1) ratio of leaf area to sapwood area
叶面积/边材面积
1.
Combining with the tree morphological features and sap flux density,the whole-tree transpiration,canopy stomatal conductance,and ratio of leaf area to sapwood area were calculated by simplified Whitehead and Jarvis equation,and the effects of tree height on these three parameters were analyzed.
结合树木的形态特征、液流密度和简化的Whitehead&Jarvis公式,分别计算了整树蒸腾、冠层气孔导度和叶面积/边材面积比值,分析了树高对整树蒸腾、冠层气孔导度和叶面积/边材面积比值的影响。
2) Leaf/sapwood area
叶/边材面积比
3) Sapwood area
边材面积
1.
In this article, sapwood area is used as a scalar to extrapolate the stand water use from whole tree water use measured by heat pulse velocity recorder(HPVR).
该文在单木液流测定的基础上 ,采用边材面积作为纯量 ,对京北山区水源保护林的主要树种油松、刺槐林进行由单木到林分耗水的推算 。
4) specific leaf area
比叶面积
1.
Relation between specific leaf areas and leaf nutritent contents of plants growing on slopelands with different farming-abandoned periods in the Loess Plateau;
黄土高原不同退耕年限坡地植物比叶面积与养分含量的关系
2.
Photosynthesis in relation to leaf nitrogen,phosphorus and specific leaf area of seedlings and saplings in tropical montane rain forest of Hainan Island,South China;
海南岛热带山地雨林幼苗幼树光合与叶氮、叶磷及比叶面积的关系
3.
Concentrations of PAHs in leaves of six dominant species in the Pearl River Delta of South China were determined with gas chromatography and mass spectrometry(GC-MS),and synchronously leaf-lipid contents,leaf areas,specific leaf areas(SLA) were measured.
应用气相色谱-质谱联用方法测定了珠江三角洲地区6种主要树种叶片多环芳烃(PAHs)的含量,并对相应的叶脂含量、叶面积、比叶面积进行了测定,探讨了叶片PAHs含量特征和种间差异的影响因素。
5) leaf area
叶面积
1.
The leaf area index measurement of Drepanostachyum ludianense;
小蓬竹的叶面积指数测定
2.
Effects of fertilizing and sowing amounts on the increase of leaf area and the accumulation of dry matter of Elymus sibirlius L.cv.Duoye;
施肥量和播种量对当年播种的多叶老芒麦叶面积增长和干物质积累的影响
3.
Modeling of the leaf age and leaf area per plant in winter barley;
冬大麦叶龄与单株叶面积模拟的研究
6) leaf area
叶片面积
1.
Measurement of plant leaf area;
植物叶片面积的测定方法
2.
Research on measurement of realistic planting leaf area based on machine vision;
基于机器视觉的现实叶片面积测量方法的研究
3.
A new method for leaf area measurement based on the algorithm of image characteristic value was studied in this research.
应用扫描图像RGB三原色灰度值分离理论,根据植物叶片扫描图像像素点的分布特征,选用蓝色灰度值作为特征值,以扫描图像灰度中间值127作为叶面积图像与背景图像灰度值的判读指标,通过叶片像素点的分布比例计算叶片面积。
补充资料：比表面积
分子式：
CAS号：
性质：单位体积或单位质量固体的表面积，通常用1g固体的总表面积表示。由于制备条件的不同，固体与气相接触的表面大小可有很大差异。多孔性和细碎性固体的表面积包括内表面和外表面，内表面由其内部孔隙和裂缝缝隙面积构成，外表面是固体外部的几何面积，二者之和为总表面积。比表面通常用物理吸附法测定，如BET容量法、重量法、流动色谱法等。有时也可用液相吸附法测定。对比表面大于1m2/g的样品常用低温氮吸附容量法或流动法，而小表面则用低温氪吸附法。对于非孔性固体，也可根据测出的粒子大小计算比表面。
CAS号：
性质：单位体积或单位质量固体的表面积，通常用1g固体的总表面积表示。由于制备条件的不同，固体与气相接触的表面大小可有很大差异。多孔性和细碎性固体的表面积包括内表面和外表面，内表面由其内部孔隙和裂缝缝隙面积构成，外表面是固体外部的几何面积，二者之和为总表面积。比表面通常用物理吸附法测定，如BET容量法、重量法、流动色谱法等。有时也可用液相吸附法测定。对比表面大于1m2/g的样品常用低温氮吸附容量法或流动法，而小表面则用低温氪吸附法。对于非孔性固体，也可根据测出的粒子大小计算比表面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条