关键词: 紫花苜蓿；粮食安全；食物安全；轮作系统；粗蛋白；面源污染

Abstract:

In the recent over 20 years, food diatery structure for Chinese residents has changed greatly. Grain ration consumption on residents dietary is gradually declining, and the proportion of feed grain in the total food is increasing year by year. Residents meat consumption is steadily growing, especially for beef, mutton, poutry and dairy products. Changes in residents’ dietary structure require the relative adjustment on Chinas traditional grain planting structure. As a legume grass, Alfalfa can not only guarantee the development of animal husbandry, but also play an important role in soil improvement. Under the background of plant industry structure adjustment, from the present situation of food security in China and the plight facing food security, this paper expounded the advantages and existing problems of bring alfalfa into current crop rotation system in the premise of ensuring food security, and foreseed the possible risks, and also provided some solving measures.

Key words: alfalfa, grain security, food safety, crop rotation system, protein, non\, point source pollution