It may partly be because that understanding of morphological and physiological bases for crop growth and yield are rather limited.
这可能与人们对作物生长和产量的生理基础了解不多有关。
参考来源 - 水稻产量相关性状的形态生理分析和分子标记剖析·2,447,543篇论文数据，部分数据来源于NoteExpress
It also showed that the good grain filling character of Liaoyou 3072 was one of the physiological bases for the super high yield.
辽优3072良好的籽粒灌浆特性是其在产量上表现出超高产的生理基础之一。
Based on research results, this paper analyses some key factors of the pre-hardening, effects of this technique on plant growth and its physiological bases.
本文根据有关资料及笔者的工作，分析了有关锻炼方法的关键因素及其对植物抗旱性的影响和生理基础。
By field experiment and lab analysis, the relation of the physiological bases of the reducing sugar forming in potato tuber and potassium metabolism was pilot studied.
通过田间试验和室内分析测定，对马铃薯块茎低还原糖形成的生理基础与钾代谢的关系进行了初步研究。
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