硫素是植物必需营养元素之一。
钙、硼是植物生长发育的必需营养元素。
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.
前言：目的：探讨不良妊娠胎儿的发生与部分必需营养元素含量的关系。
Objective: To study the relations between contents of partial necessary nutrition elements and occurrence of ill pregnancy.
还初步探讨了CO2浓度升高对稻米中人类必需营养元素的不足(或“隐性饥饿”)的影响。
Effect of elevated pCO2 on the possible "hidden hunger" in rice grain was also discussed.
镁是动物的必需营养元素之一，日粮中添加镁具有抗应激、抗氧化、改善肉品质、提高生产性能的重要作用。
Magnesium is regarded as an essential nutrition for all animals. It plays an important role in antioxidation, antistress, improving meat quality and performance.
收集了国内外6个产地不同等级的香料烟样品，对其内在化学成分、必需营养元素和挥发性致香物质等进行了分析。
Different grades of Oriental tobacco samples from6producing areas at home and abroad were collected and analyzed for chemical components, necessary nutrition elements and volatile flavor sub-stance.
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.
罗切特的恢复餐中包括了所有恢复身体状态所必需的重要常量营养元素。
Lochte's recovery meal has all the important macronutrients necessary for recovery.
磷是植物必需的一种大量营养元素。
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.
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.
营养元素锌是人体必需的微量元素之一，对人体的生长发育起着重要的作用。
Zn is one of the necessary microelements for human body, which is important and helpful for well developed human body.
微量元素是人体必需的极易缺乏的营养元素。
Microelements tonic is one of necessary nutrition of body that very easy to fault.
铁是人体必需的微量营养元素。
铜是作物生长发育必需的营养元素，也是污染环境的重金属元素。
Copper are both an essential nutrition element for crops and a heavy metallic element polluting the environment.
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.
检测出19种元素，其中必需的营养元素9种，重点比较了必需的微量营养元素的含量。
There were 19 metal elements in the seeds, among them 9 were essential nutrient elements.
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.
营养元素锌是人体必需的微量元素之一，对人体的生长发育起着重要的作用。
Zn is one of the necessary microelements for human beings, which is important and helpful for human body.
虽然镍是一种必需的微量营养元素，但在较高含量时，对土壤微生物会造成毒害。
Nickel is an essential nutrition element to microorganism, but it is toxic at high concentration in soil.
微量元素锌是人体所必需的营养元素之一。
Zinc is one of the necessary nutrition microelements for human body.
而且，通过卤虫的代谢作用，藻类生长所必需的营养元素得以还原。
And, nutrients essential to the growth of microalgaes can be restored through metabolism of Artemia salina.
污水中含有大量N、P、K等营养元素，其中，磷是庄稼生长必需的重要营养元素之一。
Sewage contains large amounts of N, P, K and other nutrients, such as phosphorus is necessary for crops to grow as one of the important nutrients.
硫作为作物所必需的营养元素，在作物的生长代谢过程中起着许多重要的作用。
Sulfur is an essential element in crops nutrition, which plays a vital role in crop growth and metabolism.
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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