scholarly journals Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

2021 ◽  
Author(s):  
Lei Su ◽  
Mengzhou Liu ◽  
Chengming You ◽  
Qun Guo ◽  
Zhongmin Hu ◽  
...  
Keyword(s):  
Seed Production ◽  
Dominant Species ◽  
Temperate Steppe ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition

scholarly journals Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

2021 ◽  
Author(s):  
Lei Su ◽  
Mengzhou Liu ◽  
Chengming You ◽  
Qun Guo ◽  
Zhongmin Hu ◽  
...  
Keyword(s):  
Seed Production ◽  
Nutrient Enrichment ◽  
Plant Density ◽  
N Availability ◽  
P Availability ◽  
N Addition ◽  
Temperate Steppe ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition ◽  
P Addition

Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but how investigations of such responses to multiple levels of nutrient enrichment remains unclear. In this study, we manipulated nitrogen (N) and phosphorus (P) availability to examine seed production responses to three levels each of N and P addition in a factorial experiment: no N addition (0 g N m-2 yr-1), low N addition (10 g N m-2 yr-1), high N addition (40 g N m-2 yr-1), and no P addition (0 g P m-2 yr-1), low P addition (5 g P m-2 yr-1), high P addition (10 g P m-2 yr-1). Low N addition enhanced seed production by 814%, 1371%, and 1321% under ambient, low, and high P addition levels, respectively. High N addition increased seed production by 2136%, 3560%, and 3550% under ambient, low, and high P addition levels, respectively. However, P addition did not affect seed production in the absence of N addition, but it did enhance it under N addition. Furthermore, N addition enhanced seed production mainly by increasing the tiller number and inflorescence abundance per plant, whereas P addition stimulated it by decreasing the plant density yet stimulating height of plants and their seed number per inflorescence. Our results indicate seed production is limited not by P but rather by N in the temperate steppe, whereas seed production will be increased by P addition when N availability is improved. These findings enable a better understanding of plant reproduction dynamics of steppe ecosystems under intensified nutrient enrichment and can inform their improved management in the future.

scholarly journals Effects of Increased Nitrogen and Phosphorus Deposition on Offspring Performance of Two Dominant Species in a Temperate Steppe Ecosystem

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yang Li ◽  
Longyu Hou ◽  
Bing Song ◽  
Liuyi Yang ◽  
Linghao Li
Keyword(s):  
Dominant Species ◽  
Temperate Steppe ◽  
Nitrogen And Phosphorus ◽  
Offspring Performance ◽  
Steppe Ecosystem

Effects of long-term nitrogen and phosphorus addition on plant defence compounds in a freshwater wetland

2018 ◽  
Vol 94 ◽  
pp. 1-6 ◽  
Author(s):  
Liping Shan ◽  
Changchun Song ◽  
Xinhou Zhang ◽  
Jiusheng Ren
Keyword(s):  
Plant Defence ◽  
Freshwater Wetland ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition

The effects of frequency and extent of defoliation, summer irrigation, and fertilizer on the production and survival of the grass Danthonia caespitosa Gaud

1976 ◽  
Vol 27 (6) ◽  
pp. 755 ◽  
Author(s):  
KC Hodgkinson
Keyword(s):  
Seed Production ◽  
Death Rate ◽  
Field Experiments ◽  
Seed Set ◽  
Floral Induction ◽  
Early Winter ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Plant Survival ◽  
Growth And Survival

The effects of extent and frequency of defoliation on the growth and survival of Danthonia caespitosa were measured in a series of field experiments. Additional treatments, of summer irrigation and application of nitrogen and phosphorus fertilizer, were included in some of the experiments to assess how they modified the effects of defoliation. During the summer, complete defoliation increased the shoot yield of plants which had not been irrigated, but yield was decreased in the irrigated treatments. Frequent, partial defoliation increased yields of irrigated plants but decreased yields of plants not irrigated. Depression of yields was caused by both tiller death and reduced regrowth of individual tillers. In an experiment lasting 2 years, plants were completely defoliated monthly, bimonthly or tri-monthly or left intact, and shoot yields, tillering characteristics and plant survival under the treatments were compared. Monthly defoliation depressed yields and rate of tillering and accelerated the death rate of plants, particularly during the summer and autumn periods. Plants also died when cut bimonthly but the rate was slower. Plants irrigated during the first summer generally died at a faster rate than plants not irrigated. Tillering was more rapid during the autumn and early winter months. Midwinter application of fertilizer to plants cut bimonthly greatly stimulated shoot yields and seed production in the spring but not in the following year. Examination of tiller apices showed that floral induction took place prior to the beginning of July. Many apices were elevated above the 'grazing level' by early September, and flowering and seed set occurred in October.

scholarly journals Plant and microbial responses to nitrogen and phosphorus addition across an elevational gradient in subarctic tundra

Ecology ◽  
2014 ◽  
Vol 95 (7) ◽  
pp. 1819-1835 ◽  
Author(s):  
Maja K. Sundqvist ◽  
Zhanfeng Liu ◽  
Reiner Giesler ◽  
David A. Wardle
Keyword(s):  
Elevational Gradient ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition ◽  
Microbial Responses

scholarly journals Effects of Experimental Nitrogen and Phosphorus Addition on Litter Decomposition in an Old-Growth Tropical Forest

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e84101 ◽  
Author(s):  
Hao Chen ◽  
Shaofeng Dong ◽  
Lei Liu ◽  
Chuan Ma ◽  
Tao Zhang ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Litter Decomposition ◽  
Nitrogen And Phosphorus ◽  
Old Growth ◽  
Phosphorus Addition

Effect of nitrogen and phosphorus addition on soil aggregation and its associated organic carbon

2021 ◽  
pp. 1-13
Author(s):  
Ye Yuan ◽  
Shan Gao ◽  
Xiaoqin Dai ◽  
Fusheng Chen ◽  
Huimin Wang
Keyword(s):  
Organic Carbon ◽  
Soil Aggregation ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition

Effects of nitrogen and phosphorus addition on soil microbial community characteristics in a subtropical evergreen broadleaved forest

2017 ◽  
Vol 37 (24) ◽  
Author(s):  
王晶晶 WANG Jingjing ◽  
樊伟 FAN Wei ◽  
崔珺 CUI Jun ◽  
许崇华 XU Chonghua ◽  
王泽夫 WANG Zefu ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Community Characteristics ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition ◽  
Evergreen Broadleaved Forest ◽  
Soil Microbial

Contrasting species responses to continued nitrogen and phosphorus addition in tropical montane forest tree seedlings

Biotropica ◽  
2017 ◽  
Vol 50 (2) ◽  
pp. 234-245 ◽  
Author(s):  
Daisy Cárate-Tandalla ◽  
Tessa Camenzind ◽  
Christoph Leuschner ◽  
Jürgen Homeier
Keyword(s):  
Forest Tree ◽  
Montane Forest ◽  
Tropical Montane Forest ◽  
Tree Seedlings ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Addition ◽  
Species Responses
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