Rhizosphere factors have great influences on the growth and development of the stolon and tuber of potato.

根际环境因子对马铃薯块茎生长发育具有重要影响。

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Photosynthesis and dry-matter partioning are main procedures in crop growth and development models. In this paper, a model is presented based on experiment of sweet potato variety Xushu 18.

光合作用和于物质的生产与分配模型是作物生长模拟模型中最基础的部分，在试验的基础上以徐薯18为例建立模型。

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