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【单选题】
植物的叶面积与产量关系密切,叶面积系数(单位土地面积上的叶面积总和)与植物群体光合速率、呼吸速率及干物质积累速率之间的关系如下图所示。据下图分析,下列说法错误的是
A.
随叶面积系数持续增加，群体的呼吸速率不断升高
B.
群体干物质积累速率变化取决于群体呼吸速率变化
C.
叶面积系数小于 a时，随叶面积系数增加，群体干物质积累速率增加
D.
叶面积系数大于 b时，随叶面积系数增加，群体的光合速率不再增加
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