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林业科学 ›› 2007, Vol. 43 ›› Issue (09): 18-22.doi: 10.11707/j.1001-7488.20070904

• 论文及研究报告 • 上一篇    下一篇

北京4种常见园林植物的水分分级管理*

王瑞辉1,2 马履一2 奚如春2 樊敏2 李丽萍2   

  1. 1.中南林业科技大学 长沙410004;2.北京林业大学 北京 100083
  • 收稿日期:2006-11-21 修回日期:1900-01-01 出版日期:2007-09-25 发布日期:2007-09-25

Controlled Water Supply of Four Species of Landscape Plants in Beijing

Wang Ruihui1,2,Ma Luyi2,Xi Ruchun2,Fan Min2,Li Liping2   

  1. 1 Central South University of Forestry and Technology Changsha 410004;2 Beijing Forestry University Beijing 100083
  • Received:2006-11-21 Revised:1900-01-01 Online:2007-09-25 Published:2007-09-25

摘要:

用盆栽和蒸散皿分别对大叶黄杨、金叶女贞、铺地柏3种灌木和草地早熟禾进行控水试验,测定土壤干旱胁迫过程中植物的蒸腾速率,观测外貌变化,据此将4种灌草植物的水分管理分为特级、一级和二级。特级为充分供水,植物生长旺盛,灌木和草坪的土壤水势分别为-0.24~-0.08 Mpa和-0.07~-O.02 Mpa;一级为轻度缺水,植物蒸腾减弱,但生长正常,外观未见明显的干旱胁迫症状,灌木和草坪的土壤水势分别为-O.48~-0.24 Mpa和-0.18~-0.07 Mpa;二级为中度缺水,植物出现短暂萎蔫,但对观赏效果影响不大,灌木和草坪的土壤水势分别为-1.41~-0.48 Mpa和-0.78~-0.18 Mpa。植物水分分级管理有利于提高水分利用效率,节约水资源。

关键词: 城市绿化, 节水灌溉, 蒸腾速率, 水分管理, 北京

Abstract:

Water controlling experiment was conducted to study the transpiration rate of Pea pratensis and three shrubs including Euonymus japonicus、Ligustrum×vicaryi、Sabina procumbens by pot experiment and microlysimeter under soil moisturestress.Grade of water supply of these plants was divided into three grades:super grade,grade 1 and grade 2 according toobservation data.Super grade refers to sufficient water supply,under this condition plants flourish and soil water potentials of shrubs and turf are respectively-0.24~-0.08 Mpa and-0.07~-0.02 Mpa.Grade 1 means slightly water deficiency。Under this condition plants grow normally and their transpiration rates decrease without responses against moisture stress,the water potential is respectively-0.48~-0.24 Mpa and-0.18~-0.07 Mpa.Grade 2 is medium water deficiency,that is,soil water potentials are respectively-1.41~-0.48 Mpa and-0.78~-0.18 Mpa and plants appear temporary wilting without influence on ornamental effect.Controlled water supply can increase efficiency of water use and save water resource.

Key words: urban landscaping, irrigation of water saving, transpiration rate, water management, Beijing