文献类型： 外文期刊
作者： Bai, Y. 1 ; Xia, J. 1 ; Schellenberg, M. P. 3 ; Yan, R. 4 ; Zhang, R. 5 ; Lv, S. 2 ; Wei, Z. 2 ;
作者机构： 1.Binzhou Univ, Shandong Key Lab Ecoenvironm Sci Yellow River Del, Binzhou 256603, Peoples R China
2.Inner Mongolia Agr Univ, Inner Mongolia Key Lab Grassland Management & Uti, Key Lab Forage Cultivat Proc & High Efficient Uti, Coll Grassland Resources & Environm Key Lab Grass, 29 Erdos St, Hohhot 010011, Inner Mongolia, Peoples R China
3.Agr & Agri Food Canada, Swift Current Res & Dev Ctr, 1 Airport Rd,Box 1030, Swift Current, SK S9H 3X2, Canada
4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
关键词： nitrogen fertilizer; phosphorus fertilizer; potassium fertilizer; community biomass; species diversity
期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.797 ）
ISSN： 1589-1623
年卷期： 2021 年 19 卷 5 期
页码：
收录情况： SCI
摘要： Fertilizer addition can improve soil nutrients in degraded grasslands, change plant community composition, and promote community productivity. An experiment was established in 2014 near Hulunbuir Grassland Ecosystem National Field Observation Station at Hulunbuir in Inner Mongolia, China, using L14 (3(4)) orthogonal test with 14 treatments totally, to compare the change of plant community productivity and plant diversity during three years of fertilization. We monitored the dynamic responses of aboveground biomass, plant species composition, species richness, Shannon diversity, Pielou's evenness after nitrogen (N), phosphorus (P), and potassium (K) addition once a year from 2014 to 2016. Compared to the control treatment of no additional fertilizer, we found that, (1) The fertilization combination of N (274 kg ha(-1)), P (350 kg ha(-1)), and K (57 kg ha(-1)) had a greater effect on biomass after the third year of fertilizer addition; (2) Gramineae accounted for a major portion of biomass in 2016, whereas the proportion of other species declined or disappeared; and (3) the longer the fertilization treatments went on, the lower Shannon diversity and Pielou's evenness turned out to be. All these responses are strongly interrelated in a cascade of changes. The interrelationships between fertilizers and different plant communities attribute the change not only to climate shift but also to time.
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