spad是什么意思   spad怎么读

spad单词基本解析：

spad变化用词：

spad英英释义：

spad中文词源：

spad用法和例句：

spad

(2) The variation trend of the SPAD value in the same leaf position of two varieties was alike with the growth.

(2)2个品种相同叶位叶片的SPAD值随生育进程的变化趋势一致，均随叶片生长增加，中期稳定一段时间后又随叶片的衰老而下降。

SPAD -502

SPAD-502

SPAD meter

SPAD仪

SPAD readings

SPAD值

A Study on Relation between SPAD Value, Chlorophyll and Nitrogen Content in Cotton

SPAD值与棉花叶绿素和含氮量关系的研究

SPAD chlorophyll meter

SPAD叶绿素仪

SPAD threshold

SPAD阈值

Shanghai Photographic Adventures (SPAD) is pleased to announce our August workshop, ‘Studio Photography 101’ plus dinner.

上海影像探险之8月“影棚探险行动-代号101”及聚餐召集公告。

SPAD Value of Leaf at Different Positions on Main Stem in Potato as Influenced by Temperature and Photoperiod

不同温光条件下马铃薯不同叶位叶SPAD值变化规律研究

But leaf color (SPAD) descended quickly.The roots grew stagnantly, root length and number of roots stopped increasing, the activity of root and root/shoot ratio descended quickly, and obviously.

但秧苗叶色(SPAD值)迅速下降, 地下部生长停滞, 根长、根数停止增加, 根系活力迅速下降, 根冠比明显降低。

nbsp; VOLB X N I O O I苘 c : J U N E SPAD ?

作者：佚名技巧来源：论坛点击数：更新时间：2006-12-8

The inferring ability of SPAD value just slightly surpasses the logarithm-sum model in the shooting stage.

发现：在抽穗期和灌浆期，对数相加模型的反演能力明显优于SPAD值的反演能力。

In addition, leaf SPAD values were parabolically related with protein and starch accumulation in grains.

叶片SPAD值与籽粒蛋白质和淀粉积累量均呈二次抛物线关系。

Values of SPAD;

叶绿素含量;

These results indicate that leaf SPAD values and canopy spectral reflectance are good indicators of quality formation dynamics in wheat grains.

因此，叶片SPAD值和比值指数可以用来预测单位土地面积上小麦籽粒生长过程中蛋白质和淀粉的积累动态。

1Effect of water control on SPAD value in flag leaves of winter wheat with specialized end-uses.

图1土壤水分对专用型小麦旗叶SPAD值的影响 Fig.

At early growth stage, SPAD value and active Fe content in young leaves of iron-resistant cultivars were significantly higher than those of iron-susceptible ones.

在生长前期，耐低铁品种新叶的叶绿素值和活性铁含量均显著高于铁敏感品种；

grade spad

坡度标

SPAD Small Pack Assemble Device

小型组件装配器件

Leaf color changes in the model were described with SPAD in three phases.The first phase during leaf growth period was based on the exponential relationship of leaf color to cumulative GDD;

并基于二次曲线方程分别描述了叶片含氮量和含水量对叶色变化过程的调控效应。

In addition, the effect of nitrogen status on leaf SPAD was quantified by the value of leaf nitrogen concentration, and the relationship between SPAD and RGB was described with linear equation.

并基于叶片氮含量表达了氮素供应水平对叶片SPAD值变化规律的影响，同时用线性方程描述了叶片SPAD值与RGB值之间的定量关系。

In this paper, factors influenced SPAD readings, such as rice variety, development stage, the leaf position, the point on the leaf and environment were studied.

并综述了通过量化SPAD读数与氮的关系,提高诊断水稻氮素营养精度;

The activities of GOGAT correlated closely with SPAD values, chlorophyll a,b and a+b content.

并进一步明确了水稻根系吸收氮素与叶色变化的关系。

Primary Study on Application of SPAD Value to Estimate Chlorophyll and Nitrogen Content in Wheat Leaves

应用SPAD值预测小麦叶片叶绿素和氮含量的初步研究

Flowering stage was the most sensitive period to iron deficiency when the most severe chlorosis was observed, and the lowest SPAD value and active Fe content in young leaves were tested.

开花期是花生对缺铁胁迫最为敏感的时期，此阶段黄化现象最严重、各品种新叶的叶绿素值和活性铁含量最低。

Abstract: The size, angle spad and the brightness of the center of the synchrotron radiation light sources are very important to the users.

摘要 ：同步辐射光源的尺寸、散角和中心亮度是装置的重要参数。

The research was conducted to determine the relationships between post-heading leaf SPAD values, canopy spectral reflectance, and protein and starch accumulation dynamics in grains of wheat.

摘要研究了不同土壤水氮条件下小麦抽穗后叶片氮素状况和籽粒蛋白质及淀粉积累动态与叶片SPAD值、冠层光谱反射特征的关系。

Abstract: The SPAD - 502 chlorophyll meter appears promising for rapid, on-farm analysis of crop nitrogen status.

文章摘要: 叶绿素仪（SPAD-502）的出现使通过无损伤的田间速测对作物进行氮营养诊断成为可能。

SPAD value in young leaves can be a feasible screening indicator to select iron-resistant peanut cultivars.

新叶叶绿素值可作为花生耐低铁品种筛选的一可靠指标。

Effect of Nitrogen on SPAD and Photosynthesis Rate of Different Leaves of Winter Wheat at Grain Filling Stage

施氮对灌浆期冬小麦不同叶片SPAD值及光合速率的影响

Relationship between the Efficient Amount of Nitrogen Application for Grain Filling and the SPAD Value at Full Panicle Stage in Mid-Season Hybrid Rice

杂交中稻粒肥高效施用量与齐穗期SPAD值关系研究

SPAD Value of Cotton Leaves on Main Stem and Nitrogen Diagnosis for Cotton Growth

棉花主茎叶SPAD值与氮素营养诊断研究

Keywords Rice;SPAD threshold;Real-time nitrogen management and Site-specific nitrogen management;Grain yield;Nitrogen-fertilizer Use efficiency;Rice quality;Canopy microclimate characteristics;

水稻;SPAD阈值;实时实地氮肥管理;产量;氮肥利用率;稻米品质;冠层小气候特征;

A plot experiment showed that there were significantly positive correlations (P?0.01)between chlorophyll meter values (SPAD values) and N content in leaves,leaf color chart(LCC)values at panicle initiation and heading stages.

田间小区试验结果表明,寒地水稻叶片的叶绿素值(SPAD值)在穗分化期、抽穗期与叶片含氮量及叶色卡值(LCC值)之间都呈极显著的正相关(P?0.01)。

Highly significant correlations were found between SPAD value and chlorosis score, active Fe content and pod yield at early growth stage.

相关分析表明，在生长前期叶绿素值与黄化度、活性铁及荚果产量之间均呈极显著的相关关系。

Some properties and the calculation of the size, angle spad and the brightness of the center of the synchrotron light source are discussed in detail.

着重讨论了同步光源的尺寸、散角和中心亮度的计算方法, 并给出了合肥同步辐射光源的结果。

The results showed that leaf nitrogen accumulation was exponentially related to leaf SPAD values and linearly related to canopy spectral reflectance.

结果表明，小麦抽穗后叶片氮积累量也叶片SPAD值、冠层反射光谱分别呈显著的指数和线性相关；

The results showed that SPAD, photosynthesis rate, leaf area, plant height, the fresh and dry weights of stem and leaf were lower under sub-low temperature than those of optimal temperature.

结果表明，黄瓜叶片SPAD值、光合强度、叶面积、株高、茎和叶的鲜、干质量均是亚低温处理低于适温处理；

The results are as follow: (1) SPAD value increased with the rising of leaf position in the same maize variety, and reached the maximum in the leaf at middle of plant, then declined.

结果表明：(1)同一品种玉米叶片的SPAD值随叶位的升高而增加，至植株中间部位叶达到最大值，之后降低。

The results showed that the SPAD values of different parents flag leaf existed considerable difference, the parent existed considerable difference at different growth stages too.

结果表明：不同亲本剑叶SPAD值存在着较大的差异，同一亲本在不同的发育时期SPAD值也存在着较大的差异。

Keywords turfgrass;shade tolerance;SPAD;photosynthesis;ultrastructure;

草坪草;耐荫性;SPAD;光合作用;超微结构;

The Relationships between SPAD Readings and the Contents of Chlorophyll and Nitrogen in Strawberry Leaves

草莓叶片叶绿素含量、含氮量与SPAD值间的关系

wheel spad

轮罩

The feasibility of readings of SPAD - 502 on the nitrogen nutritional diagnosis of corn was studied through a simple field experiment and research method under field condition.

采用简单的试验和研究方法在田间条件下研究了叶绿素仪应用于夏玉米氮营养诊断的可行性。