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Mortazavi S.M.H.,Shahid Chamran University | Karami Z.,Shahid Chamran University | Mostaan A.,Date Palm and Tropical Fruits Research Institute
International Journal of Postharvest Technology and Innovation | Year: 2015

Among different physiological stages of development, the fruit of many date palm cultivars is harvested at Tamar stage. But for some cultuvars, which have low tannin content, fruit can be harvested and consumed at khalal stage when it is crispy in texture and sweet in taste. Due to have an active metabolism and high water content, storage and marketing of khalal date is limited by skin wrinkling and quick incidence of soft brown spots (SBS). This study was conducted to evaluate the effects of different packaging methods (control, passive MAP, MAP + ethylene scavenger sachet) and then storing at 5 or 15°C on the quality of khalal date fruit cv. barhee. During 27 days of storage, fruit were analysed in three day intervals and evaluated for different quality parameters, including flesh firmness, weight loss, titratable acidity, total soluble solids (TSS), incidence of SBS, electrolyte leakage and surface colour. MAP treatment with ethylene scavenger sachets was found to be effective in lowering weight loss (0.42%) and SBS (35%) and maintaining tissue firmness. Furthermore, other quality parameters experienced low changes in this treatment. Among the two storage temperatures, fruit which held at 5°C, remained firmer and showed superior in quality than those stored at 15°C. Copyright © 2015 Inderscience Enterprises Ltd.

Abdulhamid M.,Date Palm and Tropical Fruits Research Institute
Advances in Environmental Biology | Year: 2012

The Khuzestan Province in Iran hosts many small industrial plants and other sources of heavy metals' emissions. Date palm is an important agricultural crop in the region so this study was done to evaluate the use of various crop species intercropped with date palm to decontaminate the soil and remediate heavy metals pollution in the Khuzestan Province. There is no known study that has identified plants or crop species with tolerance for contaminated soil and a capability to accumulate heavy metals. Therefore, the aim of this study was 1) to assess accumulations of heavy metals in the soil and the effect of date palm in various cropping systems; 2) to assess the removal of heavy metals by root and shoot of alfalfa, sunflower and maize; tests were done on monocultures and intercropping with date palm. Results showed that alfalfa with or without date palm were capable of accumulating cadmium.

Torahi A.,Date Palm and Tropical Fruits Research Institute
Acta Horticulturae | Year: 2010

Ber (Ziziphus spp.) is the hardiest cultivated fruit tree grown in most of the hot drier parts of many countries for its fresh fruits. Its deep taproot system enables it to survive long periods without water, even when the surface soil completely dries out. Ber trees can grow under conditions of extreme stress from drought, salt and waterlogging and can therefore be grown on degraded or marginal lands. It produces a nutritious fruit, which is rich in the B group of vitamins (thiamin, riboflavin and niacin), vitamin C and β-carotene. Ber can provide sustained production irrespective of occurrence of drought. A number of products are produced for industry from the ber tree. There are different wild Ziziphus species and types distribute all over the southern parts of Iran, and they show a great adaptability to the dry climate conditions of the arid and semi-arid regions. The identification and evaluation of over 2500 ber trees in Khouzestan province was initiated in 2000. Twenty-nine trees have been identified as superior types. Wide variability in tree performance, yield, fruit fresh weight (2.4-19 g), fruit dry weight (0.85-4.7 g), fruit shape, fruit length (10-48 mm), fruit diameter (12-27.5 mm), fruit volume(2.2-20.2 cc), peel colour, presence or absence of seed and seed weight (0-1.3 g) were observed among the genotypes. The growth and maturity (early February-April) of fruits also showed variations among the genotypes.

Latifian M.,Date Palm and Tropical Fruits Research Institute
Emirates Journal of Food and Agriculture | Year: 2012

This research has been carried out in Khuzestan province of Iran, to evaluate the effects of cultural practices on the lesser date moth infestation in date palm. Incidentally cluster-sampling and survey research method were applied. Sampling society divided to 30 plots then one sample was selected randomly in each plot. Fifteen trees were selected randomly in each plot and their infestations were evaluated. Different cultural management factors including tillage, fertilization, irrigation, pruning, chemical control, bunch covering and bunch arrangement were evaluated using questionnaire data. Correlation analyses were performed, and then management factors that had significant correlation with pest infestation were used for further multiple regression analysis. Based on correlation analysis, it is found that, bunch remnant pruning (r =-0.61), bunch covering (r =-0.55) and chemical control (r =-0.51) had suitable effects on decreasing the lesser date moth infestation. Multiple regression analysis showed that the effect of chemical control (cc), bunch remnant pruning (bp) and bunch covering (bc) increased respectively and sum of effects decreased the pest infestation. The ultimate formula of the model is % infestation = 1.664-0.464cc-0.427bp-0.234bc (and Durbinwatsonstatistic= 1.73). Integrated effects of all three factors together are better than the effects of each alone.

Mostaan A.,Date Palm and Tropical Fruits Research Institute
Biosystems Engineering | Year: 2016

The trends in the mechanisation of date palm production were reviewed and five key obstacles were identified: structural heterogeneity, impact of economic and social factors, changing nature of production cycle, lack of innovation in crown access, and the lack of mechanisation indices. A general date palm mechanisation framework was developed which could help understanding and studying the obstacles to mechanisation and derive factors through the principal concepts of revenue loss and availability of the skilled palm-tree climbing workers. Increasing the rate of operation rate with fewer workers would advance date palm production. This trend could be encouraged through lower machinery costs and higher worker safety. Potential advantages of ground-based mechanisation methods are presented through analytical formulation of crown access methods. The ground-based approach appears to be more efficient than conventional approaches using palm climbing or elevating because it simplifies the three-dimensional nature of the working environment into less complex two dimensions. Ground-based methods have limitations due to the increased difficulty of operating in crown zone with increasing palm height. An operational index was defined to help develop the mechanisation of date palm cultivation. The index can reveal the height limits affordability for any date palm mechanisation systems. For each specific mechanisation operation there could be a minimum or maximum height limit and/or a height gap. © 2016 IAgrE.

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