Study on Drought Resistance Identification and Evaluation Methods of Alfalfa during Whole Growth Period
WU Rui-xin, Li Yuan, YOU Yong-liang, LIU Gui-bo, ZHAO Hai-ming
Dryland Farming Institute, Hebei Academy of Agricultural and Forestry Sciences, Hebei Key Laboratory of Crops Drought Resistance, Hengshui, Hebei Province 053000, China
Abstract：By the field simulation drought method with rain-proof shed,we selected 12 alfalfa materials with different drought resistance at seedling stage to study the drought environment setting,identification indices and evaluation method selection. The results showed that the stress state started from the seedling stage,the stress cycle was the entire annual growing season. The selected evaluation indices were biomass,plant height and the number of plant branch. The methods of membership function and drought resistance index were adopted to evaluate the drought resistance of alfalfa materials. Compared with those evaluation methodsat seedling stage,the result showed better consistency with the methods of membership function during the whole growth period while a certain difference with the method of drought resistance index. The drought resistance identification at seedling stage has advantages such as short evaluation period,easy to operate,suitable for large number of materials and is of scientific to some extent. But the results of drought resistance identification during the whole growth period were more intuitive,accurate and reliable,which was suitable for evaluating the actual drought resistance of alfalfa.
武瑞鑫, 李源, 游永亮, 刘贵波, 赵海明. 紫花苜蓿全生育期抗旱性鉴定评价方法探讨[J]. 草地学报, 2020, 28(5): 1444-1453.
WU Rui-xin, Li Yuan, YOU Yong-liang, LIU Gui-bo, ZHAO Hai-ming. Study on Drought Resistance Identification and Evaluation Methods of Alfalfa during Whole Growth Period. Acta Agrestia Sinica, 2020, 28(5): 1444-1453.
Hayat S,Hayat Q,Alyemeni MN,et al. Role of proline under changing environments:a review[J]. Plant signaling &behavior,2012,7(11):1456-1466
[10]
Fang Y,Xiong L. General mechanisms of drought response and their application in drought resistance improvement in plants[J]. Cellular & Molecular Life Sciences Cmls,2015,72(4):673
[11]
I.M. Zeid. Z.A. Shedeed. Response of alfalfa to putrescine treatment under drought stress[J]. Biologia Plantarum,2006,50(4):635-640
2020, Vol. 28 
