Leymus chinensis planting method for salinized sand land

Abstract

The invention relates to the technical field of leymus chinensis planting, in particular to a method for planting leymus chinensis in a salinized sand land, which is used for interplanting mousse winterplant in an oat land. The row spacing is 80 cm, the sowing depth is 1-1.5 cm, the sowing amount is 0.5 kg / mu, sowing is carried out in line, and 27.8 kg / mu urea (N is greater than or equal to 46%) is applied as a base fertilizer. Timely irrigation. The fertilizer is applied once in spring every year. A test nitrogen fertilizer is urea (N > = 46%), a phosphate fertilizer is triple superphosphate (P2O5 > = 44%), a potash fertilizer is potassium sulfate (K2O > = 52%), and timely irrigation is carried out. According to the invention, not only is a proper fertilizer combination provided, but also the growth, development and asexual reproduction capabilities of leymus chinensis are greatly improved. The planting effect of leymus chinensis can be effectively improved, the yield and quality of leymus chinensis are improved, and good practicability is achieved. Meanwhile, the formula is economical and reasonable, and is easy to popularize and apply.

Description

Technical Field

[0001] The invention relates to the technical field of sheep fescue planting, in particular to a method for planting sheep fescue in salinized sandy land. Background Art

[0002] Leymus chinensis is a perennial rhizome forage grass of the genus Leymus in the Poaceae family, also known as alkali grass. It has high nutritional value, many leaves and thin stems, good palatability, long growth period and strong stress resistance. It is an ideal forage grass and a widely used ecological grass species. When artificially constructing sheep grass grassland in the Alxa region, we must not only consider the environmental protection of its ecologically fragile zone, but also pay attention to the sustainable development of animal husbandry. Establish high-quality artificial sheep grass grassland. The Alxa region has sufficient sunshine, but water resources are scarce, the soil is poor, and the ecological environment is extremely fragile. The comprehensive management of the desert in western Inner Mongolia in the Alxa League is an important part of the "Three Norths Project". The oasis in the Alxa region is an important animal husbandry and agricultural base in the region. At present, Leymus chinensis has been successfully established in the Alxa region.

[0003] At present, most research focuses on the effects of single fertilizers such as nitrogen and phosphorus fertilizers on sheep fescue or the research on sheep fescue establishment methods. There are few reports on the effects of different fertilizer combinations on the production performance and quality of sheep fescue. In addition, there is currently a single variety of high-quality forage in the Alxa region of Inner Mongolia, and there is also little research on sheep fescue in sandy areas such as Alxa. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for planting sheepgrass in salinized sandy land and a fertilization formula thereof, which can not only promote the growth and asexual reproduction of sheepgrass, but also avoid the adverse effects of excessive fertilizer on the soil.

[0005] In order to achieve the above purpose, the technical solutions provided are as follows:

[0006] A method for planting Leymus chinensis in salinized sandy land, characterized by comprising the following steps:

[0007] S1. Determine the location and area of ​​sandy and saline-alkali land where Leymus chinensis needs to be planted, and prepare the fertilizers needed;

[0008] S2. Carry out land preparation and trenching operations on sandy and saline-alkali lands where sheepgrass is to be planted;

[0009] S3, sowing the chinensis seeds in the ditch in step S2;

[0010] S4, applying the fertilizer prepared in step S1;

[0011] S5. Remove weeds and irrigate the land after planting;

[0012] S6. Apply fertilizer once every spring or apply base fertilizer when sowing in autumn.

[0013] Preferably, in S4, Leymus chinensis is interplanted in an oat field.

[0014] Preferably, in S4, the ditch row spacing is 80 cm.

[0015] Preferably, in S4, the sowing depth is 1-1.5 cm and the sowing amount is 0.5 kg / mu.

[0016] Preferably, in S6, when sowing in spring, the fertilizer is urea (N≥46%) as the nitrogen fertilizer, double superphosphate (P2O5≥44%) as the phosphorus fertilizer, and potassium sulfate (K2O≥52%) as the potash fertilizer.

[0017] Preferably, in S6, when sowing in autumn, the base fertilizer is 27.8 kg / mu urea (N≥46%) spread.

[0018] The beneficial effect of the present invention is that the present invention studies the influence of different fertilizer combinations on the asexual reproduction of Leymus chinensis, and can further provide the best fertilizer combination scheme for the rapid establishment of Leymus chinensis in the Alxa region, thereby improving the establishment speed and high yield of Leymus chinensis. It provides a theoretical basis for balanced fertilization and high-quality and high-yield Leymus chinensis in the Alxa region, and provides technical support for ecological protection and sustainable development of animal husbandry in areas with similar water and heat conditions to the region.

[0019] The present invention not only proposes a suitable fertilizer combination, but also greatly improves the growth and development and asexual reproduction ability of Leymus chinensis. It can effectively improve the establishment effect of Leymus chinensis, increase the yield and quality of Leymus chinensis, and has good practicality. At the same time, the formula is economically reasonable and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the biomass of a single Leymus chinensis plant under different nitrogen, phosphorus and potassium ratios in the embodiment of the present invention;

[0021] Figure 2 is the number of tillers of Leymus chinensis under different nitrogen, phosphorus and potassium ratios in the embodiment of the present invention;

[0022] Figure 3 The number and height of Leymus chinensis seedlings under different nitrogen, phosphorus and potassium ratios in the embodiment of the present invention;

[0023] Figure 4 The number and total length of rhizomes of Leymus chinensis under different nitrogen, phosphorus and potassium ratios in the embodiment of the present invention;

[0024] Figure 5 It is the number of buds under different nitrogen, phosphorus and potassium ratios in the embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] 1. Overview of the test site

[0028] The experimental site is located at the Alxa Desert-Oasis Grassland Field Scientific Observation and Research Station of Lanzhou University, in Alxa Left Banner, Alxa League, Inner Mongolia Autonomous Region. The area has a temperate continental arid climate with an average annual temperature of 8°C, an annual precipitation of 80-150mm, an annual evaporation of 3000-4000mm, and a frost-free period of 120-180 days. It is a typical arid desert shrub grassland with brown desert soil.

[0029] 2. Experimental plan

[0030] In August 2022, interplant Xiwuzhumuqin chinensis in oat fields. Row spacing 80cm, sowing depth 1-1.5cm, sowing rate 0.5kg / mu. Plot area 28m 2 (4m×7m). Row sowing. Spread 27.8kg / mu urea (N≥46%) as base fertilizer. Irrigate at the right time. The "3414" scheme is adopted for fertilization. The test plots are fertilized in 2023 and 2024 respectively, and the fertilizer is applied once every spring. The nitrogen fertilizer for the test fertilizer is urea (N≥46%), the phosphorus fertilizer is heavy superphosphate (P2O5≥44%), and the potassium fertilizer is potassium sulfate (K2O≥52%). Irrigate at the right time.

[0031] The "3414" program is: 3 factors of nitrogen, phosphorus and potassium, 4 levels, and 14 treatments.

[0032] 3. The fertilization treatments are shown in the table below, where level 0 refers to no fertilization, level 2 refers to the local recommended fertilization amount, level 1 (insufficient fertilization) = level 2*0.5, and level 3 (excessive fertilization) = level 2*1.5.

[0033]

[0034] 4. Sample collection and index determination

[0035] In autumn, destructive sampling was carried out on the sheep grass, and the whole sheep grass was taken out and put into envelopes, and then brought back to the laboratory for index determination. After the sheep grass was divided and cleaned indoors, it was weighed, measured and counted.

[0036] Number of daughter plants: the number of new plants produced by each rhizome of the mother plant;

[0037] Subplant height: measure the subplant height of the plant and record;

[0038] Tiller number: record the number of branches produced by Leymus chinensis at the tillering node near the ground;

[0039] Biomass of a single plant: put it into an oven at 105℃ for 30 minutes, then dry it at 65℃ to constant weight, and weigh it;

[0040] Number of rhizomes: Count the rhizomes of the dug-out intact plants after washing them;

[0041] Rhizome length: add up the lengths of all rhizomes of a chinensis plant;

[0042] Tillering bud number: Buds produced on tillering nodes were counted and recorded as tillering buds;

[0043] Number of rhizome buds: Count the buds growing from rhizome nodes and rhizome tips, and record them as rhizome buds;

[0044] Total bud number: the sum of tiller buds and rhizome buds.

[0045] 4. Results and Analysis

[0046] 4.1 Effects of different nitrogen, phosphorus and potassium fertilizer ratios on the growth characteristics of Leymus chinensis

[0047] Individual plant biomass is an important trait reflecting the growth status of Leymus chinensis. Figure 1 It can be seen that the N2P2K0 treatment was significantly lower than the control group and other treatment groups (P<0.05). When N and K were both at level 2, the single plant biomass of N2P2K2 and N2P3K2 reached the maximum value, and was significantly higher than that of N2P2K0 and N1P2K2 treatments (P<0.05). The lack of N and K would significantly affect the growth of Leymus chinensis and reduce the single plant biomass of Leymus chinensis.

[0048] Tiller number is an important trait that determines the production of Leymus chinensis. Figure 2 It can be seen that the N3P2K2 treatment was significantly higher than the control group and other treatment groups. When P and K were both at level 2, the number of tillers in the N1P2K2, N2P2K2, and N3P2K2 treatments increased significantly with the increase of N level. The increase in N can significantly increase the number of tillers of Leymus chinensis. The number of tillers in the N2P2K0 treatment reached the minimum value, and K is indispensable for the tillering of Leymus chinensis.

[0049] Leymus chinensis is a grass that mainly reproduces asexually. The number and height of the seedlings are also important traits that reflect the growth status of Leymus chinensis. Figure 3It can be seen that the number of seedlings reached the maximum value under the N2P2K2 treatment, which was significantly higher than that of the control group (P<0.05); the height of the seedlings reached the maximum value under N2P2K1, which was significantly higher than that of the seedlings treated with N2P3K2 (P<0.05). Excessive P will inhibit the growth of Leymus chinensis seedlings.

[0050] 4.2 Effects of different nitrogen, phosphorus and potassium fertilizer ratios on rhizome characteristics of Leymus chinensis

[0051] The underground rhizomes of Leymus chinensis are well developed, and the rhizome-related characteristics can reflect the asexual reproduction ability of Leymus chinensis. Figure 4 It can be seen that different fertilizer ratios can significantly increase the number of rhizomes of Leymus chinensis (P<0.05). The number of rhizomes reached the maximum when the fertilizer ratio was N2P1K2. When both N and K were at the level of 2, the increase of P had no significant effect on the number of rhizomes of Leymus chinensis (P>0.05).

[0052] The total length of rhizomes can reflect the expansion ability of Leymus chinensis clones. The total length of rhizomes of Leymus chinensis reached the maximum under N2P2K2 treatment, which was significantly higher than N0P0K0, N2P0K2 and N2P2K0 (P<0.05). Both P and K deficiency affect the elongation of rhizomes of Leymus chinensis.

[0053] 4.3 Effects of different nitrogen, phosphorus and potassium fertilizer ratios on the number of bud banks in Leymus chinensis

[0054] Tillering buds and rhizome buds are quantitative traits reflecting the asexual reproduction potential of Leymus chinensis. The number of tillering buds under N3P2K2 treatment was significantly higher than that under N0P2K2 treatment (P<0.05), indicating that N is an important element affecting the tillering potential of Leymus chinensis. The number of rhizome buds under N2P2K2 and N2P3K2 treatments was significantly greater than that under N2P2K0 treatment (P<0.05). The increase of P promotes the formation of rhizome buds by rhizomes of Leymus chinensis, and K is a limiting factor for rhizome buds.

[0055] Depend on Figure 5 It can be seen that there was no significant difference in the total number of buds (P>0.05), but from the trend point of view, K fertilizer was not conducive to the accumulation of the total bud bank of Leymus chinensis.

[0056] 5. Conclusion

[0057] The combination of nitrogen, phosphorus and potassium fertilizers can improve the success rate and quality of artificial establishment of Leymus chinensis in sandy soil. In summary, the N2P2K2 and N2P3K2 treatments performed well in terms of Leymus chinensis growth and development, rhizome expansion ability and asexual reproduction potential. When the fertilization ratio was N2P2K2, the biomass of Leymus chinensis per plant, the number of Leymus chinensis sub-plants, the number of rhizomes, the total length of rhizomes, and the total number of buds were all higher; when the fertilization ratio was N2P3K2, the biomass of Leymus chinensis per plant, the number of Leymus chinensis sub-plants, the number of rhizomes, the total length of rhizomes, and the total number of buds were all higher; the values ​​reached the maximum or had no significant difference from the maximum value (P>0.05).

[0058] In this invention, it is recommended to use N2P2K2 ratio for planting Leymus chinensis in sandy soil, 434.78Kg / hm 2 Urea and 340.91Kg / hm 2 Triple superphosphate and 57.69Kg / hm 2 The application of potassium sulfate can achieve better nutrient retention and utilization effects, and will not cause fertilizer waste and soil pollution, laying a good soil foundation for the subsequent growth and development of plants.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for planting Leymus chinensis in salinized sandy land, characterized in that: The steps include: S1. Determine the location and area of ​​sandy and saline-alkali land where Leymus chinensis needs to be planted, and prepare the fertilizers needed; S2. Carry out land preparation and trenching operations on sandy and saline-alkali lands where sheepgrass is to be planted; S3, sowing the chinensis seeds in the ditch in step S2; S4, applying the fertilizer prepared in step S1; S5. Remove weeds and irrigate the land after planting; S6. Apply fertilizer once every spring or apply base fertilizer when sowing in autumn.

2. The method for planting Leymus chinensis in salinized sandy land according to claim 1, characterized in that: In S4, Xiwuzhumuqin Leymus chinensis was interplanted in oat fields.

3. The method for planting Leymus chinensis in salinized sandy land according to claim 1, characterized in that: In S4, the ditch row spacing is 80 cm.

4. The method for planting Leymus chinensis in salinized sandy land according to claim 1, characterized in that: In S4, the sowing depth is 1-1.5 cm and the sowing rate is 0.5 kg / mu.

5. The method for planting Leymus chinensis in salinized sandy land according to claim 1, characterized in that: In S6, during spring sowing, the fertilizers are urea (N≥46%) for nitrogen fertilizer, triple superphosphate (P2O5≥44%) for phosphorus fertilizer, and potassium sulfate (K2O≥52%) for potassium fertilizer.

6. The method for planting Leymus chinensis in salinized sandy land according to claim 1, characterized in that: In S3, during autumn sowing, the base fertilizer is 27.8 kg / mu urea (N≥46%) spread.

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