摘要
以5种草坪草为试材，通过盆栽模拟大田试验，研究了充足灌水和限制灌水条件下草坪草的蒸发规律；测定了干旱胁迫下草坪草的叶片相对含水量、叶绿素含量、外观质量等指标，结果表明：草坪草蒸散量日变化与温度变化规律相一致，在午后12：00～14：00时达到最高值，65％～70％的蒸散量集中在10：00-16：00；充分灌水和限制灌水2种条件下，草坪草的月平均蒸散量均表现为：高羊茅〉多年生黑麦草〉草地早熟禾〉狗牙根〉日本结缕草，冷季型草坪草大于暖季型草坪草；干旱胁迫下，草坪草的叶片含水量和外观质量均呈下降趋势，而叶绿素含量先增后减，在第3天达到最大值，此时的土壤含水量为最适含水量，体积百分比约为25％～28％。
Taking 5 kinds of turf grass as materals, through simulation field trials by experiment of potted plant, the evapotranspiration characteristics of five kinds of turfgrass under sufficient irrigation and limited irrigation treatments were studied,and ET of five kinds of turfgrassunder full irrigation and limited irrigation conditions and the leaf water content,chlorophyll content, the comprehensive evaluation of five turfgrass under limited irrigation were measured. The results showed that the daily ET varations were positively correlated with temperature, the maximum ET appeared on 12.00 to 14：00 in the afternoon and about 65%-70% of ET happened at 10：00-16：00. The order of five kinds of turfgrass on experiment under sufficient irrigation and limited irrigation conditions by average monthly ET were Festuca arundinacea 〉Lolium perenne 〉 Poa pratensis 〉 Cynodon dactylon 〉 Zoysia japonica. The ET of cold-season turfgrass was higher than warm-season turfgrass under both water conditions. When soil moisture was in dry condition, the leaf water content and the appearance of quality were decreased. However, the chlorophyll content of five turfgrass species increased and then descended during limited irrigation condition and the maximum appeared on the third day. At this time,the soil moisture was the optimum.about 25%-28%Vol.
出处
《北方园艺》
CAS
北大核心
2014年第2期71-75,共5页
Northern Horticulture
基金
国家自然科学基金资助项目(31100512)
山东省青年基金资助项目(BS2012NY005)
山东省高等学校青年骨干教师国内访问学者资助项目
关键词
草坪草
蒸散量
限制灌水
生理指标
外观质量
turfgrass
evapotranspiration
limited irrigation
physiological index
appearance quality
