CN115250822A - Method for promoting Yunnan pine to bloom and fruit in advance - Google Patents

Abstract

The invention discloses a method for promoting Yunnan pine to bloom and fruit in advance, which comprises the steps of selecting fine varieties of the Yunnan pine and cultivating 2-year-old container seedlings; planting seedlings, namely planting the seedlings on the red soil suitable for the growth of the Yunnan pine; the planting density is 2m of row spacing of plants or 2 rows of 1m of row spacing of plants, and the spacing is 2m. The method disclosed by the invention promotes the Yunnan pine pollen to bloom earlier by adopting a planting method and a management measure different from the traditional method, provides a good technical measure for utilizing the pine pollen, particularly for collecting the pine pollen, blooms earlier, most of trees are less than 2 meters, and provides a good technical measure for cultivating a dwarf Yunnan pine pollen collecting garden.

Description

A method for promoting early flowering and fruiting of Yunnan pine

technical field

The invention relates to the technical field of forestry planting, in particular to a method for promoting early flowering and fruiting of Yunnan pine.

Background technique

Pinus Yunnanensis (Pinus Yunnanensis) is an evergreen tree belonging to the genus Pinaceae. It has strong adaptability to habitats and is a pioneer tree species for afforestation of barren hills. The age at which Pinus yunnanensis begins to bear fruit varies greatly. Generally speaking, natural forests usually bear fruit in 8-10 years, and artificial forests generally bloom and bear fruit after 5-6 years of planting. The reproductive physiology is not yet mature in the first three years, and the flowering mechanism in the tree If the hormone does not reach a certain concentration, it will not bloom and bear fruit. The flowering and fruiting age of Pinus yunnanensis is related to the stand origin, provenance, site conditions and heredity of the parent tree. The artificially cultivated Yunnan pine forests flower and bear fruit early and use seed collection and pine pollen collection.

Contents of the invention

In view of the above problems, the invention provides a method for promoting early flowering and fruiting of Yunnan pine.

According to the purpose of the present invention, the present invention provides a kind of method that promotes Yunnan pine to bloom and bear fruit early, comprising the steps:

S1, seedling selection

Select fine varieties of Yunnan pine to cultivate 2-year-old container seedlings;

S2, planting method

Seedlings are planted on red soil suitable for the growth of Yunnan pine;

S3, planting density

The planting density is planted in 2 rows with a row spacing of 2m or a row spacing of 1m, with a spacing of 2m.

Further, in S2, it is necessary to prepare the soil before transplanting: use hole-shaped soil preparation, and the size of the soil preparation is 40cm×40cm×30cm.

Further, in S2, apply base fertilizer after digging the pond, and use compound fertilizer as base fertilizer, 200g of compound fertilizer per pond, apply base fertilizer first, then cover with soil about 5cm, and then plant seedlings.

Further, in the first year after planting and in the second year after planting, 200 g/pond was topdressed, and the topdressing was compound fertilizer.

Further, the weeding is once a year in the year of transplanting, in the first year after transplanting and in the second year after planting.

Further, the spraying of pesticides is the first year after planting and the second year after planting. Every year, 25 mL of spirotetramethiamethoxam and 15 ml of Gaojin mixed with 15 kg of water are used to spray the water without dripping, so as to prevent livestock from harming.

The beneficial effects of the present invention are:

The present invention promotes the early flowering of Yunnan pine by adopting different planting methods and management measures, and provides good technical measures for utilizing pine pollen, especially in the collection of pine pollen, early flowering, most of the trees are below 2 meters, It provides good technical measures for cultivating dwarf Yunnan pine pollen collection gardens.

Description of drawings

Figure 1 is a statistical map of the flowering conditions of Pine yunnanensis edited by Jin Zhenzhou and Peng Jian.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

A method for promoting early flowering and fruiting of Yunnan pine, comprising the steps of:

S1, seedling selection

Select fine varieties of Yunnan pine to cultivate 2-year-old container seedlings;

S2, planting method

Seedlings are planted on red soil suitable for the growth of Yunnan pine;

S3, planting density

The planting density is planted in 2 rows with a row spacing of 2m or a row spacing of 1m, with a spacing of 2m.

Before transplanting, it is necessary to prepare the ground and make a pond: use hole-shaped soil preparation, and the size of the soil preparation is 40cm×40cm×30cm.

Apply base fertilizer after digging the pond, the base fertilizer is compound fertilizer, compound fertilizer 200g/pond, apply base fertilizer first, then cover with soil about 5cm, and then plant seedlings. In the first year after planting and in the second year after planting, topdress 200g/pond, and the topdressing fertilizer is compound fertilizer. Weeding is once a year in the year of transplanting, the first year after transplanting and the second year after planting. The spraying of pesticides is the first year after planting and the second year after planting. Every year, 25 mL of spirulina thiamethoxam and 15 ml of high gold mixed with 15 kg of water are used for spraying without dripping, so as to prevent livestock from harming. The high gold used in this embodiment is an insecticide with strong penetrating power.

Example 2

A method for promoting early flowering and fruiting of Yunnan pine, comprising the steps of:

1. Select Yunnan pine fine varieties to cultivate 2-year-old container seedlings, and plant them on red soil suitable for the growth of Yunnan pine.

2. Planting techniques include:

Provenance: Yunnan Pine (Fine Variety)

Planting seedlings: 2-year-old container seedlings

Planting time: July 2018, replanting in July 2019

Planting method: planting seedlings

Soil preparation method (drilling a pond): pit-shaped soil preparation is adopted, and the size of the soil preparation is 40cm×40cm×30cm.

Base fertilizer: compound fertilizer 200g/pond, apply base fertilizer first, then cover with soil about 5cm, and then plant seedlings.

Management measures: topdressing in the later stage, topdressing 200g/pond in 2019 and 2020, topdressing is compound fertilizer. Weeding is 2018, 2019, 2020, once a year. Spraying pesticides in 2019 and 2020, use 25mL of spirotetramethoxam and 15ml of Gaojin mixed with 15kg of water every year to spray the water without dripping. Prevent livestock hazards, etc.

3. Planting method

The wide-narrow row control experiment was used to make the forest trees compete in the early stage with boundary effects, promote the rapid growth and canopy closure of the trees, and screen out the fast-growing and high-yield forest construction model of the Yunnan pine forest felling or burning.

The planting density includes the following 6:

(1) A1: the spacing between plants and rows is 50cm;

(2) A2: The spacing between plants and rows is 1m;

(3) A3: The spacing between plants and rows is 2m;

(4) A4: Plant 2 rows with a spacing of 1m between plants and rows, with a spacing of 2m;

(5) A5: plant 3 rows with a spacing of 1m between plants and rows, with a spacing of 2m;

(6) A6: Plant 4 rows with a spacing of 1m between plants and rows, with a spacing of 3m.

4. The effect of flowering and seed setting rate

As shown in Figure 1, it can be seen from the Yunnan Pine edited by Jin Zhenzhou and Peng Jian that it takes more than 6 years for Yunnan Pine to bloom and set fruit, and the flowering and setting rate in the sixth year is only 0.8%. Even in the tenth year, the flowering and setting rate is also low. Only 21.3%.

And adopt the measure that the present invention takes, plant in 2018, there is no flowering and fruiting phenomenon when measuring in 2020, but when measuring in March, 2021, the flowering and seeding rate reaches more than 53%, and the time of planting to flowering and seeding is only 2 years8 months, greatly shortening the time for flowering and fruiting.

Table 1 The growth and flowering and fruiting status of Yunnan pine in different planting methods

According to the test data, different densities have obvious effects on growth, flowering and fruiting. The density of Pine yunnanensis planted at a plant-to-row spacing of 50 cm is too high, and the growth is relatively slow and the flowering is relatively small. Compared with the seed setting rate, there is a substantial increase.

The present invention promotes the early flowering of Yunnan pine by adopting different planting methods and management measures, and provides good technical measures for utilizing pine pollen, especially in the collection of pine pollen, early flowering, most of the trees are below 2 meters, It provides good technical measures for cultivating dwarf Yunnan pine pollen collection gardens.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (6)

1. a method for promoting Yunnan pine to bloom and bear fruit early, is characterized in that, comprises the steps: S1, seedling selection Select fine varieties of Yunnan pine to cultivate 2-year-old container seedlings; S2, planting method Seedlings are planted on red soil suitable for the growth of Yunnan pine; S3, planting density The planting density is planted in 2 rows with a row spacing of 2m or a row spacing of 1m, with a spacing of 2m. 2. The method for promoting early flowering and fruiting of Yunnan pine according to claim 1, characterized in that, in S2, before transplanting, it is necessary to prepare the ground and make a pond: use hole-shaped soil preparation, and the size of the soil preparation is 40cm×40cm×30cm. 3. the method for promoting Yunnan pine to bloom and bear fruit early according to claim 2, it is characterized in that, in S2, apply base fertilizer after making pond, base fertilizer adopts compound fertilizer, compound fertilizer 200g/pond, apply base fertilizer earlier, cover soil about 5cm then , and then plant seedlings. 4. the method for promoting Yunnan pine to bloom and bear fruit early according to claim 3 is characterized in that, topdressing 200g/pond in the first year after planting and the second year after planting, topdressing is compound fertilizer. 5. the method for promoting the early flowering and fruiting of Yunnan pine according to claim 3 is characterized in that weeding is the year of transplanting, the first year after transplanting and the second year after planting, once a year. 6. the method for promoting Yunnan pine to bloom and bear fruit early according to claim 3 is characterized in that spraying pesticides is the first year after planting and the second year after planting, and snail thiamethoxam 25mL and high gold 15mL are used every year Mix 15kg of water with fine mist to spray moisture without dripping, so as to prevent livestock from being harmed.

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