求翻译：为了建立符合贵德县地方实情的杜长大三元杂交育肥猪理想的营养需要数学模型，引入新的营养指标体系并建立动态的营养需要系统，最终为降低饲养成本、提高猪生产性能提供技术参考。是什么意思？

In order to establish the place the facts in Guide County, Duroc crossbred fattening pigs nutritional needs of an ideal mathematical model, the introduction of new nutritional indicator system and the establishment of a dynamic nutritional needs, and ultimately reduce feeding costs and improve pig p

In order to establish a consistent with the county $3 local realities of hybrid Shifushi du grew up pig ideal nutritional needs of mathematical models, introduction of new nutritional indicators system and establish a dynamic nutritional needs, and ultimately to reduce costs and improve breeding pig

In order to establish conforms to Guide County place truth Du to grow up three Yuan hybrids to nurture the fat pig ideal nutrition to need the mathematical model, introduces the new nutrition target system and establishes the dynamic nutrition to need the system, finally for reduces the raising cost

In order to set up Guide County where the truth grew up in du Pont finishing pig nutrition of ideal mathematical model of three-way cross, introduced a new nutritional needs of nutrition and the establishment of the index system of dynamic system, eventually to reduce feeding costs, improving pig's

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