不同灌水处理对高羊茅草坪蒸散量和光合特性的影响  

Effect of Different Irrigation Treatments on ET and Photosynthetic Characteristic of Festuca Arundinace Turf

作　　者：高凯[1] 朱铁霞[1] 郭志杰 李红梅[3] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043 [2]通辽市植保植检站,内蒙古通辽028000 [3]通辽职业学院,内蒙古通辽028000

出　　处：《内蒙古民族大学学报（自然科学版）》2007年第4期404-408,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

摘　　要：通过对不同灌水处理条件下高羊茅的蒸散量、光合蒸腾日变化的测定,研究植物生理日变化与土壤水分之间的关系.试验结果表明:充分灌水条件下高羊茅的蒸散量明显高于限制灌水;不同水分梯度下,高羊茅的蒸散量随土壤含水量的降低而减少;不同灌水条件下,蒸散量日变化呈双峰变化,一天内主要集中在11:00到15:00之间;高羊茅净光合、蒸腾速率日变化曲线均为单峰型,且充分灌水条件下的净光合、蒸腾速率高于限制灌水.　Effect of different irrigation treatments on ET,photosynthetic rate and transpiration rate＇s diural variatin of Festua arundinaea turf was studied.The results showed that the ET of Festuca arundinacvea was significantly higher under sufficent irrigation than under limit irrigation,Under different soil water content grades,the ET of Festuca arundinacea dripped with the decrease of soil moisture.The ET in one day showed a trend of bimodal curve,and the transpiration in one day is mainly concentrated from 11：00 to 15：00.The net photosynthetic rate and the transpiration rate all unimodal in one day,and they were both higher under sufficent irrigation than under limit irrigation.

关 键 词：蒸散量 光合速率 蒸腾速率 灌溉 高羊茅 

分 类 号：Q945[生物学—植物学]