2) Leaf area duration(LAD)
叶面积持久期(LAD)
3) seedling leaves
苗期叶片
1.
In order to study the molecular basis of wheat heterosis, mRNA differential display was used to analyze the difference of gene expression between heterotic hybrids 3338×Di7 (hybrid I), 3338×6554 (hybid Ⅱ), nonheterotic hybrid 2410TD×6554 (hybrid Ⅲ) and their parental inbreds 3338,6554,2410TD (common wheat cultivars) and 0i7 (spelt wheat) in seedling leaves.
选用小麦种间强优势杂交种 ３３３８×Ｄｉ７（杂种Ⅰ）、品种间强优势杂交种 ３３３８×６５５４（杂种 Ⅱ）和无优势杂交种２４１０ＴＤ×６５５４（杂种Ⅲ）及其亲本斯卑尔脱小麦Ｄｉ７、普通小麦品种（系）３３３８、２４１０ＴＤ和６５５４，采用ｍＲＮＡ差异显示技术分析了杂种和亲本苗期叶片的基因表达差异，以加深对小麦杂种优势形成的分子机理的认识。
4) accumulated temperature at seedling stage
苗期积温
1.
05) when the accumulated temperature at seedling stage(30 days after over-seeded) was over 500 ℃,and the intension of vertical cut of bermudagrass should be kept higher(≥50%) to get the ideal turf.
然而,当苗期积温>500℃时,不同疏草强度下黑麦草密度和成坪后均匀度之间呈现出显著的差异(P<0。
5) area of nursery bed
苗圃面积
6) 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。
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