求翻译：玉米进行光合作用的主要器官是叶片, 因此，有理由认为玉米干物质积累绝大部分来自叶片，玉米的植株状态可以由叶面积指数来反应；干物质积累量在一定范围内与产量呈密切正相关关系，即作物经济产量的高低是由干物质积累的多少所决定的, 但又受经济系数的制约，干物质积累越多，籽粒产量也就越高，因此, 掌握玉米的干物质积累与分配对提高产量具有重要意义是什么意思？

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Corn for photosynthesis of the main organ is leaves, therefore, there is reason to believe that corn dry material accumulated from the majority leaves, corn stalks of status can be determined by leaf area index in response; Dry material accumulation rates within a certain range and output is being c

The corn carries on the photosynthesis the main organ is a leaf blade, therefore, some reasons thought the corn does the material accumulation major part to come from the leaf blade, corn's adult plant condition may respond by the leaf area index; Does the material accumulation quantity to assume th

Corn for photosynthesis of main organ is leaves, so, has reason think corn dry material accumulated most from leaves, corn of plant State can by leaves area index to reaction; dry material accumulated volume in must range within and production is close are related relationship, that crop economic pr

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