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When plants absorb more light than that can be used for photosynthesis, the excess energy, which is not promptly quenched, can reduce the photosynthetic efficiency and result in photoinhibition, even photooxidative damage to the photosynthetic reaction center.

然而,大多数情况下植物接受的能量要超过其所能转化的能量,如果过量的光能不及时耗散掉,光合功能会降低,导致光合作用的光抑制,甚至出现光氧化、光破坏。

The extinct coefficients being greater for photosynthetically active radiation than those for total radiation are closely related to the inverse proportion of solar altitudes (sinh0) during one day.

光合有效辐射的消光系数大于总辐射的消光系数;一天中,群体下部的光照条件以中午前后为佳,消光系数最小;k值与太阳高度角的正弦成反比。

In the submodel, the reflection coefficient of the canopy changed with the sine of the solar angle and the relationship between the extinction coefficient for photosynthetically active radiation and PDT was quantified.

模型引入高斯积分法简单有效地计算冠层每日的总光合量,并考虑了冠层辐射反射率的日变化及消光系数随生理发育时间的变化,使模型对冠层辐射吸收与光合作用的定量更加准确。

Treating with different concentration of PEG 6000 in 1/2 Hoagland nutrient solution for 3 days, the physiological indexes , such as, Pn, chlorophyll fluorescence parameters, cell membrane permeability, MDA and relative water contents of Plantago asiatica L. and Viola philippcia Cay, were studied. The Pn of P. asiatica and V.

在不同浓度的PEG6000的1/2Hoagland营养液水分胁迫条件下,对处理3d的车前和紫花地丁的净光合速率、叶绿素荧光参数、细胞电解质外渗率、相对含水量和丙二醛含量等指标进行了测定和分析。

Effects of quinhydrone, as urease inhibitor, on growth, root activities, nitrogen metabolism, photosynthetic character, yield as well as quality were studied under pot experiment with water spanich and plot experiment with B.chinensis Var.comrtzunis. The results were shown as follow: 1. Applying low and medium amount quinhydrone promoted the growth of water spanich and B.chinensis Va,communis, whereas high amount treatment had little effect on water spanich growth, and inhibited the growth of B.chinensis Var communis.

以醌氢醌为脲酶抑制剂,蕹菜和小白菜为试材,研究了不同用量的醌氢醌对这两种蔬菜生长、根系活性、氮代谢、光合特性以及产量、品质的影响,结果表明:1 低、中量醌氢醌能促进蕹菜、小白菜的生长,高量醌氢醌对蕹菜的促进作用不大,对小白菜生长有抑制作用。

The biomass photosynthesis activity of Ruppia maritima and Potamogeton pectinatus and the proline,malondialdehyde,catalase,and chlorophyll contents in their leaf-tissues in response to salinity were studied by investigating the plants cultured with reclaimed wastewater of different salinities.

通过在不同盐度再生水中培养川蔓藻和蓖齿眼子菜,研究了它们的生物量、光合强度及其组织中的脯氨酸、丙二醛、过氧化氢酶和叶绿素的含量变化对再生水中盐度的响应。

Sing Scenedesmus obliquus entrapped in calcium-al-ginate gel for purifying sewage,this paper studied the purification efficiencies of ammonia-nitrogen and ortho-phosphate by immobilized algae and its changes of growth, the content of chlorophyll a, photosynthesis and per oxidase,and comparison with free algae.

将斜生栅藻包埋固定在褐藻酸钙凝胶胶珠中。对人工配制的污水进行净化,研究其对污水中氨氮和正磷酸盐的净化效率以及净化过程中藻类的生长,叶绿素α含量、光合强度和过氧化物酶活性的变化。

The result showed that the photosynthetic rate, chlorophyll-a content and chlorophyll-b content decreased significantly with the increase of salinity concentration and the prolongation of stress time, while the stomatic conductance and intercelluar CO2 content decreased early and then increased.

结果表明,盐胁迫条件下,净光合速率、叶绿素a含量、叶绿素b含量随着盐胁迫浓度的增加和时间的延长总体上呈现下降趋势,而气孔导度和胞间CO2浓度总体上呈现先下降后上升的趋势,叶片Chlb/Chla比值随盐胁迫时间的延长逐渐升高。

Result Compared with the traditional shaping mode of fan type, the types of L and FI could significantly increase the leaf area and the average berry weight and the L type could significantly increase the chlorophyll content, stomatal conductance and Rubisco activity of leaves and increase the photosynthesis rate of leaves at last in the rapid growth period of berry; all the shaping types of L, FI and V could increase the average berry weight and the soluble solid content in fruit to different degree and decrease the of titrable acidity content in fruit.

结果]与传统的扇形整型方式相比,L型和FI型整型方式明显提高葡萄的叶面积和平均单果重;在果实迅速膨大期,L型还显著提高叶片的叶绿素含量、气孔导度和Rubisco活性,使叶片的光合速率显著提高;L型、FI型和V型整型方式均不同程度提高葡萄平均单果重和可溶性固形物含量,降低果实可滴定酸含量。

The current reiew of the interrelationship of product,quality, culture type,and media type for economically feasible system; the technical condition on climatological factors, carbonating,the need for mixing, seperating,harvesting and drying; and the progress of mass culture on Chlorella was summarized in this paper. The future development trends of mass culture will be automatic photosynthetic reactor culture.

本文就小球藻大规模培养中产量、质量、培养方式、培养基与经济上的可行性之间的关系;气候因子、二氧化碳补加、搅拌、分离、收获与干燥等技术条件及其研究的进展进行了综述,认为未来的发展趋势将是光合生物反应器培养。

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