Optimization Study On Time And Space Suitability Of Vegetables In The Background Of Organic Cultivation

With the development of the society, it is very significant that realizing vegetable multi production in the case of trend of the vegetables delivery in the particular time and area. So it is very necessary that analyzing the suitability of vegetable production to offer the realistic basis and theoretical guidance for vegetable multi production. Under organic cultivation background, the author established suitability degree models of climate and soil mineral nutrients, from natural resource utilizing angle analyzed the situation of climate and soil; The author got the light utilization situation and input-output data of different vegetables rotation model, from economic income angle analyzed the situation of vegetable production; The author study the change and maintenance of fertilizer in the Process of vegetable production, from fertilizer application angle analyzed the situation of vegetable production.Based on the biological characteristics of vegetable and the 1975-2009 meteorological data in Pudong District, combined the theory of suitability-degree of agro-ecological climate resources, by using fuzzy mathematics, the author established climate suitability degree models of 3 climatic factors and comprehensive evaluation models, evaluate the suitability of vegetable growth , made sure the suitability of different vegetables by month, and got the different Culture Control Measures.Based on the content of Nitrogen, Phosphorus and Potassium in the soil of Pudong District, combined the needs of various factors in the soil, by using fuzzy mathematics, the author established soil suitability degree models of 3 soil factors and comprehensive evaluation models, Determine the weights of each factor by AHP, evaluated the suitability of vegetable growth according the suitability, and provided theoretical foundation for the choice of vegetable base and fertilizer.Based on the experiment and Follow-up investigation of organic farm in Pudong District, the author got the data of Input- Output of vegetable planting. The analyzed showed that: The labor cost in organic vegetable production was higher than it in common vegetable production; Solanaceous fruits were better than other vegetable, Second model was better than other models from the point of the planting performance, Second model was also better than other models from the point of solar energy utilize。By researching the change and Maintenance of Nitrogen, Phosphorus and Potassium in the soil, the result showed that: the vegetables had high utilization ratio of potassium in the first and second models, the vegetables had high utilization ratio of nitrogen in the third and fourth models, the vegetables had high utilization ratio of phosphorus in the third model. Celery, Chinese cabbage had higher bias productive forces than other vegetables, and the Garlic had lowest bias productive forces. The vegetables absorbed Nitrogen and Potassium more than Phosphorus.