It was necessary for maintaining normal chlorophyll content and net photosynthetic rate to supply macroelements.
供应大量元素是维持正常叶绿素含量和光合速率所必需的。
Pot experiments were carried out to study the optimal prescription of macroelements in nutrient solution for lettuce hydroponics.
采用回归分析法，通过盆栽试验，研究莴笋无土栽培营养液中大量元素的最优配方。
However, in the macroelements excessive NH4NO3 does not favor the growth of hairy root, the accumulation and release of tanshinones.
而大量元素中含量过多的NH4NO3不利于丹参毛状根的生长，同时也不利于丹参酮类成分的积累和释放。
Objective To study the contents, distributions and correlations of some macroelements in the organic tissues of healthy fetus and the maternal blood.
目的探讨正常胎儿器官组织和母血中多种常量元素的水平、分布以及元素间的关系。
There existed two common factors called macroelement factor and trace element factor, which indicate the contents of macroelements and trace elements in the plants respectively.
因子分析中认为存在大量元素与微量元素两个公共因子，分别代表着植物中大量元素与微量元素的含量状况。
This paper describes the occurrence characteristic of macroelements in the region and discloses the relationship between partial macroelements and sedimentary environment in the coal.
本文分析了区内常量元素的赋存特征，揭示了煤中部分常量元素与沉积环境的关系。
This paper describes the occurrence characteristic of macroelements in the region and discloses the relationship between partial macroelements and sedimentary environment in the coal.
本文分析了区内常量元素的赋存特征，揭示了煤中部分常量元素与沉积环境的关系。
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