您要查找的是不是：
- Photosynthetically active radiation (PAR) had no significant directly influence to the Pn, but through other factors affect Pn indirectly. 光合有效辐射对青冈栎光合速率直接影响不显著，而主要是通过其它因子间接影响光合速率。
- Wavelength-selective or photoselective mulches absorb photosynthetically active radiation （PAR） and transmit solar infrared radiation. 波长选择性或光选择性塑膜吸收光合活性辐射并传递太阳红外辐射。
- The results showed that the percentage of photosynthetically active radiation (PAR) was about 80.1 in the absorption spectrum. 结果表明，冠层上方总辐射、反射辐射、基部透射辐射及吸收辐射中光合有效辐射所占百分比分别为47.;5%25、25
- The frequency of fog occurrence has been as high as 40% of annual time and has reduced ca. 70% of the accumulated photosynthetically active radiation. 此区域一年有平均约40%25以上的时间受云雾笼罩，雾发生时林冠上光量平均降低约88%25，以年平均而言，林上光量因云雾之发生衰减约70%25。
- For modelling of three dimensional distribution of Photosynthetically Active Radiation (PAR) in crop canopy, the important contents of this thesis are as following. 本文的主要研究目的是建立玉米冠层内光合有效辐射(Photosynthetically Active Radiation, PAR)三维空间分布的模拟模型。
- The transmittance of solar total radiation and the transmittance of photosynthetically active radiation (PAR) in a gable-type, single PVC covered greenhouse were studied. 摘要在此研究中量测山型屋顶单层PVC塑胶布温室全日照量与光合成有效辐射量(PAR)之透过率物性。
- Single leaves nearly absorbed all of the ultraviolet radiation(UV) and 71.8%of photosynthetically active radiation,but transmitted 9.6%and reflected 18.6%. 对光合有效辐射的吸收也很大（71.;8%25），透射很小（9
- Analytic results show that stomatal conductivity (cond) , intercellular CO_2 concentration(Ci) and photosynthetic active radiation(PAR) are main influencing factors of net photosynthetic rate in Carya illinoensis K. 影响浙江山核桃日变化的主要因子是蒸腾速率、气孔导度、胞间CO_2浓度、光合有效辐射以及气温； 影响湖南山核桃日变化的主要因子是气孔导度、胞间CO_2浓度以及光合有效辐射。
- The concepts of solar radiation, photosynthetically active radiation (PAR) and ultraviolet radiation are given in Chapter 1. The purposes and structures of this research are also included in this chapter. 第一章介绍了太阳辐射、光合有效辐射、紫外辐射等方面的一些基本概念,简要说明了本文的研究目的与研究内容。
- For the available photosynthetic active radiation (PhAR), energy conversion efficiency (ECE) of the communities was 2.35% in the farming subsystem, 0.97% in the mowing subsystem, and 0.46% in the grazing subsystem. 群落光合有效辐射转化率分别为农田2.;35%25，割草地0
- Lead aprons shield people from radiation. 铅做的工作裙可使人免进辐射。
- Abstract: FAPAR (Fraction of Absorbed Photosynthetically Active Radiation) is an important parameter for remote sensing monitoring plants net primary productivity (NPP) of land ecosystem. 摘要: FAPAR是遥感估算陆地生态系统植被净第一性生产力(NPP)的重要参数。
- Soil water content, photosynthetic active radiation (PAR), air temperature, relative air humidity, water vapor pressure deficit (VPD) and wind speed were measured at the same time. 结果表明：侧柏在不同月份晴天树干液流速率变化具有明显的昼夜节律性，呈单峰曲线；
- Diurnal sap flow was two-peak or mono-peak patterns which maximum sap flow density of the day was not corresponding to photosynthetically active radiation, whereas mono-peak pattern in the year 2000. 在晴天树干液流密度日变化由单峰曲线转变为双峰曲线，或单峰曲线峰值较光合有效辐射峰值显著提前或推后；
- WANG X P,LI B G,GUO Y,et al.Measurement and analysis of the 3D spatial distribution of photosynthetically active radiation in maize canopy[J].Acta Agronomica Sinica,2004,30 (6):568-576. [4]王锡平;李保国;郭焱;等.;玉米冠层内光合有效辐射三维空间分布的测定和分析[J]
- Radiation reached unheard-of levels. 辐射作用已达到前所未有的程度。
- The earth's atmosphere filters out much of the sun's radiation. 地球大气层可以滤掉太阳的大部分射线。
- metallic activation radiation flux detector 金属活化辐射通量探测器
- photosynthetically active radiation 光合成有效辐射
- Photosyntheseically active radiation 光合有效辐射
