CN102476864B - Rapid self-forming method of vallisneria natans underwater meadow - Google Patents

Abstract

The invention discloses a rapid self-forming method of a vallisneria natans underwater meadow, relating to a large-area and large-scale water environment biological treatment technique. The method comprises the steps of: (1) collecting fertile lake mud, clay and degradable fibres; (2) preparing a vallisneria natans culture substrate according a volume ratio of the lake mud, the clay to the degradable fibres of 40: 40: 20 and filling the culture substrate in a detachable mould which is 60 cm in length, 30 cm in width and 8 cm in height; (3) putting the mould in a cement pond which is good in illumination conditions and has adjustable water level; (4) collecting healthy and strong winter buds of the vallisneria natans and sowing the buds in the culture substrate; and (5) adjusting the water level in the cement pond duly according to growth height of the vallisneria natans so that the vallisneria natans can grow rapidly and thereby are branched and combined to form the meadow. The rapid self-forming method of the vallisneria natans underwater meadow disclosed by the invention can produce plenty of vallisneria natans meadows in a large scale, is convenient for implementation and construction, and can rapidly and efficiently recover submerged plants in a nutrient-rich shallow lake so that a foundation for further optimizing aquatic plant community is provided, thereby aquatic ecosystem structure is improved and ecological system stabilization is promoted.

Description

Rapid self-forming method of callisneria natans underwater meadow

Technical field

The present invention relates to a kind of big area mass-producing water environment biological improvement technology, relate in particular to the quick self-forming method of the water-bed grassy marshland of a kind of submerged plant eel grass (Vallisneria natans).

Background technology

Current, qualified discharge, forest vegetation do not destroy and the problem ubiquities such as soil erosion aggravation due to China's polluted-water, make the nitrogen and phosphorus load of the receiving water bodies such as river, lake increase, water transparency descends and the body eutrophication outstanding problem, the aquatic vegetation area atrophy that brings, species diversity falls sharply, and the careless type in lake-clear water attitude more and more highlights to algae type-muddy water attitude conversion series ecological problem.

Submerged vegetation is one of lake aquatic ecosystem important component part, has important ecological significance aspect stable keeping aquatic ecosystem; It can not only be for Herbivore provides food source, protects the place for zooplankton and fish provide, and can also play purifying water, and prevents the effects such as settling suspends again.Yet China's overwhelming majority lake is because eutrophication is aggravated at present, and water transparency sharply descends, and the severe situation that multiple submerged plant disappearance, submerged vegetation area reducing, vegetation and plant species simplification and lake become secondary barren occurs.Recover the aquatic vegetation in China lake, be considered to repair the eutrophic lake wetland, carry out the restoration of the ecosystem in lake and improve the important means of lake service function.Yet, due to technical reason, recover waterplant in and lake that vegetation degeneration is serious dark at water body very difficult, often cost is high to recover waterplant in these lake regions, small scale can not reverse the water body situation of lake region, finally is difficult to keep the healthy growth of aquatic vegetation.

Vallisneria (Vallisneria) is heavy this plant of pasture and water of Hydrocharctaceae (Hydrocharitaceae).The growth of this platymiscium is fast, and regenerative power is strong, is the important foodstuffs source of herbivorous fishes and palmipeds, be lake ecosystem build group species and important component.In recent years, China's Freshwater ecosystems are degenerated serious, the good material that the waterplant of Vallisneria is considered to alleviate water body eutrophication degree and rebuilds aquatic vegetation.Under optimum conditions, eel grass can form a large amount of ramets fast by walking stem, and the root system of a large amount of ramets can be fixed the formation of growth substrate and be similar to the turf of using in gardens.Thereby the quick self-forming technology of the water-bed grassy marshland of eel grass provides theory and practice basic.

Summary of the invention

Purpose of the present invention just is to provide a kind of rapid self-forming method of callisneria natans underwater meadow for the prior art present situation.

The object of the present invention is achieved like this, namely comprises the following steps:

1. gather fertile lake mud, clay and biodegradable fiber;

2. press lake mud: clay: the volume ratio preparation eel grass culture medium of biodegradable fiber=40: 40: 20, and culture medium is inserted in long 60cm * wide 30cm * high 8cm Collapsible mould;

3. this mould is put into that illumination condition is good, the cement pit of regulating level;

4. gathering healthy and strong eel grass hibernaculum is seeded in culture medium;

5. according to the growing height timely adjustment cement pit median water level of eel grass, can Fast Growth, thus a minute bark of a cork tree is formed grassy marshland.

Principle of work of the present invention:

The appropriate combination of fertile lake mud and clay adds biodegradable fiber to be conducive to the eel grass root system and is combined with culture medium and forms firm grassy marshland for the growth of eel grass provides sufficient nutrient and suitable growth matrix; Progressively flooding to guarantee the growth conditionss such as illumination that eel grass is good, makes eel grass energy Fast Growth; Stop after eel grass reach a certain height rising stage can allow eel grass with more energy distribution to vegetative propagation, produce a large amount of minutes barks of a cork tree.

The present invention has following advantages and positively effect:

1. can mass-producing produce in a large number eel grass grassy marshland;

2. convenient the input constructed;

3. the efficient recovery submerged plant can be arranged fast in eutrophic shallow lake, provide the basis for further optimizing aquatic vegetation, thereby improve the aquatic ecosystem structure, promote the ecosystem stable.

Embodiment

The first step: the requirement of total amount estimation fertile lake mud, clay and biodegradable fiber as required, and adopt nearby, economic principle gathers these raw materials, notices that lake mud and clay all should not be subjected to serious pollution, guarantee that eel grass can survive and grow;

Second step: in lake mud: clay: the biodegradable fiber volume ratio is about the ratio preparation eel grass culture medium of 40: 40: 20, and culture medium is inserted in long 60cm * wide 30cm * high 8cm Collapsible mould;

The 3rd step: the mould interval that will fill culture medium puts into that illumination condition is good, the cement pit of regulating level, and initial water level just floods the culture medium surface, places stand-by;

The 4th step: amount (needing to consider that the eel grass clint is at the loss amount of sprouting and growth engineering, therefore Duo 30% than theoretical requirement) gathers healthy and strong eel grass hibernaculum as required, and the bed mud that gathers simultaneously some eel grass growth districts is preserved eel grass;

The 5th step: generally 4, May, temperature on average is higher than 15 ℃ of water that drain constantly in cement pit, even about 30 eel grass hibernaculums of plantation in every mould, the culture medium surface is just flooded to being filled in cement pit after plantation is completed in planting depth 2cm left and right;

The 6th step: according to the growing height timely adjustment water level of eel grass, and observe the eel grass growing state in time the reseeding of death, stop rising stage when eel grass grows into the height that needs.

The 7th step: estimate minute bark of a cork tree situation of eel grass, root system is growing state in substratum, and the firm degree of skinning, in the time of can also keeping complete shape not collapse after eel grass grassy marshland is taken mould apart, can throw in into needing to recover the lake region.

Two, experiment situation

It is as follows that carry out the experimental result of 45 day at Lake Erhai in May, 2010-June:

The results show eel grass has produced a large amount of plant division by sobole, has formed huge and intensive root system, can firmly combine with matrix, produces a desired effect.

Claims (1)

1. a rapid self-forming method of callisneria natans underwater meadow, is characterized in that comprising the following steps:

1. gather fertile lake mud, clay and biodegradable fiber;

2. press lake mud: clay: the volume ratio preparation eel grass culture medium of biodegradable fiber=40:40:20, and culture medium is inserted in long 60cm * wide 30cm * high 8cm Collapsible mould;

3. this mould is put into that illumination condition is good, the cement pit of regulating level;

4. gathering healthy and strong eel grass hibernaculum is seeded in culture medium;

5. according to the growing height timely adjustment cement pit median water level of eel grass, can Fast Growth, thus a minute bark of a cork tree is formed grassy marshland.