9 results about "Litter decomposition" patented technology

The present application relates to the field of environmental analysis, in particular to a forest litter decomposition rate estimation method, system, device and storage medium. The present application aims at the problems of long cycle, great environmental influence, time-consuming and laborious of the existing nylon mesh bag method for determining the forest litter decomposition rate, and the problem of being unable to carry out decomposition research on large-scale forests, and provides a forest litter decomposition rate estimation method, system, device and storage medium, measures and calculates the current year input of the forest litter p and the annual input increment, determines the residual rate constant r of the forest litter through experimental method or searching for relevant data in the past, and combines the residual rate constant r with the OLson single index decomposition model of the forest litter to establish a solution equation of the forest litter decomposition rate. This method has short cycle, does not need to be measured in the field regularly and frequently, has small environmental influence, the parameters and variables in the equation are easy to obtain, time and labor are saved, and decomposition rate research can be carried out on large-scale forests.

The application provides a mature rubber tree fertilization method based on nutrient circulation, which comprises the following steps: step one, establishing a relational expression Y i = litter decomposition + rainfall input + tree leaching + artificial fertilization; Y o = tree absorption + surface runoff; step two, using the soil nutrient balance principle, i.e. nutrient input Y i = nutrient output Y o , the above formula is brought into, and litter decomposition + rainfall input + tree leaching + artificial fertilization = tree absorption + surface runoff is obtained; step three, through nutrient calculation and data analysis, a function relationship between the recommended amount of fertilization Y f of the mature rubber tree and the tree age X is fitted, i.e. Y f =aX 2 +bX+c; the application solves the contradiction that the fertilization management does not meet the production demand caused by the problems such as single rubber tree fertilization formula, old diagnosis technology and difficult-to-determine test analysis index, and has good yield-increasing effect and production practicability.

The application discloses a kind of for decomposing forest litter composite microbial inoculant, preparation method and its application method, it is related to litter decomposition technical field.The application includes a kind of for decomposing forest litter composite microbial inoculant preparation method, comprising the following steps: S1.to Phanerochaete chrysosporium, Trichoderma reesei and ropegillus catenulatum are respectively carried out directional metabolism preactivation;S2.the three preactivation wet bacteria bodies obtained in step S1 are mixed according to the fresh weight ratio of Phanerochaete chrysosporium:Trichoderma reesei:ropegillus catenulatum 3:2:1, obtain mixed bacteria body;S3.mixed bacteria body is mixed with the straw carrier that is preprocessed by steam explosion according to the mass ratio of bacteria body fresh weight:carrier dry weight 1:2, under the condition of temperature 28 DEG C, relative humidity 92~95%, stationary culture 72 hours, carry out phased micro-perturbation aeration, construct physical symbiosis;S4.the material obtained in step S3 is dried to 15% moisture content at 40 DEG C, obtain composite microbial inoculant;Efficient and stable decomposition of pine forest litter is realized.

The invention discloses a greenhouse gas emission indoor culture device for simulating decomposition of lake litters, and belongs to the technical field of environmental science and ecological experiment devices. Comprising a culture tank, a litter fixing device, a closed air chamber, a three-phase sampling unit, a pressure balance module and a temperature control module, a sediment-water covering-air chamber three-layer structure is formed in the culture tank, and a lake water-mud interface and a water-air interface are accurately simulated; the litter fixing device is fixed on a water covering layer or a sediment layer and is adaptive to different types of litters; the three-phase sampling unit synchronously collects water-dissolved greenhouse gas in a gas chamber, a water body and a sediment gap; the pressure balance module ensures pressure stability of the closed space. The device solves the problems that an existing device cannot accurately simulate the lake microenvironment, gas collection is not comprehensive, and environment control is insufficient, has the advantages of being convenient to operate, high in collection precision and suitable for indoor batch experiments, and can be widely applied to lake litter decomposition and greenhouse gas emission research.

The invention relates to a dynamic test device and method for studying forest litter in-situ cumulative decomposition, the dynamic test device comprises a fixing frame and an upper layer frame and a lower layer frame which are respectively arranged on the upper portion and the lower portion of the fixing frame, the upper layer frame is used for collecting litter and can realize yield dynamic study of the litter, and the lower layer frame is used for simulating in-situ litter decomposition. The litter decomposition dynamic research can be achieved, the upper-layer frame body and the lower-layer frame body each comprise a plurality of frame edges and a frame bottom arranged at the bottoms of the frame edges, and the frame bottoms are connected with part of the frame edges through zipper assemblies so that the frame bottoms can be conveniently opened. The device has the advantages of being simple in structure, light in material, durable, reliable, low in price, convenient to carry and easy to install, the research method is simple and convenient to operate, the litter in-situ accumulation and decomposition process is truly reduced, and the research result more truly reflects the natural forest litter decomposition change process.

The application discloses a device and method for monitoring forest litter decomposition rate, which comprises a sealed monitoring container, an internal sampling part for placing litter samples, and integrated gas concentration sensors, carbon dioxide sensors and carbon removal modules with carbon removal functions. The carbon removal module is connected with a weighing module for monitoring the carbon dioxide absorption amount through mass change. The application realizes quantitative evaluation of the litter decomposition process by real-time collection of dynamic changes of gas concentration in the monitoring space, combination of temperature and humidity environmental factors, and use of a decomposition rate correlation model constructed based on the principle of microbial metabolism. Compared with the traditional mass difference method, the application can effectively shield external environmental interference, realize in-situ, high-frequency and accurate real-time monitoring, and provide scientific data support for forest ecosystem carbon cycle research.

The present application belongs to the technical field of plant litter treatment device, and provides a litter decomposition and compaction treatment device. The litter decomposition and compaction treatment device comprises a barrel part, a compaction part and a centrifugal part. The barrel part comprises a main barrel and a rotating inner barrel. The rotating inner barrel is rotatably installed in the main barrel. The compaction part comprises a support group frame, a compaction block and a support slide rail. The support slide rail is installed in the rotating inner barrel at not less than one place. One end of the support group frame is installed on the support slide rail. The centrifugal part is installed in the barrel part, wherein the centrifugal part comprises a centrifugal drum. The other end of the support group frame is installed on the centrifugal drum and is in transmission connection with the rotating inner barrel. Litter is placed in the centrifugal drum, and the compaction block is placed on the surface layer of the litter, and the compaction block is located in the centrifugal drum. The treatment device can be used on a wider range of soil.

The invention provides a method and a system for simulating coupling change of a plant nitrogen library and a soil nitrogen library, and the system comprises a plant nitrogen library dynamic simulation module, a soil nitrogen library dynamic simulation module, a litter decomposition and nitrogen release module, a litter decomposition and nitrogen release module and a soil nitrogen library dynamic simulation module. A plant nitrogen library dynamic simulation module, a soil nitrogen library dynamic simulation module and a litter decomposition and nitrogen release module are coupled, and a complete plant-soil system nitrogen cycle kinetic model is integrated by defining and quantifying nitrogen flux among the modules; and operating the nitrogen cycle kinetic model, and outputting dynamic simulation results of the plant nitrogen library, the soil nitrogen library and each nitrogen flux changing along with time. The internal mechanism of coupling change of the plant nitrogen reservoir and the soil nitrogen reservoir is researched by simulating the change of the nitrogen content under different conditions. The coupling mechanism between the plant and the soil nitrogen reservoir is disclosed, the dynamic change of the coupling mechanism is accurately simulated, and the method has important scientific significance for promoting ecological protection and ecological restoration.

The present application relates to the technical field of biological agent preparation, and particularly relates to a biological agent for accelerating litter decomposition and improving soil fertility, a preparation method and application thereof.The biological agent comprises 20-35 parts of microbial inoculum, 15-25 parts of humus, 10-18 parts of porous carrier, 3-8 parts of citric acid chelate salt and 2-5 parts of slow-release agent.The biological agent prepared according to the components of the present application can degrade the content of cellulose, hemicellulose and lignin in litter, and improve the content of organic matter, total nitrogen, total potassium and available phosphorus in soil, thereby providing a basis for effective degradation of litter.