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Method for reseeding alfalfa in degenerated leymus chinensis pasture

A technology for degraded grassland and alfalfa, applied in the field of reseeding alfalfa on degraded Leymus chinensis grassland, can solve the problems of disturbing the nitrogen cycle of the ecosystem, low nitrogen use efficiency, loss of biodiversity, etc., and achieve beneficial nitrogen assimilation and biological Effect of maintaining diversity and improving stability

Active Publication Date: 2017-06-23
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From 1960 to 2000, the amount of nitrogen fertilizer applied in terrestrial ecosystems increased by 8 times, but less than 40% of the nitrogen fertilizer was absorbed and assimilated by plants. The low nitrogen use efficiency not only caused economic waste, but also caused great Disturbs ecosystem nitrogen cycling, an important driver of biodiversity loss
However, most of the domestic research on Medicago sativa focuses on the cultivation and domestication of seed resources, and there are few reports on the effect of reseeding Medicago sativa
Foreign studies on alfalfa re-seeding report that alfalfa has weak adaptability after re-seeding and is inhibited by the competition of grassland native vegetation. It is excluded by the competition of native vegetation in two years and cannot be maintained in the natural grassland for a long time

Method used

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  • Method for reseeding alfalfa in degenerated leymus chinensis pasture
  • Method for reseeding alfalfa in degenerated leymus chinensis pasture
  • Method for reseeding alfalfa in degenerated leymus chinensis pasture

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Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1, a kind of method of resowing alfalfa in degraded Leymus chinensis meadow

[0045] 1. Supplementary varieties

[0046] The species of re-sowing was wild yellow clover (Medicago falcata L.), which was collected from the natural grassland of Hulunbuir, and the seed germination rate was 92%.

[0047] 2. Sowing method

[0048] 1. Sowing time and place

[0049] Sowing time: June 4, 2013;

[0050] Sowing location: Xiertala Ranch, Hailar District, Hulunbeier City, Inner Mongolia (49°21'0.72"N, 120°5'48.77"E).

[0051] 2. Preparation before sowing

[0052] (1) Mowing

[0053] Before sowing, the original vegetation is mowed, including all the original vegetation of legumes and non-legumes, and the stubble height is 8-10cm.

[0054] (2) Rhizobia inoculation

[0055] Adopt the mode of direct seed dressing to carry out rhizobia inoculation to yellow alfalfa seed before sowing, inoculum amount is that 500g alfalfa seeds are inoculated with 55g rhizobia agent (pur...

Embodiment 2

[0070] Embodiment 2, a kind of method of reseeding alfalfa in degraded Leymus chinensis meadow

[0071] 1. Supplementary varieties

[0072] The supplementary seeding variety was the root tiller type alfalfa variety WL168 (Medicago sativa ssp.). Root tiller type alfalfa WL168 seeds are products of Beijing Zhengdao Ecological Technology Co., Ltd. (Beijing, China), with a germination rate of 98%.

[0073] 2. Sowing method

[0074] 1. Sowing time and place

[0075] Sowing time: June 4, 2013;

[0076] Sowing location: Xiertala Ranch, Hailar District, Hulunbeier City, Inner Mongolia (49°21'0.72"N, 120°5'48.77"E).

[0077] 2. Mowing

[0078] Before sowing, the original vegetation is mowed, including all the original vegetation of legumes and non-legumes, and the stubble height is 8-10cm.

[0079] 3. Sowing

[0080] Alfalfa reseeding on degraded Leymus meadow using no-tillage reseeding machine. Sowing row spacing: 30cm; sowing depth: 2cm; sowing rate: 15kg of inoculated seeds ...

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Abstract

The invention discloses a method for reseeding alfalfa in degenerated leymus chinensis pasture. The method comprises the following steps: reseeding alfalfa into natural pasture, and performing fertilization and pasture management of clipping at regular time, so as to maintain the ratio of the alfalfa in the natural pasture. Tests show that the pasture reseeding technique is simple to operate, and materials for reseeding, fertilizers and the like are wide in source, simple in production cost, low in cost and applicable to large-scale popularization. By adopting the reseeding technique disclosed by the invention, not only are productivity and forage grass quality of the degenerated leymus chinensis pasture improved, but also the nutrients of nitrogen in pasture soil are increased, utilization and circulation of the nitrogen in a pasture ecological system are promoted, diversity and stability of a pasture system are maintained, and technical supports are provided to establish high-yield stable natural pasture. The method has very high economic and ecological values, relatively high practicability and generalizability, and very wide application prospects.

Description

technical field [0001] The invention belongs to the field of ecological environment management and restoration, and in particular relates to a method for re-seeding alfalfa on degraded chinensis meadows. Background technique [0002] Grassland ecosystem is the type of ecosystem with the largest land area in my country, accounting for 40.7% of the country's land area, about 400 million hectares. In recent years, due to unreasonable grazing system, blind reclamation, excessive firewood harvesting and other human reasons, as well as natural factors brought about by climate change, 90% of the grassland area in my country has been degraded to varying degrees, mainly in Declining grassland productivity, loss of biodiversity, and intensified soil erosion severely restrict the functionality and stability of grassland ecosystems. Therefore, it has become a very urgent task to restore and rebuild the grassland ecosystem reasonably and effectively. [0003] Grassland reseeding is an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01C21/00A01C1/06
CPCA01C1/06A01C21/005A01G22/00
Inventor 张英俊周冀琼
Owner CHINA AGRI UNIV
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