硫素是植物必需营养元素之一。
磷是植物必需的一种大量营养元素。
大量营养元素对植物来说所必需的大量元素包括碳、氢、氧、氮、磷、钾、镁和硫。
Macronutrients. The macronutrients essential for plants include carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, magnesium, and sulfur.
钙、硼是植物生长发育的必需营养元素。
硼作为植物的必需微量营养元素，在植物的细胞结构、功能和代谢活动中具有极其重要的作用。
As a micronutrient, boron is of important role in the structure, function and metabolic activity of plant cell.
微量营养元素植物所必需的微量元素包括钼、硼、锌、锰、铁，铜和氯。
Micronutrients. The micronutrients essential to plants include molybdenum, boron, zinc, manganese, iron, copper, and chlorine.
磷不但是动植物必需的营养元素，也是重要的环境污染因子。
Phosphorus was not only the essential nutritional element for plants and animals, but also significant factor of environment pollution.
锌是植物、动物的必需营养元素，又是环境检测的金属元素之一。
Zinc is the necessary nutrition element, and is one of the necessary test elements of heavy metal in environment test.
大量实践和研究发现，堆肥除了能够为植物生长提供多种必需的营养元素，还能够抑制多种土传病害的发生。
A lot of practices and researches showed that compost can not only provide nutrition to plants, but also suppress the occurrence of various soil-borne diseases.
硼作为植物的必需微量营养元素，在植物的细胞结构、能和代谢活动中具有极其重要的作用。
The Effects of Essential Trace Elements Manganese, Iron and Zinc on the Content of Aloin and Aloe-emodin in Aloe Barbadensis Mill. ;
硼作为植物的必需微量营养元素，在植物的细胞结构、能和代谢活动中具有极其重要的作用。
The Effects of Essential Trace Elements Manganese, Iron and Zinc on the Content of Aloin and Aloe-emodin in Aloe Barbadensis Mill. ;
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