Development Cropping Estimate And Analysis System Of Potential Production At Different Levels

With an eye to different scale spatial regions , the thesis is based on climate conditions database soil fertility database society productivity database and different crops, different cropping system , which are input values . Then establish the Estimate and analysis models of different levels potential yield. Using the tool of Visual Basic 6.0, design and impolder the estimate and analysis system of different levels potential yield (EAS) with the idea of descending different levels potential yield and increasing production approach. And besides, bring forward increasing production approach for different regions after comparing and analyzing the output results. Four main functions come true in the system of EAS: estimate feasibility of monoculture and its cropping mode estimate different levels potential yield of monoculture and its cropping mode comparing and analyzing different levels potential yield of main cropping modes. In the end, find the restricting factors of potential yield, and put forward solving measure and increasing production approach. Thereby, offer the scientific foundations for support power of different regions setting down the develop layout of agriculture and direction of investment. The followings are characteristics of EAS:(1) ESA amplifies on the idea ,which is the difference about growth conditions of crop.Establish the mathematical models of different levels potential yield, referring to cropping cultivation and fanning system ecology of agriculture, statistics of agriculture sustainable agriculture economics and so on. Four main functions come true in the system of EAS. The modules of four main functions not only make up of one holistic system, but also can be was separated different individual module which can conveniently put together and combine with other correlative module.(2) ESA adds the module for feasibility of monoculture and its cropping mode. It isdifferent from foregone zoology feasibility appraise system. In this module, studying feasibility of monoculture and its cropping mode is aim, and the input value is temperature which is the most rambunctious factor, then output "cropping" or "not cropping". So made ESA more reasonable and normative, and abandon the trivial indexes in foregone zoology feasibility appraise system. Importantly solve the problem which is that input value is devoid of restriction.(3) ESA puts forward analyzing different levels potential yield of main cropping modes for different regions, not only considering different levels potential yield of monoculture. At the same time, widen the field of study object. During studying different levels potential yield of main cropping modes, bring forward the conception of "equivalence potential yield", and this conception made potential yield of different crops comparable and transpositional. So we can analyze the main factors influencing mostly different levels potential yield of monoculture and main cropping modes for different regions.(4) Applying EAS to the region of Nan Jing, we draw the conclusions: EAS is exact and credible. By EAS, we can analyze different levels potential yield for Nan Jing, and set down the scientific and enforceable approaches for increasing yield.(5) EAS is universal and ease to use. Fist, EAS can be used in different regions; Secondly,every village and every cropper can be ease to apply. Referring to different regions, EAS can be directly estimate and analyze different levels potential yield of monoculture and main cropping modes.