蔬菜生产的氮素调控技术与应用  

Application of N Management Strategies in Vegetable Production

作　　者：陈清[1] 张福锁[1] 李晓林[1] 

机构地区：[1]中国农业大学资源与环境学院,北京100094

出　　处：《中国蔬菜》2005年第B10期57-63,共7页China Vegetables

基　　金：国家"十五"攻关课题(2002BA516A07);农业部"948"项目(2003-Z53)

摘　　要：综述了蔬菜生长及根系发育的特点,提出合理的水氮平衡管理原则。根据确定蔬菜作物根系环境的最低养分需求、作物生长过程中养分的损失和吸收等过程来实现氮素的合理调控;根据滴灌施肥的特殊性,通过分析蔬菜作物生长期间的养分需求,结合作物反应、土壤和植株的快速分析技术及相关的养分测试临界水平(CNR)指标,对氮素营养调控进行反馈调节,直至得到产量、经济收入和持续发展等方面比较满意的综合推荐目标。One of basic prerequisites to assure non-polluted vegetable production with high yield and good quality is to develop optimum strategies of N management in vegetable production of China. Then principle of nitrogen management in sustainable vegetable production was reviewed, considering the characteristics of vegetable crops growth and root development. The ＇ target value＇ of N supply including the components of critical nitrogen concentration in root zone, N demand and N loss was introduced in nitrogen recommendation and based on the estimation of N release from different sources, the practice of N fertilization could be realized in real-time balanced calculation. Meanwhile feedback control system in N management also should be involved to evaluate and estimate the effects of water and nutrient management practices until the satisfying effect was achieved, together with the fast-test techniques of nitrogen diagnosis in soil-plant system.

关 键 词：蔬菜生产 水肥管理 诊断 反馈调节 

分 类 号：S63[农业科学—蔬菜学]