一、源和库的概念农作物的生物产量90—95%来自光合产物,5—10%来自土壤中的矿物养分.作物的经济产量为生物产量和经济系数的乘积,一般可用如下公式表示:经济产量=(光合面积×光合能力×光合时间-消耗)×经济系数在分析经济产量的形成时,人们常常提及“源”和“库”的概念.源和库概念的引用,对于深刻表征影响经济产量高低的某些规律,用以指导作物栽培和育种工作的实践,有着重要的意义. First, the concept of source and library Crop biological yield of 90-95% from photosynthetic products, 5-10% from mineral nutrients in the soil Crop economic output for the bio-yield and economic coefficient of the product, the general formula can be expressed as follows: The economy Yield = (photosynthetic area × photosynthetic capacity × photosynthetic time-consumption) × economic coefficient People often refer to the notion of “source” and “stock” when analyzing the formation of economic output. The references to source and sink concepts have profound implications for the characterization It is of great significance that certain laws governing the level of economic output are used to guide the practice of crop cultivation and breeding.