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

Aboveground biomass (g m−2), density, diversity, evenness, dominance and richness in non-cut (means ± SD, n = 30) and cut 11-year-old lucerne-rich fields (means ± SD, n = 112) in 2013 on the Loess Plateau.The different letters indicate significant differences at P < 0.05 in non-cut and cut lucerne-rich fields.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3: Aboveground biomass (g m−2), density, diversity, evenness, dominance and richness in non-cut (means ± SD, n = 30) and cut 11-year-old lucerne-rich fields (means ± SD, n = 112) in 2013 on the Loess Plateau.The different letters indicate significant differences at P < 0.05 in non-cut and cut lucerne-rich fields.

Mentions: In 2013, the aboveground biomass of lucerne and the whole plant community were significantly higher in the cut than the non-cut fields, but the densities of lucerne and the whole plant community were significantly lower (Fig. 3a–d). There were no significant differences in the Shannon–Wiener index, evenness index, dominance index and species richness between the cut and non-cut fields (Fig. 3e–h).


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)

Aboveground biomass (g m−2), density, diversity, evenness, dominance and richness in non-cut (means ± SD, n = 30) and cut 11-year-old lucerne-rich fields (means ± SD, n = 112) in 2013 on the Loess Plateau.The different letters indicate significant differences at P < 0.05 in non-cut and cut lucerne-rich fields.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3: Aboveground biomass (g m−2), density, diversity, evenness, dominance and richness in non-cut (means ± SD, n = 30) and cut 11-year-old lucerne-rich fields (means ± SD, n = 112) in 2013 on the Loess Plateau.The different letters indicate significant differences at P < 0.05 in non-cut and cut lucerne-rich fields.
Mentions: In 2013, the aboveground biomass of lucerne and the whole plant community were significantly higher in the cut than the non-cut fields, but the densities of lucerne and the whole plant community were significantly lower (Fig. 3a–d). There were no significant differences in the Shannon–Wiener index, evenness index, dominance index and species richness between the cut and non-cut fields (Fig. 3e–h).

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