Effects of No-Till Seeding and Fertilization on Vegetation Restoration and Soil Physicochemical Properties in Alpine Degraded Grazing Grasslands
This study evaluated the effects of no-till seeding and fertilization on the restoration of degraded grazing grasslands in Bayinbuluke. Poaceae species were selected for no-till replanting, with <i>Elymus dahuricus</i>, <i>Puccinellia distans</i>, and <i>Festuca ovina&l...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
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| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/15/3/578 |
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| Summary: | This study evaluated the effects of no-till seeding and fertilization on the restoration of degraded grazing grasslands in Bayinbuluke. Poaceae species were selected for no-till replanting, with <i>Elymus dahuricus</i>, <i>Puccinellia distans</i>, and <i>Festuca ovina</i> mixed in a 2:1:1 ratio. Four sowing rates were applied: 0 g/m<sup>2</sup> (A0), 2 g/m<sup>2</sup> (A1), 4 g/m<sup>2</sup> (A2), and 6 g/m<sup>2</sup> (A3). Diammonium phosphate (N 18%, P<sub>2</sub>O<sub>5</sub> 46%) was used as fertilizer, with four fertilization rates: 0 g/m<sup>2</sup> (B0), 7.5 g/m<sup>2</sup> (B1), 15 g/m<sup>2</sup> (B2), and 22.5 g/m<sup>2</sup> (B3). A total of 16 treatments were applied. The study assessed the changes in grassland productivity, species diversity, and soil physicochemical properties. The results showed that no-till replanting significantly increased the aboveground biomass by 81%, species richness by 55.8%, and the Shannon–Wiener diversity index by 64.2%. Fertilization significantly increased productivity, with dry hay yield rising by 60.9% to 81%. When 22.5 g/m<sup>2</sup> of fertilizer was applied, the contents of total phosphorus, total nitrogen, available phosphorus, and organic matter in the soil increased by 43.4%, 50.6%, 66%, and 31.2%, respectively. Fertilization also improved the stability of soil aggregates, with the proportion of large aggregates increasing by 18.2%. The findings suggest that no-till seeding and fertilization significantly promote grassland restoration, with soil moisture and nutrient availability being key drivers of vegetation growth and community diversity. |
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| ISSN: | 2073-4395 |