8 results about "Plant litter" patented technology

The invention discloses a lake eutrophication biological treatment system and a dynamic method based on multi-dimensional cooperative regulation and control. Exogenous pollution control, layered biological manipulation and artificial intelligence dynamic feedback are fused, and the method is particularly suitable for moderate eutrophication water bodies with nitrogen and phosphorus exogenous input not completely cut off. According to the gradient filling structure, macromolecular organic matters are intercepted by using shallow coarse particles, and middle / fine particles specially attack phosphate adsorption, so that graded removal of pollutants is realized; fish ingestion and benthic organism disturbance have a synergistic effect, secondary pollution of aquatic plant litter degradation to a water body is reduced, transfer of nitrogen and phosphorus from the water body and plant litters to animal objects is promoted, and the coupled system can reduce the phosphorus release rate of bottom mud, improve the stability of FePO4 precipitation and synchronously degrade sulfides and organic matters in the bottom mud; electric shock damage to benthic organisms is avoided through the micro-current intensity, sulfur metabolites can be used as a nutrient source of submerged plants, and biological self-purification and resource utilization of eutrophic water are achieved.

The application discloses a kind of environmental risk assessment methods of heavy metal decomposition and release of plant litter in contaminated land, comprising: obtaining the environmental parameters of contaminated land;Collecting the litter mixed sample of surface plant litter layer, detecting the moisture content of litter mixed sample and the content of various heavy metals;Through litter releasable heavy metal analysis method, detect the releasable content of various heavy metals in litter mixed sample;According to the data obtained and detected above, calculate the annual release flux of litter heavy metals per unit area of contaminated land;According to the environmental parameters of contaminated land and the annual release flux of litter heavy metals per unit area, evaluate the environmental risk of single heavy metal in litter decomposed and released with rainfall, and the comprehensive environmental risk of litter heavy metals decomposed and released with rainfall.The application can quickly, accurately and economically assess the potential risk of heavy metal decomposition and release of plant litter in contaminated land to the surrounding soil and water environment.

The application provides a lake dissolved organic matter quantitative tracing method based on molecular fingerprint and application thereof, and relates to the technical field of environmental analysis and water ecological management. The method comprises the following steps: collecting end member samples such as lake water and sediments, surface soil, plant litter, chemical fertilizer, livestock and poultry manure, tail water of a sewage treatment plant, tail water of aquaculture, etc., and enriching DOM through solid phase extraction; then obtaining molecular formula data through mass spectrometry; screening stubborn inert molecules that satisfy H / C < 1.5, conversion times of 0 and exist only in a single end member, and verifying the ecological conservation thereof through -2 < betaNTI < 2 and -0.95 < RCBray < 0.95; adopting SHAP algorithm to optimize a high-contribution molecular feature subset, and inputting the high-contribution molecular feature subset into a MixSIAR model to output the contribution proportion of each end member and the 95% confidence interval. The method guarantees the reliability of the tracer from the mechanism, breaks through the bottleneck of spectral overlap, and realizes accurate and reliable quantitative disassembly of endogenous and exogenous DOM.

The embodiment of the invention provides plant litter collecting and cleaning equipment for garden landscape construction, and relates to the field of garden equipment. Comprising a base, a shell, wheels, a rotating shaft and a collecting mechanism; the shell is mounted at the top end of the base; the number of the wheels is four, every two wheels form a group, the two groups of wheels are rotationally mounted at the bottom end of the base, and the two wheels in each group are connected through a rotating shaft; the collecting mechanism is mounted at the top end of the shell; the collecting mechanism comprises a mounting base, an air suction pipe, a partition plate, a middle cylinder, a fan, a discharging opening, a control panel, a through hole and an air baffle. The mounting seat is of a hollow cylindrical structure; and the middle cylinder is mounted in the center of the mounting seat. The device can suck litters on the ground, it can be guaranteed that the inner space of the mounting base is alternately opened in the advancing process of the device, it can be guaranteed that litter suction and discharging work are alternately conducted, it can be guaranteed that mutual interference is avoided, and then it is guaranteed that work of the device is continuously conducted.

The invention discloses a method for limiting a coastal wetland carbon emission source, which comprises the following steps: collecting coastal wetland sediments, salt-tolerant plant litters and root systems and phytoplankton in a nearby sea area, and measuring to obtain carbon nitrogen ratios and organic carbon nitrogen isotopes of the coastal wetland sediments, the salt-tolerant plant litters and the root systems and the phytoplankton in the nearby sea area; establishing an isotope mixing and fractionation model according to the carbon and nitrogen contents and the organic carbon and nitrogen isotopes, and calculating organic matter sources and contribution proportions based on the isotope mixing and fractionation model; the method comprises the following steps: collecting surface greenhouse gas according to a static box method, and measuring CH4 and CO2 bias pressure and isotopes through an isotope laser spectrometer so as to establish a gas isotope mixing model and a mass balance model; according to the gas isotope mixing model, the mass balance model, the organic matter source and the contribution proportion, the coastal wetland carbon emission source is limited, and the problem that the coastal wetland carbon emission source is difficult to determine is solved.

The invention relates to the technical field of environmental ecology, in particular to application of a plant-litter-soil continuum in a terrestrial ecosystem. The method comprises the following steps: S1, setting a plurality of standard sample plots in a research area; s2, litter samples and soil samples with different depths in the sample plot are collected; s3, calculating an important value, a community diversity index and a stability index of the plant; s4, evaluating a response mechanism of the plant to soil elements through the homeostatic state model; and S5, disclosing a migration path and a driving mechanism of elements in the plant-litter-soil continuum by utilizing statistical analysis and a structural equation model. According to the application of the plant-litter-soil continuum in the terrestrial ecosystem, provided by the invention, the complex relationship among plant-litter-soil and microbial biomass stoichiometric characteristics is disclosed; the plants, the litters and the soil are closely associated and jointly promote nutrient circulation of the system.

The utility model relates to the technical field of plant litter collecting equipment, in particular to a plant litter sample collecting device, which comprises a blocking fabric made of canvas, the blocking fabric adopts a triangular design, three end parts of the blocking fabric are fixedly connected with fixing rings, and penetrating holes are formed in the fixing rings; according to the litter sample collecting device, the blocking fabric is fixed below a plant needing to collect a litter sample through the supporting rod, so that when leaves or branches and other parts of the plant fall down as litters, the litter sample can be collected through the supporting rod, the litter sample can be collected through the supporting rod, and the litter sample can be collected through the supporting rod. According to the plant litter collecting device, the plant litter can directly fall to the position above the blocking fabric, finally, the plant litter above the blocking fabric is collected to serve as a sample, and interference caused by the fact that the collected plant litter sample is mixed with litter of non-target plants, dust, insect excrement or biting of rodents can be avoided.

The invention discloses a submerged plant litter separation device, which relates to the technical field of water ecosystems, and comprises a first screening part, a second screening part, a separation barrel, a stirring device and a washing spray gun which are arranged from top to bottom, the circumferential edges of the first screening part and the second screening part are connected to the supporting frame, the first screening part and the second screening part incline downwards from the circumferential edges to the middle, and a first discharging opening is formed in the bottom end of the second screening part; when the submerged plant litter is separated, firstly, large-particle-size stones in a sample are screened out by adopting a washing spray gun, then, silt in the sample on the second screening piece is washed out through screening holes in the second screening piece by adopting the washing spray gun, and then, the remaining sample on the second screening piece is washed into a separation barrel; after stirring, litters are suspended in water, impurities such as fine gravels and shells sink to the water bottom, and the device does not need to manually pick the impurities such as stones and shells, so that the separation efficiency is improved, and the purity of a sample obtained by separation is improved.