scholarly journals The Composition of Nitrogen-Fixing Microorganisms Correlates With Soil Nitrogen Content During Reforestation: A Comparison Between Legume and Non-legume Plantations

2019 ◽  
Vol 10 ◽  
Author(s):  
Jie Chen ◽  
Weijun Shen ◽  
Han Xu ◽  
Yide Li ◽  
Tushou Luo
Keyword(s):  
Nitrogen Content ◽  
Soil Nitrogen ◽  
Nitrogen Fixing

Soil nitrogen accretion along a floodplain terrace chronosequence in northwest Alaska: Influence of the nitrogen-fixing shrub Shepherdia canadensis

Ecoscience ◽  
2008 ◽  
Vol 15 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Charles Rhoades ◽  
Dan Binkley ◽  
Hlynur Oskarsson ◽  
Robert Stottlemyer
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Fixing ◽  
Shepherdia Canadensis

Nitrogen-fixing and non-fixing trees differ in leaf chemistry and defence but not herbivory in a lowland Costa Rican rain forest

2019 ◽  
Vol 35 (6) ◽  
pp. 270-279
Author(s):  
Benton N. Taylor ◽  
Laura R. Ostrowsky
Keyword(s):  
Nitrogen Content ◽  
Rain Forest ◽  
Chemical Defence ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Nitrogen Fixing ◽  
Leaf Toughness ◽  
High Productivity ◽  
Nitrogen Fixers ◽  
Nitrogen Inputs

AbstractNitrogen-fixing plants provide critical nitrogen inputs that support the high productivity of tropical forests, but our understanding of the ecology of nitrogen fixers – and especially their interactions with herbivores – remains incomplete. Herbivores may interact differently with nitrogen fixers vs. non-fixers due to differences in leaf nitrogen content and herbivore defence strategies. To examine these potential differences, our study compared leaf carbon, nitrogen, toughness, chemical defence and herbivory for four nitrogen-fixing tree species (Inga oerstediana, Inga sapindoides, Inga thibaudiana and Pentaclethra macroloba) and three non-fixing species (Anaxagorea crassipetala, Casearia arborea and Dipteryx panamensis) in a lowland tropical rain forest. Leaf chemical defence, not nutritional content, was the primary driver of herbivore damage among our species. Even though nitrogen fixers exhibited 21.1% higher leaf nitrogen content, 20.1% lower C:N ratios and 15.4% lower leaf toughness than non-fixers, we found no differences in herbivory or chemical defence between these two plant groups. Our results do not support the common hypotheses that nitrogen fixers experience preferential herbivory or that they produce more nitrogen-rich defensive compounds than non-fixers. Rather, these findings suggest strong species-specific differences in plant–herbivore relationships among both nitrogen-fixing and non-fixing tropical trees.

Higher relative performance at low soil nitrogen and moisture predicts field distribution of nitrogen-fixing plants

2012 ◽  
Vol 359 (1-2) ◽  
pp. 363-374 ◽  
Author(s):  
Adrian Monks ◽  
Ellen Cieraad ◽  
Larry Burrows ◽  
Susan Walker
Keyword(s):  
Field Distribution ◽  
Soil Nitrogen ◽  
Relative Performance ◽  
Nitrogen Fixing

Exposure to aphids increases alder growth and nitrogen fixation

Botany ◽  
2011 ◽  
Vol 89 (4) ◽  
pp. 255-261 ◽  
Author(s):  
Corinthe Zekveld ◽  
John Markham
Keyword(s):  
Soil Nitrogen ◽  
Plant Nutrition ◽  
Soil Microbes ◽  
Nitrogen Fixing ◽  
Root:Shoot Ratio ◽  
Herbivore Damage ◽  
Resistance Response ◽  
Nitrogen Levels ◽  
Alnus Viridis ◽  
Low Nitrogen

Plants can respond to herbivore damage by mounting a resistance response or by compensating for lost fitness. Both plant nutrition and interactions with soil microbes can affect these responses. It has been shown that resistance responses can occur before plants have been attacked by herbivores. Here we show that a tolerance type of response can occur when plants are exposed to, but not fed on by, herbivores. Alnus viridis (Chaix) DC. spp. crispa (Ait.) Turrill were grown in sealed containers under positive air pressure with either 0.5 mmol·L–1 or 2.0 mmol·L–1 nitrate and either inoculated or not inoculated with Frankia , their nitrogen-fixing symbiont. Plants were then exposed to the genus-specific aphid Prociphilus tessallatus Fitch, which failed to establish feeding colonies. Exposure to aphids, formation of nitrogen-fixing nodules, and elevated soil nitrogen levels all significantly increased plant yield with no interaction among these factors. A combination of high soil nitrogen, nodulation, and exposure to aphids resulted in the lowest plant root:shoot ratio. Plants that were grown with low nitrogen and were exposed to aphids showed increased nitrogen-fixing activity within a day of being exposed. These results provide further evidence to support the observation that plants can respond to cues from other organisms prior to receiving herbivore damage.

Interaction of Mesorhizobia, Vesicular Arbuscular Mycorrhiza and different Chickpea (Cicer arietinum L.) Genotypes for Nitrogen Fixing and Yield Attributing traits

2017 ◽  
Vol 40 (04) ◽  
Author(s):  
Minakshi Kalkal ◽  
Krishan Kumar ◽  
Radhey Sham Waldia ◽  
Surjit Singh Dudeja
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Nitrogen Content ◽  
Block Design ◽  
Dry Weight ◽  
Nitrogen Fixing ◽  
Vesicular Arbuscular Mycorrhiza ◽  
Shoot Dry Weight ◽  
Randomized Block Design ◽  
Vesicular Arbuscular ◽  
Uninoculated Control

Twenty genotypes of chickpea were evaluated to study the interaction of chickpea genotypes, mesorhizobial strains and vesicular arbuscular mycorrhiza for 14 nitrogen fixing and yield attributing traits viz. days to 50% flowering, days to maturity, plant height (cm), number of branches per plant, number of pods per plant, 100 seed weight (g), seed yield per plant (g), number of nodules per plant, nodule weight per plant (g), root dry weight per plant (g), shoot dry weight per plant (g), nitrogen content in shoot (%), nitrogen content in grain (%) and VAM infection(%). The analysis of variance revealed the existence of significant amount of genetic variability in the material for all the traits. All the genotypes were treated with three treatments separately (Mesorhizobium sp. Strain CH 1233 (S1); Mesorhizobium sp. Strain CH 810 (S2); vesicular arbuscular mycorrhiza (VAM) (Glomus fasiculatum) and one set was used as uninoculated control. These were grown separately following randomized block design with three replications in each treatment. Comparative analysis indicated the differences between the treatments and behaviour of the genotypes in different environments. In general S1 and VAM showed beneficial interaction for maximum number of traits for all the genotypes. The effect of VAM was the most apparent among treatments. On overall basis, genotypes viz. HC 3, HC 5, GL 94022, ICC 5003LN, HK 2, GNG 663 and BG 362 were observed to be better performing and responsive to bio inoculants having one or more superior traits. These genotypes performing better for specific traits can be used as parents in hybridization programme for improvement of that particular trait.

Variations and Typical Impact Factors of Soil Nitrogen Content during the Vegetation Succession in Limestone Mountains

2013 ◽  
Vol 664 ◽  
pp. 142-145
Author(s):  
Shan Shan Zhang ◽  
Li Yuan Yang ◽  
Hui Wang ◽  
Qing Lin Chen ◽  
Qian Li
Keyword(s):  
Organic Carbon ◽  
Nitrogen Content ◽  
Total Nitrogen ◽  
Soil Nitrogen ◽  
Mineral Soil ◽  
Impact Factors ◽  
Organic Carbon Content ◽  
Soil Mineral Nitrogen ◽  
Platycladus Orientalis ◽  
Positive Correlations

In order to explore the variations and impact factors of soil nitrogen contents, 0-20 cm mineral soil under herb, shrub, Platycladus orientalis plantation of limestone mountains after restoration for 5 years and 10 years were collected and examined in Jinan, Shandong province. The results showed that there was different soil mineral nitrogen content under different vegetation during the natural succession and artificial restoration succession. Shrub community (14.35 mg/Kg) > herb community (12.73 mg/Kg); Platycladus orientalis plantation restored for 10 years (27.82 mg/Kg) > Platycladus orientalis plantation restored for 5 years (20.76 mg/Kg). NO3--N has highly significant positive correlations with soil organic carbon and total nitrogen content (r = 0.626, 0.564, p 4+-N has not significantly correlated with total nitrogen and organic carbon content (r = 0.218, 0.155). However, it has highly significant positive correlation with the NO3--N (r = 0.531, p 3--N and NH4+-N have highly significant negative correlations with soil pH (r = -0.657, -0.605, p < 0.01), respectively. But the correlation with the soil moisture was not significant (r = -0.181, 0.114). The research provided base information for the evaluation of restoration effects and restoration practice on the limestone mountains.

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