1) Leaf area formation
叶面积形成
2) composition of leaf area
叶面积组成
3) constitution of LAI
叶面积指数组成
1.
The relationship between constitution of LAI and yield was studied in early stage with Shan you 63 and xiang jing 97-3017,the results indicated: Yield showed parabolics cueve relationships with LAI of N-n and elongating stage.
有效分蘖临界叶龄期、拔节期LAI适宜,叶面积指数组成结构合理,才能获得高产。
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：受光叶面积指数测定
受光叶面积指数测定
determination of lighted leaf area index
shouguang yem一anji zhishu eeding受光叶面积指数测定(determination oflighted leaf area index)生长状况观测项目之一，是对受到太阳直接辐射照射的叶面积(用叶面积指数来表示)的侧定(见叶面积测定)。测定目的在于鉴定光能在作物群体中分布的合理性和有效性;预测其对产量的影响。测定时首先分层测定受光面积率。一般采用棒测法，即用一根110厘米长的木尺，其上每隔1厘米点一红油漆点(共100个点)，将它水平放置在欲测的层次高度上，与作物行间垂直，并固定在支架上，随后数它被阳光直接照射的亮点(红漆点)数。在同一高度上，用同样的方法，每间隔10厘米左右移动测尺一次，共测十次，算出总亮点数，然后除以1000，便求得该层受光面积率(百分率)。中国已研制出直射透光率测定仪，其棒状感应器为1米长，由100个感应器件组成，用它在作物群体内进行快速扫描，直射光透光率由数码直接显示。作物冠层的垂直分层，对于矮秆密植作物(如稻、麦)，一般从地面向上每10厘米为一层，而稀植高秆作物(如玉米)，一般每20一30厘米为一层。测定时，按照划分好的垂直层次标志，由上向下逐层分别测得各层的受光面积率。其次，分别测出各垂直层次间的叶面积密度(见叶面积密度测定)。最后，求算群体受光叶面积指数。某层叶面积密度乘以该层的受光面积率就是该层的受光叶面积指数。(林家栋)
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