一、会议背景和基本情况亚洲很多国家的低地生产水稻以供人们食物所需。近年来,随着人口的不断增长要求更进一步增加水稻的产量,不少稻作地区将每年一熟改为二熟或三熟。由于一般肥力水平较低,加以水分管理不善,物理限制因素就成为进一步限制增产的障碍,诸如压实 First, the meeting background and basic situation Many Asian countries in the lowlands produce rice for people’s food needs. In recent years, as the population continues to grow, it is required to further increase the output of paddy rice. In many paddy areas, the number of cooked rice is changed from one to two or three. Due to the generally low level of fertility and poor water management, physical constraints have become obstacles to further limiting production, such as compaction