SUN Yue-bo,ZHAO Cong-kai,ZHAO Lan-yong.Response of Rosa rugosa Seedling Roots to Space Spatial Heterogeneous of Soil Water and Nutrient[J].Northern Horticulture,2013,37(02):162-165.
玫瑰幼苗根系对土壤水肥空间异质性的响应
- Title:
- Response of Rosa rugosa Seedling Roots to Space Spatial Heterogeneous of Soil Water and Nutrient
- 文章编号:
- 1001-0009(2013)02-0162-04
- Keywords:
- Rosa rugosa; root architecture; water; nutrient; space spatial heterogeneous
- 分类号:
- S 685.12
- 文献标志码:
- A
- 摘要:
- 以玫瑰幼苗为试材，采用基质培方法，研究了温室条件下玫瑰幼苗在土壤水肥空间异质条件下根构型特征、根系生物量的分布、地上部生长量、根冠比、细根直径及比根长等的特征。结果表明：玫瑰根系对养分和水分空间异质性反应敏感，空间异质性对玫瑰根系生长和分布影响明显；水肥空间异质性处理的玫瑰幼苗地上部及根系总量明显小于空间同质性，根冠比下降；在施肥区和浇水区根系生长快，生物量高，而在非施肥区和非浇水区根系生长受到抑制，生物量低；施肥区与非施肥区相比，细根直径减小，比根长大，有利于养分和水分的吸收运输，而非浇水区，虽然细根直径下降，但是比根长小，获取水分的能力下降，生物量低，导致细根直径下降，不利于植株生长。水分空间异质性对玫瑰生长的影响大于养分空间异质性。
- Abstract:
- Taking the seedling of Rosa rugosa as test materials,the medium culture was used,the effect of heterogeneous nutrient and water on root architecture，root mass distribution，top mass，R/S，fine root diameter and SRL in greenhouse were studied.The results showed that the root of Rosa rugosa was responded sensitively to water and nutrient heterogeneity，growth and distribution of root were affected obviously by space heterogeneity；growth quantity of up ground parts，total root and R/S treated in water and fertilizer heterogeneity were less than in homogeneity，and the R/S was reduced；roots grew quickly and total growth quantity was added clearly in fertilizer and irrigated area，and the growth were restrained in no nutrient and water area.Compared with the no fertilizer area，the diameter of fine root decreased and increased SRL,which were beneficial for absorbing and transporting of nutrient and water，in the no irrigation area，though diameter of fine root decreased，but the low SRL reduced the ability of absorbing water，reduced the total quantity of growth and then were bad to rose growing.Rose growing affected by water heterogeneity was more obviously than that by fertilizer heterogeneity.
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备注/Memo
第一作者简介：孙曰波（1971-），男，博士，副教授，现主要从事园林植物栽培生理等研究工作。E-mail：sunyb126@126.com.