林业科学Issue(11)：188-196,9.DOI:10.11707/j.1001-7488.20141125
补光对青海云杉家系幼苗生物量和矿质元素的影响
Effects of Supplemental Light on Biomass and Mineral Element Content of Seedlings From Nine Families in Picea crassifolia
摘要
Abstract
Supplementing light in the night can efficiently promote the seedlings growth of Picea crassifolia,but the families genetic variation with supplemental light and the relationship between seedlings growth and mineral elements content were not clear. In this study,we explore the effects of extending lighting time on seedling growth and nutrition absorption,and analyze the response of the family genetic difference to light supplemental. The biomass and mineral element content of nine families from superior trees in P. crassifolia with supplemental light were investigated in growing and bud set period. The results showed that biomass and mineral element content were significantly affected by family, lighting time and interacted by family and lighting time. The biomass of P. crassifolia was increased with supplemental light treatment,and the aboveground biomass and underground biomass were 2. 01 and 1. 54 times higher than that of the control,respectively. The seedlings with higher growth rate had lower N:P ratio which was mainly affected by the P content. The N:P ratio of seedlings with supplemental light (7. 71) was significantly lower than that of the control (9. 05) in July. There was a significant negative correlation between the P content and the aboveground biomass. With increased seedling growth promoted by supplemental light,the P content was probably diluted in synthesizing RNA and protein. Thus,it is necessary to apply phosphate fertilizer to seedlings with supplemental light. The family genetic differentiation and phenotypic plasticity to lighting time together brought about the different responses of different families in biomass and nutrient element content to the supplemental light,which makes it possible to select superior family under supplemental light.关键词
青海云杉/家系/幼苗/补光/生物量/矿质元素Key words
Picea crassifolia/family/seedlings/supplmental light/biomass/mineral elements content分类
农业科技引用本文复制引用
欧阳芳群,王军辉,贾子瑞,李悦,仲永芳,祁生秀..补光对青海云杉家系幼苗生物量和矿质元素的影响[J].林业科学,2014,(11):188-196,9.基金项目
农业科技成果转化资金项目(2010GB24320611)。 （2010GB24320611）
