Water depth optimization and rapid recovery method of Scirpus nipponicu wetland under saline-alkali stress

An optimization method, the technology of scutellaria, applied in the direction of botanical equipment and methods, root crop cultivation, soilless cultivation, etc., can solve the problems of restricting the restoration effect of degraded wetlands, and achieve the advantages of rapid colonization and construction, accumulation of promotion, good effect

Active Publication Date: 2020-02-07
SOUTHWEST UNIVERSITY
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Problems solved by technology

However, at present, when restoring wetland vegetation, the impact of burial depth and water level fluctuations on the aboveground biomass and bulb biomass are mainly considered. Few people pay attention to the optimum water level for the growth of S. triangularis at different salinity levels. , which to a certain extent restricts the restoration effect of degraded wetlands

Method used

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  • Water depth optimization and rapid recovery method of Scirpus nipponicu wetland under saline-alkali stress

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The method for optimizing the water depth of the Sanjiang grass wetland under saline-alkali stress of the present invention comprises the following steps:

[0027] (1) Excavate the bulbs of the Sanjiang grass in the distribution area of ​​Eantoupao Sanjiang in the west of Jilin Province, store them in the dark and moist, and obtain the bulbs of the Sanjiang grass to be planted;

[0028] (2) Select healthy and complete bulbs with consistent growth, wash them, place them in a seedling pot, water every day to keep the water depth of 0-2cm in the pot, grow seedlings in the greenhouse, and obtain 2-5cm high Siamia sativa seedlings;

[0029] (3) sow the Sanjiang grass seedlings in the cultivation pot, the cultivation pot is 13cm high, 14cm in inner diameter, and filled with 10cm high water-washed sand;

[0030] The burial depth of the Sanjiangsi grass seedlings is 2–3 cm, and 5 bulbs are planted in each cultivation pot;

[0031] Put the culture bowl into the large water tank...

Embodiment 2

[0036]This example specifically illustrates the experimental results of the water depth optimization method in Example 1 and the rapid restoration method of the Sanjiang sage grass wetland.

[0037] The size of aboveground biomass represents the ability of plants to obtain resources such as light and oxygen. Underground biomass can reflect the ability of plants to absorb water and nutrients. The water depth where aboveground biomass, underground biomass and bulb biomass were relatively large was regarded as the optimum water level for the growth of S. triangularis at various salinity concentrations.

[0038] figure 1 The above-ground biomass, underground biomass and biomass of newly formed bulbs of S. tricera after being treated by the method described in Experimental Example 1 are listed. The different lowercase letters in the figure indicate the difference in aboveground biomass, belowground biomass and bulb biomass of S. triangularis among different water depths (cm) under...

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Abstract

The invention relates to a water depth optimization and rapid recovery method of a Scirpus nipponicu wetland under saline-alkali stress. The method includes collecting Scirpus nipponicu corms for seedling raising, sowing the seedlings in different culture bowls, placing the seedlings in a water tank to build a water depth gradient, and adding a Hoagland semi-nutrient solution with different concentrations of NaHCO3+NaCl for culture; and after the culture, measuring the aboveground, underground and corm biomass of the Scirpus nipponicu, and analyzing the optimum water depth for the growth of the Scirpus nipponicu under different saline-alkali concentrations. The results show that when the concentration of saline-alkali is 0, the water depth is adjusted to 0cm; when the saline-alkali concentration is 2.5 g kg-1, the water depth is adjusted to 15-30cm; when the saline-alkali concentration is 5.00 g kg-1, the water depth is adjusted to 15cm; and when the saline-alkali concentration is larger than 10.0 g kg-1, the Scirpus nipponicu cannot survive. By studying the influence of water depth on the growth of the Scirpus nipponicu under different saline-alkali stress degrees, the optimal water depth for the growth of the Scirpus nipponicu under different saline-alkali concentrations is determined, the biomass accumulation of the Scirpus nipponicu is effectively improved, and the rapid colonization and recovery of Scirpus nipponicu population are facilitated.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a method for water depth optimization and rapid restoration of Sanjiang sage wetland under saline-alkali stress. Background technique [0002] Scirpus nipponicus is a perennial herbaceous plant of Cyperaceae Cyperaceae. It is the dominant species in wetland emergent plant communities. It mostly grows in paddy fields and inland saline-alkali wetlands. Northeast China is its main distribution area. Sanjiangsi can grow and reproduce rapidly through bulbs, and its underground bulbs are also an important food source for herbivorous waterbirds such as the globally endangered white crane (Grusleucogeranus). Sanjiang Wetland is not only a spawning ground and habitat for many animals, but also a key primary producer of salt marsh wetland, which is crucial to the stability of the original ecosystem function and structure. [0003] However, due to the impact of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G31/00A01G22/25
CPCA01G31/00A01G22/25
Inventor 汤旭光刘莹丁智
Owner SOUTHWEST UNIVERSITY
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