Limits...
Cutting improves the productivity of lucerne-rich stands used in the revegetation of degraded arable land in a semi-arid environment.

Yuan ZQ, Yu KL, Wang BX, Zhang WY, Zhang XL, Siddique KH, Stefanova K, Turner NC, Li FM - Sci Rep (2015)

Bottom Line: Cutting significantly affected revegetation characteristics, such as aboveground biomass, plant density and diversity.Long-term cutting can cause self-thinning in lucerne, maintain the stability of lucerne production and slow its degradation.For effective management of lucerne fields, phosphate fertilizer should be applied and cutting performed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Grassland Agro-Ecosystem, Institute of Arid AgroEcology, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China.

ABSTRACT
Understanding the relationships between vegetative and environmental variables is important for revegetation and ecosystem management on the Loess Plateau, China. Lucerne (Medicago sativa L.) has been widely used in the region to improve revegetation, soil and water conservation, and to enhance livestock production. However, there is little information on how environmental factors influence long-term succession in lucerne-rich vegetation. Our objective was to identify the main environmental variables controlling the succession process in lucerne-rich vegetation such that native species are not suppressed after sowing on the Loess Plateau. Vegetation and soil surveys were performed in 31 lucerne fields (three lucerne fields without any management from 2003-2013 and 28 fields containing 11-year-old lucerne with one cutting each year). Time after planting was the most important factor affecting plant species succession. Cutting significantly affected revegetation characteristics, such as aboveground biomass, plant density and diversity. Soil moisture content, soil organic carbon, soil available phosphorus and slope aspect were key environmental factors affecting plant species composition and aboveground biomass, density and diversity. Long-term cutting can cause self-thinning in lucerne, maintain the stability of lucerne production and slow its degradation. For effective management of lucerne fields, phosphate fertilizer should be applied and cutting performed.

No MeSH data available.


Related in: MedlinePlus

Ordination diagram showing the results of redundancy analysis of species abundance and key experimental variables.Time, time after planting; SMC, soil moisture content; Aspect, slope aspect; SOC, soil organic C; AP, soil available P. Arrows (S1–S28) represent plant species (see supplementary Appendix 1).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4499809&req=5

f1: Ordination diagram showing the results of redundancy analysis of species abundance and key experimental variables.Time, time after planting; SMC, soil moisture content; Aspect, slope aspect; SOC, soil organic C; AP, soil available P. Arrows (S1–S28) represent plant species (see supplementary Appendix 1).

Mentions: Time after planting was the dominant environmental variable correlated with the first RDA axis (Fig. 1). Soil moisture content was the dominant environmental variable correlated with the second RDA axis. Annual species such as Convolvulus arvensis, Setaria viridis, Corispermum declinatum and Chenopodium glaucum were the pioneer species in the lucerne plant communities, and were negatively correlated with time after planting; they mainly appeared in communities in the first or second year after planting (Fig. 1). Perennial species such as Artemisia frigida, Heteropappus altaicus and Stipa capillata were positively correlated with time after planting, as they mainly appeared in later sampling years (Fig. 1).


Cutting improves the productivity of lucerne-rich stands used in the revegetation of degraded arable land in a semi-arid environment.

Yuan ZQ, Yu KL, Wang BX, Zhang WY, Zhang XL, Siddique KH, Stefanova K, Turner NC, Li FM - Sci Rep (2015)

Ordination diagram showing the results of redundancy analysis of species abundance and key experimental variables.Time, time after planting; SMC, soil moisture content; Aspect, slope aspect; SOC, soil organic C; AP, soil available P. Arrows (S1–S28) represent plant species (see supplementary Appendix 1).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4499809&req=5

f1: Ordination diagram showing the results of redundancy analysis of species abundance and key experimental variables.Time, time after planting; SMC, soil moisture content; Aspect, slope aspect; SOC, soil organic C; AP, soil available P. Arrows (S1–S28) represent plant species (see supplementary Appendix 1).
Mentions: Time after planting was the dominant environmental variable correlated with the first RDA axis (Fig. 1). Soil moisture content was the dominant environmental variable correlated with the second RDA axis. Annual species such as Convolvulus arvensis, Setaria viridis, Corispermum declinatum and Chenopodium glaucum were the pioneer species in the lucerne plant communities, and were negatively correlated with time after planting; they mainly appeared in communities in the first or second year after planting (Fig. 1). Perennial species such as Artemisia frigida, Heteropappus altaicus and Stipa capillata were positively correlated with time after planting, as they mainly appeared in later sampling years (Fig. 1).

Bottom Line: Cutting significantly affected revegetation characteristics, such as aboveground biomass, plant density and diversity.Long-term cutting can cause self-thinning in lucerne, maintain the stability of lucerne production and slow its degradation.For effective management of lucerne fields, phosphate fertilizer should be applied and cutting performed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Grassland Agro-Ecosystem, Institute of Arid AgroEcology, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China.

ABSTRACT
Understanding the relationships between vegetative and environmental variables is important for revegetation and ecosystem management on the Loess Plateau, China. Lucerne (Medicago sativa L.) has been widely used in the region to improve revegetation, soil and water conservation, and to enhance livestock production. However, there is little information on how environmental factors influence long-term succession in lucerne-rich vegetation. Our objective was to identify the main environmental variables controlling the succession process in lucerne-rich vegetation such that native species are not suppressed after sowing on the Loess Plateau. Vegetation and soil surveys were performed in 31 lucerne fields (three lucerne fields without any management from 2003-2013 and 28 fields containing 11-year-old lucerne with one cutting each year). Time after planting was the most important factor affecting plant species succession. Cutting significantly affected revegetation characteristics, such as aboveground biomass, plant density and diversity. Soil moisture content, soil organic carbon, soil available phosphorus and slope aspect were key environmental factors affecting plant species composition and aboveground biomass, density and diversity. Long-term cutting can cause self-thinning in lucerne, maintain the stability of lucerne production and slow its degradation. For effective management of lucerne fields, phosphate fertilizer should be applied and cutting performed.

No MeSH data available.


Related in: MedlinePlus