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ABSORPTIONANDDISTRIBUTIONOF~(15)NBYMAIZEUNDERSHADINGANDFOLIARFERTILIZATIONTREATMENTOuyangHuamin;CaoYiping;WangJingguo（Dept.plantNatrition，CAU，Beijing100094）作物产量的形成，取决于对源一库关系的调控。强源、扩库以及提高养分运输和分配效率，使更多的养分向
The formation of crop yield depends on the regulation of the relationship between source and sink. Strong sources, expansion of pools, and increased nutrient transport and distribution efficiency enable more nutrients to be directed