三江平原是我国重要的商品粮基地,建国以来已陆续开垦了4,600万亩荒地,累积生产粮食1,200亿斤。但自1975年以来,连续出现五年干旱,引起科技界众多的关注。有必要对干旱的成因,对开垦荒地后生态环境的变化,以及今后如何进一步整治等问题,作一些探讨。 Sanjiang Plain is an important commodity grain base in our country. Since the founding of the People’s Republic, 46 million hectares of wasteland have been reclaimed, with a cumulative production of 1,200 billion jin of grain. However, since 1975, five consecutive years of drought have aroused a great deal of attention from the scientific and technological community. It is necessary to make some discussions on the causes of drought, changes in the ecological environment after land reclamation and wasteland reclamation, and how to further improve it in the future.