3 results about "Contaminated land" patented technology

This invention discloses a land remediation device and method, relating to the field of heavy metal contaminated land remediation technology in the advanced environmental protection industry. The device comprises a vehicle and a rotary tiller. A mounting frame is fixedly connected to the side wall of the rotary tiller, and two symmetrically arranged movable frames are connected to the side wall of the mounting frame via a first reset mechanism. A downwardly inclined shovel plate is fixedly connected to the side wall of each movable frame, and two inclined guide plates are fixedly connected to the side wall of the shovel plate. This land remediation device and method can transport and evenly spread broken soil. During the spreading process, reducing agents are evenly sprayed onto the soil, resulting in more uniform mixing. Simultaneously, it can cover the sprayed microbial solution, thereby improving the efficiency and effectiveness of soil remediation. Furthermore, it allows for automatic adjustment of the spraying volume based on the vehicle's movement speed, ensuring spraying effectiveness while avoiding waste of microbial solution and reducing agents.

The present application belongs to the technical field of plant genetic engineering, and relates to a heavy metal related isoprenylated plant protein gene SsHIPP6 of sudangrass and application thereof. The sequence of the sudangrass SsHIPP6 gene is selected from the nucleotide sequence shown in SEQ ID NO:1, a complementary nucleotide sequence or a variant having >95% homology, and when overexpressed in plants, the variant can reduce the cadmium accumulation in the aboveground part by >26.9% and the cadmium accumulation in the root system by >27.4%. The gene can effectively improve the resistance of plants to cadmium stress. By overexpressing the gene, the cadmium accumulation in the aboveground part of the plant can be reduced by >26.9%, and the cadmium accumulation in the root system can be reduced by >27.4%, thereby enhancing the survival rate and growth ability of the plant in cadmium contaminated soil, providing a possibility for planting high-quality forage grass on heavy metal contaminated land, and having important significance for guaranteeing the ecological safety of agriculture and the sustainable development of animal husbandry.

This invention belongs to the field of saline-alkali land improvement technology, and discloses a system and method for constructing a physical isolation layer and in-situ regenerating a arable layer in saline-alkali land. The system integrates eight units and pioneers a "non-excavation in-situ membrane laying + simultaneous pipe laying" process to achieve a fully integrated process of "physical isolation + permeable drainage + soil improvement + field division + water and fertilizer maintenance". A closed-loop isolation system is constructed using isolation field ridges containing 15-20% quicklime and 0.6-1.5mm (lifespan over 50 years) HDPE membranes. This is combined with permeable blind pipes and a field ridge drainage system, along with drip / micro-irrigation technology and fish protein compound enzyme fertilizer with a molecular weight ≤500Da, forming a closed loop of "treatment-maintenance-yield increase". It overcomes the pain points of traditional technologies, shortens the treatment cycle by more than 80%, increases crop yield by 30-50%, saves more than 60% of water, and improves soil microbial activity by more than 25%. After improvement, the soil salinity is ≤0.1% and the pH value is 6.5-7.5. It has high desalination efficiency and stable effect, and is suitable for the improvement and cultivation of various types of saline-alkali land and heavy metal contaminated land.