Open Access Original Research Article

Yield and Yield Components of Maize as Affected by Planting Density

Most. Fahmeda Sarwar, Md. Maniruzzaman Bahadur, K. M. Manirul Islam, Tushar Kanti Ray, Md. Mir Kashim Ali

International Journal of Plant & Soil Science, Page 1-12
DOI: 10.9734/IJPSS/2016/22228

An experiment was carried out to investigate the effect of planting density on growth, development, yield and yield components contributing characteristics of maize during the period of November, 2012 to March 2013 in the Research Field and Laboratory of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. The experimental area belongs to Old Himalayan Piedmont Plain (AEZ-1) of Bangladesh having sandy loam soil with pH 6.1. The experimental treatments were five plant spacing (S1=75 cm X 25 cm, S2=75 cm X 20 cm, S3=60 cm X 25 cm, S4=65 cm X 20 cm and S5=50 cm X 25 cm) corresponding to 35,000, 50,000, 60,000, 80,000, 95,000 plants ha-1 respectively with one maize variety. The experiment was laid out in a single factor Randomized Complete Block Design (RCBD) with four replications. The experiment plots were divided into four blocks each representing a replication. Growth parameters, some phenological parameters such and some yield and yield attributes increased with decreased in plant the plant population. The highest grain yield of 5.65 t/ ha was produced at (S5) high planting density (95,000 plants ha-1) and the lowest grain yield of 4.21 t/ha was produced at (S1) lowest planting density (35,000 plants ha-1).

 

Open Access Original Research Article

Effect of Different Salt Concentrations on Germination and Seedling Growth of DIchondra (Dichondra repens)

Yaşar Özyigit, Sadik Çakmakci

International Journal of Plant & Soil Science, Page 1-8
DOI: 10.9734/IJPSS/2016/14284

This experiment was conducted in the laboratory of the Department of Field Crops, Faculty of Agriculture, Akdeniz University in 2012. As a material the seeds of dichondra (Dichondra repens) which is a green area plant were used and the study was performed as randomized plots design with three replications in both plastic Petri dishes and peat media. Distilled water was used to prepare different NaCl concentrations (control, 5000, 7500, 10000, 15000, 20000 and 25000 ppm). The results showed that, germination was not observed in 20000 and 25000 ppm concentrations, so these doses were excluded from this study. While increasing salinity levels delayed the first germination day (first emergence day in peat experiment), germination rate (emergence rate in peat experiment), root length, shoot length, root weight, shoot weight and root/shoot ratio (both length and weight) characteristics decreased with increasing NaCl concentrations. This study shows that, although some plant characteristics of dichondra is effected negatively by application of salinity levels, the plant has tolerance to a certain amount of salinity (approximately 5000-7500 ppm) in germination and seedling growth stage.

 

Open Access Original Research Article

Growth Physiology and Membrane Permeability of Okra (Abelmoschus esculentus L.) Seedlings as Affected by Salinity

J. Jeyapraba, S. Mahendran, N. Sujirtha

International Journal of Plant & Soil Science, Page 1-5
DOI: 10.9734/IJPSS/2016/22877

Aims: Among the abiotic stresses, salinity is one of the most important environmental constraints which provokes grave threats for agriculture and environment. It is a growing threat to agricultural crops and its impacts have already started becoming visible as expansion in the affected areas and deteriorating soil fertility and crop productivity. By considering this feature, a study was conducted to determine the salinity responses of selected okra cultivars on certain physiological and biochemical attributes.

Study Design: The experiment was laid out in a Completely Randomized Design with six treatments and four replications.

Place and Duration of Study: A study was conducted at the crop farm of the Eastern University, Sri Lanka during the yala season of the year 2014.

Methodology: The seeds of okra cultivar “Haritha” were surface sterilized with sodium hypochlorite 0.5% (v/v) and were allowed to germinate in petri dishes having filter papers saturated with distilled water as control and NaCl solutions of 25, 50, 75, 100 and 125 mM. The germinated seeds in distilled water and in saline solutions were transferred to plastic pots filled with soil/compost mixture (2:1V/V). The pots were irrigated with distilled water or saline solution for two weeks. The response of okra plants to salinity stress with respect to physiological growth attributes, water content and membrane permeability were investigated.

Results: Salinity stress did not show significant (P > 0.05) effect on shoot dry weight. However, root dry weight decreased with an increase of NaCl concentration. The root water content and shoot/root ratio increased significantly (P < 0.05) with an increase of salt concentration (25, 50, 75, 100 and 125 mM). It was observed that there was an increase in membrane permeability with associated electrolyte leakage when okra seedlings were exposed to high levels of salt particularly 100 and 125 mM NaCl.

Conclusion: The property of salinity tolerance depends on different physiological interactions. The growth physiological attributes presented by the plant in response to salinity may not be enough to determine its effect.

Open Access Original Research Article

Larrea tridentata Uptake of Trace Metals in Mine Tailings within an Arid Region of Nevada, USA

Douglas B. Sims, Christopher J. Collumb, Vernon F. Hodge, Konstantinos I. Vatalis, George Valakas

International Journal of Plant & Soil Science, Page 1-11
DOI: 10.9734/IJPSS/2016/22837

Larrea tridentata (creosote bush) growing in contaminated tailings of the Techatticup Mine in Nelson, Nevada were sampled and analyzed for trace metals. Samples were also collected outside the mine tailings to measure geogenic trace metal levels. These data show that some trace metals (Cu, Pb, Zn, Co, Fe, Li) enter L. tridentata through root tissues, but at significantly lower levels than in the tailings area. Trace metals that enter the root are higher in concentration in the outer than in the inner root tissue, possibly due to L. tridentata blocking their absorption at the outer root surface. Data further show the plant’s ability to block the intake of these toxic trace metals that may adversely affect the plant. Statistical analysis suggests that certain metals, while not in high abundance, may be utilized by the plant for self-defense mechanisms or to aid in plant development. Finally, differences between plant components may be the result of hyper-accumulation of useful trace metals (e.g. B, Cr, Zn) and a blockage of potentially toxic trace metals (e.g. Cd, Pb, V). 

 

Open Access Original Research Article

Effect of Nitrogen and Sulphur on Growth and Yield Attributes of Potato (Solanum tuberosum L.)

Harinder Singh, Madhu Sharma, Aakash Goyal, Monika Bansal

International Journal of Plant & Soil Science, Page 1-8
DOI: 10.9734/IJPSS/2016/20237

This investigation was carried out to study the effect of four levels of nitrogen (0,90,180,270) and three levels of sulphur (0,25,50) application on growth and yield attributes of potation a split plot design with three replication, at lovely professional university, Phagwara, Punjab, India. The treatments ware replicated thrice in split plot design. The study revealed that application of N 180 kgha-1 + S 50 kgha-1 significantly enhanced morphological and quality attributes such as plant emergence, number of shoots, periodic plant height, dry matter accumulation, leaf area index, percent reducing sugar and tuber dry matter, there by proving the role of sulphur and nitrogen in high tuber yield in potato ‘Kufri-chipsona-3’. Among all treatments,highest total and processable yield was exhibited by treatment T9 i.e N 180 kgha-1+S 50 kg/ha-1expressing the role of S in N uptake and use efficiency. Benefit cost (B: C) ratio was 2.25 which also indicates maximum profitability obtained with this combination.

 

Open Access Original Research Article

Number of Nodes and Part of Vine Cutting Effect on the Growth and Yield of Sweetpotato (Ipomoea batatas (L.) Lam) in Transitional Zone of Ghana

M. E. Essilfie, H. K. Dapaah, J. W. Tevor, K. Darkwa

International Journal of Plant & Soil Science, Page 1-14
DOI: 10.9734/IJPSS/2016/22776

 

 

Two field experiments were conducted at the Multipurpose crop nursery of the University of Education, Winneba, Mampong campus from May to September, 2013 and June to October, 2014 respectively to investigate into the effect of number of nodes (4, 5 and 6) and vine part (apical and semiwoody) on the growth and yield  of sweetpotato. The results from both seasons showed that many of the characters measured increased with increase node number up to 6 nodes and with apical vine part. The apical vine cuttings established earlier than semiwoody cuttings in both seasons. Node numbers did not have significant effect on any of the yield characters measured although the 5 and 6 node cuttings gave higher marketable tuber weight per plot, tuber length and marketable tuber number per plot than the 4 node cuttings during 2014 growing season. The 5 node apical cuttings produced significantly higher vegetative biomass than 5 node semiwoody and the 4 and 6 node apical and semiwoody cuttings.