Abstract:

Plant droughtresistant and watersaving biology is an important subject basis for developing dryland farming and agriculture at waterscarce regions. The major issues facing us include: in terms of research route, how to correctly deal with the relation between studies on molecular level and on plant as a whole, so as to promote the mutual supplement of the two; in terms of research orientation, how to combine effectively drought resistance with water use efficiency and yield properties, so as to realize high yield and high efficiency; in terms of application of research findings, how to strengthen interdisciplinary of subjects, so as to achieve actual effect as soon as possible. The paper introduces several scientific and technological difficult points in the practice related to drought-resistant and water-saving biology in semiarid and sub-humid regions. And suggestions are proposed.

Key words: dryland farming, drought-resistant and water-saving biology, water use efficiency, compensatory effect, interdisciplinary subjects

摘要：

植物抗旱节水生物学是发展旱地农业和缺水区农业的重要学科基础，当前面临的主要问题包括：在研究路线上，如何正确处理分子水平研究与整体性研究之间的关系，以促进两者的互补；在研究目标上，如何做到抗旱性、水分利用效率、产量性状的有效结合，以实现高产高效；在研究成果应用中，如何切实加强学科交叉，以尽快取得实际效果。在论述上述问题的同时，对当前半干旱和半湿润地区与抗旱节水生物学有关的几个实践中的科技难点作了介绍，并提出建议。

关键词: 旱地农业；抗旱节水生物学；水分利用效率；补偿效应；学科交叉