土壤持续干旱条件下早开堇菜与草地早熟禾对土壤水分利用特征的比较研究

北方农业学报 ›› 2008, Vol. ›› Issue (1): 28-28.

土壤持续干旱条件下早开堇菜与草地早熟禾对土壤水分利用特征的比较研究

王丽娜王艳荣张玮周澎

内蒙古大学生命科学学院,内蒙古呼和浩特010021

出版日期:2008-02-20 发布日期:2008-02-20
通讯作者: 王丽娜
作者简介:王丽娜（1983-），女（蒙古族），内蒙古赤峰人，内蒙古大学硕士，研究方向为草业科学。通讯作者：王艳荣（1964-），女，内蒙古海拉尔人，教授，博士，内蒙古大学硕士生导师，主要从事植被生态学领域和草坪资源开发利用的研究。
基金资助:
内蒙古自治区自然科学基金（200408020522）

Comparative Study on Soil Water Utilization Characteristics of Viola Poapratensis and Poa Pratensisl L. Populations under Long-term Soil Drought Stress

WANG Li-na （College of Life Science Inner Monglia University,Huhhot 010021,China）

Online:2008-02-20 Published:2008-02-20

摘要/Abstract

摘要： 在2006年7月至9月期间．研究了在土壤持续干旱条件下早开堇莱种群和草地早熟禾种群的蒸腾失水过程和对土壤水分利用的特征。结果表明：（1）在植物只发生蒸腾作用的情况下，草地早熟禾种群和早开堇菜种群平均存活天数分别为46d和41d；在植物发生蒸散的情况下，两者平均存活天数分别为23d和24d。（2）在土壤含水量高于75％～80％田间持水量时。草地早熟禾种群的日蒸腾量大于早开堇菜种群；在土壤含水量波动于30％。80％时，早开堇莱种群的日蒸腾量高于草地早熟禾。（3）早开堇莱的萎蔫系数小于草地早熟禾。（4）在持续干旱条件下早开堇菜和草地早熟禾种群对土壤水分利用率分别为78．03％和70．00％；在0—5cm，5-10cm，10-15cm^3个土层上．早开堇莱种群的水分利用率都高于草地早熟禾。

Abstract: The evapo-transpiration dynamics and soil water utilization characteristics of Viola poapratensis and Poa pratensisl populations were studied under long-term soil drought stress from July to September in 2006.The results showed：（1）the average survival days of Poa pratensisl and Viola poapratensis populations were 46d and 41d,respectively,under evapo-transpiration,in contrast,the average survival days were 23d and 24d,respectively,in nomal conditions.（2）The evapotranspiration per day of Poa pratensisl population were higher than that of Viola poapratensis when soil moisture were beyond 75% and 80%.But when soil water fluctuated from 30% to 80%,the evapo-transpiration per day of Viola poapratensis were higher than Poa pratensisl population.（3） Wilting coefficient of Viola poapratensis was lower than that of Poa pratensisl population. （4）The soil moisture utilization rate of Viola poapratensis and Poa pratensisl population were 78.03% and 70.00%,respectively,under long-term soil drought stress The soil water utilization rate of Viola poapratensis were higher than that of Poa pratensisl population.among 0-5cm,5-10cm and 10- 15cm soil layers.

中图分类号:

S562 S688.4

王丽娜王艳荣张玮周澎. 土壤持续干旱条件下早开堇菜与草地早熟禾对土壤水分利用特征的比较研究[J]. 北方农业学报, 2008, (1): 28-28.