1)  nutrient use efficiency
养分有效利用率
2)  nutrient
养分
1.
Quantitative estimation of nutrient content in DAP products;
磷酸二铵产品养分含量的定量估算
2.
Effect of slog containing silicon on nutrient absorption and yield of rice;
含硅熔渣对水稻养分吸收及产量的影响
3.
Characteristic of nutrients and polluting chemistry in dredged sludge;
疏浚底泥的养分特征及污染化学性质研究
3)  nutrition
养分
1.
The Nutrition Status of Tobacco Soils with Different Types and Balance Fertilization in Xinyang;
信阳市不同类型植烟土壤养分现状及平衡施肥
2.
Study on the nutrition characteristics of rhizosphere soil and wood soil in Fokienia hodginsii with Schima superba mixed forest;
福建柏木荷混交林林地与根际土壤养分特性的研究
3.
Study on the effects of fertilization on dynamic variety of soil nutrition of grassland;
施肥对草原土壤养分变化的研究
4)  Nutrients
养分
1.
Effect of nitrogen application rates on the concentration and distribution of nutrients in maize;
氮肥用量对玉米体内养分浓度和养分分配的影响
2.
Characteristics of nutrients of main tobacco cultivated soils and recommend fertilization techniques in Simao city;
思茅市主要植烟土壤养分特征及推荐施肥技术
3.
Effect of Site Condition on Biological Characteristics of the Nutrients in Larix olgensis;
立地条件对长白落叶松养分生物学特性的影响
5)  soil nutrients
养分
1.
The content of soil nutrients and pH of the 52 soil samples in the plough layer(0~20 cm) of groundwater-irrigated farmland soils and sewage-irrigated farmland soils which had been irrigated swine wastewater of Jing an swine-farm 8 years was measured,whose aim was to study that soil nutrients and pH in soils were affected by long-term swine wastewater applied.
为了了解长期灌溉猪场废水对农田土壤pH值和土壤养分的影响,采集了河北省京安猪场区域农田清灌区和灌溉8年猪场废水污灌区的耕层(0~20 cm)共52个土壤样品,测定了样品的pH值和土壤养分,应用GIS结合地统计学方法对pH值和养分进行空间结构和分布特征分析。
2.
According to the data of long-term soil profile measure and soil monitoring in the last years,the dynamic tendency of soil nutrients in the fixed location was discussed.
根据具有较长时间跨度的土壤剖面监测和最新年度土壤监测数据分析表明,在现有施肥和管理水平下,土壤养分及酸碱度总的变化趋势为:土壤有机质、全氮、全磷、全钾含量以上升和稳定为主;碱解氮、有效磷含量稳中有升,速效钾含量升降各半;有效铜、锌、铁、锰含量有上升趋势,有效硼有下降趋势而有效钼有升有降;中性和微酸性土壤pH值普遍降低,土壤酸化明显。
6)  nutrient content
养分
1.
Effects of different N,P and K levels on yield and nutrient content in Lettuce;
不同氮磷钾水平对生菜产量及体内养分的影响
2.
Effects of slow release-fertilizers on yield,nutrient contents and quality of Coptis chinensis;
黄连缓释专用肥对其产量、养分、品质的影响研究
3.
The soil nutrient content in the paddy field of Qianyanzhou Ecological Station is analyzed systematically and quantitatively.
以千烟洲生态站试区稻田为监测对象 ,研究红壤中 pH、有机质、全氮、速效养分的变化规律 ,为农田系统的长期定位观测与生态学研究提供基础数据与方法 ,结果表明红壤稻田存在养分退化趋
参考词条
补充资料：催化剂表面有效利用率
分子式：
CAS号：

性质：将通常测定的反应速度与消除内扩散后所测定的速度之比，定义为催化剂表面有效利用率。用以表征催化反应受颗粒内扩散控制的程度。工业上有许多反应是在内扩散区进行的，其催化剂的表面利用率差别很大。如苯酚在Ni催化剂上加氢时表面有效利用率为72%。使用5mm合成氨催化剂颗粒时，表面有效利用率为72%，而用2mm颗粒时，接近100%，即反应在动力学区进行。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。