scholarly journals Effect of Salinity on Biomass Yield and Physiological and Stem-Root Anatomical Characteristics of Purslane (Portulaca oleraceaL.) Accessions

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Md. Amirul Alam ◽  
Abdul Shukor Juraimi ◽  
M. Y. Rafii ◽  
Azizah Abdul Hamid
Keyword(s):  
Dry Matter ◽  
Detrimental Effect ◽  
Biomass Yield ◽  
Principal Component ◽  
Yield Reduction ◽  
Salinity Effect ◽  
3 Dimensional ◽  
Matter Production ◽  
Significant Damage ◽  
Salinity Levels

13 selected purslane accessions were subjected to five salinity levels 0, 8, 16, 24, and 32 dS m−1. Salinity effect was evaluated on the basis of biomass yield reduction, physiological attributes, and stem-root anatomical changes. Aggravated salinity stress caused significant (P<0.05) reduction in all measured parameters and the highest salinity showed more detrimental effect compared to control as well as lower salinity levels. The fresh and dry matter production was found to increase in Ac1, Ac9, and Ac13 from lower to higher salinity levels but others were badly affected. Considering salinity effect on purslane physiology, increase in chlorophyll content was seen in Ac2, Ac4, Ac6, and Ac8 at 16 dS m−1salinity, whereas Ac4, Ac9, and Ac12 showed increased photosynthesis at the same salinity levels compared to control. Anatomically, stem cortical tissues of Ac5, Ac9, and Ac12 were unaffected at control and 8 dS m−1salinity but root cortical tissues did not show any significant damage except a bit enlargement in Ac12 and Ac13. A dendrogram was constructed by UPGMA based on biomass yield and physiological traits where all 13 accessions were grouped into 5 clusters proving greater diversity among them. The 3-dimensional principal component analysis (PCA) has also confirmed the output of grouping from cluster analysis. Overall, salinity stressed among all 13 purslane accessions considering biomass production, physiological growth, and anatomical development Ac9 was the best salt-tolerant purslane accession and Ac13 was the most affected accession.

Common Sunflower (Helianthus annuus) Interference in Soybean (Glycine max)

1996 ◽  
Vol 10 (2) ◽  
pp. 317-321 ◽  
Author(s):  
Patrick W. Geier ◽  
Larry D. Maddux ◽  
Loren J. Moshier ◽  
Phillip W. Stahlman
Keyword(s):  
Dry Matter ◽  
Market Price ◽  
Yield Reduction ◽  
Soybean Yield ◽  
Sunflower Plant ◽  
Matter Production ◽  
Competition Study ◽  
Soybean Canopy ◽  
Relationship Of ◽  
The Relationship

An in-row competition study was conducted in 1991 and 1992 near Silver Lake, KS to determine the relationship of noncultivated common sunflower density to soybean yield, PAR at the soybean canopy, and common sunflower dry matter production. Because of environmental differences, year main effect interactions occurred, so results are presented by year. For example, 0.3 common sunflower plant/m2produced 4030 kg/ha of aboveground dry matter in 1991 and 1300 kg/ha in 1992. Soybean yield reduction ranged from 19 and 17% with 0.3 common sunflower plant/m2to 97 and 95% with 4.6 plant/m2, in 1991 and 1992, respectively. Assuming a treatment cost of $35/ha and a soybean market price of $0.21/kg, economic threshold levels were 0.1 common sunflower plant/m2in 1991, and 0.07 in 1992. Common sunflower at 0.3 plant/m2reduced PAR at the soybean canopy by 390 and 300 μE/m2/s, or 24 and 18% in 1991 and 1992, respectively. We conclude that the ability of common sunflower to intercept PAR above the soybean canopy is an important component in its interference with soybean.

scholarly journals Dry matter, protein, and energy digestibility of diets for juvenile Pacific white leg shrimps (Litopenaeus vannamei) reared at different salinity levels

2021 ◽  
Vol 51 (8) ◽  
Author(s):  
Yuniel Méndez-Martínez ◽  
Milena Gucić ◽  
Luis Rafael Martínez-Córdova ◽  
Roberto Civera-Cerecedo ◽  
Denis Ricque-Marie ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Litopenaeus Vannamei ◽  
Dry Matter ◽  
Principal Component ◽  
Protein Digestibility ◽  
High Water ◽  
Dry Matter Digestibility ◽  
Salinity Levels ◽  
Inert Diet

ABSTRACT: This study evaluated the effect of low, medium, and high-water salinity (5, 35, and 50 ppt) on the apparent dry matter, protein, and energy digestibility of two formulated and six commercial diets for juvenile whiteleg shrimp, Litopenaeus vannamei, in a 120-day trial. Digestibility was determined in vivo using chromic oxide as an inert diet marker. Hydrostability in pellets varied from 86.8% to 99.9%; dry matter digestibility varied from 49.1% to 64.1%; protein digestibility showed greater variations at all salinities (56.9%-85.8%); and energy digestibility ranged from 70.1 to 86.4%. Salinity had a significant effect on dry matter, protein, and energy digestibility. Using a principal component analysis (PCA) with a covariance matrix, our findings suggested that the E2 (fishmeal-based formulation) diet and 35 ppt salinity provided optimum hydrostability and digestibility to Pacific white leg shrimp juveniles.

scholarly journals Salinity stress on morphological and nutritional quality of Napier cultivars under hydroponic condition

2017 ◽  
Vol 46 (2) ◽  
pp. 102-108 ◽  
Author(s):  
MK Alam ◽  
NR Sarker ◽  
KM Nasiruddin ◽  
AM Shohael
Keyword(s):  
Salinity Stress ◽  
Nutritional Quality ◽  
Dry Matter ◽  
Large Scale ◽  
Biomass Yield ◽  
Agricultural Research ◽  
Hydroponic System ◽  
Salinity Levels ◽  
On Farm

The study was conducted to determine the effect of salinity stress on morphological and nutritional quality of Napier cultivars in terms of biomass yield, tiller numbers, leaf number, tiller height, shoot presence or absence per cutting, leaf condition, dry matter (DM) and crud protein (CP) content under hydroponic condition.  four Napier cultivars such as BLRI Napier-1, BLRI Napier-2, BLRI Napier-3 and BLRI Napier-4 were cultivated under hydroponic system developed by Bangladesh Agricultural Research Institute (BARI) with some modifications. All the selected cultivars were grown by using BARI standard hydroponic solution. Five salinity levels were considered as treatments such as 3, 4, 5, 6 and 7 dS m-1 using different NaCl concentrations corresponding to the nutrient solution which were noted as T1 to T5 and T0 was used as control where salinity level was 2.3 dSm-1.  Four Napier cultivars were grown with 4 replications under each salinity condition and all the treatments were arranged in a Randomized Complete Block (RCB) design. Shoot presence or absence per cutting and leaf condition were determined weekly. The results revealed that the biomass yield, number of tillers, leaf numbers, tiller height, shoot presence or absence per cutting, leaf condition, and DM   and CP content among all the cultivars were decreased linearly with the increased of salinity levels. On the basis of different morphological and nutritional parameters, tolerance level of different cultivars of Napier grass to salinity stress can be rated as: BLRI Napier-4>BLRI Napier-3 > BLRI Napier-2 >BLRI Napier-1. Further study need to determine the suitability for large scale adaptation under on-farm conditions.Bang. J. Anim. Sci. 2017. 46 (2): 102-108

scholarly journals Screening of Purslane (Portulaca oleraceaL.) Accessions for High Salt Tolerance

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Md. Amirul Alam ◽  
Abdul Shukor Juraimi ◽  
M. Y. Rafii ◽  
Azizah Abdul Hamid ◽  
Farzad Aslani
Keyword(s):  
Salt Tolerance ◽  
Salinity Stress ◽  
Dry Matter ◽  
Population Pressure ◽  
Yield Reduction ◽  
Salt Tolerant ◽  
Salinity Levels ◽  
Cultivable Land ◽  
High Salt Tolerance ◽  
Crop Variety

Purslane (Portulaca oleraceaL.) is an herbaceous leafy vegetable crop, comparatively more salt-tolerant than any other vegetables with high antioxidants, minerals, and vitamins. Salt-tolerant crop variety development is of importance due to inadequate cultivable land and escalating salinity together with population pressure. In this view a total of 25 purslane accessions were initially selected from 45 collected purslane accessions based on better growth performance and subjected to 5 different salinity levels, that is, 0.0, 10.0, 20.0, 30.0, and 40.0 dS m−1NaCl. Plant height, number of leaves, number of flowers, and dry matter contents in salt treated purslane accessions were significantly reduced (P≤0.05) and the enormity of reduction increased with increasing salinity stress. Based on dry matter yield reduction, among all 25 purslane accessions 2 accessions were graded as tolerant (Ac7 and Ac9), 6 accessions were moderately tolerant (Ac3, Ac5, Ac6, Ac10, Ac11, and Ac12), 5 accessions were moderately susceptible (Ac1, Ac2, Ac4, Ac8, and Ac13), and the remaining 12 accessions were susceptible to salinity stress and discarded from further study. The selected 13 purslane accessions could assist in the identification of superior genes for salt tolerance in purslane for improving its productivity and sustainable agricultural production.

The influence of NaCl salinity and hypoxia on aspects of growth in Trifolium species

2009 ◽  
Vol 60 (1) ◽  
pp. 71 ◽  
Author(s):  
M. E. Rogers ◽  
T. D. Colmer ◽  
K. Frost ◽  
D. Henry ◽  
D. Cornwall ◽  
...  
Keyword(s):  
Dry Matter ◽  
Shoot Growth ◽  
Nutritive Value ◽  
Dry Matter Production ◽  
Hypoxic Conditions ◽  
Dry Matter Digestibility ◽  
Matter Production ◽  
Ion Relations ◽  
Salinity Levels ◽  
Trifolium Michelianum

The effects of salinity and hypoxia on growth, nutritive value, and ion relations were evaluated in 38 species of Trifolium and 3 check legume species (Trifolium fragiferum, Trifolium michelianum, and Medicago sativa) under glasshouse conditions, with the aim of identifying species that may be suitable for saline and/or waterlogged conditions. In the first set of experiments, plants were grown hydroponically at four NaCl concentrations (0, 40, 80, and 160 mm NaCl) and harvested after exposure to these treatments for 4 weeks. NaCl concentrations up to 160 mm reduced dry matter production in most species; however, there were differences in salt tolerance among species, with T. argutum, T. diffusum, T. hybridum, and T. ornithopodioides performing well under the saline conditions (dry matter production was reduced by less than 20%). Concentrations of Na+ and Cl− in the shoots increased with increasing salinity levels, and species again differed in their capacity to limit the uptake of these ions. Dry matter digestibility at 0 mm ranged from 49.8% (T. palaestinum) to 74.0% (T. vesiculosum) and decreased with increasing NaCl concentrations. A second set of experiments evaluated the tolerance of Trifolium species to hypoxic conditions in the glasshouse. Shoot growth, and to a lesser extent root growth, were reduced in all Trifolium species when plants were exposed to stagnant, non-aerated conditions for 28 days, but T. michelianum, T. resupinatum, T. squamosum, T. nigrescens, T. ornithopodioides, T. salmoneum, and T. fragiferum were the least affected species. All species acclimated to the oxygen-depleted conditions by increasing the gas-filled porosity in the roots. This study has provided information that will assist in the identification of forage species for saline and/or waterlogged areas.

Erratum to: The influence of NaCl salinity and hypoxia on aspects of growth in Trifolium species

2010 ◽  
Vol 61 (12) ◽  
pp. 1049
Author(s):  
M. E. Rogers ◽  
T. D Colmer ◽  
K. Frost ◽  
D. Henry ◽  
D. Cornwall ◽  
...  
Keyword(s):  
Dry Matter ◽  
Shoot Growth ◽  
Nutritive Value ◽  
Dry Matter Production ◽  
Hypoxic Conditions ◽  
Dry Matter Digestibility ◽  
Matter Production ◽  
Ion Relations ◽  
Salinity Levels ◽  
Trifolium Michelianum

The effects of salinity and hypoxia on growth, nutritive value, and ion relations were evaluated in 38 species of Trifolium and 3 check legume species (Trifolium fragiferum, Trifolium michelianum, and Medicago sativa) under glasshouse conditions, with the aim of identifying species that may be suitable for saline and/or waterlogged conditions. In the first set of experiments, plants were grown hydroponically at four NaCl concentrations (0, 40, 80, and 160�mm NaCl) and harvested after exposure to these treatments for 4 weeks. NaCl concentrations up to 160�mM reduced dry matter production in most species; however, there were differences in salt tolerance among species, with T. argutum, T. diffusum, T. hybridum, and T. ornithopodioides performing well under the saline conditions (dry matter production was reduced by less than 20%). Concentrations of Na+ and Cl- in the shoots increased with increasing salinity levels, and species again differed in their capacity to limit the uptake of these ions. Dry matter digestibility at 0�mm ranged from 49.8% (T. palaestinum) to 74.0% (T. vesiculosum) and decreased with increasing NaCl concentrations. A second set of experiments evaluated the tolerance of Trifolium species to hypoxic conditions in the glasshouse. Shoot growth, and to a lesser extent root growth, were reduced in all Trifolium species when plants were exposed to stagnant, non-aerated conditions for 28 days, but T. michelianum, T. resupinatum, T. squamosum, T. nigrescens, T. ornithopodioides, T. salmoneum, and T. fragiferum were the least affected species. All species acclimated to the oxygen-depleted conditions by increasing the gas-filled porosity in the roots. This study has provided information that will assist in the identification of forage species for saline and/or waterlogged areas.

Irrigating perennial pasture with saline water: effects on soil chemistry, pasture production and composition

2002 ◽  
Vol 42 (3) ◽  
pp. 265 ◽  
Author(s):  
M. E. Rogers
Keyword(s):  
Irrigation Water ◽  
Dry Matter ◽  
Saline Water ◽  
Dry Matter Production ◽  
Pasture Production ◽  
Saline Irrigation ◽  
Dry Matter Digestibility ◽  
Matter Production ◽  
Salinity Levels

In response to a local survey that revealed that many farmers in the Goulburn Valley region of Victoria did not adhere to recommendations for safely applying saline irrigation water to perennial pasture, an experiment was conducted at Tatura. Six irrigation water quality treatments, which differed in the timing of the application of saline water, were applied to perennial pasture plots over 4 irrigation seasons. Measurements made included soil EC1:5, soil SAR1:5, soil ESP, pasture dry matter production and composition, dry matter digestibility, tissue ion concentrations and mineral ash content. After 4 seasons, in which the winter rainfall for each season was significantly lower than the long-term average, soil sodicity and salinity levels appeared to reach steady values. Plots irrigated with non-saline water (0.1 dS/m, treatment 1) performed the best in terms of lower soil salinity and sodicity levels and higher dry matter production and pasture quality levels. However, for most of these measurements and for most seasons, there were no significant differences between the control plots and those irrigated with water at 1.2 dS/m (treatment 2). Soil EC1:5 and SAR1:5 levels were highest, and dry matter production and dry matter digestibility levels the lowest (particularly for the clover component), in plots irrigated with water at 2.4 dS/m throughout the season (treatment 6). There were no significant differences in soil characteristics or biomass production between the remaining 3 treatments (treatments 3, 4 and 5) or between treatment 2. These treatments had the same amount of salt applied throughout the season but differed in the pattern of salt application — whether it occurred at the beginning or end of the season, or was alternated with fresh water throughout the season. This study confirmed that in the long term, there is a reduction in the yield of perennial pastures when saline irrigation water at levels greater than 0.8–1.2 dS/m is used on the red-brown earths of the Shepparton Irrigation Region. However, the soil and pasture were more sensitive to the total amount of salt applied rather than to the pattern of salt application throughout the season. It was concluded that farmers should monitor the salinity levels of their irrigation water to avoid a build up of Na+ and Cl– in the soil profile and consequent long-term reductions in herbage production and quality.

Effects of aluminium on nodulation and early growth of four tropical pasture legumes

1984 ◽  
Vol 35 (5) ◽  
pp. 663 ◽  
Author(s):  
HE Murphy ◽  
DG Edwards ◽  
CJ Asher
Keyword(s):  
Dry Matter ◽  
Dry Weight ◽  
Aluminium Toxicity ◽  
Yield Reduction ◽  
Stylosanthes Guianensis ◽  
Pasture Legumes ◽  
Matter Production ◽  
Significant Yield ◽  
Macroptilium Lathyroides ◽  
Solution Cultures

Effects of aluminium concentrations of 0, 12.5, 25, 50, 100 or 125 �M on the nodulation and growth of Centrosema pubescens cv. Belalto, Macroptilium lathyroides cv. Murray, Stylosanthes guianensis cv. Schofield and Stylosanthes guianensis cv. Oxley were studied in solution cultures maintained at pH 4.5. The strains of Rhizobium used were CB1923, CB756, CB756 and CB1650 respectively. Solutions containing >25 �M aluminium (Al) delayed the appearance of nodules and reduced the percentage of plants which nodulated and the number and dry weight of nodules produced by all four legumes. At 125 �M Al, the proportion of plants which nodulated ranked in the order M. lathyroides (42%) > C. pubescens (29%) > Schofield stylo (16%) > Oxley stylo (0%). However, there were no significant effects of Al on dry matter production in M. lathyroides or C. pubescens. In Schofield stylo 250 �M A1 caused a small but significant yield reduction. In Oxley stylo, the yield reduction was significant at 25 �M , but became large only at 125 �M. It is concluded that in M. lathyroides, C. pubescens, and possibly Schofield stylo, nodulation is more sensitive to aluminium toxicity than is host plant growth. In Oxley stylo, threshold concentrations were similar for significant effects of aluminium toxicity on nodulation and growth.

Effect of groundwater pump management on reclaiming salinised land in the Goulburn Valley, Victoria

1995 ◽  
Vol 35 (2) ◽  
pp. 215 ◽  
Author(s):  
CP Norman
Keyword(s):  
Soil Salinity ◽  
Dry Matter ◽  
Root Zone ◽  
Groundwater Pumping ◽  
Pasture Production ◽  
Salinity Control ◽  
Management Regime ◽  
Matter Production ◽  
Salinity Levels ◽  
Intermittent Pumping

In 1985, groundwater pumping from shallow aquifers, with off-farm disposal, began near Girgarre in the Goulburn Valley, Victoria, to provide salinity control to about 1000 ha of farming land. Two groundwater pumps (TI02 and T103) ran continuously for the first 5 years of the project before reverting to intermittent pumping. The operation of a third pump (T103) was based on the capacity for disposal into an evaporation basin. Following 3 years of groundwater pumping, significant reductions in root-zone (0-0.6 m) soil salinity levels were recorded in both annual and perennial pasture paddocks within 350 m of a pump. Yields of perennial pasture on all monitored paddocks showed a significant increase after commencement of the project. In a paddock 300 m from a groundwater pump, average dry matter production increased from 6.3 to 17.2 t/ha. year within 4 years of pumping. Reclamation was reduced by more than a year on paddocks not subjected to irrigation, or those located >800 m from a groundwater pump. Once reclamation was achieved from continuous pumping, the introduction of intermittent pumping continued to maintain optimum soil salinity and pasture production levels on the irrigated paddocks. However, on a dryland paddock and those located >800 m from a pump, increasing fluctuations in soil salinity and soil sodicity levels were measured under this management regime.

scholarly journals Evaluation of black gram genotypes for saline tolerance at seedling stage

2019 ◽  
Author(s):  
M. Prakash ◽  
B. Priyadharshini ◽  
M. Vignesh ◽  
R. Anandan
Keyword(s):  
Agricultural Production ◽  
Dry Matter ◽  
Pigeon Pea ◽  
Seedling Stage ◽  
Black Gram ◽  
Salt Tolerant ◽  
Saline Tolerance ◽  
Matter Production ◽  
Salinity Levels ◽  
Early Seedling

Black gram [Vigna mungo (L.) Hepper] is the third most important pulse crop in India after chickpea and pigeon pea. Soil salinity is one of the major factor responsible for loss in agricultural production. Forty eight black gram genotypes were evaluated for salt tolerance with six different salinity levels viz., EC0, EC4, EC7, EC10, EC13, EC16 at early seedling stage. All the seedling parameters and salt tolerant index were investigated from four days old seedlings. From the results, it was found that there was a gradual decrease with increasing levels of salinity in all the genotypes studied. Seed germination and dry matter production showed more variations than other parameters studied for all the genotypes at different salinity levels. Based on the results, it may be concluded that the genotypes VNBG 017, AUB 3 AND AUB 20 were saline tolerant and VNBG 022, AUB 31 AND AUB 12 were susceptible to salinity.

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