1,721,021 research outputs found
Melon crops (Cucumis melo L., cv. Tendral) grown in a mediterranean environment under saline-sodic conditions: Part I. Yield and quality
No full textMelon plants (Cucumis melo L.) cv. Tendral were grown in an open field trial in 2004 to investigate the effect of increased saline sodic water concentration on yield, crop tolerance, fruit quality and ion content. Three saline water concentrations were created by adding 5, 10 and 20gl-1 of commercial sea salt (NaCl) to well water. These treatments were compared against well water (C) with an electrical conductivity (ECw) of 0.9dSm-1. The ECw of the saline water was 8.7, 15.3, and 28.2dSm-1 for treatments T0.5, T1 and T2, respectively. The experimental field was used between 1995 and 2001 for trials that studied the effects of saline irrigation on crop yield responses. Later, between 2002 and 2003, the same field was irrigated by well water. Increased salinity significantly reduced the leaf area index (LAI) and leaf area duration (LAD) for both vegetative growth and fructification, whereas the net assimilation rate (NAR) was reduced only during vegetative growth. Yield reduction resulted from the number and average weight of the marketable fruit. The maximum mean seasonal electrical conductivity of a saturated soil paste ECed- without yield reduction (i.e., the salt tolerance threshold) was 1.73 and 1.54dSm-1 for the total yield and the marketable yield, respectively. Above the salt tolerance threshold, the total yield was reduced, per unit increase of soil salinity, by 14%, and the marketable yield by 15%. The salinity positively affected the refractometric degree. Preservability was moderate in treatments C, T0.5 and T1, whereas it was good for treatment T2. There were significantly fewer rotten fruit in T2 than in treatments C, T0.5 and T1. The salinity treatments increased the Na concentration in the leaves and stems; Na concentration decreased from the basal to apical part of the plant (for both leaves and stems). In addition, the maintenance of K selectivity in both plant parts could be a strategy used by the plants for increasing their salt tolerance and enhancing fruit quality (TSS). © 2011 Elsevier B.V
Field phenotyping and quality traits of grass pea genotypes in South Italy
No full textBACKGROUND: Grass pea (Laithyrus sativus L.) is a rustic plant whose seeds are rich in polyphenols and antioxidants, and it has been consumed as food by human beings since ancient times. This study was conducted in Italy between 2017and 2019 to evaluate, under field conditions, the stability of seed yield, biomass and 1000-seed weight (THS) and to assess the antioxidant composition and activity of 11 grass pea accessions. RESULTS: Analysis of variance revealed significant effects of the environment, accession and accession × environment (A × E) on the yield, above-ground biomass and THS. We found that the environment (year) and A × E explained 52.61% and 23.76% of the total seed yield variation, respectively. No relationship was observed between the yield and the total protein of seeds. Most grass pea accessions showed sensitivity to frost conditions that occurred in the third growing season. The total phenolic content ranged from 50.51 to 112.78 mg 100 g−1 seeds and antioxidant activity ranged from 0.576 to 0.898 mmol Trolox equivalents 100 g−1 seeds and from 0.91 to 1.6 mmol Fe2+ 100 g−1 seeds in 2,20-azinobis-3-ethylbenzothiazoline-6-sulfonic acid and ferric-reducing antioxidant power, respectively. Among the accessions, the ‘Campi Flegrei’ and ‘di Castelcività’ showed the best performance with the highest yield and stability, phenolic content and superior antioxidant activity. CONCLUSION: The results showed that the yield of grass pea was mainly influenced by different climate conditions. This variability in yield, phenolic content and antioxidant activity among different accessions could help breeders and farmers select high-performance accessions for cultivation. © 2020 Society of Chemical Industry
Impiego di acqua addizionata di CO2 nell'irrigazione della patata nella piana del Sele. Risultati del primo anno di prova.
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Modification of mature Kiwifruit root systems due to winter time waterlogging conditions.
No full textGrain yield and water consumption of ethephon treated corn under different irrigation regimes.
No full textAssessing Amaranth Adaptability in a Mediterranean Area of South Italy under Different Climatic Scenarios
No full textThe aim of the present work was to study the adaptability of amaranth in a typical Mediterranean environment of South Italy under changing climate scenarios. In a first stage, experimental data from a field trial conducted during 2009-2010 on the Volturno River Plain (Italy) with grain amaranth grown under different irrigation strategies, were used to define the thermal requirements and the yield response function to soil water availability of amaranth. The observed soil moisture data were used to calculate the relative soil water deficit (RSWD) index and seed yield data were expressed as relative yield (Yr). Yr and RSWD calculated data were then graphically correlated to obtain the amaranth yield response function to soil water availability. In a second stage the SALTMED model was used to simulate impacts of present, past and future climate scenarios on amaranth growth cycle and yield. Climate-change scenarios (Special Report on Emission Scenarios A1B, A2 and B1) data, used as input in the model, were derived from six global circulation models using a weather generator. The results showed that in a changing climate, temperature affects the relative duration of the growth cycle and could be a critical determinant of grain yield. The use of supplemental irrigations could allow the amaranth to guarantee a high seed yield under Mediterranean conditions
Modification of mature Kiwifruit root systems due to winter time waterlogging conditions.
No full textImpiego di acqua addizionata di CO2 nell'irrigazione della patata nella piana del Sele. Risultati del primo anno di prova.
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