| Individual and systemic development of citrus tree is the result of interaction and adaptation each other between the interior factors of plant and the exterior conditions. Therefore, layout of producing area of citrus industrialization comes down to the problems of nature, humanity, society, economy and technology etc. We should consider not only the natural adaptation and the humanity admitting, but also the social demand and the economical and technological possibility. In a word, the complex problem is synthetically influenced by many factors. So, it requires cooperation of many subjects to arrange the bases reasonably.Based on the former research results, appling all kinds of interrelated data and the analysis results of the physical and chemical property of four purple soils, under the guidance of the Sustainable Development theory ^ Relatively Superiority' theory x Eco-Economics theo^ Scale Economics theory and the theory of Large-scale System of Rock-Soil-Plant, this paper deeply studied a series of problems about producing area layout of citrus industrialization in Chongqing.The present situation, problems and cause of producing area in Chongqing are analyzed in this paper. (1) Citrus yield is reduced by the adverse climate. (2) Total area distribution of citrus is big but sporadic. (3) There are many blocks and CaCOs, thin soil layer and high pH in the orchard soil. (4) Weak capacity of keeping water and soil in the orchards leads to serious loss of them. (5) There are late producing and low yielding for the inefficient management in orchards. (6) Too concentrated collecting time is caused by unreasonable makeup of varieties, and the ratio of high quality fruit is very low. (7) The basic conditions of citrus orchards are feeble for the guidance of error thought.According to a series of theories of sustainable development, the paper established guidance thoughts of producing area layout of citrus industrialization. (1) It is the Large-scale System of Rock-Soil-Plant that the harmonious interaction between climate, soil, rock,3biology and human being. (2) We should establish the Eco-Economics view that zoology and economy is uniform. (3) We should erect the opinion of sustainable development that developing economy is as important as the protecting environment. (4) We should build up the relatively superiority view of expanding superiority and avoiding inferiority. (5) We should persist in combining depth development with scope development, and give priority to depth.And the paper brought forward the principles of producing area layout in the citrus industrialization. We should maitain the principle of sustainable development, the principle of innovating organization and scale economy, the principle of combining centralization with decentralization and the overall principle of unifying layout. We should persist in the most suitable ecological principle, the standing out superiority principle, making overall plans and taking all factors into consideration, the principle of the best efficiency and agriculture science and technology advancement.And according to the aim and requirement of citrus industrialization of the "million tons" in Chongqing, the paper put forward the concrete criterion of layout: an altitude of below 450 meters^ gradient at 5?-17?-. average temperature no less than 18癈 every yean mass area more than 140hm2 -. a sufficient supply of wate^ far from industrial pollution^ weathered from saximiao purple parent rock.Applied the guidance thought > principle and criterion, the paper appraised the adaptation of ten counties hi coastwise of Three Gorges reservoir. Sequentially, the paper built the layout blueprint of the "million tons" project in Chongqing. 10600 hectare Valencia orange bases are arranged in the villages and towns round the lake of changshou and dahong in changshou, and 1350 hectare Valencia orange bases are rebuilt. 6333.3 hectare Jinchen and 5733.3 hectare harnlin orange are distributed in the adaptation area of jiangjin, drainage area of yulin rive...
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