：Song, Qiyan[1] Xu, Liang[2] Long, Wei[3] Guo, Jia[4] Zhang, Xie[5]

第一作者：Song, Qiyan

通信作者：Xu, L[1];Long, W[2]

机构：[1]Zhejiang Acad Forestry, Inst Forest Protect, Hangzhou, Peoples R China;[2]Zhejiang Acad Forestry, Forest Food Res Inst, Hangzhou, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Peoples R China;[4]Chengbang Ecoenvironm Inc, Hangzhou, Peoples R China;[5]Hunan Acad Forestry, Inst Bot, Changsha, Peoples R China

年份：2022

卷号：17

期号：4

外文期刊名：PLOS ONE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000794035700012)】；

基金：This research was funded by Project of Development and Research on Unordinary Ornamental Trees (grant number, 2018HX014), Bamboo industry promotion project of Jingning (grant number, 2016HX025), and the Fundamental Research Funds for the Central Public Welfare Scientific Research Institutes (grant number, CAFYBB2017SY016). The funder provided support in the form of salaries for the author, Jia Guo, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of the author are articulated in the `author contributions' section.

语种：英文

摘要：Target seedling cultivation pursues high quality and nutrient utilization instead of increasing growth and size. Exposure to light-emitting diode (LED) spectra is a well-known approach that can accelerate growing speed in tree seedlings, but it is still unknown whether seedling quality and nutrient utilization would be further improved with exogeneous polymer additives. Luohan pine (Podocarpus macrophyllus) seedlings were exposed to red (red-green-blue lights, 71.7%-13.7%-14.6%), green (26.2%-56.4%-17.4%), and blue (17.8%-33.7%-48.5%) LED-light spectra with half receiving leaf spray by chitosan oligosaccharides (Cos) at a rate of 2 ppm (w/w) and the other half receiving only water. The red-light spectrum promoted height, biomass, nutrient utilization, and quality assessment (DQI) in water-sprayed seedlings. The Cos spray enhanced fine-root growth, protein, and chlorophyll-b contents with elevated nutrient utilization and quality in seedlings in the green-light spectrum. DQI was found to have a positive relationship with phosphorus utilization. In conclusion, although the red-light LED spectrum can promote seedling growth, green light combined with Cos spray is recommended with the aim of maintaining seedling quality and increasing P utilization in Luohan pine seedlings.