9Yiwei Jiang, Binru H uartg. Drought and Heat Stress Alone and in Comination on Kentucky Bluegrass [ J ]. Crop Sci, 2000, (40) : 1358 - 1362.
10Hanson A D, Nelsen C E, Ererson E H. Evatuation of Free praline accumulation as an Index of drought resistenee using two controsting barley cultivars[J]. Corp Sci, 1982,22:459