摘要
在2012年6-9月期间,以草地早熟禾草坪为对照,研究了3种土壤水分含量对■草草坪生态生理特征的影响,结论如下:1)■草最大草群高度低于20cm,平均分蘖数为63个/株,草屑量和根系量分别为草地早熟禾草坪的75.06%和58.54%,表现出明显的低高度、密丛生和对土壤营养物质低消耗的特点;2)同一水分处理下■草叶片含水量、游离脯氨酸含量都分别低于草地早熟禾,■草日均蒸腾速率是草地早熟禾的75.16%,日均水分利用率为草地早熟禾1.32倍,■草草坪群落日平均蒸散率比草地早熟禾草坪低24%左右;3)40%FC处理下■草草坪的株高、分蘖数、盖度、地下生物量都分别显著低于60%FC和80%FC水分处理,但各个生理指标在三个水分处理间均没有显著差异.
The effect of soil moisture on the eco-physiological characteristics of Koeleria cristata （K. cristata） turf was studied during June to September in 2012,while Poa pratensis （P. pratensis） turf was used as control. The results indicated that： 1） The grass height of K. cristata was below 20cm,while its average tiller number was 63 per plant. Moreover,K. cristata＇s grass clipping pro- duction and root biomass were only 75.06% and 58.54% of P. pratensis＇s respectively, indicating that it had the characteristics of low height, densely cluster and low soil nutrition consumption. 2） The leaf water content,free proline content of K. cristata were significant lower than P. pratensis, while the average daily transpiration rate and the average water utilization efficiency of K. cristata were 75.16% and 1.32 times of P. pratensis under the same soil moisture. The daily evapotranspi- ration rate of K. cristata turf was 24% lower than P. pratensis turf. 3） The grass height,tiller num- ber,coverage rate,underground biomass of K. cristata turf under 40% field water-holding capacity （FC） were significantly lower than that under 60% and 80%FC in water treatment,but those physi- ological parameters had no significant differences among the three treatments.
出处
《内蒙古大学学报（自然科学版）》
CAS
北大核心
2015年第6期595-599,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古大学草地生态学重点实验室资助项目
关键词
■草草坪
土壤水分含量
生理生态学特征
Koeleria cristata turf
soil water content
eco-physiological characteristics
