Heavy Livestock Grazing Promotes Locust Outbreaks by Lowering Plant Nitrogen Content

Science ◽  
2012 ◽  
Vol 335 (6067) ◽  
pp. 467-469 ◽  
Author(s):  
A. J. Cease ◽  
J. J. Elser ◽  
C. F. Ford ◽  
S. Hao ◽  
L. Kang ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Livestock Grazing ◽  
Plant Nitrogen

scholarly journals Pay it forward: refuse dump from leaf-cutting ants promotes caterpillar digestive performance by increasing plant nitrogen content

2018 ◽  
Vol 44 (1) ◽  
pp. 40-49
Author(s):  
Maria Natalia Lescano ◽  
Carolina Quintero ◽  
Alejandro Gustavo Farji-Brener ◽  
Esteban Balseiro
Keyword(s):  
Nitrogen Content ◽  
Plant Nitrogen ◽  
Refuse Dump ◽  
Leaf Cutting

DRY MATTER AND NITROGEN ACCUMULATION AND REDISTRIBUTION AND THEIR RELATIONSHIP TO GRAIN YIELD AND GRAIN PROTEIN IN WHEAT

1988 ◽  
Vol 68 (2) ◽  
pp. 311-322 ◽  
Author(s):  
PATRICK M. McMULLAN ◽  
PETER B. E. McVETTY ◽  
AILEEN A. URQUHART
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Harvest Index ◽  
Dry Matter ◽  
Triticum Aestivum L ◽  
Plant Nitrogen ◽  
Nitrogen Harvest Index ◽  
Grain Nitrogen ◽  
Highly Correlated ◽  
Nitrogen Harvest

Dry matter and nitrogen (nitrate and reduced) accumulation and redistribution in four different spring wheat (Triticum aestivum L.) genotypes grown at field density were studied on a plant part and whole plant basis over the growing season for 2 yr. The four cultivars displayed significant differences in plant part and total plant dry matter, harvest index, nitrogen content, nitrogen concentration, nitrogen harvest index and nitrogen translocated values at most sample dates in both years. Grain yield was highly correlated with dry matter accumulation (r = 0.88**), while grain nitrogen content was highly correlated with plant nitrogen content (r = 0.95**). Nitrogen harvest index and plant nitrogen content were correlated at anthesis (r = 0.61**), while, as a consequence of this, the amount of nitrogen translocated was highly correlated with plant nitrogen content at anthesis (r = 0.87**). Nitrogen harvest index and harvest index were highly correlated (r = 0.83**), indicating that they may be related processes. Since plant dry matter and plant nitrogen content were not significantly correlated, it should be possible to select simultaneously for these traits to effect grain yield and grain nitrogen content increases on a per-plant basis. Further research will have to be done to determine how these changes will relate to grain nitrogen concentrations and grain yield per unit area.Key words: Wheat, dry matter, nitrogen, yield, protein, Triticum aestivum L.

scholarly journals Plant DNA methylation is sensitive to parent seed N content and influences the growth of rice

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiaoru Fan ◽  
Laihua Liu ◽  
Kaiyun Qian ◽  
Jingguang Chen ◽  
Yuyue Zhang ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Plant Growth ◽  
Nitrogen Content ◽  
Nitrogen Stress ◽  
Wild Type ◽  
High Nitrogen ◽  
N Content ◽  
Plant Nitrogen ◽  
Overexpression Line ◽  
N Deficiency

Abstract Background Nitrogen (N) is an important nutrient for plant growth, development, and agricultural production. Nitrogen stress could induce epigenetic changes in plants. In our research, overexpression of the OsNAR2.1 line was used as a testing target in rice plants with high nitrogen-use efficiency to study the changes of rice methylation and growth in respond of the endogenous and external nitrogen stress. Results Our results showed that external N deficiency could decrease seed N content and plant growth of the overexpression line. During the filial growth, we found that the low parent seed nitrogen (LPSN) in the overexpression line could lead to a decrease in the filial seed nitrogen content, total plant nitrogen content, yield, and OsNAR2.1 expression (28, 35, 23, and 55%, respectively) compared with high parent seed nitrogen (HPSN) in high nitrogen external supply. However, such decreases were not observed in wild type. Furthermore, methylation sequencing results showed that LPSN caused massive gene methylation changes, which enriched in over 20 GO pathways in the filial overexpression line, and the expression of OsNAR2.1 in LPSN filial overexpression plants was significantly reduced compared to HPSN filial plants in high external N, which was not shown in wild type. Conclusions We suggest that the parent seed nitrogen content decreased induced DNA methylation changes at the epigenetic level and significantly decreased the expression of OsNAR2.1, resulting in a heritable phenotype of N deficiency over two generations of the overexpression line.

Improving in vivo plant nitrogen content estimates from digital images: Trueness and precision of a new approach as compared to other methods and commercial devices

2015 ◽  
Vol 135 ◽  
pp. 21-30 ◽  
Author(s):  
Roberto Confalonieri ◽  
Livia Paleari ◽  
Ermes Movedi ◽  
Valentina Pagani ◽  
Francesca Orlando ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Digital Images ◽  
New Approach ◽  
Plant Nitrogen

DRY MATTER AND NITROGEN ACCUMULATION AND REDISTRIBUTION AND THEIR RELATIONSHIP TO GRAIN YIELD AND GRAIN PROTEIN IN OATS

1988 ◽  
Vol 68 (4) ◽  
pp. 983-993 ◽  
Author(s):  
PATRICK M. McMULLAN ◽  
PETER B. E. McVETTY ◽  
AILEEN A. URQUHART
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Harvest Index ◽  
Dry Matter ◽  
Plant Part ◽  
Plant Nitrogen ◽  
Grain Nitrogen ◽  
Highly Correlated ◽  
Nitrogen Harvest ◽  
Plant Basis

Dry matter and nitrogen (nitrate and reduced) accumulation and redistribution in four different spring oat (Avena sativa L.) genotypes grown at commercial field density were studied on a plant part and whole plant basis over the growing season for 2 yr. The four cultivars displayed significant differences in plant part and total plant dry matter, harvest index, nitrogen content, nitrogen concentration, nitrogen harvest index, and nitrogen translocated values at most sample dates in both years. Grain yield per plant was correlated with dry matter accumulation (r = 0.80*). Harvest index was highly correlated with grain yield per plant (r = 0.88**). Grain nitrogen content was highly correlated with plant nitrogen content (r = 0.94**). Nitrogen harvest index and harvest index were highly correlated (r = 0.86**), indicating that they may be related processes. Since plant dry matter and plant nitrogen content were not significantly correlated, it should be possible to select simultaneously for these traits to effect grain yield and grain nitrogen content increases on a per plant basis. Further research will have to be done to determine how these changes will relate to grain nitrogen concentrations and grain yield per unit area.Key words: Avena sativa L., oat, dry matter, nitrogen, yield, protein

Rhizobial inoculant formulations and soil pH influence field pea nodulation and nitrogen fixation

2000 ◽  
Vol 80 (3) ◽  
pp. 395-400 ◽  
Author(s):  
W. A. Rice ◽  
G. W. Clayton ◽  
P. E. Olsen ◽  
N. Z. Lupwayi
Keyword(s):  
Nitrogen Content ◽  
Soil Ph ◽  
Crop Production ◽  
Plant Biomass ◽  
Acid Soil ◽  
Dry Weight ◽  
Field Pea ◽  
Total Biomass ◽  
Plant Nitrogen ◽  
Liquid Inoculant

Crop production systems that include field pea (Pisum sativum L.) in rotation are important for sustainable agriculture on acid soils in northwestern Canada. Greenhouse experiments were conducted to compare the ability of liquid inoculant applied to the seed, powdered peat inoculant applied to the seed, and granular inoculant applied in a band with the seed to establish effective nodulation on field pea grown at soil pH(H2O) 4.4, 5.4 and 6.6. Plants were grown to the flat pod stage, and then total plant biomass dry weight, dry weight of nodules, number of nodules, plant nitrogen content, and proportion of plant nitrogen derived from the atmosphere (%Ndfa) were measured. Granular and powdered peat inoculants produced greater nodule numbers and weight, plant nitrogen content, %Ndfa and total biomass than liquid inoculant in at least two of the three experiments. Only granular inoculant was effective in establishing nodules at soil pH 4.4, but granular and powdered peat inoculants were effective at pH 5.4, and all three formulations were effective at pH 6.6. The results showed that granular inoculant has potential for effective nodulation of field pea grown on acid soil. Key words: Rhizobium, inoculant formulations, field pea, nodulation, acid soil

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