Gas exchange, nitrate assimilation and dry-matter accumulation ofTheobroma cacaoseedlings submitted to different irradiances and nitrogen levels

2001 ◽  
Vol 76 (2) ◽  
pp. 224-230 ◽  
Author(s):  
L. C. Do Costa ◽  
F. De Almeida ◽  
R.R. Valle
Keyword(s):  
Gas Exchange ◽  
Dry Matter ◽  
Nitrate Assimilation ◽  
Dry Matter Accumulation ◽  
Nitrogen Levels

scholarly journals Responses of Root Characteristic Parameters and Plant Dry Matter Accumulation, Distribution and Transportation to Nitrogen Levels for Spring Maize in Northeast China

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 308
Author(s):  
Yang Yu ◽  
Chunrong Qian ◽  
Wanrong Gu ◽  
Caifeng Li
Keyword(s):  
Surface Area ◽  
Nitrogen Fertilizer ◽  
Root Length ◽  
Dry Matter ◽  
Projection Area ◽  
Dry Matter Accumulation ◽  
Characteristic Parameters ◽  
High Nitrogen ◽  
Nitrogen Levels ◽  
Matter Transport

Improving nitrogen use efficiency is a significant scientific problem to be solved. Two maize hybrids JD27 (Jidan 27) and SD19 (Sidan 19) were selected to study the effects of nitrogen levels on root characteristic parameters and plant dry matter accumulation, distribution and transportation. We set five different nitrogen levels, which were nitrogen deficiency (000N), low nitrogen (075N), medium nitrogen (150N), high nitrogen (225N) and excessive nitrogen (300N). The results showed that the root length and root surface area of JD27 were significantly higher than those of SD19 under 075N. With the increase of nitrogen levels, the root difference among varieties gradually decreased. The root length, projection area, total surface area and total volume reached the maximum values at silking stage. The average root diameter kept stable or decreased slowly with the growth stage. The dry matter accumulation of JD27 was higher than that of SD19 at all growth stages. Increasing the amount of nitrogen fertilizer can promote the transport of dry matter to grain and improve dry matter transport efficiency after anthesis. Under the treatment of medium and high nitrogen fertilizer, maize was easy to obtain a higher yield, but excessive nitrogen fertilizer inhibited the increase of yield. This study provides theoretical and practical guidance for maize production techniques.

Gas exchange characteristics and dry matter accumulation of soybean treated with Nod factors

2007 ◽  
Vol 164 (10) ◽  
pp. 1391-1393 ◽  
Author(s):  
Juan Jose Almaraz ◽  
Xiaomin Zhou ◽  
Alfred Souleimanov ◽  
Donald Smith
Keyword(s):  
Gas Exchange ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Nod Factors ◽  
Gas Exchange Characteristics

scholarly journals Effect of biostimulants on dry matter accumulation and gas exchange in plantain plants (Musa AAB)

2019 ◽  
Vol 13 (2) ◽  
pp. 151-160
Author(s):  
Diana Mateus-Cagua ◽  
Gustavo Rodríguez-Yzquierdo
Keyword(s):  
Gas Exchange ◽  
Dry Matter ◽  
Photosynthetic Activity ◽  
Leaf Gas Exchange ◽  
Block Design ◽  
Dry Matter Accumulation ◽  
Vegetative Phase ◽  
Physiological Processes ◽  
Randomized Complete Block Design ◽  
Positive Effect

Biostimulants can potentially improve plant growth and development, modifying physiological processes. This study evaluated the effect of four biostimulants on the growth of ‘Hartón’ plantain plants and the leaf gas exchange during the vegetative phase. This experiment was developed on a plantain farm’s nursery in Fuente de Oro (Colombia) with a randomized complete block design with four replicates. The treatments were the biostimulants: Bactox WP®: Bacillus subtilis (Bs); Baliente®: Bacillus amyloliquefaciens (Ba); Tierra Diatomeas®: silicon dioxide (Si); Re-Leaf®: salicylic acid (SA) and the control (water). All products had a positive effect on the accumulation of total dry matter (DM) (between 58.4 and 21.9%) and on the photosynthetic activity (a maximum of 110 and 24.3% in first and second evaluation), as compared to the control, while no differences were found (P>0.05) for the foliar emission rate and chlorophyll content between the treatments. The plants treated with Bs had the greatest DM accumulation at the end of the study and a constant, high photosynthetic activity. All the while Bs, Ba and Si managed to stimulate greater early photosynthetic activity. According to the results, the use of these biostimulants during the vegetative phase had an effect on the physiological processes that enhance DM accumulation in plantain plants, which could be potentially useful for the transplanting stage and increase the reserves used during their establishment and development in the field.

Gas Exchange and Dry Matter Accumulation during Leaf Development

1985 ◽  
pp. 157-216 ◽  
Author(s):  
Ingrid Tichá ◽  
J. Čatský ◽  
Damuše Hodáňová ◽  
Jana Pospišilivá ◽  
M. Kaše ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Leaf Development ◽  
Dry Matter ◽  
Dry Matter Accumulation

Leaf gas exchange, chloroplastic pigments and dry matter accumulation in castor bean (Ricinus communis L) seedlings subjected to salt stress conditions

2008 ◽  
Vol 27 (3) ◽  
pp. 385-392 ◽  
Author(s):  
Hugo Alves Pinheiro ◽  
José Vieira Silva ◽  
Laurício Endres ◽  
Vilma Marques Ferreira ◽  
Celene de Albuquerque Câmara ◽  
...  
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Castor Bean ◽  
Dry Matter ◽  
Ricinus Communis ◽  
Leaf Gas Exchange ◽  
Stress Conditions ◽  
Dry Matter Accumulation ◽  
Ricinus Communis L ◽  
Chloroplastic Pigments

scholarly journals Influence of priming and nitrogen on growth behavior of buckwheat (Fagopyrum esculentum) in rainfed condition of midhill in Nepal

2018 ◽  
pp. 47-54
Author(s):  
J. J. Gairhe ◽  
T. N. Bhusal ◽  
H. Neupane
Keyword(s):  
Moisture Content ◽  
Grain Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Seed Priming ◽  
Germination Percentage ◽  
Dry Matter Accumulation ◽  
Straw Yield ◽  
Nitrogen Levels ◽  
Gm Plant

 An experiment was conducted during winter, 2010/11 at IAAS, Lamjung with the objective of studying effect of seed priming and nitrogen levels on yield and yield attributing characters of buckwheat. Altogether, there were 9 treatments of seed priming hours (0, 18 and 36) combined with nitrogen levels (30, 45 and 60 kg/ha). The experiment was laid out in randomized complete block design and each treatment was replicated thrice. The seed priming of 36 hours had resulted in significantly higher germination percentage in both 15 days after sowing (DAS) (4.40%) and 30 (DAS) (5.74%) The total germination percentage was also significantly higher (48.4%) with 36 hr seed priming. The main and interaction effects of seed priming and nitrogen levels had significant influence on days to 50% flowering. The dry biomass per plant, grain yield, straw yield, harvest index and percentage moisture content of biomass at harvest were found non-significantly different due to seed priming and nitrogen levels. The highest value for dry matter accumulation per plant (5.24 gm/plant), straw yield (8706 kg/ha) and % moisture content (71.0%) was recorded with 36 hr seed priming whereas the highest value for grain yield (1599 kg/ha), and harvest index (19.8) was obtained with 18 hr seed priming. Likewise, dry matter accumulation (5.38 gm/plant), grain yield (1575 kg/ha) and harvest index (22.0) was found highest in 45 kg N/ha. Similarly, the straw yield (9153 kg/ha) and % moisture content (75.3%) was found highest in the treatment with 60 kg N/ha. The interaction effect between nitrogen level and priming was found non-significant and the highest grain yield (2091 kg/ha) was obtained from 18 hr seed priming with 45 kg N/ha. Phosphorus consumption rate was intrestingly higher in buckwheat plot with nitrogen application. Moderate consumption of potassium was also observed while nitrogen content in soil remain apparantly unchanged and similar was the case with soil pH and organic matter content. Application of phosphatic fertilizer would be benefitial for buckwheat cultivation. Further experiment should be done to verify the effective dose of fertilizer.Journal of the Institute of Agriculture and Animal Science. Vol. 33-34, 2015, Page: 47-54

Population differences in water-use efficiency of well-watered and water-stressed western larch seedlings

1994 ◽  
Vol 24 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Jianwei Zhang ◽  
John D. Marshall
Keyword(s):  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Dry Matter ◽  
Genotypic Differences ◽  
Dry Matter Accumulation ◽  
Population Differences ◽  
Western Larch ◽  
Use Efficiency

Gas exchange, water-use efficiency (WUE), and carbon-isotope discrimination (Δ) were compared among 14 populations of western larch (Larixoccidentalis Nutt.), a deciduous conifer. Seedlings grown from seed collected across the natural distribution of the species were maintained under water-stressed and well-watered conditions. No differences in gas exchange or instantaneous water-use efficiency (WUEi) were detected among populations. However, population differences in Δ, a second measure of water-use efficiency, were observed. WUE measured as the rate of dry matter accumulation per cumulative water transpired (WUET) was different among populations at the P = 0.07 level. The three measures of WUE were intercorrelated and all were higher among water-stressed seedlings than among well-watered seedlings. Overall means were 4.30 ± 0.08 (± SE) and 3.61 ± 0.07 g dry matter accumulation per kg water transpired (WUET), 2.80 ± 0.09 and 2.02 ± 0.06 μmol CO2 uptake per μmol H2O transpired (WUEi), and Δ was 18.24 ± 0.08‰ and 20.26 ± 0.10‰ under the water-stressed and well-watered treatments, respectively. Population differences in the two integrated measurements, WUET and Δ, were significantly correlated with the altitude at which seed was collected. No interaction between genotype and watering treatment was observed, which means that despite pronounced shifts in WUE between watering treatments, population rankings remained unchanged. These results provide evidence of genotypic differences in long-term measures of WUE among native populations of western larch.

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