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[Impacts of shading on seedling growth and mineral accumulation in ].

作者信息

Zhan Li-Jie, Zhang Hong-Bao, Li Zong-Tai, Meng Wei, Xu Wei, Li Ling-Hao

机构信息

Cotton Research Center, Ji'nan 250100, China.

Shandong Academy of Forestry Sciences, Ji'nan 250014, China.

出版信息

Ying Yong Sheng Tai Xue Bao. 2020 Oct;31(10):3473-3479. doi: 10.13287/j.1001-9332.202010.029.

DOI:10.13287/j.1001-9332.202010.029

PMID:33314837

Abstract

Shading is one of the important strategies to protect seedlings of The effects of shading treatments on seedling growth and mineral accumulation of Duolun were investigated in a greenhouse experiment to provide guidance for cultivation. One week after emergence, seedlings were treated with 20%, 40%, 60% or 80% shading for two months, with no-shading as the control (CK). The results showed that shading treatments significantly increased plant height by 19.9%, 31.1%, 52.9%, and 63.7%, respectively. However, shading significantly reduced the root mass ratio and root to shoot ratio by 21.5%, 23.6%, 29.2%, 41.8% and 40.6%, 44.0%, 50.9%, 63.2%, respectively. Moreover, 40%, 60% and 80% shading significantly increased specific leaf area by 77.0%, 84.1% and 65.2%, and significantly increased chlorophyll content by 92.3%, 128.7%, 98.1%, and increased carotenoid content by 86.9%, 113.1% and 90.5%, respectively. The treatments of 40%, 60%, and 80% shading significantly decreased root biomass by 61.4%, 74.3% and 78.6%, respectively. Compared with CK, 20%, 40% and 80% shading, the 60% shading treatment increased root phosphorus content by 245.7%, 65.9%, 40.5% and 10.3%, increased potassium content by 102.9%, 131.7%, 57.0%, 63.3% and magnesium content by 131.3%, 55.1%, 40.4%, 7.7%, respectively. 60% shading was an appropriate shading intensity for seedling cultivation based on local conditions in Duolun.

摘要

遮荫是保护多伦幼苗的重要策略之一。通过温室试验研究了遮荫处理对多伦幼苗生长和矿物质积累的影响，为栽培提供指导。出苗一周后，对幼苗进行20%、40%、60%或80%的遮荫处理，为期两个月，以不遮荫作为对照（CK）。结果表明，遮荫处理使株高分别显著增加了19.9%、31.1%、52.9%和63.7%。然而，遮荫使根质量比和根冠比分别显著降低了21.5%、23.6%、29.2%、41.8%和40.6%、44.0%、50.9%、63.2%。此外，40%、60%和80%的遮荫显著增加了比叶面积，分别增加了77.0%、84.1%和65.2%，显著增加了叶绿素含量，分别增加了92.3%、128.7%、98.1%，类胡萝卜素含量分别增加了86.9%、113.1%和90.5%。40%、60%和80%的遮荫处理分别使根生物量显著降低了61.4%、74.3%和78.6%。与CK相比，20%、40%和80%的遮荫处理中，60%的遮荫处理使根磷含量分别增加了245.7%、65.9%、40.5%和10.3%，钾含量分别增加了102.9%、131.7%、57.0%、63.3%，镁含量分别增加了131.3%、55.1%、40.4%、7.7%。基于多伦当地条件，60%的遮荫是适合幼苗栽培的遮荫强度。