CN103875430A - Method for vegetative propagation seedling cultivation of Miscamthusszechuanesis Keng rhizomes in arid region - Google Patents
Method for vegetative propagation seedling cultivation of Miscamthusszechuanesis Keng rhizomes in arid region Download PDFInfo
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- CN103875430A CN103875430A CN201410137535.3A CN201410137535A CN103875430A CN 103875430 A CN103875430 A CN 103875430A CN 201410137535 A CN201410137535 A CN 201410137535A CN 103875430 A CN103875430 A CN 103875430A
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Abstract
The invention provides a method for vegetative propagation seedling cultivation of Miscamthusszechuanesis Keng rhizomes in an arid region. The method aims at satisfying the actual requirements for pioneer plants of degraded ecosystem vegetation recovery and reestablishment in the arid region. The method comprises the steps that fertile soil in a soil layer of 0-20 cm under shrubbery is collected; before the Miscamthusszechuanesis Keng rhizomes bud in spring, the healthy one-year rhizomes are selected, the portions, 4-5 cm away from each bud primordium, at the two sides are cut, and small sections of 8-10 cm of the rhizomes are obtained and horizontally planted to a seedbed at the intervals of 15 cm, wherein the planting depth ranges from 8 cm to 10 cm; in the process of seedling cultivation, the volume water content of the soil of the seedbed is kept 7%-18% and after 6 to 8 leaves appear, the rhizomes can be transplanted to the arid region from the seedbed. According to the method, a large number of viable Miscamthusszechuanesis Keng seedlings can be obtained, a pioneer species and the practical technology are provided for degraded ecosystem bare land and wasteland vegetation recovery in the arid region, the bare land or wasteland vegetation coverage is improved, and finally, the purposes of arid river valley shrub and herbaceous plant vegetation recovery and reestablishment are achieved.
Description
Technical field
The present invention relates to arid biogeographic zone degeneration and fill with careless ecosystem vegetation restoration and reconstruction technology and fill with careless seedling raising technology, be specifically related to arid biogeographic zone river group in Grain in Ear breeding, upgrade promotion technology and method, belong to ecological technique field.
Background technology
Arid biogeographic zone refers to belong to the area of arid climate, annual rainfall is area below 500mm, wherein, 0.03< aridity <0.20 is arid biogeographic zone, aridity > 0.20 is semiarid region, conventionally the said arid biogeographic zone general reference in this area arid and semi-arid lands.
On the earth, there is more than 1/3rd land areas to belong to arid, semiarid area.China's arid, semiarid zone area are wide, account for 1/2nd of territory total area.These arid biogeographic zone principal characters are: precipitation is few, and space-time distribution is uneven, variability is very large, and evaporation discharge can reach the more than 3.5 times of precipitation, causes weather and soil drought, and Moisture Availability is low is to have limited plant growth and existence.Arid biogeographic zone vegetation is taking Xerophyte and shrub as main.Arid area outstanding problem is that vegetation coverage is low at present, severe water and soil erosion, and dry climate and soil environment are restriction arid area vegetation restoration and reconstruction keys.
Under background of global climate change, local climate arid can cause arid, Semi-arid land ecosystems to face the more serious deterioration of the ecological environment and vegetation degeneration.Therefore, promote the crucial indigenous plant population of arid biogeographic zone seedling establishment, improve vegetation coverage, slowing down water and soil loss is its bare area or the most important approach of barren hill vegetation restoration and reconstruction.
River awns (
miscamthusszechuanesiskeng), grass family, awns belongs to, and perennial herb is mainly grown in cheuch and the both sides, riverbank of the Land of Typical Arid Areas such as south China dry-hot valley, dry valley, is locally to fill with careless plant community and build group.These species have laterally extending root-like stock, and are staggered to form network, and below earth's surface, 20 ~ 40cm soil layer forms stronger root-like stock layer, and strong stress resistance, has very strong soil conservation, water retention capacity.Therefore can be used for these regional side slopes, bare area and barren hill vegetation, for water and soil conservation and Ecological Restoration Project.
But because arid biogeographic zone weather is harsh and changeable, thermal and hydric environment is unstable, plant sexual propagation is difficult to meet to the requirement of seed germination opportunity and sprouting condition in natural ecosystems.But to the long-term adaptation of the barren environment of arid, river awns has sexual reproduction and asexual two kinds of Reproductive Strategies.The features such as we experimental studies have found that, in natural distribution district, river awns shows fairly obvious seeds abortion, and grain is little, vigor is low, thereby seed germination rate is less than 0.1%.Visible, the river awns of arid biogeographic zone produces seedling by seed sexual propagation and substantially cannot realize.But root-like stock breeding plays very important effect in river awns history of life; But owing to limited by drought environment, death of seedling rate is high, therefore river group in Grain in Ear expands limitedly, and the important value in arid biogeographic zone vegetation restoration and reconstruction fails fully to realize.
Therefore, need badly according to the actual conditions of current arid biogeographic zone ecosystem degradation, consideration of regional weather and soil water space-time Variation Features, grasp river awns growth, vegetative propagation feature and the reaction rule to water stress, select river awns root-like stock, carry out root-like stock transplanting at reasonable time, and in conjunction with and artificial regulatory soil moisture, promote root-like stock sprouting, growth of seedling and settle down, promote river group in Grain in Ear to upgrade by vegetative propagation means, final realization accelerated arid biogeographic zone bare area or degenerates and fill with careless vegetation restoration and reconstruction target.
Summary of the invention
For existing river awns in the sexual propagation difficulty of arid region, the problem that vegetative propagation survival rate of seedling is low, the invention provides a kind of arid biogeographic zone river awns root-like stock asexual multiplication seedling method, utilized the root-like stock of river awns cross direction profiles to develop into the vegetative propagation feature of new shoot.Following the breeding of river awns and growth under arid natural conditions, and on the basis of the key factor of correct identification restriction river group in Grain in Ear renewal, by transplanting root-like stock, carrying out river awns seedling breeds, and in conjunction with the spatial and temporal pattern of artificial adjustment soil moisture, promote that in drought environment, river group in Grain in Ear upgrades and expansion, thereby improve arid biogeographic zone bare area or degenerate and fill with careless vegetation coverage, slow down water and soil loss, containment ecosystem degradation.
A kind of arid biogeographic zone of the present invention river awns root-like stock asexual multiplication seedling method, realizes by the following technical solutions:
(1) gather under spinney fertile soil in 0 ~ 20cm soil horizon, total content of organic carbon is 16.3 ~ 18.5 gkg
-1, pH 5 ~ 6, unit weight 1.0 ~ 1.1 gcm
-3, full nitrogen 1.1 ~ 2.3 gkg
-1, available phosphorus 8.2 ~ 9.7 mgkg
-1, available potassium 70 ~ 91mgkg
-1, mix the seedbed that structure soil thickness is 25 ~ 35cm;
(2) stage before river awns root-like stock is sprouted, take the root-like stock of river awns concentration zones in natural environment;
(3) select diameter be 0.3 ~ 0.7cm, robust growth 1 age root-like stock, 4 ~ 5cm place, the former base of each bud both sides cuts off, and obtains and grows the root-like stock segment of 8 ~ 10cm, then plants in seedbed planting depth 8 ~ 10cm with the spacing level of 15cm;
(4) after plantation, on seedbed, cover the transparent plastic film of soil moisture conservation insulation, treat root-like stock sprouting, emerge, occur removing film after 2 ~ 3 pieces of blades, become outdoor seedbed, in the time that 6 ~ 8 pieces of blades occur, plant in arid biogeographic zone in extensible seedbed, maintains the soil volumetric water content in seedbed 7 ~ 18% between nursery stage.
Compared with prior art, this technology tool has the following advantages:
(1) compared with the awns seminal propagation of simple dependence river, the method can be brought up to emergence rate more than 99%, can effectively improve whole population updating ability;
(2) seedling that root-like stock and sprouting form is more extensive to the accommodation of ambient moisture, and the method can be used in the habitat of different in moisture condition;
(3) main material that the present invention uses, all from the natural distribution district of river awns, does not use auxiliary material and biochemical reagents etc. substantially, and therefore, material is collected convenient, and cost is low, profitable, and does not cause environmental pollution etc.;
(4) this method is succinct, and convenient operation is applicable to large area in arid biogeographic zone revegetation and adopts.
Therefore, can greatly improve the fertility of river awns by this method, and can directly apply to arid biogeographic zone bare area and barren hill vegetation restoration and reconstruction, can obtain considerable ecology, economic benefit.
Embodiment
Moisture is the key factor that arid biogeographic zone affects plant propagation and growth, therefore the present invention is at representational arid biogeographic zone---Dry River Valley of Minjiang's Upper Course center lot Mao County, under semiarid (soil moisture content is 17.5-12.1%) in this region and arid (soil moisture content is 7.2%) environmental condition, carry out the rhizomatic asexual multiplication seedling of river awns, and transplanting after growing seedlings successfully.
Embodiment 1
(1) prepare in grow seedlings soil and seedbed: select 0 ~ 20cm soil under spinney, total content of organic carbon is 17.22 gkg
-1, pH5.45, unit weight 1.01gcm
-3, full nitrogen 1.64gkg
-1, C/N ratio 10.6, available phosphorus 9.19mgkg
-1, available potassium 78.25mgkg
-1, after soil is mixed, the outdoor seedbed that to build area 1.5m*1.5m, soil thickness be 35cm in field, parallelly does 3.
(2) root-like stock obtains and preserves: in spring in 2012 (at the beginning of 4 months), before river awns root-like stock is not sprouted, in river awns areal concentration, take root-like stock under field conditions (factors), imbed at normal temperatures immediately in wet sand and preserve.
(3) root-like stock plantation: select diameter 0.3 ~ 0.5cm, robust growth 1 age root-like stock, manually cut off, and transplant; First, 4 ~ 5cm place, the former base of each bud both sides cuts off, and obtains the root-like stock segment of long 8 ~ 10cm, then, plants in seedbed the degree of depth 8 ~ 10cm with the spacing level of 15cm.
(4) water management: after root-like stock plantation, moisture is natural precipitation condition, this region annual rainfall is 479 mm, soil volumetric water content is 17.5%, covers the transparent plastic film of soil moisture conservation insulation, and do simple rack on seedbed, wait to emerge, and occur, after 2 ~ 3 pieces of blades, opening plastic film, become outdoor seedbed; While growing 6 ~ 8 pieces of blades, seedling is shifted out to seedbed, test testing ground area 700m as pionner for the section barren hill revegetation of arid valley of Minjiang River Mao County
2under natural conditions, soil volumetric water content is 12.8-15.3%, seedling percent reaches 99.1%, after 1 year, experimental field river awns cover degree reaches 100%, plant height 88.72 ± 13.04cm, 26.94 ± 8.00 of branch amounts, ground biomass is 19.88 ± 2.50g, underground biomass 11.51 ± 2.93g, has effectively increased this region barren hill vegetation coverage, and water and soil conservation has been played a good role.
Embodiment 2
(1) prepare in grow seedlings soil and seedbed: select 0 ~ 20cm soil under spinney, total content of organic carbon is 16.3gkg-1, pH 5, unit weight 1.1gcm
-3, full nitrogen 2.3gkg
-1, C/N ratio 7.1, available phosphorus 8.2mgkg
-1, available potassium 91mgkg
-1, after soil is mixed, the outdoor seedbed that is 30cm at field structure area 1.5m*1.5m, soil thickness, parallel 3.
(2) root-like stock obtains and preserves: in spring in 2012 (at the beginning of 4 months), before river awns root-like stock is not sprouted, in river awns areal concentration, take root-like stock under field conditions (factors), imbed at normal temperatures immediately in wet sand and preserve.
(3) root-like stock plantation: select diameter 0.4 ~ 0.7cm, robust growth 1 age root-like stock, manually cut off, and transplant; First, 4 ~ 5cm place, the former base of each bud both sides cuts off, and obtains the root-like stock segment of long 8 ~ 10cm, then, plants in seedbed the degree of depth 8 ~ 10cm with the spacing level of 15cm.
(4) water management: after root-like stock plantation, top, seedbed is built rain-proof shed, and watering and making soil volumetric water content is 7.2% at whole nursery stage, and all the other steps are identical with embodiment 1.Seedling replanting under the barren hill of arid valley of Minjiang River Mao County section and bare area natural conditions experimental field, area 400m
2its soil moisture content is 12.8-15.3%, survival rate reaches 99.7%, after 1 year, experimental field river awns cover degree reaches 100%, plant height 88.56 ± 10.21cm, 23.94 ± 8.99 of branch amounts, ground biomass 25.81 ± 9.64g, underground biomass 15.84 ± 8.24g, has effectively increased this region barren hill vegetation coverage, and water and soil conservation has been played a good role.
Embodiment 3
(1) prepare in grow seedlings soil and seedbed: select 0 ~ 20cm soil under spinney, total content of organic carbon is 18.5gkg-1, pH6, unit weight 1.0gcm
-3, full nitrogen 1.1gkg
-1, C/N ratio 16.7, available phosphorus 9.7mgkg
-1, available potassium 70 mgkg
-1, after soil is mixed, build area 1.5m*1.5m, the outdoor seedbed that soil thickness is 25cm, parallel 3 in field.
(2) root-like stock obtains and preserves: in spring in 2012 (at the beginning of 4 months), before river awns root-like stock is not sprouted, in river awns areal concentration, take root-like stock under field conditions (factors), imbed at normal temperatures immediately in wet sand and preserve.
(3) root-like stock plantation: select diameter 0.3 ~ 0.7cm, robust growth 1 age root-like stock, manually cut off, and transplant; First, 4 ~ 5cm place, the former base of each bud both sides cuts off, and obtains the root-like stock segment of long 8 ~ 10cm, then, plants in seedbed the degree of depth 8 ~ 10cm with the spacing level of 15cm.
(4) water management: after root-like stock plantation, top, seedbed is built rain-proof shed, and watering and making soil volumetric water content is 12.1% at whole nursery stage, and all the other steps are identical with embodiment 1.Seedling replanting under the barren hill of arid valley of Minjiang River Mao County section and bare area natural conditions experimental field, area 400m
2its soil moisture content is 12.8-15.3%, survival rate reaches 99.2%, after 1 year, experimental field river awns cover degree reaches 100%, plant height 73.03 ± 12.74cm, 20.08 ± 7.92 of branch amounts, ground biomass 22.26 ± 9.21g, underground biomass 13.01 ± 7.98g, has effectively increased this region barren hill vegetation coverage, and water and soil conservation has been played a good role.
Claims (1)
1. an arid biogeographic zone river awns root-like stock asexual multiplication seedling method, is characterized in that, comprises the steps:
(1) gather under spinney fertile soil in 0 ~ 20cm soil horizon, total content of organic carbon is 16.3 ~ 18.5 gkg
-1, pH 5 ~ 6, unit weight 1.0 ~ 1.1 gcm
-3, full nitrogen 1.1 ~ 2.3 gkg
-1, available phosphorus 8.2 ~ 9.7 mgkg
-1, available potassium 70 ~ 91mgkg
-1, mix the seedbed that structure soil thickness is 25 ~ 35cm;
(2) stage before river awns root-like stock is sprouted, take the root-like stock of river awns concentration zones in natural environment;
(3) select diameter be 0.3 ~ 0.7cm, robust growth 1 age root-like stock, 4 ~ 5cm place, the former base of each bud both sides cuts off, and obtains and grows the root-like stock segment of 8 ~ 10cm, then plants in seedbed planting depth 8 ~ 10cm with the spacing level of 15cm;
(4) after plantation, on seedbed, cover the transparent plastic film of soil moisture conservation insulation, treat root-like stock sprouting, emerge, occur removing film after 2 ~ 3 pieces of blades, become outdoor seedbed, in the time that 6 ~ 8 pieces of blades occur, plant in arid biogeographic zone in extensible seedbed, maintains the soil volumetric water content in seedbed 7 ~ 18% between nursery stage.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105746144A (en) * | 2016-03-12 | 2016-07-13 | 中国科学院新疆生态与地理研究所 | Side slope afforestation method for water diversion open ditch in arid area |
| CN109729900A (en) * | 2019-02-21 | 2019-05-10 | 中国林业科学研究院森林生态环境与保护研究所 | A kind of Arid river valleys in Western Sichuan method of vegetation restoration and reconstruction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105746144A (en) * | 2016-03-12 | 2016-07-13 | 中国科学院新疆生态与地理研究所 | Side slope afforestation method for water diversion open ditch in arid area |
| CN105746144B (en) * | 2016-03-12 | 2018-07-20 | 中国科学院新疆生态与地理研究所 | A kind of arid biogeographic zone open diversion canal method for greening side slope |
| CN109729900A (en) * | 2019-02-21 | 2019-05-10 | 中国林业科学研究院森林生态环境与保护研究所 | A kind of Arid river valleys in Western Sichuan method of vegetation restoration and reconstruction |
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