Change trends of food provisions in China

This paper analyzes change trend of farmland food production, grassland food provision, marine and inland aquatic products, and imports and exports in terms of calorie, protein and fat under consideration of Grain-for-Green program and urbanization. The analysis shows that annual mean production of farmland in the first period from the year of 1985 to 1995 was calorie of 1,179,629,173 million kcal, protein of 35,720 million kg and fat of 11,752 million kg on an average. In the second period from 1995 to 2005, farmland provision was 1,389,489,929 million kcal, 42,880 million kg of protein and 16,694 million kg of fat. Calorie production increased by 209,860,756 million kcal, protein by 7160 million kg, and fat by 4943 million kg annually. Annual grassland provision was 318,964.1 million kg of dry biomass during the period from 1982 to 1992 and decreased by 3159.3 million kg during the period from 1992 to 2002 on an average. Total aquatic production, including marine and inland aquatic products, has a considerable increasing trend since 1998 and reached to 49,017.17 million kg in 2004. Net imports, imports subtracting from exports, became bigger than zero greatly since 1995 and net imports of calorie increased to 121,460,766 million kcal, protein 7546 million kg and fat 5880 million kg in 2004. China supplied calorie for 1917 million persons, protein for 2193 million persons and fat for 1111 million persons under primary well-to-do life in 2004. China had a great problem of fat shortage. If foods on the first trophic level such as grain, beans and oil-crops were appropriately converted into foods on the second trophic level such as meats, China would find a solution for fat shortage problem and could supply food for 1534 million persons, 1500 million persons and 1411 million persons under primary well-to-do life, full well-to-do life and well-off life respectively in 2004 in terms of a model for balancing nutrients.