Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin
Climate, land-use changes, and nitrogen (N) deposition strongly impact plant primary productivity, particularly in alpine grassland ecosystems. In this study, the differential responses of plant community primary productivity to N and phosphorus (P) nutrient application were investigated in the natu...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2021-12-01
|
| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2021.792123/full |
| _version_ | 1818363069735108608 |
|---|---|
| author | Chunli Li Yonghui Li Xinwei Li Li Ma Yuanming Xiao Chunhui Zhang |
| author_facet | Chunli Li Yonghui Li Xinwei Li Li Ma Yuanming Xiao Chunhui Zhang |
| author_sort | Chunli Li |
| collection | DOAJ |
| description | Climate, land-use changes, and nitrogen (N) deposition strongly impact plant primary productivity, particularly in alpine grassland ecosystems. In this study, the differential responses of plant community primary productivity to N and phosphorus (P) nutrient application were investigated in the natural (NG) and “Grain for Green” restored (RG) alpine grasslands by a continuous 3-year experiment in the Qinghai Lake Basin. N addition only significantly promoted plant aboveground biomass (AGB) by 42% and had no significant effect on belowground biomass (BGB) and total biomass (TB) in NG. In comparison with NG, N addition elevated AGB and BGB concurrently in RG by 138% and 24%, respectively, which further significantly increased TB by 41% in RG. Meanwhile, N addition significantly decreased BGB and the AGB ratio (R/S) both in NG and RG. Compared with N addition, P addition did not perform an evident effect on plant biomass parameters. Additionally, AGB was merely negatively influenced by growing season temperatures (GST) under the N addition treatment in NG. AGB was negatively associated with GST but positively related to growing season precipitation (GSP) in RG. By contrast, changes in the R/S ratio in RG were positively correlated with GST and negatively related to GSP. In sum, the results revealed that plant community biomass exhibited convergent (AGB and R/S) and divergent (BGB and TB) responses to N addition between NG and RG. In addition, the outcomes suggested that climate warming would enhance plant biomass allocation to belowground under ongoing N deposition, and indicated the significance of precipitation for plant growth and AGB accumulation in this restored alpine grassland ecosystem. |
| first_indexed | 2024-12-13T21:42:37Z |
| format | Article |
| id | doaj.art-0d01acd6d5d24aca8e535f8642c1e9c9 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-13T21:42:37Z |
| publishDate | 2021-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-0d01acd6d5d24aca8e535f8642c1e9c92022-12-21T23:30:30ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2021-12-011210.3389/fpls.2021.792123792123Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake BasinChunli Li0Yonghui Li1Xinwei Li2Li Ma3Yuanming Xiao4Chunhui Zhang5State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, ChinaState Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, ChinaState Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, ChinaKey Laboratory of Cold Regions Restoration Ecology, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, ChinaKey Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, ChinaState Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, ChinaClimate, land-use changes, and nitrogen (N) deposition strongly impact plant primary productivity, particularly in alpine grassland ecosystems. In this study, the differential responses of plant community primary productivity to N and phosphorus (P) nutrient application were investigated in the natural (NG) and “Grain for Green” restored (RG) alpine grasslands by a continuous 3-year experiment in the Qinghai Lake Basin. N addition only significantly promoted plant aboveground biomass (AGB) by 42% and had no significant effect on belowground biomass (BGB) and total biomass (TB) in NG. In comparison with NG, N addition elevated AGB and BGB concurrently in RG by 138% and 24%, respectively, which further significantly increased TB by 41% in RG. Meanwhile, N addition significantly decreased BGB and the AGB ratio (R/S) both in NG and RG. Compared with N addition, P addition did not perform an evident effect on plant biomass parameters. Additionally, AGB was merely negatively influenced by growing season temperatures (GST) under the N addition treatment in NG. AGB was negatively associated with GST but positively related to growing season precipitation (GSP) in RG. By contrast, changes in the R/S ratio in RG were positively correlated with GST and negatively related to GSP. In sum, the results revealed that plant community biomass exhibited convergent (AGB and R/S) and divergent (BGB and TB) responses to N addition between NG and RG. In addition, the outcomes suggested that climate warming would enhance plant biomass allocation to belowground under ongoing N deposition, and indicated the significance of precipitation for plant growth and AGB accumulation in this restored alpine grassland ecosystem.https://www.frontiersin.org/articles/10.3389/fpls.2021.792123/fullalpine grasslandplant primary productivitynitrogen and phosphorus additionsrestored grasslandclimate change |
| spellingShingle | Chunli Li Yonghui Li Xinwei Li Li Ma Yuanming Xiao Chunhui Zhang Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin Frontiers in Plant Science alpine grassland plant primary productivity nitrogen and phosphorus additions restored grassland climate change |
| title | Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin |
| title_full | Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin |
| title_fullStr | Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin |
| title_full_unstemmed | Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin |
| title_short | Differential Responses of Plant Primary Productivity to Nutrient Addition in Natural and Restored Alpine Grasslands in the Qinghai Lake Basin |
| title_sort | differential responses of plant primary productivity to nutrient addition in natural and restored alpine grasslands in the qinghai lake basin |
| topic | alpine grassland plant primary productivity nitrogen and phosphorus additions restored grassland climate change |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2021.792123/full |
| work_keys_str_mv | AT chunlili differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin AT yonghuili differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin AT xinweili differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin AT lima differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin AT yuanmingxiao differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin AT chunhuizhang differentialresponsesofplantprimaryproductivitytonutrientadditioninnaturalandrestoredalpinegrasslandsintheqinghailakebasin |