30 results about "Ecosystem carbon" patented technology

In situ monitoring of soil freezing and thawing device and the method of measuring soil carbon loss based on the device, in order to solve the problem that existing field methods only monitor the carbon emission flux of the entire soil ecosystem, and cannot monitor the contribution of specific soil layers to carbon emissions, and indoor freezing and thawing Thawing simulation experiments cannot truly reflect the problem of soil freezing and thawing process. The soil freezing and thawing device mainly includes a temperature monitor, a soil column chamber, a gas buffer chamber, a rubber sleeve and an air guide pipe. The method of measuring soil carbon loss: put in-situ soil columns of different soil layers into the soil column chamber of the freeze-thaw device, bury them in the corresponding soil layers, monitor the gas CO2 and CH4 emissions during the freeze-thaw period, and compare the freeze-thaw Before and after, the change of soluble organic carbon DOC in the corresponding soil layer was calculated, and then the total amount of soil carbon loss during the freeze-thaw process was calculated. The invention comprehensively calculates the degree of soil carbon loss by synthesizing the change angles of CO2, CH4 emission fluxes and DOC content in different soil layers undergoing freeze-thaw processes, and the precision is increased by 30-50%.

The invention discloses a method for measuring soil CO2 flux in a tidal flat wetland during early and later intertidal periods. The method comprises the following steps: selecting standard sample points in medium and high tide regions of a region to be measured, measuring six groups of CO2 concentration values required for building a model, and drawing a CO2 concentration-time chart; fitting by using an equilateral hyperbolic equation to obtain a regression equation, and calculating a first-order derivative of the equation to obtain the real-time CO2 flux at time periods; performing regression analysis on a relationship between the real-time flux and the real-time concentration by adopting a three-parameter Gauss equation to obtain a model of the soil CO2 flux of the region; quickly obtaining CO2 concentration data in the region to be measured by adopting a portable soil CO2 analyzer; and substituting the obtained real-time CO2 concentration into the obtained equation model to obtain the corresponding soil CO2 flux. The method is easy and liable to implement, can be used for accurately measuring the soil CO2 flux in the tidal flat wetland during the early and later intertidal periods, and can be applied to estimation of carbon sources / sink values of a coastal wetland ecosystem and evaluation of soil efficiency.

The invention relates to a method for increasing saline herbaceous plant organic carbon fixation in the arid desert region. The method includes that performing digging or drilling in plant growing areas of saline herbaceous hexinia chrysanthemum, ceratocarpus arenarius, agriophllum squarrosum or camel thorns when land surface temperature is sustained to be 20DEG C at the end of spring or herbaceous vegetation grows to 10cm; performing digging or drilling in growing season, and applying nitrate nitrogen to a dug belt or a drilled hole. Underground lateral roots of saline herbaceous plants are promoted to grow and develop by the application of nitrate nitrogen nutrition, and the plants are promoted to distribute more biomass generated through photosynthesis to the underground to promote increasing of root shoot ratio and underground root growth so as to achieve the purpose of increasing long-term storage of underground organic carbon of the plants to compensate decreasing of ecosystem carbon fixation capacity due to declining of the plants in the arid desert region.

The invention relates to the field of soil respiration component measurement in soil ecosystem carbon cycle research, discloses a kind of indirect measurement method of moso bamboo forest soil heterotrophic respiration and autotrophic respiration rate, comprising the following steps: (1) selecting sample plot; 2) Determination of soil respiration rate; (3) collecting soil samples and measuring soil sample parameters; (4) establishing a linear relationship; (5) measuring soil related parameters, and calculating soil heterotrophic respiration and autotrophic respiration rates in moso bamboo forests. The present invention selects 5 factors to establish the indirect measurement method of soil heterotrophic respiration and autotrophic respiration rate, compared with the method of directly measuring soil respiration components by using the LI-8100 carbon flux measurement system commonly used at present, the range of numerical deviation is relatively large. Small (plus or minus deviation within 10%), and this indirect measurement method has the advantages of less field work, lower measurement cost, and lower requirements for instrument configuration and operation technology.

The invention discloses a coastal wetland ecosystem carbon storage regulation and management system based on data analysis, relates to the technical field of carbon storage regulation and management, and solves the technical problem in the prior art that the regulation method cannot be reasonably and accurately obtained during carbon storage regulation. Corresponding to the wetland area, the influencing factors are analyzed to determine whether there are influencing factors on the carbon storage in the current wetland area. If there is, adjust according to the influencing factors; otherwise, if it does not exist, adjust according to the unqualified signal, which can improve the adjustment efficiency of the wetland area. and accuracy; the performance of the adjusted wetland area will be tested to determine the eligibility of carbon storage adjustment, so as to accurately analyze the carbon balance performance of the wetland area, and improve the efficiency of carbon storage adjustment; Take precise control.

The invention discloses an extraction method for influence factors of carbon exchange of an ecosystem and a system. The extraction method includes steps of 1), acquiring attribute data of carbon flux samples in a carbon flux data observation station; 2), inputting the attribute data, which are obtained in the step 1), of the carbon flux samples, selecting the optimal combination by the aid of proposed fuzzy rough and reduction integrated algorithm of shuffled frog leaping or quick fuzzy rough and reduction integrated algorithm based on importance, and finding an environmental factor set with the closest relationship with carbon flux; and 3), realizing modeling and stimulating for various environmental factors in the environmental factor set obtained from the step 2) by the aid of a neural network, and obtaining extraction rate of the environmental factors of the carbon flux. The extraction system comprises a data import module, a factor extraction module, an input module and an evaluation module. By the aid of the extraction method and the system, the range of correlation factors of the carbon flux in the researched ecosystem can be effectively reduced, research efficiency is improved, and inherent law among the environmental factors is found.

The invention relates to a trunk CO2 flux measurement device. The trunk CO2 flux measurement device comprises an infrared gas analyzer, a gas passage and a lifting frame used for arranging the infrared gas analyzer and the gas passage connected with the infrared gas analyzer, wherein the gas passage comprises a trunk contact cover, a carbon flux gas chamber contact cover and a steering tube used for connecting the trunk contact cover and the carbon flux gas chamber contact cover, the steering tube is arranged on the lifting frame through a fixing seat, the lifting frame comprises a desktop and desk legs located at the corners of the lower side of the desktop, each desk leg comprises a fixed segment and a telescopic segment located in the fixed segment, the fixed segment is connected with the telescopic segment through a locking device, a bearing platform is arranged between the desk legs, and a rail is arranged on the periphery of the bearing platform. According to the measurement device, the problem that a long-term test problem with high observation efficiency is difficult to carry out in a trunk breath process in the field for a long time is solved, the automation capability of plant trunk CO2 flux observation processes according to time scales such as day and night, seasonal variation and the like is greatly improved, manpower investment is lowered, and valuable data is provided for researches on trunk breath, carbon cycle of forest ecosystems, etc.