Seedling Growth Characteristics of 24 Provenances of Larix principis-rupprechtii

2014 ◽  
Vol 1073-1076 ◽  
pp. 1099-1103
Author(s):  
Guo Jun Zhang ◽  
Cheng He Wang ◽  
Min Hua Zhao ◽  
Wan Qi Wang ◽  
Jun Ming Yang
Keyword(s):  
Seedling Growth ◽  
Root Length ◽  
Growth Traits ◽  
Comprehensive Evaluation ◽  
Correlation Coefficients ◽  
Growth Characteristics ◽  
Fresh Weight ◽  
Basal Diameter ◽  
Membership Value

Seedling growth traits of 24 provenances of Larix principis-rupprechtii were analyzed to select superior provenances. Variance and correlation on height, basal diameter, root length, root and stem fresh weight of 1-year old and 2-year old seedlings of those provenances were analyzed. Then correlation coefficients between these growth traits and membership value of height and basal diameter of 24 provenances were carried on. Results showed that variance on growth traits of 1-year old seedlings among 24 provenances were only significant for height, but for basal diameter, height, root and stem fresh weight of 2-year old seedlings. Based on correlation coefficients between growth traits, height and basal diameter were selected for comprehensive evaluation. The top 5 provenances of Larix principis-rupprechtii were Neimeng Balinzuo, Hebei Weichang 1-21, 7-46, 8-75, and Beijing, according to average of membership value of height and basal diameter.

scholarly journals Role of seed priming in improving seed germination and seedling growth of maize (Zea mays L.) under rain fed condition

2019 ◽  
Vol 2 (1) ◽  
pp. 265-273 ◽  
Author(s):  
Avinash Shrestha ◽  
Shreena Pradhan ◽  
Jenny Shrestha ◽  
Mahesh Subedi
Keyword(s):  
Seedling Growth ◽  
Root Length ◽  
Growth Traits ◽  
Block Design ◽  
Seed Priming ◽  
Urea Solution ◽  
Common Salt ◽  
Root Weight ◽  
Seedling Vigour ◽  
Maize Varieties

Seed priming enhances early seed emergence and proper crop stand establishment which enables the crop to capture more soil moisture, nutrients, and solar radiation. An on-farm experiment was conducted in Okhaldhunga, Nepal to study the effect of six different priming treatments (50 millimoles common salt solution, 200 millimoles urea solution, 1 percent MOP solution, 2.5 times diluted urine, water, and control) on germination and growth of two maize varieties, Manakamana-3 and Nutan-IL60. The experiment was set up in factorial randomized complete block design with three replications. Various germination traits: germination percent, seedling vigour, germination index, mean germination time, and seedling growth traits: shoot length, root length, and dry root weight, were studied. Nitrogen-based (Urea and Urine) priming resulted the most desirable change for the studied traits. Nitrogen-based priming also had significant positive effect on stress tolerance related traits like root length and dry root weight.

scholarly journals A, The EXPLORING THE ALLELOPATHIC AND HERMETIC EFFECT OF KHATAMI (Altheae officinalis) ON EMERGENCE AND SEEDLING GROWTH OF RADISH (Raphanus sativus)

2021 ◽  
Vol 27 (3) ◽  
pp. 321-330
Author(s):  
Bilal Ahmad Khan
Keyword(s):  
Aqueous Extract ◽  
Seedling Growth ◽  
Root Length ◽  
Raphanus Sativus ◽  
Germination Percentage ◽  
Shoot Length ◽  
Fresh Weight ◽  
Germination Time ◽  
Shoot Fresh Weight ◽  
Mean Germination Time

Abstract Crop plants release biochemicals into surrounding environment that help in obtaining maximum yield of crop by acting bioherbicide at high concentration and plant growth hormone at low concentration. Therefore, this study was planned at Department of Agronomy in Weed Science Laboratory, University of Agriculture Faisalabad during Winter 2018 to evaluate the hermetic effects of Althaea officinalis L. (khatami) on vegetable crop Radish (Raphanus sativus) The experiments were laid out under completely randomized design (CRD) having three replications. The aqueous extracts of A. officinalis L. were used on radish different concentrations (2.5%, 5%, 10%, 20%, 40% and 80%). Data regarding seed germination and seedling growth (shoot length, root length, shoot fresh weight, root dry weigh) of radish were recorded using standard procedures. Results Reveals that the aqueous extract of A. officinalis at higher concentration (80%) act as bioherbicide and produced inhibitory effects on R. sativus result in Maximum time to 50% germination (4.68 days) and mean germination time (9.05 days) while minimum germination index (3.60), germination percentage (85.00%), shoot length (42.4 cm), root length (25.90 cm), shoot fresh weight (53.30 g) and root fresh weight (13.30 g). While at lower concentration (10%) it shows hermetic effect and produce maximum germination percentage (100.00%), shoot length (58.2 cm), root length (52.0 cm), shoot fresh weight (90.00g), root fresh weight (26.30 g) minimum time to complete 50% germination (3.36 days), germination index (6.00%) and mean germination time (5.73 days) growth. In A. officinalis among different phenolic compound minimum Syringic acid (0.60%) and maximum Quercetion (12.3%) compound was found. Therefore, it was concluded from this study that aqueous extract of officinalis can be used as growth promoter at lower concentration while at higher concentration for environmentally friendly control of weeds.

ALLELOPATHIC INFLUENCE OF POPPY (Papaver somniferum L.) ON EMERGENCE AND INITIAL SEEDLING GROWTH OF RED RICE (Oryza punctata L.)

2020 ◽  
Vol 27 (2) ◽  
pp. 381-392
Author(s):  
Bilal Ahmad Khan ◽  
Muhammad Ather Nadeem ◽  
Sadia Afzal ◽  
Sadia Afzal ◽  
Muhammad Azim Khan ◽  
...  
Keyword(s):  
Aqueous Extract ◽  
Seedling Growth ◽  
Root Length ◽  
Dry Weight ◽  
Papaver Somniferum ◽  
Shoot Length ◽  
Red Rice ◽  
Fresh Weight ◽  
Plant Parts ◽  
Oryza Punctata

Allelopathy plays crucial role in effective weed control. Opium (Papaver somniferum L.) crop release different allelochemicals at maturity which have potential to act as natural weeds control in different crops. Phytotoxic effect of Papaver somniferum was examined on germination and initial seedling growth of red rice (Oryza punctata L.). Aqueous extract of different plant parts (leaves, stem and flower) were used at various concentrations (0.25%, 0.5%, 1%, 2%, 4% and 8%) along with distilled water as control. The aqueous extracts of leaves, stem and flower of P. somniferum were significantly inhibited the emergence, seedling growth as well as root length (cm), shoot length (cm), fresh weight (g) and dry weight (g) of O. punctata. Maximum mean emergence time (9.18 days) and minimum shoot length (1.13 cm) whereas minimum emergence index (0.89) and emergence percentage (6.67%) was observed under fruit extract at 8% concentration. P. somniferum aqueous extract of stem at 8% concentration take maximum time to complete 50% emergence minimum root length, fresh weight, dry weight of O. punctata. Based on this finding it can be concluded that the phyto-chemicals present in P. somniferum at 8% concentration may cause losses to the related as well as succeeding weeds through allelopathy and must be removed from the field to avoid destructive effects of these weeds.

scholarly journals The Influence of Salinity on Seedling Growth of Some Pumpkin Varieties Used as Rootstock

2013 ◽  
Vol 41 (1) ◽  
pp. 219 ◽  
Author(s):  
Rana KURUM ◽  
Kamile ULUKAPI ◽  
Köksal AYDINŞAKİR ◽  
Ahmet Naci ONUS
Keyword(s):  
Seedling Growth ◽  
Root Length ◽  
Dry Weight ◽  
Shoot Length ◽  
Stem Length ◽  
Fresh Weight ◽  
Shoot Fresh Weight ◽  
Root Dry Weight ◽  
Salinity Levels ◽  
Plant Length

In this study, the effects of different salinity levels (0, “control”, 2, 4, 8, and 12 dS m-1) on seedling growth of Obez, RS 841 and Ferro F1 pumpkin varieties, widely used around the world as rootstock, were investigated. Seedlings grown under saline conditions were investigated for plant main stem length, plant length, root length, shoot length, root fresh weight, root dry weight, shoot fresh weight, shoot dry weights and ion concentrations (Ca++, K+, Na+) in the leaves of pumpkin varieties. The results revealed that root length, shoot length, root fresh weight, root dry weight, shoot fresh weight and shoot dry weights tend to decrease when the electrical conductivity of the solution is increased. Results indicated that these varieties responded different to some investigated parameters under saline conditions.

Seed Germination and Seedling Growth Characteristics of Different Larix principis-rupprechtii Families

2014 ◽  
Vol 1073-1076 ◽  
pp. 1112-1116
Author(s):  
Guo Zhong Yue ◽  
Min Hua Zhao ◽  
Guo Jun Zhang ◽  
Wan Qi Wang ◽  
Jun Ming Yang
Keyword(s):  
Seed Germination ◽  
Seed Production ◽  
Seedling Growth ◽  
Growth Traits ◽  
Germination Rate ◽  
Seed Orchard ◽  
Phenotypic Traits ◽  
Photosynthetic Parameters ◽  
Planted Forest ◽  
Basal Diameter

Phenotypic traits (thousand seed weight and plumpness, etc.), germination characteristics (germination rate and nursery germination rate, etc.), growth traits (seedling height, basal diameter, root length, etc.) and photosynthetic parameters of 8 superior families and 3 controls (seed orchard, seed production stand and planted forest) were measured and analyzed to determine the difference of seed germination and seedling growth among Larix principis-rupprechtii families. Results showed that families 7-46, 8-74 and 1-30 performed excellent in aspects of germination index, nursery germination rate, height, basal diameter and photosynthetic rate. Their membership function value was 4-5 times higher than planted forest, 35%-70% higher than the seed orchard and seed production stand.

scholarly journals Enhancement in Bell Pepper (Capsicum annuum L.) Plants with Application of Roholtiella sp. (Nostocales) under Soilless Cultivation

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1624
Author(s):  
Adewale Suraj Bello ◽  
Imen Saadaoui ◽  
Talaat Ahmed ◽  
Helmi Hamdi ◽  
Maroua Cherif ◽  
...  
Keyword(s):  
Growth Rate ◽  
Capsicum Annuum ◽  
Seedling Growth ◽  
Root Length ◽  
Shoot Length ◽  
Bell Pepper ◽  
Fresh Weight ◽  
Capsicum Annuum L ◽  
Number Of Leaves ◽  
Soilless Cultivation

Cyanobacteria are found to be renewable and sustainable additives for growth improvement in crops. Extracts and biomass of three nitrogen-fixing cyanobacteria namely, Roholtiella sp. (QUCCCM97), Nostoc ellipsosporum (QUCCCM99), and Desmonostoc danxiaense (QUCCCM112) isolated from Qatar desert environment were tested for their ability to enhance the growth of bell pepper (Capsicum annuum L.) seedlings. Soilless cultivation experiments were carried out by applying the biomass and the aqueous extract of the three cyanobacteria separately. Seedlings were transplanted to Hoagland’s solution under regulated conditions. In total, 2, 4, and 6 mL L−1 of the three microalgae extract as well as 1 and 2 mg L−1 of the three microalgae biomasses (as biofertilizer) were added to the Hoagland solution. An assessment of seedling growth parameters such as shoot length, root length, fresh weight, dry weight, spad index, number of leaves per plant, and growth rate was performed. However, among the different doses and concentrations of investigated QUCCCM97, 99, and 112, our findings revealed that shoot length (cm), root length (cm), fresh weight (g), the number of leaves per plant, and growth rate were positively affected and significantly increased at maximum dose/concentration compared to control plants. With QUCCCM97, shoot length, root length, fresh weight, the number of leaves, and the growth rate increased by 17.5%, 40.3%, 26.0%, 21.6%, and 22.8%, respectively, compared to the control. Additionally, with QUCCCM99, the same parameters increased by 12.3%, 25.3%, 15.1%, 9.3%, 51.8%, respectively. While in presence of QUCCCM112, they increased by 8.7%, 30.1%, 15.6%, 5.4%, 48.6%, respectively. Our results demonstrated that extracts and biomass of cyanobacteria strains investigated here, and particularly Roholtiella sp. (Nostocales), have an enhancement potential of the seedling growth and could be used in modern agriculture to enhance productivity under the soilless system and ensure sustainability.

scholarly journals A, The Identifying the hermetic potential of khatami (Altheae officinalis) emergence and seedling growth of wild Pea (Pisum sativum subsp. elatius).

2021 ◽  
Vol 27 (3) ◽  
pp. 331-340
Author(s):  
Bilal Ahmad Khan ◽  
Rizwan Maqbool ◽  
Sumbal Parvez ◽  
Sumbal Parvez ◽  
Muhammad Ather Nadeem ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Aqueous Extract ◽  
Seedling Growth ◽  
Root Length ◽  
Germination Percentage ◽  
Shoot Length ◽  
Fresh Weight ◽  
Germination Time ◽  
Shoot Fresh Weight ◽  
Mean Germination Time

Crop plants release biochemicals into surrounding environment that help in obtaining maximum yield of crop by acting bioherbicide at high concentration and plant growth hormone at low concentration. Therefore, this study was planned at Department of Agronomy in Weed Science Laboratory, University of Agriculture Faisalabad during Winter 2018 to evaluate the allelopathic effects of A. officinalis on weed Wild Pea (Pisum sativum subsp. elatius). The experiments were laid out under completely randomized design (CRD) having three replications. The aqueous extracts of C. verum. were used on radish and wild pea seeds at different concentrations (2.5%, 5%, 10%, 20%, 40% and 80%). Data regarding seed germination and seedling growth (shoot length, root length, shoot fresh weight, root dry weigh) of weed were recorded following standard procedures. Results Reveals that the aqueous extract of A. officinalis at higher concentration (80%) act as bioherbicide and produced inhibitory effects on R. sativus result in Maximum time to 50% germination (6.70 days) and mean germination time (10.00 days) while minimum germination index (4.70), germination percentage (66.60%), shoot length (49.8 cm), root length (8.16 cm), shoot fresh weight (10.00g) and root fresh weight (10.361g). While at lower concentration (10%) it shows hermetic effect and produce maximum germination percentage (90.00%), shoot length (84.7 cm), root length (66.2 cm), shoot fresh weight (82.20 g), root fresh weight (58.30 g) and germination index (8.21%) minimum time to complete 50% germination (4.33 days) and mean germination time (5.49 days) growth. In A. officinalis among different phenolic compound minimum Syringic acid (0.60%) and maximum Quercetion (12.3%) compound was found. Therefore, it was concluded from this study that aqueous extract of officinalis can be used as growth promoter at lower concentration while at higher concentration for environmentally friendly control of weeds.

scholarly journals IAP-AACM v1.0： Global to regional evaluation of the atmospheric chemistry model in CAS-ESM

2018 ◽  
Author(s):  
Ying Wei ◽  
Xueshun Chen ◽  
Huansheng Chen ◽  
Jie Li ◽  
Zifa Wang ◽  
...  
Keyword(s):  
East Asia ◽  
Spatial Variation ◽  
Atmospheric Chemistry ◽  
Comprehensive Evaluation ◽  
Correlation Coefficients ◽  
Full Description ◽  
Atmospheric Physics ◽  
Temporal And Spatial Variability ◽  
Fine Mode ◽  
Aerosol Effects

Abstract. In this study, a full description and comprehensive evaluation of a global-regional nested model, the Aerosol and Atmospheric Chemistry Model of the Institute of Atmospheric Physics (IAP-AACM), is presented for the first time. Not only the global budgets and distribution, but also a comparison of nested simulation over China against multi-datasets are investigated, benefiting from the access of air quality monitoring data in China since 2013 and the Model Inter-Comparison Study for Asia project. The model results and analysis can greatly help reduce uncertainties and understand model diversity in assessing global and regional aerosol effects, especially over East Asia and areas affected by East Asia. The 1-year simulation for 2014 shows that the IAP-AACM is within the range of other models, and well reproduces both spatial distribution and seasonal variation of trace gases and aerosols over major continents and oceans (mostly within the factor of two). The model nicely captures spatial variation for carbon monoxide except an underestimation over the ocean that also shown in other models, which suggests the need for more accurate emission rate of ocean source. For aerosols, the simulation of fine-mode particulate matter (PM2.5) matches observation well and it has a better simulating ability on primary aerosols than secondary aerosols. This calls for more investigation on aerosol chemistry. Furthermore, IAP-AACM shows the superiority of global model, compared with regional model, on performing regional transportation for the nested simulation over East Asia. For the city evaluation over China, the model reproduces variation of sulfur dioxide (SO2), nitrogen dioxide (NO2) and PM2.5 accurately in most cities, with correlation coefficients above 0.5. Compared to the global simulation, the nested simulation exhibits an improved ability to capture the high temporal and spatial variability over China. In particular, the correlation coefficients for PM2.5, SO2 and NO2 are raised by ~ 0.25, ~ 0.15 and ~ 0.2 respectively in the nested grid. The summary provides constructive information for the application of chemical transport models. In future, we recommend the model's ability to capture high spatial variation of PM2.5 is yet to be improved.

EMERGENCE AND SEEDLING GROWTH OF INBRED LINES OF CORN AT SUBOPTIMAL ROOT-ZONE TEMPERATURES

1987 ◽  
Vol 67 (2) ◽  
pp. 409-415 ◽  
Author(s):  
A. MENKIR ◽  
E. N. LARTER
Keyword(s):  
Zea Mays ◽  
Seedling Growth ◽  
Root Zone ◽  
Seedling Emergence ◽  
Correlation Coefficients ◽  
Dry Weight ◽  
Inbred Lines ◽  
Root Zone Temperature ◽  
Emergence Percentage ◽  
Zone Temperature

Based on the results of an earlier paper, 12 inbred lines of corn (Zea mays L.) were evaluated for emergence and seedling growth at three controlled root-zone temperatures (10, 14, and 18 °C). Low root-zone temperatures, 10 and 14 °C, were detrimental to emergence, seedling growth, and root growth of all inbred lines. Differential responses of inbred lines were observed within each temperature regime. The differences in seedling emergence among lines became smaller with increasing root-zone temperature, while the reverse was true for seedling dry weight. Simple correlation coefficients showed a significantly (P = 0.05) negative association between emergence percentage and emergence index (rate). Neither of these two emergence traits was significantly correlated with seedling dry weights. Seedling dry weights were significantly (P = 0.01) and positively associated with root dry weights. Two inbred lines exhibited good tolerance to low root-zone temperatures, viz. CO255 and RB214. A significant and positive correlation existed between emergence percentage at a root-zone temperature of 10 °C and field emergence in test with the same genotypes reported earlier. Selection at a root-zone temperature of 10 °C for a high percentage of seedling emergence, therefore, could be effective in identifying genotypes capable of germinating in cool soils. Furthermore, the significantly (P = 0.01) positive relationship between seedling dry weights at all root-zone temperatures and those from the field test suggest that strains with vigorous seedling growth in the field could be identified using low root-zone temperature regimes.Key words: Zea mays, root-zone temperature, cold tolerance

scholarly journals Effect of Salinity Stress on Physiological Changes in Winter and Spring Wheat

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1193
Author(s):  
Muhammad Sohail Saddiq ◽  
Shahid Iqbal ◽  
Muhammad Bilal Hafeez ◽  
Amir M. H. Ibrahim ◽  
Ali Raza ◽  
...  
Keyword(s):  
Salt Stress ◽  
Chlorophyll Fluorescence ◽  
Winter Wheat ◽  
Spring Wheat ◽  
Root Length ◽  
Growth Traits ◽  
Triticum Aestivum L ◽  
Shoot Length ◽  
Plant Tolerance ◽  
Improvement Programs

Salinity is a leading threat to crop growth throughout the world. Salt stress induces altered physiological processes and several inhibitory effects on the growth of cereals, including wheat (Triticum aestivum L.). In this study, we determined the effects of salinity on five spring and five winter wheat genotypes seedlings. We evaluated the salt stress on root and shoot growth attributes, i.e., root length (RL), shoot length (SL), the relative growth rate of root length (RGR-RL), and shoot length (RGR-SL). The ionic content of the leaves was also measured. Physiological traits were also assessed, including stomatal conductance (gs), chlorophyll content index (CCI), and light-adapted leaf chlorophyll fluorescence, i.e., the quantum yield of photosystem II (Fv′/Fm′) and instantaneous chlorophyll fluorescence (Ft). Physiological and growth performance under salt stress (0, 100, and 200 mol/L) were explored at the seedling stage. The analysis showed that spring wheat accumulated low Na+ and high K+ in leaf blades compared with winter wheat. Among the genotypes, Sakha 8, S-24, W4909, and W4910 performed better and had improved physiological attributes (gs, Fv′/Fm′, and Ft) and seedling growth traits (RL, SL, RGR-SL, and RGR-RL), which were strongly linked with proper Na+ and K+ discrimination in leaves and the CCI in leaves. The identified genotypes could represent valuable resources for genetic improvement programs to provide a greater understanding of plant tolerance to salt stress.

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