The results show that: the grain production safety degree of the two provinces of Jilin and Liaoning in 2000 was lower than that in 2003,but the result is opposite in Heilongjiang Province where grain production safety degree of 2000 is higher than that in 2003.

Influence of short-term management on ecological environment and regional food security in the Heihe River Basin;

Use of water and land for food security and environmental sustainability;

Actuality and Technological Strategy of Food Security in China;

Analysis of retaining cultivated land and food safety in Guangxi;

Problems of agricultural disasters and food safety during the progress of urbanization in China;

To enhance the productive capacity of cultivated land and secure grain safety;

Dynamic research on regional grain safety;

Influences of Defarming-and-reafforestation Scale on Grain Security in Shizhong District of Guangyuan City;

Calculation of regional grain security and dynamic equilibrium of cultivated land quantity——A case study of Shaanxi Province;

Application of the virtual water trade to China s grain security;

In the paper,the aim orientation at foodstuff safety in Jiangsu was firstly expatiated,then the view on foodstuff safety based on well-off level was presented,at the same time,the status of foodstuff production,requirement on foodstuff in a medium-long term and challenges about it in Jiangsu were also analyzed,finally many countermeasures were presented according to the above questions.

Based on foodstuff safety,the writer analyzes the rationality of China s present-day farmland i.