“赤日炎炎似火烧,野田禾苗半枯焦”。干旱,自古以来就是农业生产的大敌。兴修水利是抗旱的一种重要措施,但至今还有相当广泛的地区仍摆脱不了旱魔的威胁。人们同干旱长期斗争中,发明了一种战胜旱魔的新式武器——保水剂。 “Red sun burning like fire, Ye Tian half seedlings seedlings anxiety.” Drought has been the enemy of agricultural production since ancient times. Water conservancy construction is an important measure against drought, but so far there is still a wide range of areas are still unable to escape the threat of drought. In the long struggle against drought, people invented a kind of new type of weapon to defeat the drought-water retention agent.