CN114271142B - Planting method for improving low-temperature resistance of mangrove plant Kandelia candel seedlings - Google Patents
Planting method for improving low-temperature resistance of mangrove plant Kandelia candel seedlings Download PDFInfo
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Abstract
The invention discloses a planting method for improving the low-temperature resistance of Kandelia candel seedlings of mangrove plants; the invention adopts the technical means that before cold current comes (the lowest temperature is lower than the freezing point), the seedlings of the Kandelia candel are submerged by using the heat insulating property of water, after cold tide passes, water is added, and stems and leaves of the Kandelia candel are exposed, so that the seedlings of the Kandelia candel are prevented from being frozen at low temperature, the seedlings of the Kandelia candel can stably pass through in cold winter, the survival rate of the Kandelia candel in high-latitude areas (such as the Shanghai Yangtze river mouth wetland) is improved, and technical support is provided for successful implementation of the northern migration of the Kandelia candel.
Description
Technical Field
The invention belongs to the technical field of mangrove plant planting, and particularly relates to a planting method for improving low-temperature resistance of mangrove plant Kandelia candel seedlings.
Background
Mangrove forest is a tidal flat wetland woody biocenosis composed of evergreen shrubs which grow on tropical and subtropical low-energy coast intertidal zones and take mangrove plants as main bodies, and is mainly distributed in the intertidal zones between 0 and 25 degrees of north and south latitude of the earth. They grow on the shoals of the transition zone between land and sea, are special ecosystems of land over sea, and are submerged by periodic tidal water. Mangrove forest has obvious effects in disaster prevention and reduction, developed root systems and dense mangrove forest can cut sea waves and reduce scouring and erosion of sea current storm surge to coast, so the mangrove forest is also called as first natural 'coast soil defense'. The mangrove forest is one of the highest ecosystems in the world, has rich biodiversity, has the total productivity second to coral reefs, and provides important habitats and food for coastal animals; can promote siltation, enlarge the beach, protect the dyke and prevent the wave, relieve the water pollution, purify the water quality; meanwhile, researches find that mangrove forest can effectively prevent and restore the ecological system invaded by spartina alterniflora and increase the diversity of organisms.
The Shanghai is located in Yangtze river and Qiantangjiang river, has large-area estuary wetland, is the most economically developed area in China, but the resource of the Shanghai shoal wetland is not heavy due to the transitional reclamation of the tidal flat wetland, the reduction of the amount of silt in the Yangtze river and Qiantangjiang river, the occupation of newly-built large-scale engineering and the like; in addition, in order to promote siltation and fix beaches in the early stage, a large amount of spartina alterniflora is invaded, so that the ecological system is seriously damaged, and the coastal mudflat of Shanghai and Jianghe and Zhejiang Shanghai are urgently needed to be protected and repaired with greater strength.
Since 2017, the Shanghai region suffers from a plurality of rare attacks of strong heat zone storms every year, and the storm brings huge danger and loss to the regions, particularly coastal dams. With the global warming, the areas of Shanghai and Zhejiang provinces may be attacked by more and larger strong heat storms, and the strengthening of the construction of natural beach protection forests is the first line of defense against sea wave erosion and is also one of the very effective means.
However, low temperature is the most limiting condition for mangrove plant survival, since most mangrove species grow in the coastal intertidal zones of tropical and subtropical regions, and thus are extremely sensitive to low temperature, temperature fluctuations above 10 ℃ in a short time are sufficient to destroy mangrove plant growth, and freezing temperatures of several hours will kill most mangrove forest species even more. The temperature in winter limits the survival of the mangrove plants, so that the mangrove plants are difficult to safely pass the winter in high latitude areas, such as the beaches of the Yangtze river mouths of Shanghai.
Kandelia candel (ii) (Kandelia obovata) The mangrove is a mangrove plant which is common in mangrove and has the widest distribution, the northmost natural distribution area is Fujian fuding (N27 degree 20 '), and the artificial cultivation is carried out to the Taizhou of Zhejiang (N28 degree 50'). Kandelia candel is also the hardest species in mangrove plants, and scientists research shows that after low-temperature treatment for 1h, the semilethal temperature is-9.3 ℃, but Kandelia candel seedlings, especially the plants with the seedling age of less than 3 years, can not resist the continuous low temperature of more than 3 to 5 days from-5 ℃ to-10 ℃. The cold tide low temperature of 2008 and 2020 brings huge loss to mangrove plant Kandelia candel planted in high latitude areas, especially in Yangtze river estuary areas.
Therefore, how to improve the cultivation and planting of mangrove plants in the shoal wetland at the estuary of the Yangtze river and in the most economically developed region of China is not slow enough, and people need to be prevented from getting caught before raining, and the mangrove plants are protected.
Disclosure of Invention
The invention aims to provide a planting method for improving the low-temperature resistance of the seedlings of the Kandelia candel of a mangrove plant; the method can effectively protect the safe overwintering of the Kandelia candel seedlings in the beach wetland in the estuary region of the Yangtze river and avoid the damage caused by cold tide and low temperature.
In order to achieve the purpose, the invention adopts the following technical scheme:
a planting method for improving the low temperature resistance of the seedlings of the Kandelia candel of the mangrove plant utilizes the heat preservation effect of water, water is poured before the low temperature of a cold tide comes, namely the lowest temperature is reduced to be below 0 ℃, so that the seedlings of the Kandelia candel plant are submerged in the water, water is discharged after the cold tide passes, the land is exposed, stems and leaves of the Kandelia candel plant are exposed, the breathing of roots and stems of the plant is ensured, the low temperature resistance of the seedlings of the Kandelia candel plant is improved, and the survival rate of the Kandelia candel plant is further improved.
In the invention, the water level of the seedling submerging the Kandelia candel is determined according to the difference of air temperature, and the method specifically comprises the following steps: the lowest temperature is between 0 ℃ and-5 ℃, and the water level is 4 to 8cm higher than that of a Kandelia candel plant; the lowest temperature is-5 to-10 ℃, and the water level is 10 to 15cm higher than that of the Kandelia candel plants.
The invention provides a planting method for improving the low temperature resistance of a mangrove plant Kandelia candel seedling, which comprises the following specific steps:
1) Planning the planted land into a plurality of plots before planting the hypocotyls of the Kandelia candel; can be 15m × 20m, 20m × 30m,30m × 40m,40m × 50m, etc., and the block size is preferably not more than 2000m 2 Because it is easy to control the water level height of each land;
2) Carrying out leveling treatment on the planned land to ensure that the level difference of each land block is not more than 10cm;
3) Building and compacting ridges around the planting plots, wherein the heights of the ridges are more than 1m higher than the planting ground; geotextile or lawn can be adopted at the inner side of the ridge to ensure the firmness of the ridge;
4) Planting the seedling of the hypocotyl of the Kandelia candel in the leveled land; the spacing between the hypocotyl seedlings is 20cm multiplied by 30cm or 30cm multiplied by 30cm;
5) After the planting of the hypocotyls of the Kandelia candel is finished, performing daily field management and maintenance regularly, and ensuring that water is irrigated at least once every week in the period of 6-9 months of each year, namely the rapid growth period of the Kandelia candel seedlings, wherein the water level does not exceed half of the height of a plant stem every time, and meanwhile, the combination of dry and wet is noticed; if the rain is excessive, timely drainage is needed, so that the Kandelia candel seedlings are not submerged under the water for a long time;
6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months each year, some compound fertilizers are applied, so that the growth of the Kandelia candel and the lignification degree of the plants are improved, and the tolerance of the plants to low temperature is increased;
7) In winter, the weather forecast is closely concerned, and the water level height in the Kandelia candel land is adjusted according to the winter temperature:
In the invention, in the step 1), mangrove plant Kandelia candel seedlings are planted in Yangtze river basin areas.
In the invention, in the step 4), hypocotyl seedlings are preferably selected from Taizhou, wenzhou and the like in Zhejiang, and then from Quanzhou, zhangzhou and the like in Fujian, and the selection of the autumn eggplant hypocotyls in Guangdong is not recommended. The Kandelia chekiangensis is an artificial plantation introduced from Fujian and the like, has certain cold resistance after 20 years of introduction and domestication, is more favorable for successful introduction in high-latitude Yangtze river mouth wetlands, and improves the survival rate; the mature periods of the embryonic axis of the Kandelia candel are different in different areas, and the Kandelia candel is planted as soon as possible after the embryonic axis seedlings are obtained, for example: the embryo axis of the quanzhou in Fujian is mature about in the middle of 4 months to 5 months, and the planting period is about before 5 months; the embryonic axis of Taizhou in Zhejiang is mature from 5 to 6 months, and the planting period is finished before 6 months.
In the invention, in the step 7), when the lowest temperature is between-5 to 0 ℃, the winter cold flow belongs to the Yangtze river basin; when the lowest temperature is between minus 10 ℃ and minus 5 ℃, the natural air belongs to extremely cold weather in the Yangtze river basin in winter.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a simple and effective planting management technology, solves the problem that mangrove plants in the Yangtze river basin are difficult to overwinter through a 'watering' heat preservation method, and provides possibility for planting mangroves on the coast and the shoals in Shanghai and Jiangzhe Shanghai.
Detailed Description
The technical solution of the present invention is described clearly and completely by the following specific embodiments, and the described embodiments are only a part of the embodiments of the present invention, but not all of them. The core idea of the invention is that the method is also practical for other mangrove plants like the tung tree by taking the 'irrigation' heat preservation measure for the Kandelia seedlings in the cold winter. So long as they are within the scope of the present invention.
Example 1 case
(1) Before planting the hypocotyl of the Kandelia candel, planning the planted land to be 20m multiplied by 30m, so that the water level height of the land is easily controlled;
(2) Leveling the planned land to ensure that the level difference inside the land block does not exceed 10cm;
(3) Building ridges around the planting plots, compacting the ridges, wherein the ridges are required to be more than 1m higher than the planting ground, and geotextile or lawn can be adopted on the inner sides of the ridges to ensure the firmness of the ridges, so that the water level of the plots can reach more than 80cm in a cold period;
(4) Planting the seedling of the hypocotyl of the Kandelia candel in the leveled land according to the distance of every 20cm multiplied by 30cm;
the hypocotyl seedlings are selected from about 1 ten thousand healthy Zhejiang Wenzhou seedlings, and Zhejiang Kandelia candel is an artificial plantation introduced from Fujian Xiamen in 2005, and has certain cold resistance after introduction and domestication for over a decade. The growing period of the embryonic axis of Wenzhou in Zhejiang is about 5 to 6 last ten days in 2019, and the growing period is completed before 15 days of 6 months;
(5) After the completion of the planting of the embryonic axis of the kandelia candel, the routine field management and maintenance are required to be carried out regularly, particularly in the period of 6-9 months per year, the period is the rapid growth period of the kandelia candel seedlings, the water is irrigated at least once every week, the water level does not exceed half of the plant stem height every time, and meanwhile, the combination of dry and wet is paid attention; if the rain is excessive, timely drainage is needed, so that the Kandelia candel seedlings are not submerged under the water for a long time;
(6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months each year, the potassium sulfate compound fertilizer is applied, so that the lignification degree of the Kandelia candel plants can be improved, and the low-temperature tolerance of the Kandelia candel plants can be increased;
(7) During 12-01 months in winter, closely paying attention to weather forecast, and adjusting the height of the water level in the Kandelia candel land according to the winter temperature;
in 29-month evening of 12 and 29 in 2020, the minimum temperature of the Shanghai is reduced to-4 ℃, irrigation is started from 28 days in 12 and 28 months according to the requirement of irrigation heat preservation, the water level in the land parcel is submerged for 4-8cm above the Kandelia candel plant in 29 days, and the water depth is about 50 cm;
the temperature rises to above 0 ℃ in 2021 year, 1 month and 2 days, the minimum temperature reaches 6 ℃ in 1 month and 3 days, the bare land is drained quickly, and the rhizome of the Kandelia candel is ensured to breathe.
In 2021 year, 1 month and 6 days, the temperature is reduced to below 0 ℃ again, the lowest temperature is-6 ℃ in 1 month and 7 days, water is poured again to submerge the kandelia candela plants, the water depth exceeds 60cm and exceeds more than 10cm (about 10 to 15cm) of the plants, the water surface of the whole land can be greatly frozen, and the thickness of an ice layer reaches 4-6cm;
the cold flow lasts below 0 ℃ for 6 days, the lowest temperature returns to above 0 ℃ in 12 days in 1 month, the ice layer begins to melt, the water begins to drain in 13 days in 1 month to 14 days of bare land, and the water flooding time reaches 7 days.
(8) After cold flows in winter, care is taken to maintain and manage the Kandelia candel plants. The autumn eggplant with partial fallen leaves can germinate again after spring, and in order to ensure the accuracy of the survival rate statistics, the survival rate statistics is carried out in the middle 5 th of the month.
Example group 2 case
(1) Before planting the hypocotyl of Kandelia candel, the soil is planned to 20m × 30m, so that the water level of the plot can be easily controlled.
(2) And leveling the planned land to ensure that the level difference inside the land block does not exceed 10cm.
(3) The ridges around the planting plots are built, must be compacted and are required to be more than 1m higher than the planting ground, geotextile or planting lawns can be adopted on the inner sides of the ridges to ensure the firmness of the ridges, so that the water level of the plots can reach more than 80cm in cold periods.
(4) Planting the seedling of the hypocotyl of the Kandelia candel in the flattened land according to the distance of 20cm multiplied by 30 cm.
The method is characterized in that about 1 ten thousand healthy spring plants are selected from the spring seedlings in Fujian, the planting period of the spring seedlings in Fujian is about 4-5 ten days in 2019, and the planting period is completed before 5 months and 30 days.
(5) After the planting of the hypocotyls of the Kandelia candel is finished, daily field management and maintenance are required to be carried out regularly, particularly in the period of 6-9 months per year, the fast growth period of Kandelia candel seedlings is provided, water is irrigated at least once every week, the water level does not exceed half of the height of plant stems every time, and meanwhile, the combination of dry and wet is paid attention to; if it rains too much, timely drainage is needed to ensure that the Kandelia candel seedlings are not submerged under water for a long time.
(6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months every year, the potassium sulfate compound fertilizer is applied, so that the lignification degree of the Kandelia candel plants can be improved, and the tolerance of the plants to low temperature is increased.
(7) During the 12-01 months of the winter, the weather forecast is closely focused, and the water level height in the Kandelia candel land is adjusted according to the winter temperature.
In the evening of 12 and 29 months in 2020, the lowest temperature in the Shanghai is reduced to-4 ℃, irrigation is started from 28 days in 12 and 28 months according to the requirement of irrigation heat preservation, the height of the water level in the land is submerged in the Kandelia candel plants for 4 to 8cm in 29 days, and the water depth is about 60cm because the Fujian hypocotyl seedling plants are higher than the Zhejiang hypocotyl seedlings.
The temperature rises to above 0 ℃ in 2021, 1 and 2 days, the minimum temperature reaches 6 ℃ in 1 and 3 days, and the bare land is drained quickly, so that the rhizome of the Kandelia candel plant can breathe.
And in 2021, 6 days, reducing the temperature to below 0 ℃ again, in 1 month and 7 days, irrigating water again to submerge the Kandelia candel plants at the lowest temperature of-6 ℃, wherein the water depth exceeds 70cm and exceeds 10cm (about 10 to 15cm) of the Kandelia candel plants, the water surface of the whole land is greatly frozen, and the thickness of an ice layer reaches 4-6cm.
The cold flow lasts below 0 ℃ for 6 days, the lowest temperature returns to above 0 ℃ in 12 days in 1 month, the ice layer begins to melt, the water begins to drain in 13 days in 1 month to 14 days of bare land, and the water flooding time reaches 7 days.
(8) After cold flows in winter, care is taken to maintain and manage the Kandelia candel plants. The autumn eggplant with partial fallen leaves can germinate again after spring, and in order to ensure the accuracy of the survival rate statistics, the survival rate statistics is carried out in the middle 5 th of the month.
Control group 1 case
(1) Before planting the hypocotyl of the Kandelia candel, the soil land is planned to be 20m × 30m, so that the water level height of the land is easily controlled.
(2) And leveling the planned land to ensure that the level difference inside the land block does not exceed 10cm.
(3) The ridges around the planting plots are built, must be compacted and are required to be more than 1m higher than the planting ground, geotextile or planting lawns can be adopted on the inner sides of the ridges to ensure the firmness of the ridges, so that the water level of the plots can reach more than 80cm in cold periods.
(4) Planting the seedling of the hypocotyl of the Kandelia candel in the flattened land according to the distance of 20cm multiplied by 25 cm.
1 million healthy Wenzhou Zhejiang are selected, the planting period is about 2019 from 5 middle ten days to 6 upper ten days of the month, and the planting period is completed before 6 months and 15 days.
(5) After the completion of the planting of the embryonic axis of the kandelia candel, the routine field management and maintenance are required to be carried out regularly, particularly in the period of 6-9 months per year, the period is the rapid growth period of the kandelia candel seedlings, the water is irrigated at least once every week, the water level does not exceed half of the plant stem height every time, and meanwhile, the combination of dry and wet is paid attention; if it rains too much, timely drainage is needed to ensure that the Kandelia candel seedlings are not submerged under water for a long time.
(6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months every year, the potassium sulfate compound fertilizer is applied, so that the lignification degree of the Kandelia candel plants can be improved, and the tolerance of the plants to low temperature is increased.
(7) During the 12-01 months of the winter, the weather forecast is closely focused, and the water level height in the Kandelia candel land is adjusted according to the winter temperature.
In the evening of 12 and 29 months in 2020, the minimum temperature in the Shanghai is reduced to-4 ℃, irrigation is started from 28 days in 12 and 28 months according to the irrigation heat preservation requirement, the height of the water level in the land parcel reaches 2/3 of the height of the Kandelia candel plant in 29 days, and the depth of the water depth is about 30 cm.
The temperature rises to above 0 ℃ in 2021, 1 and 2 days, the minimum temperature reaches 6 ℃ in 1 and 3 days, and the bare land is drained quickly, so that the rhizome of the Kandelia candel plant can breathe.
And in 6 days 1 and 6 months in 2021, the temperature is reduced to below 0 ℃ again, in 7 days 1 and 7 days, the lowest temperature is minus 6 ℃, water is irrigated again, the height of the water level reaches 2/3 of the height of the Kandelia candel plant, the depth of the water is about 30cm, a large amount of ice is formed on the water surface of the whole land, and the thickness of an ice layer reaches 4-6cm.
The cold flow lasts below 0 ℃ for 6 days, the lowest temperature returns to above 0 ℃ in 12 days in 1 month, the ice layer begins to melt, the water begins to drain in 13 days in 1 month to 14 days of bare land, and the water flooding time reaches 7 days.
(8) After cold flows in winter, care is taken to maintain and manage the Kandelia candel plants. The autumn eggplant with partial fallen leaves can germinate again after spring, and in order to ensure the accuracy of the survival rate statistics, the survival rate statistics is carried out in the middle 5 th of the month.
Control group 2 cases
(1) Before planting the hypocotyl of the Kandelia candel, the soil land is planned to be 20m × 30m, so that the water level height of the land is easily controlled.
(2) And carrying out leveling treatment on the planned land to ensure that the difference of the internal levels of the land blocks does not exceed 10cm.
(3) The ridges around the planting plots are constructed and must be compacted, the height of the ridges is required to be more than 1m higher than the planting ground, geotechnical cloth or a planting lawn can be adopted on the inner sides of the ridges to ensure the firmness of the ridges, and therefore the water level of the plots can reach more than 80cm in a cold period.
(4) Planting the seedling of the hypocotyl of the Kandelia candel in the leveled land according to the distance of every 20cm multiplied by 30 cm.
Selecting 5 thousand healthy embryonic axis of Wenzhou in Zhejiang and Quanzhou in Fujian, wherein the planting period is about 4 to 6 middle ten days in 2019, and the planting period is completed before 6 months and 15 days.
(5) After the planting of the hypocotyls of the Kandelia candel is finished, daily field management and maintenance are required to be carried out regularly, particularly in the period of 6-9 months per year, the fast growth period of Kandelia candel seedlings is provided, water is irrigated at least once every week, the water level does not exceed half of the height of plant stems every time, and meanwhile, the combination of dry and wet is paid attention to; if it rains too much, drainage is needed in time to ensure that the Kandelia candel seedlings are not submerged under water for a long time.
(6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months every year, the potassium sulfate compound fertilizer is applied, so that the lignification degree of the Kandelia candel plants can be improved, and the tolerance of the plants to low temperature is increased.
(7) During 12-01 months in winter, the weather forecast is closely focused, and the water level height in the Kandelia candel land is adjusted according to the winter temperature.
In the evening of 12 and 29 months in 2020, the minimum temperature in the Shanghai is reduced to-4 ℃, irrigation is started from 28 days in 12 and 28 months according to the requirement of irrigation heat preservation, the height of the water level in the land parcel reaches 1/4 of the height of the Kandelia candel plant in 29 days, and the depth of the water depth is about 15cm.
The temperature rises to above 0 ℃ in 2021, 1 and 2 days, the minimum temperature reaches 6 ℃ in 1 and 3 days, and the bare land is drained quickly, so that the rhizome of the Kandelia candel plant can breathe.
And in 6 days 1 and 6 months in 2021, the temperature is reduced to below 0 ℃ again, in 7 days 1 and 7 days, the lowest temperature is minus 6 ℃, water is irrigated again, the height of the water level reaches 1/4 of the height of the Kandelia candel plant, the depth of the water is over 15cm, the water level of the whole land can be greatly frozen, and the thickness of the ice layer reaches 4-6cm.
The cold flow lasts below 0 ℃ for 6 days, the lowest temperature returns to above 0 ℃ in 12 days in 1 month, the ice layer begins to melt, the water begins to drain in 13 days in 1 month to 14 days of bare land, and the water flooding time reaches 7 days.
(8) After cold flows in winter, care is taken to maintain and manage the Kandelia candel plants. Since part of fallen leaves of Kandelia candel germinate again after spring, in order to ensure the accuracy of the survival rate statistics, the survival rate statistics is performed in the middle of 5 months.
The results of the experimental and control cases are shown in Table 1:
TABLE 1
Obviously, the invention adopts the technical method that when the temperature is lower than 0 ℃, the Kandelia candel plants are submerged by water, so that the safe overwintering of the Kandelia candel seedlings in the beach wetland in the estuary area of the Yangtze river can be simply and effectively protected, and the damage caused by cold tide and low temperature can be avoided.
Claims (2)
1. A planting method for improving the low temperature resistance of the seedlings of the Kandelia candel of mangrove plants is characterized in that by utilizing the heat preservation effect of water,
before the low temperature of the cold tide comes, namely before the lowest temperature is reduced to be below 0 ℃, water is poured to submerge the seedlings of the Kandelia candel plants, after the cold tide passes, water is discharged to expose the land and expose stems and leaves of the Kandelia candel plants, so that the breathing of the roots and stems of the Kandelia candel plants is ensured, the low temperature resistance of the Kandelia candel seedlings of the mangrove plants is improved, and the survival rate of the Kandelia candel seedlings is improved;
the water level for submerging the Kandelia candel plant seedlings is determined according to the difference of air temperature, and the water level is as follows: the lowest temperature is between 0 ℃ and-5 ℃, and the water level is 4 to 8cm higher than that of a Kandelia candel plant; the lowest temperature is between minus 5 ℃ and minus 10 ℃, and the water level is higher than that of Kandelia candel plants by 10 to 15cm;
the method comprises the following specific steps:
1) Planning the planted land into a plurality of plots before planting the hypocotyls of the Kandelia candel;
2) Carrying out leveling treatment on the planned land to ensure that the level difference of each land block is not more than 10cm;
3) Building and compacting ridges around the planting plots, wherein the heights of the ridges are more than 1m higher than the planting ground;
4) Planting the seedling of the hypocotyl of the Kandelia candel in the leveled land;
5) After the planting of the hypocotyls of the Kandelia candel is finished, performing daily field management and maintenance regularly, and ensuring that water is irrigated at least once every week in the period of 6-9 months of each year, namely the rapid growth period of the Kandelia candel seedlings, wherein the water level does not exceed half of the height of a plant stem every time, and meanwhile, the combination of dry and wet is noticed;
6) In autumn, the Kandelia candel seedlings are subjected to proper anti-freezing training, and during 10-11 months each year, some compound fertilizers are applied, so that the growth of the Kandelia candel and the lignification degree of the plants are improved, and the tolerance of the plants to low temperature is increased;
7) In winter, the weather forecast is closely concerned, and the water level height in the Kandelia candel land is adjusted according to the winter temperature:
2. The planting method according to claim 1, wherein in the step 1), the mangrove plant Kandelia candel seedlings are planted in Yangtze river basin areas; in the step 4), the embryonic axis seedlings are from Taizhou, wenzhou, quanzhou or Zhangzhou areas of Zhejiang.
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| CN107960261B (en) * | 2017-11-28 | 2020-08-11 | 舟山赛莱特海洋科技有限公司 | Cold-resistant domestication method for Kandelia candel seedling pot culture planted at high latitude |
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