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Rainfall-combined fertilization rejuvenation method for typical degraded grassland

A typical grassland and rainfall technology, applied in the fields of botanical equipment and methods, lawn growth, gardening, etc., can solve the problems of inability to restore grassland productivity, blind fertilization, low utilization rate, etc., and achieve the increase and decrease of nitrogen content. Environmental hazards and the effect of improving nitrogen utilization efficiency

Active Publication Date: 2018-07-20
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: First, the typical grasslands in northern my country are seriously degraded. In the absence of irrigation and supplementary water, the application of nitrogen fertilizer will lead to serious waste of fertilizers, low utilization rate, and the purpose of restoring grassland productivity cannot be achieved.
Second, the annual rainfall in the northern grasslands varies greatly, and there are obvious dry / wet years. At present, there are no measures to fertilize according to the characteristics of rainfall distribution. There is obvious blindness in fertilization. Whether there is fertilizer effect mainly depends on the opportunity

Method used

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  • Rainfall-combined fertilization rejuvenation method for typical degraded grassland
  • Rainfall-combined fertilization rejuvenation method for typical degraded grassland
  • Rainfall-combined fertilization rejuvenation method for typical degraded grassland

Examples

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Effect test

Embodiment 1

[0030] Selection of Dry Years and Wet Years in Typical Steppe Regions

[0031] Dry and wet years are determined based on the sum of precipitation in the first half of the year. Dry years: rainfall from January to June ≦ 150mm; wet years: rainfall from January to June ≥ 200mm.

[0032] Selection of degraded typical grasslands

[0033] The test site is located near the Xilinhe Reservoir, 9 kilometers south of Xilinhot City, Inner Mongolia. The geographical coordinates are: 43°50.671′ north latitude, 116°10.162′ east longitude, and an average altitude of 1077m. It is a temperate continental semi-arid climate with cold, windy, The climate is characterized by less rain, long sunshine, large temperature difference and strong evaporation. The annual average temperature is 7.5°C, the annual sunshine hours are more than 2700 hours, the rainfall is less, the annual rainfall is 200-350mm, the rainfall from May to July accounts for 60% of the annual rainfall, and the inter-annual rainfa...

Embodiment 2

[0034] Example 2 Fertilization and restoration experiment of degraded typical grassland

[0035] The degraded grassland fertilization experiment was carried out from 2014 to 2016. In the composition of the grassland plant community, grasses dominate, among which Stipa krylovii accounts for more than 77% of the yield in July, while the proportion of Leymus chinensis is low, with only 1 %, and the distribution is uneven. In July 2014, the grassland vegetation coverage was less than 50%; the grassland yield was generally low, and the aboveground biomass in August was less than 1000kg / ha.

[0036] The experimental design of fertilization restoration of degraded typical grassland is as follows: a completely random design is adopted, and 4 nitrogen fertilizer application rates are set, namely 0kg N / ha (N0), 50kg N / ha (N1), 100kg N / ha (N2) and 150kgN / ha ( N3). Each treatment was repeated 3 times, and each plot was 400 m 2 (20m×20m). Simultaneously set 2 phosphate levels, 0kg P 2...

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Abstract

The invention belongs to the technical field of grassland treatment, and discloses a rainfall-combined fertilization rejuvenation method for a typical degraded grassland. The method comprises the following steps of step 1, selection of a dry year and a wet year of a typical grassland region; step 2, selection of the typical degraded grassland; step 3, fertilization of the grassland. According to different inter-annual rainfall, different fertilization strategies are adopted to reduce the harm of nitrogen fertilizers to the environment and improve the utilization rate of the nitrogen fertilizers, and the primary productivity of a typical degraded grassland ecosystem can be improved to obtain good economic, social and ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of grassland management, and in particular relates to a fertilization and rejuvenation method for degraded typical grassland combined with rainfall Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Typical grasslands are mainly distributed in arid and semi-arid areas. Due to harsh natural conditions, the overall grassland productivity is not high. Coupled with the effects of long-term overgrazing, changes in land use and increased human production activities, 90% of grasslands have been degraded to varying degrees, resulting in serious deterioration of soil physical, chemical and biological properties, and reduction of grassland productivity and vegetation coverage. , and the decline of grassland ecological function. The soil nitrogen level of degraded grassland is low, which cannot meet the needs of plant growth. It is necessary to apply a ce...

Claims

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Application Information

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IPC IPC(8): A01G20/00
Inventor 郭彦军王党军姚露花黄蕾杜青峰
Owner SOUTHWEST UNIVERSITY
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