一种简单实用的计算小麦累积光合量的方法     

郑有飞  颜景义  万长建 《气象》1996,22(9):22-25

根据１９９２￣１９９４年的田间实际观测资料，提出用Ｌｏｇｉｓｔｉｃ方程求算小麦积光合量的方法，它不但具有明确的生物意义和生态学意义，而且计算极其简便，结果较为精确，不失为一种简单，实用又准确的计算小麦累积光合量的好方法。  相似文献   

Temperature Effects on Photosynthesis and Depth Distribution of the Seagrass Cymodocea nodosa (ucria) Ascherson in a Mediterranean Coastal Lagoon: the Mar Menor (SE Spain)   总被引：2，自引：0，他引：2  

J. Terrados  J. D. Ros 《Marine Ecology》1995,16(2):133-144

Abstract. Seasonal variation of temperature effects on photosynthesis and respiration of Cymodorea nodosa (Ucria) Ascherson was investigated in a 1 m depth meadow in the Mar Menor lagoon (SE Spain). Light-saturated net photosynthesis (P_max)and dark respiration (R) rates were linearly correlated with water temperature between 10 and 30°C. and 10 and 35°C, respectively, during the year. Water temperature had a similar effect on R rates in August, November, and February, but increased P_max rates in August vs. those in February, thus promoting a shift of the maximum P_max/R ratio values from 15°C in February to 30°C in August. P-I curves had higher P_max values in May and August than in November or February, while Ic values remained relatively constant throughout the year. Whole-plant carbon balances suggested that C. nodosa might not be able to survive in the central basin of the lagoon and that the spatial distribution of this seagrass in the Mar Menor might be controlled by light availability.  相似文献   

高CO_2浓度对石莼光合作用及营养盐吸收的影响   总被引：3，自引：0，他引：3  

邹定辉  高坤山  阮祚禧 《中国海洋大学学报(自然科学版)》2001,31(6)

在室外自然条件下用高 CO2 浓度的空气 (5 0 0 0μL CO2 · L-1)通气培养石莼 (Ulvalactuca) 9～ 10 d,以探讨高 CO2 浓度对石莼生理特性的影响。结果表明 ,在高 CO2 浓度条件下 ,石莼的生长速率没有明显改变。而石莼的光合能力下降 ,光合参数如光合效率、羧化效率及光饱和点也都下降 ;但在高 CO2 浓度条件下 ,石莼培养液中营养盐浓度的下降速度增加 ,且 NO-3 浓度下降速度的相对促进量比 PO3 -4 浓度下降速度的相对促进量更大  相似文献   

浮游植物初级生产力自动测量仪及其测量不确定度研究     

张世强  宋家驹  郭长松 《海洋技术学报》2007,26(2):19-22

简要介绍了最新研制的浮游植物初级生产力自动测量仪的工作原理和系统组成,并对其测量不确定度进行了探讨。  相似文献   

测量型光生物反应器的研制     

张世强  宋家驹 《海洋技术学报》2007,26(1):26-28

介绍了一种新型的、小型的光生物反应器。其利用发光二极管光电板作为光源并利用内置微型泵进行搅拌。这使得光生物反应器小型化,其容积仅190 ml。该光生物反应器照度可调、温度可控,其可以用于浮游植物光合速率的测量。  相似文献   

Photosynthesis, Respiration and other Factors Influencing the Growth of Laminar/a ochroleuca PYL below 50 Metres in the Straits of Messina     

Edward A.  Drew  John F.  Ireland  Colin  Muir  William A. A.  Robertson John D.  Robinson 《Marine Ecology》1982,3(4):335-355

Abstract. The population of Laminaria ochroleuca in the current swept Straits of Messina was investigated regarding its age structure and photosynthesis. Age structure appears to be determined by sporadic recruitment and the limitation of growth due to peak currents decapitating older plants, which is corroborated by drag force resistance calculations. The calculation of a carbon budget from measurements of photosynthesis and dark respiration both in the laboratory and in situ shows that L. ochroleuca cannot satisfy its carbon demands for growth and respiration at 50 m depth and no satisfactory explanation can be given for its rapid growth between 50 and 100 m.  相似文献   

The effect of encrusting bryozoans on the photosynthetic activity of Fucus serratus L.     

R. C. Oswald  N. Telford  R. Seed  C. M. Happey-Wood 《Estuarine, Coastal and Shelf Science》1984,19(6):697-702

A photosynthetic gradient along the fronds of the serrated wrack, Fucus serratus L. is described. Within the epifaunal communities associated with the fronds of F. serratus certain species are known to settle preferentially in the distal, less heavily encrusted, regions of the plant; thus a gradient in photosynthetic activity could provide an important mechanism by which the prospecting larvae of such species are able to discriminate between different regions along individual fronds. Photosynthesis is significantly depressed in F. serratus fronds which are heavily fouled by the fleshy encrusting bryozoans, Alcyonidium hirsutum (Fleming) and Flustrellidra hispida (Fabricius). Electra pilosa (L.), a calcareous opportunistic bryozoan, has a less marked effect on photosynthetic activity. The selective costs of dense epifaunal assemblages on their algal hosts are briefly discussed.  相似文献   

Ecophysiological characteristics of four intertidal marine macroalgae during emersion along Shantou coast of China, with a special reference to the relationship of photosynthesis and CO₂     

ZOU Dinghui  GAO Kunshan 《海洋学报(英文版)》2005,24(3):105-113

Intertidal marine macroalgae experience periodical exposures during low tide due to their zonational distribution. The duration of such emersion leads to different exposures of the plants to light and aerial CO2, which then affect the physiology of them to different extents.The ecophysiological responses to light and CO2 were investigated during emersion in two red algae Gloiopeltis furcata and Gigartina interrnedia, and two brown algae Petaloniafascia and Sargassum hemiphyllum, growing along the Shantou coast of China. The light-saturated net photosynthesis in G. furcata and P. fascia showed an increase followed by slightly desiccation, whereas that in G.interrnedia and S. hemiphyllum exhibited a continuous decrease with water loss. In addition, the upper-zonated G. furcata and P. fascia,exhibited higher photosynthetic tolerance to desiccation and required higher light level to saturate their photosynthesis than the lower-zonated G. interrnedia and S. hemiphyllum. Desiccation had less effect on dark respiration in these four algae compared with photosynthesis. The light-saturated net photosynthesis increased with increased CO2 concentrations, being saturated at CO2 concentrations higher than the present atmospheric level in G. furcata, G. intermedia and S. hemiphyllum during emersion. It was evident that the relative enhancement of photosynthesis by elevated CO2 in those three algae increased, though the absolute values of photosynthetic enhancement owing to CO2 increase were reduced when the desiccation statuses became more severe. However, in the case of desiccated P. fascia (water loss being greater than 20 %), light saturated net photosynthesis was saturated with current ambient atmospheric CO2 level. It is proposed that increasing atmospheric CO2 will enhance the daily photosynthetic production in intertidal macroalgae by varied extents that were related to the species and zonation.  相似文献   

Verification of Net Primary Production Estimation Method in the Mongolian Plateau Using Landsat ETM＋ Data     

XIONGYan KanakoMuramatsu MasahiroHirata KazatoOishi IchirowKaihotsu TamioTakamura ShinobuFurumi NoboruFujiwara 《地球空间信息科学学报》2004,7(2):117-122

We plan to estimate global net primary production (NPP) of vegetation using the Advanced Earth Observing Satellite-Ⅱ (ADEOS-Ⅱ) Global Imager (GLI) multi-spectral data. We derive an NPP estimation algorithm from ground measurement data on temperate plants in Japan. By the algorithm, we estimate NPP using a vegetation index based on pattern decomposition (VIPD) for the Mongolian Plateau. The VIPD is derived from Landsat ETM multi-spectral data, and the resulting NPP estimation is compared with ground data measured in a semi-arid area of Mongolia. The NPP estimation derived from satellite remote sensing data agrees with the ground measurement data within the error range of 15% when all above-ground vegetation NPP is calculated for different vegetation classifications.  相似文献   

CLIMATE CHANGE IN CHINA AND ITS INFLUENCE ON AGRICULTURE PRODUCTION IN THE LAST 40 YEARS          下载免费PDF全文

Zhang Jiji  Xu Xiangde  Miao Junfeng 《Acta Meteorologica Sinica》1993,7(1):110-114

Using the meteorological data set for 1951—1990 over 160 stations,a series of 10-year running mean curves oftemperature and precipitation averaged for the country and its 7 climate regions,as well as for each season,are obtainedand analyzed.The six aspects of main results can be summarized about the climate change in China and its influence onagriculture production in the last 40 years.  相似文献