5 results about "Plant litter" patented technology

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 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.