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水是农业赖以生存和发展的基础,尽管地球上水的储量很大,但其中可利用的淡水量只有总储量的0.003％左右,且分布极不均匀,不同年分水分的变化常常是造成农业产量不稳定的重要原因。如何提高水分利用率成了各国关心的问题。人们通过品种选育,种子干旱锻炼与药剂处理,提高作物抗旱能力;通过抗蒸腾剂及生长抑制剂减少作物体内水分的散失以及缩短生育期等多种手段来增强抗旱能力。据报道,早在60年代就对生长抑制
Water is the basis for the survival and development of agriculture. Although there is a great reserve of water on the earth, the usable fresh water is only about 0.003% of the total reserves and the distribution is extremely uneven. The changes of moisture in different years are often caused An important reason for the unstable output of agriculture. How to improve water use efficiency has become a concern of all countries. People through the variety breeding, seed drought exercise and pharmaceutical treatment, improve crop drought resistance; through the anti-transpiration agents and growth inhibitors to reduce crop water loss and shorten the growth period and other means to enhance drought resistance. It was reported as early as 60 years on the growth inhibition