%0 Journal Article
%T Studies on the Potential Productivity of Rain-fed Maize in Dry-land Area of Northern China<br>北方旱农区玉米自然降水生产潜力研究
%A JU Hui
%A LI San-ai
%A YAN Chang-rong
%A LI Kang
%A <br>居煇
%A 李三爱
%A 严昌荣
%A 李康
%J 自然资源学报
%D 2006
%I 
%X Drought and water shortage are the major influencing factors to sustainable agricultural development in northern China,as most of it is located in arid and semi-arid areas.Meanwhile,northern China is also an important grain producing base of the country.Exploiting the major crops potential productivity in macro-scale could provide consultative information and priority regions for the formulation of development strategy.Considering the water shortage situation and its key role in grain production in northern China,CERES-maize is used to simulate rainfall potential productivity of maize in dryland farming areas of northern China,and analyse the temporal and spatial distribution of potential productivity.The results show that average potential productivity of maize in semi-humid area is about 11 000kg/ha,while in arid area is about 5 000kg/ha.As a whole,the rainfall potential productivity of maize is in the order of sub-humid area >semiarid area >arid area.Moreover,the inter-annual fluctuation of potential productivity in sub-humid area is also significant,and that of arid area is relatively stable.The potential productivity in eastern part of northern dryland area is higher than that in the western,but there is no significant difference from north to south in the northern dryland area.
%K northern China
%K dryland farming
%K maize
%K potential productivity<br>北方
%K 旱农区
%K 玉米
%K 生产潜力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=4DCB9A3AF3395AF0101DE5302EF3C300&aid=F0F70CE89B3B2BB8&yid=37904DC365DD7266&vid=659D3B06EBF534A7&iid=E158A972A605785F&sid=7E2D9DFE40003B3F&eid=826ED638BDB6F0D0&journal_id=1000-3037&journal_name=自然资源学报&referenced_num=5&reference_num=15