摘要
为从光合特性、蒸腾特征、水分利用效率的角度了解不同草坪草生理生态特性,研究了6种北方草坪建植常用的苇状羊茅(Festuca arundinacea)、多年生黑麦草(Lolium perenne)、草地早熟禾(Poa pratensis)、狗牙根(Cynodon dactylon)、中华结缕草(Zoysia sinica)、野牛草(Buchloe dactyloides)在生长季内的光合速率、蒸腾速率和水分利用效率特点。结果表明:6种草坪草单叶活体的光合速率表现为气温(季节)作用大于草种,草坪草的光合速率高峰期多发生在夏季。冷季型草坪草的蒸腾速率大于暖季型草坪草,夏季时的蒸腾速率大于春秋季。冷季型草坪草中,蒸腾速率最大的是苇状羊茅,最小的是草地早熟禾;暖季型草坪草中,蒸腾速率最大的是狗牙根,最小的是野牛草。草坪草的水分利用效率在草种间存在差异,暖季型草坪草的水分利用效率显著高于冷季型草坪草。冷季型草坪草中,水分利用效率较高的是多年生黑麦草和苇状羊茅;暖季型草坪草中,水分利用效率最高的是中华结缕草,最低的为狗牙根。
The eco-physiological characteristics of photosynthesis rate, transpiration rate and water use efficiency of six turfgrass species grown in the north of China are studied. The six turfgrass species are the tall rescue （Festuca arundinacea ）, perennial ryegrass （Lolium. perenne ）, Kentuckybluegrass （ Poa pratensis ）, bermudagrass （ Cynodon dactylon ）, zoysiagrass （ Zoysia sinica）, buffalograss （Buchloe dactyloides）. Research results indicate that air temperature or seasonal factor has more effect on the leaf photosynthesis rate of the six turfgrass species than turfgrass species themselves, and the fastigium of the leaf photosynthesis rate are usually taken place in summer. The transpiration rate of cool-season turfgrass species are larger than that of warm-season and the transpiration rate of turfgrass species in summer condition are larger than those in spring and autumn conditions. The orders of cool-season turgrass species transpiration rate from high to low are tall fescue 〉 perennial ryegrass 〉 Kentucky bluegrass, and the orders of warm-season turfgrass species transpiration rate from high to low are bermudagrass〉 zoysiagrass〉 buffalograss. There are significant differences in water use efficiency among species and water use efficiency of warm-season turfgrass is larger than that of cool-season turfgras. These cool-season turfgrass species have the water use efficiency in the following orders： perennial ryegrass 〉 tall fescue 〉 Kentucky bluegrass. The orders of warm-season turfgrass species are zoysiagrass 〉 buffalograss 〉 bermudagrass.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2007年第2期42-46,共5页
Journal of Hebei Agricultural University
关键词
暖季型草坪草
冷季型草坪草
光合速率
蒸腾速率
水分利用效率
warm-season turfgrass
cool-season turfgrass
photosynthesis rate
transpiration rate
water use efficiency
