Phytoplankton, like land plants, require nutrients such as nitrate, phosphate, silicate, and calcium at various levels depending on the species.
浮游植物与陆地植物一样，根据不同种类需要各级的硝酸盐、磷酸盐、硅酸盐以及钙等营养物质。
Is mainly composed of calcium magnesium sulfate, chloride and nitrate as the hardness of the form salts.
主要是由钙镁的硫酸盐、氯化物和硝酸盐等盐类所形成的硬度。
Nano - hydroxyapatite was synthesized by hydrothermal method in the submerged circulating impinging stream reactor, using calcium nitrate and sodium phosphate as reactants and acetamide as dispersant.
在浸没循环撞击流反应器中，以硝酸钙和磷酸钠为原料、乙酰胺为分散剂，采用水热法合成了纳米羟基磷灰石。
The results showed that the growth, nitrate absorption and NR activity are much lower in the deficiency calcium callus than the normal callus.
结果表明，缺钙后，愈伤组织生长、硝酸盐吸收、NR活性等都比正常钙培养下的愈伤组织降低。
According to soil fertility and soil structure in the loess plateau, the experiment of fertilizer amount was carried out with ammonium nitrate and calcium superphosphate.
根据黄土丘陵区土壤肥力特点及土体结构，选用硝酸铵和过磷酸钙作为试验肥料，进行了不同施肥量试验。
Mainly engaged in exporting of the products. Such as potassium nitrate, calcium nitrate, calcium ammonium nitrate and 26 kinds of chemical products, flanges, glassware and so on.
主要经营出口的产品有硝酸钾、硝酸钙、硝酸铵钙等26种化工产品以及法兰、玻璃器皿等。
The factors that influence the granulating course of calcium ammonium nitrate are discussed, based on the experiment data. Meanwhile the optimum parameters are also presented.
运用硝酸铵钙产品开发试验数据，分析影响硝酸铵钙造粒过程的因素，并提出了最佳的操作参数。
Secondly, the ordinary mulberry silk, slightly dissolved silk and calcium nitrate treated silk are modified by the chitosan solution and the treatment procedure of soaking-rolling-baking.
然后利用壳聚糖溶液，通过浸—轧—焙的流程整理工艺分别对普通桑蚕丝纤维、微溶丝纤维及盐缩丝纤维进行了改性处理。
The present invention is related to an improved technological process for producing sodium nitrate by the double decomposition of calcium nitrate and sodium sulfate.
本发明涉及到对用硝酸钙和硫酸钠复分解而得硝酸钠的工艺的改进方法。
Calcium ammonium nitrate is a new high-analysis compound fertilizer with excellent properties.
硝酸铵钙是一种性能优良的复合肥料。
Production and Market Situation for High Efficient Compound Fertilizer-Ammonium Nitrate & Calcium Nitrate;
磷酸一铵、磷酸二铵、复合肥、复混肥、过磷酸钙、冲施肥制造、销售。
Production and Market Situation for High Efficient Compound Fertilizer-Ammonium Nitrate & Calcium Nitrate;
磷酸一铵、磷酸二铵、复合肥、复混肥、过磷酸钙、冲施肥制造、销售。
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