内蒙古民族大学学报（自然科学版）2024，Vol.39Issue(2)：32-38,7.DOI:10.14045/j.cnki.15-1220.2024.02.006
模拟氮沉降对刺萼龙葵幼苗生长与生物量的影响
Effects of Simulated Nitrogen Deposition on Growth and Biomass on Seedlings of Solanum rostratum Dunal.
摘要
Abstract
The study investigates the growth and allocation characteristics of the invasive plant Solanum rostra-tum seedlings under nitrogen deposition.Two nitrogen deposition methods were employed:ammonium nitrogen((NH4)2SO4),denoted as A,and nitrate nitrogen(NaNO3),denoted as B.Four nitrogen deposition levels were tested:0,4,8,and 10 g/(m2·a),labeled as 1,2,3,and 4,respectively.Results indicate that the plant height of Solanum ros-tratum seedlings remained unaffected by nitrogen deposition.All nitrogen deposition treatments significantly reduced the root diameter of the seedlings,with treatment level 13 being the lowest at 0.74 cm.Both the interaction effect and ammonium nitrogen treatment significantly decreased the stem diameter of the seedlings,with treatment level 14 being the lowest at 1.04 cm.Additionally,all nitrogen deposition treatments significantly increased the specific leaf area of the seedlings,with treatment level 10 being the highest at 23748.41 mm2/g.Under ammonium nitrogen treat-ment,treatment level 13 decreased the root,stem,leaf and total biomass of Solanum rostratum seedlings.Under the interaction of treatment level 16,the ratio of root,stem,leaf and leaf biomass and root-shoot ratio of Solanum rostra-tum seedlings were decreased.Except for treatment level 16,the other interactions increased the ratio of leaf bio-mass and root-shoot ratio.These findings suggest that concentrations of 4-8 g/(m2·a)of ammonium nitrogen promote the accumulation and distribution of biomass in Solanum rostratum Dunal.seedlings,facilitating invasion,while con-centrations of 10 g/(m2·a)inhibit biomass accumulation and distribution,thereby suppressing growth and impeding invasion.关键词
氮沉降/刺萼龙葵幼苗/生物入侵/生长特征Key words
Nitrogen addition/Solanum rostratum Dunal.seedlings/biological invasion/growth characteristics分类
农业科技引用本文复制引用
张佳,王雪丽,王鹤松,王鹏,王竹天,周立业..模拟氮沉降对刺萼龙葵幼苗生长与生物量的影响[J].内蒙古民族大学学报（自然科学版）,2024,39(2):32-38,7.基金项目
2023年内蒙古自治区直属高校项目(GXKY23Z081) （GXKY23Z081）
内蒙古自治区重点研发和成果转化项目(2022YFDZ0028) （2022YFDZ0028）
