scholarly journals Fertigation Temperature Adjustment Enhances the Yield and Quality of Saffron Grown in a Soilless Culture System

HortScience ◽  
2021 ◽  
pp. 1-4
Author(s):  
Yasmina Chourak ◽  
El Hassan Belarbi ◽  
Evelynn Y. Martínez-Rivera ◽  
Tatiana Pagan Loeiro da Cunha-Chiamolera ◽  
Ana Araceli Peña-Fernández ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
International Organization ◽  
Control Treatment ◽  
Soilless Culture ◽  
Organoleptic Properties ◽  
Phytochemical Content ◽  
Flower Production ◽  
Nutritive Solution ◽  
Yield And Quality

Saffron is one of the most appreciated, traditional, and expensive spices in the world. The objective of our study was to evaluate the effect of cooling the nutrient solution on the production, and organoleptic and commercial qualities of saffron grown in soilless culture. The nutrient solution was cooled to 4 to 5 °C whereas the control treatment was the fertigation supplied at ambient temperature. Corms were placed in a controlled cultivation chamber. The number of flowers per corms, and the weight and length of stigmas were measured. The amounts of safranal, crocin, and picrocrocin were analyzed spectrophotometrically according to the International Organization for Standardization [ISO/TS 3632-2 (2011) Normative]. Our results show that cooling of the nutritive solution increased flower production, the commercial phytochemical content, and organoleptic properties.

scholarly journals EFFECT OF BIOFERTILIZER AND COMPOST ON NITRATE STATUS, YIELD AND QUALITY OF POTATO TUBER UNDER NEWLY RECLAIMED SANDY SOIL

AGROFOR ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
S.F. EL-SAYED ◽  
A.A. GAHRIB ◽  
Rasha R. EID
Keyword(s):  
Sandy Soil ◽  
Control Treatment ◽  
High Yield ◽  
Potato Tubers ◽  
Treatment Control ◽  
Mineral Fertilization ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Compost Treatment

This investigation was carried out during the two summer seasons of 2015 and2016 in sandy soil on potato culitvar "Sante" to study the effect of using 100%compost (15 t/fed.) and 50% compost + nitrogen fixing bacteria (Azotobacter, andPseudomonas alone or together) on potato yield and quality as compared to theconventional mineral fertilization (120-75-150 kg/fed. NPK + 5 toncompost/fed.(control)). No significant differences in tubers yield/fed. were detectedbetween mineral fertilization (control) and using 100% compost (15t/fed).However, control treatment significantly produced a high yield per feddan,more than using 50% compost + any biofertilizer treatment.Using composttreatment at 15 t/fed.execeed all biofertilizer treatments in marketable yield in bothseasons, but without significant differences as compared with mineral fertilization(control).No significant differences in tuber dray matter and content of starch intuber were found between using compost treatment at 15 ton/fed. and mineralfertilization treatment (control)in both seasons. Nevertheless, application of 50%compost+ 4 applications of Azotobacter and Pseudomonas had the highest tuberconcentrations of starch and nitrogen with significant differences as compared withthe mineral fertilization.Using50% compost + 4 applications of Azotobacter orPseudomonas or both (Azotobacter + Pseudomonas )and application of 100%compost caused producing potato tubers with the lowest concentration of nitratewith significant differences as compared with the mineral fertilization. Nosignificant differences were detected between mineral and organic fertilizersconcerning P and K concentrations in tubers.

scholarly journals Deficit Irrigation in Vitis labruscana Bailey ‘Concord’ in Central Washington

HortScience ◽  
2017 ◽  
Vol 52 (3) ◽  
pp. 450-456 ◽  
Author(s):  
Jason E. Stout ◽  
Joan R. Davenport ◽  
R. Troy Peters
Keyword(s):  
Fruit Quality ◽  
Water Availability ◽  
Deficit Irrigation ◽  
Control Treatment ◽  
Commercial Practice ◽  
Yield And Quality ◽  
Vitis Labruscana ◽  
New Strategy ◽  
Sudden Decrease

Drought conditions in the western United States have limited water availability for the irrigation of agricultural products. This can have a dramatic impact on yield and quality of specialty perennial crops, such as juice grapes (Vitis labruscana Bailey). Washington State juice grape industry typically irrigates to 100% of crop-specific evapotranspiration (ETc) throughout the season to minimize yield loss. However, as conditions have limited water availability, growers need a new strategy to cope with the limited water supply. Regulated deficit irrigation (RDI) applies less water than plant ETc and has been shown to improve fruit quality in red wine grapes (Vitis vinifera). The objectives of this study were to evaluate the effects of RDI treatments on the yield and quality of ‘Concord’ juice grapes as compared with current commercial practice. The treatments reduced the amount of water applied between bloom and veraison by 25% (−25%), 33% (−33%), and 45% (−45%) from the control application. The results of this 4-year study initially indicated a dramatic decrease in yield in the −45% treatment (7.5 Mg/ha) as compared with the control treatment (19.2 Mg/ha); however, yield for the RDI treatments recovered in the subsequent seasons and was not statically different from the control. There were no statistical differences in fruit quality between treatments. This indicates that RDI has the potential to decrease water applied between bloom and veraison without impacting fruit quality; however, to avoid a sudden decrease in yield, it would be necessary to gradually reduce water applications over several years.

scholarly journals Yield and quality of 'gália' melon grown in coconut fiber under different concentrations of macronutrients in the nutrient solution

2017 ◽  
Vol 35 (4) ◽  
pp. 119-128 ◽  
Author(s):  
Christiano Rebougas Cosme ◽  
Nildo da Silva Dias ◽  
Karen Mariany Pereira Silva ◽  
Camilo Vinícius Trindade Silva ◽  
Ítalo Sorac Rafael de Queiroz ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Coconut Fiber ◽  
Yield And Quality

scholarly journals The effect of different nitrogen fertilization rates on yield and quality of marigold (Calendula officinalis L. 'Tokaj') raw material

2012 ◽  
Vol 64 (3) ◽  
pp. 29-34
Author(s):  
Beata Król
Keyword(s):  
Nitrogen Fertilization ◽  
Raw Material ◽  
Control Treatment ◽  
Calendula Officinalis ◽  
Fertilization Rates ◽  
Yield And Quality ◽  
Significant Difference ◽  
Pot Marigold ◽  
Nitrogen Rates

Pot marigold (<i>Calendula officinalis</i> L.) is an annual ornamental plant which is also grown for herbal raw material (flower heads) used in the pharmaceutical and cosmetic industries. A field experiment was carried out in the years 2006-2008 in the Experimental Farm of the University of Life Sciences in Lublin. The study was conducted on loess soil with the granulometric composition of silt loam. The aim of the experiment was to determine the effect of different nitrogen rates (0, 40, 80, 120, 160 kg N × ha<sup>-1</sup>) on some morphological features of flower heads as well as on yield and quality of pot marigold raw material. Flowering of pot marigold was shortest in the control treatment (32 days) and longest (43 days) in the plot where nitrogen fertilization had been applied at the highest rate (160 kg N × ha<sup>-1</sup>). Nitrogen fertilization had a significant influence on the number of flower heads per plant, but no significant difference was found in diameter as well as in ligulate flowers and tubular flowers in the flower head. It was found to increase significantly raw material yield after the application of 80 kg N × ha<sup>-1</sup>, compared to the control treatment. Yield of flower heads did not differ markedly for fertilization rates from 80 to 160 kg N × ha<sup>-1</sup>. Nitrogen fertilization modified slightly essential oil content (this content increased with increasing nitrogen rates), but at the same time it decreased the percentage of flavonoid compounds.

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