草地早熟禾品種間生理有效水閾值和耐旱性的比較研究.pdf

1、 分類號 S731.2 學(xué)校代碼 10129 U D C 626.8 學(xué) 號 2013204074 草地早熟禾品種間生理有效水閾值和耐旱性的比較研究 Comparative Study on Physiological Effective Water Threshold and Drou

2、ght Resistance of Kentucky Bluegrass Varieties 申 請 人：柴慧娜 學(xué)位類別：農(nóng)業(yè)推廣碩士 領(lǐng) 域：草 業(yè) 指導(dǎo)教師：王建光 教授 論文提交日期：二〇一五年六月 Comparative Study on Physiological Effective Water Threshold and Drought Resistance of Kentucky Bluegrass Varie

3、ties Abstract In recent years, the lack of water resources become a general existence problem in the current and future, and in many cities, lawn irrigation without planning and management is relatively extensive, which

4、cause a lot of water waste. Therefore, it is very important to master the water demand and water consumption law and other water-saving methods. In the hope of finding out the effective physiological water threshold va

5、lue of Kentucky bluegrass and the drought resistant variety through the analytic hierarchy process, so then improving a reasonable utilization of water resources in arid and semi-arid regions. Beginning in april 2014,thr

6、ough the study of 4 varieties of Kentucky Bluegrass after wilting, Watering by gradients(100%FC,80%FC,60%FC,40%FC), and so on, some indexes, including soil water content, aboveground biomass, underground biomass

7、,the time for recover after wilting, and the landscape maintenance time, were measured and compared similarities and differences between 100%FC and other moisture treatments to find out the physiological effective water

8、threshold value of Kentucky bluegrass and the drought resistant variety through the analytic hierarchy process , in the hope of providing a reasonable irrigation system in arid and semi-arid regions. The results showed a

9、s following: （1）80%FC is the top limit of physiological effective water threshold value of Kentucky bluegrass. （2）The lower limit of effective physiological water threshold value of Kentucky bluegrass is between 1

10、6.5%FC and 20.6%FC. （3） 4 varieties of drought resistance ranked as follows:Kelland＞Merit＞Eva＞Kitty, Kelland has the strongest drought-resistance in the 4 varieties. Key Words： Kentucky bluegrass；The physiological effec

11、tive water threshold value； Wilting；Moisture treatment；Drought-resistance Directed by： Prof. WANG Jianguang Applicant for Master degree： CHAI Huina （Grass Industry) (College of Ecology and Environment. Inner Mongolia Ag