A modular cultivation method for heavy metal hyperaccumulation plants

Abstract

The invention discloses a modular cultivation method for heavy metal hyper-accumulating plants. The method comprises the steps of module box preparation, seedling raising preparation, seedling raising, transplanting, management after transplanting, harvesting and the like. According to the method, the plants are cultivated in a modular mode, controllable regulation is achieved, not only is the planting density evener, but also the labor costs are greatly reduced in industrialized and modular conveying and other operation from seedling raising to transplanting, the growth of the plants is continuous and good, the quantity of absorbed heavy metals is relatively high, the capability is relatively high, and in particular, the root-layer grass-free comprehensive effect is very obvious.

Description

technical field [0001] The invention relates to the cultivation technology of heavy metal hyperaccumulation plants, in particular to a modular cultivation method of fibrous root system heavy metal hyperaccumulation plants, and belongs to the technical field of soil phytoremediation. Background technique [0002] Heavy metals refer to a class of metal elements with an atomic density greater than 5g / cm3. There are about 40 types, mainly including Cd, Cr, Hg, Pb, Cu, Ag, Zn, Sn, etc. However, from the perspective of toxicity, As, Se, Al, etc. are generally included. [0003] Heavy metal hyperaccumulation plants refer to plants that can absorb and accumulate heavy metals in excess. They use their roots to absorb one or more heavy metals from the soil, and transfer and store them into the roots, stems, and leaves of plants. Plants thereby remove heavy metals from the soil. Hyperaccumulative plants often grow on soil with high heavy metal content for a long time, and are formed ...

AI Technical Summary

Problems solved by technology

Some hyperaccumulator plants have small plants, low biomass, and slow growth; moreover, plant organs will rot and lose leaves, causing heavy metals to return to the soil

[0005] There are differences between the original growth environment of heavy metal hyperaccumulative plants and the heavy metal polluted soil environment that needs to be improved. In addition, the environmental survival competitiveness of most of these fibrous heavy metal hyperaccumulative plants is relatively weak, so it is easy to be mixed in the heavy metal polluted soil planted. Grass life; no matter it is seed direct seeding or cutting seedling planting, due to the difficulty of artificial cultivation and the weak growth of the plant itself, the planting density is often not guaranteed to be uniform, so the root system is not evenly distributed, resulting in a relatively small amount of heavy metal absorption by the plant. It is also relatively weak and cannot fully absorb heavy metals in the soil.

In addition, the existing cultivation techniques for these fibrous root heavy metal superaccumulative plants are not convenient for mechanization, factoryization, and programmed management operations. It is difficult to transplant, manage in the field, and harvest after planting. Tube, the labor cost required is very large

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