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136 results about "Plant population" patented technology

The plant population definition is similar to the human population. It is the number of plants the farm can accommodate; through this, one will determine the number of seeds or sucker or other planting material to use for planting operation.

Method for reducing and controlling wastewater pollution of pig farm

The present invention discloses a method for reducing and controlling wastewater pollution of pig farm, comprising the steps of: A, using a solid-liquid separation facility for performing solid-liquid separation of pig farm waste, stacking the solid waste for fermentation to produce an organic fertilizer; B, building a four-level biomass purification tank treatment system, constructing biomass purification tanks which are connected by pipes, putting straw in the biomass purification tank of each level; C, building a five-level green watermifoil ecological wetland treatment system including ecological wetlands which are naturally divided by ridges, planting green watermifoil, culturing the green watermifoil into a plant population, keeping an up level ecological wetland and a down level ecological wetland including a first level ecological wetland, a second level ecological wetland and a third level ecological wetland to facilitate the flow and purification of waste water. The method is easy to operate and low in construction cost, does not need running cost, and is suitable for application and promotion in pig farms in the majority of sub-tropical areas in middle and lower reaches of the Yangtze River.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI

Testing method and testing device for fog-droplet deposition on basis of similarity of crop porosity

The invention relates to a testing method for fog-droplet deposition on the basis of similarity of crop porosity. The method comprises the following steps: selecting a deposition testing area according to the forms of crop plant populations, on the basis of porosity measurement of leaves at different layers of population plants, abstracting population crop plants into a plurality of layers from high to low, and leading the porosity of the leaves at the abstracted and simplified layers and the actually-measured porosity of the leaves to be same by different arrangement and combination modes. In order to adapt to testing of the fog-droplet deposition characteristic of the leaves under different spraying modes, the leaves are abstracted into three perpendicular geometries with the same size according to the need. The invention also relates to a testing device for fog-droplet deposition on the basis of similarity of crop porosity. The testing device comprises a mechanical bracket, a plant abstract leaf array, a traveling chassis, a spraying system and a control unit. The testing method and the testing device have the advantages that testing of the fog-droplet deposition amount in a three-dimensional space of different crops in different growth forms and different spraying modes is realized, and simultaneously, the standardization of the testing process is easy to realize.
Owner:SHANDONG AGRICULTURAL UNIVERSITY

Method for determining target water area submerged plant recovery area

The invention discloses a method for determining a target water area submerged plant recovery area. The method includes the steps of (1) determining sampling points of a target water area, and measuring data including the water body depths, the ignition losses and the different-gradient water depth illumination intensities, (2) obtaining attenuation coefficients K of photosynthetic effective radiation of the sampling points, (3) calculating submerged plant population light compensation depths HC of the sampling points, (4) determining an assessment criteria of submerged plant recovery, wherein LOI serves as the ignition losses, and Qi serves as specific values of the submerged plant population light compensation depths to the water body depths; (5) making thematic maps of the LOI vectors and the Qi vectors, and (6) overlaying the thematic maps through a space analysis module of a geographic information system to obtain nine combinations. By means of the method, the submerged plant population recovery area has specific boundaries, and the operability is high; the recovery area has the step performance, a proper area can be preferentially recovered, and a transition area is then recovered after the conditions such as the transparency and bottom mud are met.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Method to Screen Plants for Genetic Elements Inducing Parthenogenesis in Plants

Compositions and methods for producing a plant population lacking sexually derived embryos are provided. Compositions include suppression cassettes encoding polynucleotides and promoters resulting in parthenogenesis. Further provided are parthenogenesis genetic elements used to prevent sexual reproduction in self-reproducing plants.Methods include: utilizing maternal embryo defective recessive mutations which are maintained as a sterile inbred maintenance system, allowing generation of populations that are homozygous for recessive mutant alleles, but transgenically complemented. Methods include utilizing a toxin genes expressed via egg-cell specific promoters, creating a dominant, embryo-less phenotypes, non-transmittable through female gametes. Resultant hemizygous plants are transformed with egg-cell promoters driving the antidote, a pollen ablation PTU and a seed color marker for identification of transgenic seed. The generation of a plants 50% female fertile, having seed which when grown in the next generation will yield plants with 50% viable transgenic seed, and 50% non-viable embryo-less seed.
Owner:PIONEER HI BRED INT INC

Portable device for determining vertical profile distribution of CO2 concentration in plant population

The invention provides a portable device for determining vertical profile distribution of CO2 concentration in plant population, which consists of a gas collector, a gas circuit switcher, an air filter, an air pump, an infrared gas analyzer and a system support. The CO2 concentration in air at different levels is measured by switching gas circuits to obtain vertical profile distribution of the CO2 concentration in plant population. The device has the advantages of convenient movement, low fabrication cost, flexible and convenient use and accurate data obtained, and can be adjusted according to the height of target plants and measuring requirements, thus meeting the requirement of wild environment.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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