Influence of mild saline stress and growing season on yield and leaf quality of baby lettuce grown in floating system

2019 ◽  
pp. 147-152
Author(s):  
Y. Rouphael ◽  
P. Vitaglione ◽  
G. Colla ◽  
F. Napolitano ◽  
G. Raimondi ◽  
...  
Keyword(s):  
Growing Season ◽  
Saline Stress ◽  
Leaf Quality ◽  
Floating System

scholarly journals Soil and grapevine leaf quality in organic vineyards of different ages in DO Rioja-Alavesa, northern Spain

2021 ◽  
Vol 11 ◽  
Author(s):  
Xavier Úbeda ◽  
Marcos Francos ◽  
Pablo Eguzkiza ◽  
Estevao B. Stefanuto
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Growing Season ◽  
Northern Spain ◽  
Gas Emissions ◽  
Leaf Quality ◽  
Organic Cultivation ◽  
Different Ages

The soil from three organically cultivated plots in Rioja Alavesa vineyards, specifically in Lanciego (Álava, Spain), and the foliage of their vines were analyzed. The aim of this study was to determine differences in soil and grapevine quality between different aged vineyards. The first 20 centimeters of the soil were sampled and leaves were collected during the growing season. The results show that the quality of the soil in the three plots was optimal and did not differ from reported values of soils from traditionally cultivated plots. The only element found at a lower concentration in the three plots and the leaves was iron. Organic cultivation of vineyards is a viable mode of cultivation and could help reduce greenhouse gas emissions and contamination by pesticides and fertilizers.

scholarly journals Effects of Individual and Simultaneous Selenium and Iodine Biofortification of Baby-Leaf Lettuce Plants Grown in Two Different Hydroponic Systems

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 590
Author(s):  
Martina Puccinelli ◽  
Fernando Malorgio ◽  
Luca Incrocci ◽  
Irene Rosellini ◽  
Beatrice Pezzarossa
Keyword(s):  
Plant Growth ◽  
Sodium Selenate ◽  
System Quality ◽  
Leaf Quality ◽  
Post Harvest ◽  
Floating System ◽  
Hydroponic Systems ◽  
Leaf Lettuce ◽  
Global Population

The iodine (I) and selenium (Se) deficiencies affect approximately 30% and 15%, respectively, of the global population. The biofortification of vegetables is a valid way to increase the intake of iodine and selenium through the diet. This study was carried out on baby-leaf lettuce to investigate the effects on plant growth, leaf quality, and leaf I and Se accumulation of adding potassium iodide and sodium selenate, separately and simultaneously, to the nutrient solution in a floating system and aeroponics. The effect of I and Se biofortification on post-harvest quality of lettuce leaves was also evaluated. Our results evidenced that the Se and I treatments increased the content of the two microelements in lettuce leaves without any negative interactions in the plants, when applied either separately or simultaneously. Both hydroponic systems proved to be suitable for producing Se and/or I enriched lettuce. Biofortification with Se was more effective when performed in aeroponics, whereas I biofortification was more effective in the floating system. Quality of leaves during post-harvest storage was not affected by neither of the treatments. Lettuce leaves enriched with 13 µM Se and 5 µMI could be good dietary sources of Se and I without inducing toxic effects in humans.

Improvement of separate elements of the techno-logy of cultivation of white cabbage in the conditions of the of the central region of the non-chernozem zone

2020 ◽  
Author(s):  
A.V. Konstantinovich ◽  
◽  
A.S. Kuracheva ◽  
E.D. Binkevich
Keyword(s):  
Seed Treatment ◽  
Unit Area ◽  
Growing Season ◽  
Agricultural Products ◽  
Stress Factors ◽  
High Quality ◽  
Temperature And Precipitation ◽  
White Cabbage ◽  
Sowing Seed

In conditions of climate change, when temperature and precipitation fluctuations occur more and more frequently during the growing season, it is necessary to obtain high quality seedlings with "immunity" to various stress factors, including high weediness, the damage from which is associated with a decrease in yield (by 25 -35%) and with a deterioration in the quality of agricultural products. Due to the imbalance in production technology, seedlings are often weakened, overgrown, with a low yield per unit area and survival rate in the field. One of the solutions to this problem is the use of PP for pre-sowing seed treatment to increase the competitiveness of seedlings in the field.

scholarly journals Cold stress in the harvest period: effects on tobacco leaf quality and curing characteristics

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yan Li ◽  
Ke Ren ◽  
Mengyang Hu ◽  
Xian He ◽  
Kaiyuan Gu ◽  
...  
Keyword(s):  
Cold Stress ◽  
High Altitude ◽  
Weather Forecast ◽  
Production Quality ◽  
Chemical Components ◽  
Leaf Quality ◽  
Tobacco Leaves ◽  
Tobacco Leaf ◽  
Antioxidant Enzyme System

Abstract Background Weather change in high-altitude areas subjects mature tobacco (Nicotiana tabacum L.) to cold stress, which damages tobacco leaf yield and quality. A brupt diurnal temperature differences (the daily temperature dropping more than 20 °C) along with rainfall in tobacco-growing areas at an altitude above 2450 m, caused cold stress to field-grown tobacco. Results After the flue-cured tobacco suffered cold stress in the field, the surface color of tobacco leaves changed and obvious large browning areas were appeared, and the curing availability was extremely poor. Further research found the quality of fresh tobacco leaves, the content of key chemical components, and the production quality were greatly reduced by cold stress. We hypothesize that cold stress in high altitude environments destroyed the antioxidant enzyme system of mature flue-cured tobacco. Therefore, the quality of fresh tobacco leaves, the content of key chemical components, and the production quality were greatly reduced by cold stress. Conclusion This study confirmed that cold stress in high-altitude tobacco areas was the main reason for the browning of tobacco leaves during the tobacco curing process. This adverse environment seriously damaged the quality of tobacco leaves, but can be mitigated by pay attention to the weather forecast and pick tobacco leaves in advance.

scholarly journals The Influence of Rooting Substrate and Growth Regulators Indol butyric Acid and Naphthalene Acetic Acid in the Number and Length of Adventitious Roots to Hardwood Cuttings in Blueberry cv. ‘Bluecrop’ (Vaccinium corymbosum L.)

2016 ◽  
Vol 4 (4) ◽  
pp. 28
Author(s):  
Sabri Braha ◽  
Petrit Rama
Keyword(s):  
Growth Regulators ◽  
Growing Season ◽  
Vaccinium Corymbosum ◽  
Naphthalene Acetic Acid ◽  
Important Variation ◽  
Physiological Processes ◽  
One Year ◽  
The Impact ◽  
Better Than

The purpose of this research is to determine the impact of the turf-only substrate and turf–perlite in the ratio 2:1 and of growth regulators in the quality of adventive roots ( the number and length) of well lignified one-year old branches without fruit buds in the Bluecrop cultivar (Vaccinium corymbosum L.) taken at the end of the latent period before budding at the February 15 th during the -2015 growing season. In order to support the increase of the number of roots and their length the hardwood cuttings are treated with different IBA and NAA concentrations (1500, 3000, 4500 ppm), while a part of cuttings were untreated control. The number and the length of roots have increased in relation to the increase of concentration from 1500 to 3000 ppm followed by a decline of these values in concentrations over 3000 ppm. Respectively, the number of roots (8) and the higher values of root length (4.6 cm) are achieved in the turf–perlite substrate, IBA 3000 ppm (compared to the turf-only substrate). The presence of perlite helps the aeration of the substrate and supports biochemical and physiological processes which lead to the inducing of adventive roots. Regarding the number and length of roots an important variation for (p<0.05) was observed between different concentrations of IBA and NAA. In general the effect of IBA was a lot better than the effect of NAA.

scholarly journals Effect of selection methods on seed potato quality in the following season

2021 ◽  
Vol 922 (1) ◽  
pp. 012015
Author(s):  
N Gunadi ◽  
A Pronk ◽  
A A Kartasih ◽  
L Prabaningrum ◽  
T K Moekasan ◽  
...  
Keyword(s):  
Seed Potato ◽  
Block Design ◽  
Growing Season ◽  
Selection Method ◽  
Selection Methods ◽  
Plant Selection ◽  
West Java ◽  
Potato Quality ◽  
Randomized Complete Block Design

Abstract Most potato farmers in Indonesia select the small tubers at harvest for planting in the following season, the so-called farmers’ practice (FP). This propagation method is cheap, but the small tubers may come from less healthy plants, which increases the build-up of diseases with accelerated yield decreases over the seasons. Alternatively, farmers may identify healthy plants within the growing season and select those for propagation, the so-called positive plant selection method (PPSM). An experiment was carried out to evaluate the effects of PPSM compared to FP on yields in the following season in the two main potato growing areas of West Java, i.e., Pangalengan and Garut. Generations G2 and G3 of cv. Granola and one generation of the imported cv. Atlantic were used. Selected seeds using PPSM and FP were planted in the second season in a randomized complete block design. Results show that yields of seeds selected through PPSM were significantly higher compared to seeds selected through FP, over both locations, on average, 7.4, 5.5 and 1.2 ton ha−1 for Granola G2 and G3, and the Atlantic, respectively. These yield increases represent an increase in the gross revenue of 30.8 to 51.8 million IDR ha−1 for Granola and 1.9 to 7.8 million IDR ha−1 for Atlantic at a farm gate price of 7,000 and 6,500 IDR kg−1, respectively. This study confirms that PPSM is superior to FP and improves the quality of the farms saved seeds.

scholarly journals Effect of Foliage Application with Boron-Containing Chelate Complexones on Productivity and Quality of Flax Products

2021 ◽  
pp. 11-15
Author(s):  
А.И. Беленков ◽  
В.Н. Мельников ◽  
А.А. Петрова ◽  
Т.И. Смирнова ◽  
М.Н. Павлов
Keyword(s):  
Trace Elements ◽  
Physicochemical Properties ◽  
Field Test ◽  
Growing Season ◽  
Single Factor ◽  
Environmentally Safe ◽  
Plant Yields ◽  
Quality Of Products ◽  
Phenological Phases

В условиях двухлетнего полевого опыта на растениях льна-долгунца исследовано влияние внекорневой подкормки боросодежащими хелатными комплексонами на продуктивность и качество льнопродукции. Изучено действие борат-иминодисукцината (В-ИДЯК) и борат-этилендиаминдисукцината (В-ЭДДЯК) в сравнении с борной кислотой и борат-этилендиаминтетраацетатом (В-ЭДТУК). Исследования выполнили в 2019–2020 гг. в однофакторном полевом опыте. Установлено, что наиболее эффективное и экологически безопасное влияние оказывает внекорневая подкормка посевов льна-долгунца хелатным комплексом В-ЭДДЯК. При внекорневой подкормке часть препарата, попадая в почву, мобилизует также другие микроэлементы, тем самым оказывая стимулирующее действие на растения. Полученные результаты показали, что внекорневая подкормка боросодержащими соединениями существенно повлияла на накопление биомассы льна-долгунца. Выявлена положительная динамика влияния боросодержащих комплексов на прохождение фенологических фаз во второй половине вегетации. Внекорневая подкормка растений ускорила цветение льна, которое наступало раньше на 2–3 дня по сравнению с контролем. Применение подкормки хелатными боросодержащими комплексонами способствует росту урожайности растений, повышению качества продукции, в части улучшения физико-химических свойств льноволокна. Прибавка урожая к контролю составила: по льносоломе – 8,3–15,7% (3,2–6 ц/га), семенам – 38,4–56% (1,2–1,9 ц/га). Техническая длина соломы была выше у всех вариантов опыта на 8,5–10,4% по сравнению с контролем. При этом увеличивались: выход луба, прочность, пригодность и номер льносоломы. Увеличение содержания луба составило от 1,6 до 4,5%. Under the conditions of two-year field test, the effects of foliage application with boron-containing chelate complexones on the productivity and quality of flax products were investigated on long-stalked flax plants. The effect of borate-iminodisuccinate (B-IDSA) and borate-ethylene diamin-disuccinate (B-EDDSA) in comparison with boric acid and borate-ethylene diamintetraacetate (B-EDTAA) was studied. The researches were conducted in 2019–2020 in a single-factor field test. It has been found that the most effective and environmentally safe influence is exerted by foliage application of long-stalked flax sowings with the chelate complex B-EDDSA. In foliage application part of the preparation falling into the soil also mobilizes other trace elements, thereby exerting a stimulating effect on plants. The obtained results showed that foliage application with boron-containing compounds had a significant impact on the accumulation of long-stalked flax biomass. Positive dynamics of boron-containing complexes influence on phenological phases passage in the second half of growing season has been revealed. Foliage application of plants accelerated flax flowering, which occurred earlier by 2–3 days compared to control. The use of top-dressing with chelated boron-containing complexones contributes to the growth of plant yields, an increase in the quality of products, in terms of improving the physicochemical properties of flax fiber. The increase in the yield to control was: according to linen straw – 8.3–15.7% (3.2–6 c/ha), seeds – 38.4–56% (1.2–1.9 c/ha). The technical length of the straw was 8.5–10.4% higher in all experience variants compared to the control. At the same time the output of the bast, the strength, suitability and number of the linen straw have been increased. The increase in bast content ranged from 1.6 to 4.5%.

scholarly journals The BernClim plant phenological data set from the canton of Bern (Switzerland) 1970–2018

2019 ◽  
Vol 11 (4) ◽  
pp. 1645-1654 ◽  
Author(s):  
This Rutishauser ◽  
François Jeanneret ◽  
Robert Brügger ◽  
Yuri Brugnara ◽  
Christian Röthlisberger ◽  
...  
Keyword(s):  
Growing Season ◽  
Data Set ◽  
Urban And Regional Planning ◽  
Phenological Data ◽  
Observation Network ◽  
Good Internal Consistency ◽  
Change Impact ◽  
University Of Bern ◽  
The University

Abstract. In 1970, the Institute of Geography of the University of Bern initiated the phenological observation network BernClim. Seasonality information from plants, fog and snow was originally available for applications in urban and regional planning and agricultural and touristic suitability and is now a valuable data set for climate change impact studies. Covering the growing season, volunteer observers record the dates of key development stages of hazel (Corylus avellana), dandelion (Taraxacum officinale), apple tree (Pyrus malus) and beech (Fagus sylvatica). All observations consist of detailed site information, including location, altitude, exposition (aspect) and inclination, that makes BernClim unique in its richness in detail on decadal timescales. Quality control (QC) by experts and statistical analyses of the data have been performed to flag impossible dates, dates outside the biologically plausible range, repeated dates in the same year, stretches of consecutive identical dates and statistically inconsistent dates (outliers in time or in space). Here, we report BernClim data of 7414 plant phenological observations from 1970 to 2018 from 1304 sites at 110 stations, the QC procedure and selected applications (Rutishauser et al., 2019: https://doi.org/10.1594/PANGAEA.900102). The QC points to very good internal consistency (only 0.2 % were flagged as internally inconsistent) and likely high quality of the data. BernClim data indicate a trend towards an extended growing season. They also track the regime shift in the late 1980s well to pronounced earlier dates like numerous other phenological records across the Northern Hemisphere.

scholarly journals Microbial quality of linseed and fibre hemp plants during growing and harvest seasons

2008 ◽  
Vol 13 (4) ◽  
pp. 327 ◽  
Author(s):  
M. KOIVULA ◽  
H-R. KYMÄLÄINEN ◽  
L. VANNE
Keyword(s):  
Cannabis Sativa ◽  
Raw Materials ◽  
Microbiological Quality ◽  
Growing Season ◽  
Plate Count ◽  
Production Chain ◽  
Growing Seasons ◽  
Linum Usitatissimum L ◽  
Microbiological Analyses

Linseed (Linum usitatissimum L.) and fi bre hemp (Cannabis sativa L.) can be used as raw materials in various applications. In this study, microbiological quality and meteorological measurements were made during the growing seasons and harvesting periods of 2001 and 2002. The microbiological analyses were carried out with Hygicult® TPC and Y&F dipslides, and with a surface spreading method using Plate Count and Potato Dextrose agars. During the growing season of 2001 the conditions were mostly humid, whereas the growing season of 2002 was rather dry and warmer than that of 2001. The lack of water during the growing season of 2002 affected the growth of the plants. In the case of both hemp and fl ax, the mould and bacterial contents (cfu gdw-1) increased markedly at the end of the growing season of 2001. During the growing season of 2002 the increase in mould and bacterial contents was noticeable but more constant throughout the whole growing season. At the end of the growing seasons, the mould and bacteria contents were higher in 2001 than in 2002. The genera of moulds identifi ed included Cladosporium, Fusarium, Penicillium, Mucor and Alternaria. The microbiological safety should be controlled during the whole production chain, beginning with the cultivation and harvesting periods.;

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