中国草地的生态环境与毒草灾害史志诚（陕西省农业厅，西安，７１０００３）中国草地畜牧业为国民经济的民展做出重要贡献，但草地生态环境日趋恶化的形势应引起社会各界高度重视．草地的沙化，碱化和退化为有毒植物的滋生蔓延提供了有利条件．据调查，中国６０亿亩草地上... Grassland Ecology and Tobacco Disasters in China Shi Zhicheng (Department of Agriculture, Shaanxi Provincial Department of Agriculture, Xi’an, 710003) Livestock husbandry in China’s grassland makes an important contribution to the development of the national economy. However, the deteriorating ecological environment of grasslands should be given high priority by all walks of life. Desertification, alkalization and degradation of grasslands provide favorable conditions for the breeding and spread of poisonous plants. According to the survey, China’s 60 million hectares of grass ...