مقایسه عملکرد، اجزای عملکرد و نیترات موجود در برخی توده‌های اسفناج در استان اصفهان

نوع مقاله : مقالات پژوهشی

نویسندگان

مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان

چکیده

این مطالعه به منظور بررسی روند تغییرات عملکرد و اجزای عملکرد ده توده/رقم اسفناج، پژوهشی به مدت 2 سال (1394- 1393) با استفاده از طرح بلوک‌های کامل تصادفی با سه تکرار در استان اصفهان انجام شد. مقایسه میانگین صفات عملکرد، طول برگ، طول دمبرگ و ارتفاع (در سطح احتمال 1 درصد) و تعداد برگ و مقدار نیترات (در سطح احتمال 5 درصد) از نظر آماری معنی دار بود. توده بذر خاردار ورامین با عملکرد 49/53 تن در هکتار محصول تازه، بیشترین مقدار عملکرد را به خود اختصاص داد. دامنه تغییرات ارتفاع بوته از 24 سانتی متر در توده ساری تا 33/30 سانتی متر در توده نجف آباد متفاوت بود. توده اردستان با 67/10 برگ کمترین تعداد برگ در بین توده‌ها/ ارقام مطالعه شده را داشت. طول دمبرگ در بین ارقام/ توده ها‌ی آزمایش شده دامنه ای از 84/9 تا 33/18 سانتی متر داشت. توده برگ پهن ورامین به ترتیب با مقادیر نیترات پهنک و دمبرگ معادل 231 و 462 قسمت در میلیون، کمترین و رقم آلمانی به ترتیب با نیترات پهنک و دمبرگ معادل 583 و 1182 قسمت در میلیون بیشترین مقادیر نیترات را به خود اختصاص دادند. با توجه به نتایج بدست آمده در این پژوهش از میان توده های آزمایش شده توده های بذر خاردار ورامین، برگ پهن ورامین، ساری و نجف آباد از جمله توده‌هایی هستند که می‌توانند عملکردی مشابه رقم برگ پهن آلمانی تولید نموده و برای تولید اسفناج در استان اصفهان مورد استفاده قرار گیرند.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Yield, Yield Components and Nitrate in Some Spinach Landraces in Isfahan Province

نویسندگان [English]

  • peyman jafari
  • Amirhooshang Jalali
Agricultural and Natural Resources Research and Education Center of Isfahan
چکیده [English]

Introduction: Spinach (Spinaciaoleracea L.) is considered as a green leaf with fresh and canned consumption, a significant source for vitamin C, vitamin A, carotenoids, flavonoids, folic acid, calcium and magnesium.According to statistics, 4479 hectares of Iran agricultural land were devoted to spinachand the average yield per hectare is equal to 42.18(FAO, 2014).Different regions of Iran havegenetic diversity of the spinach landraceand cultivation of this plant relieson the use of the landraces.Among the different spinach landraces, a landracescalled seed barbed (Spiny), has a significantimportancebecause of some desirable characteristics.Thisstudy was conductedfor comparison of five spinach landracein Isfahan, showedthat spiny seed Varamin with 47.8 tons per hectare fresh yield allocated the highest yield.The number and size of leaves and side branches are the most important components of plant yield.Due to the fact that about 70 percent of total dietary nitrate intake per person per day will be provided through the leafy vegetables,considering the amount of accumulated nitrate in spinach is very important.To evaluate the yield and yield components of eight Iranian spinachlandrace, and two varieties of leafy American and German experiment was conducted for two years.
Materials and Methods This research was performedfor two years, in Kabootarabad Agricultural Research Station of Isfahan to evaluate the yield and yield components of eight Iranian spinachlandraces(Varamin prickly seed, Sari, Ghaemshahr, Babul, Kashan, Najaf Abad, Varamin 88 andArdestān), and two American and German leafy cultivars. Randomized complete block design with three replications was usedfor each year and the results were reported based on two-year combined data analysis. In full leaf development stage and before the harvest of each plot, 10 plants randomly were selected and measured attributes: number of leaves, leaf length, leaf width and length of the petiole. In order to assess yield, after removing two distance of half a meter from each side, two central rows of plants per plot (surface equivalent to two square meters) were analyzed. Nitrate content of samples wasanalyzed using ion analyzer. Data statistical analysiswas performed using SAS software and means were compared by Duncan’s multiple rangetest at 5% probability level.

Result and DiscussionsYield, leaf length, petiole length and height (at 1% statistical probability level) and number of leaves and nitrate content (at 5% statistical probability level) were statistically significant. Spiny seed Varamin with 53.49 t ha-1 fresh yield, produced to the highest yield. In other research according to the environmental conditions and variety, spinach fresh yield have been reported from 18.6 to 44.8 t ha-1. It looks different mass spinach; produce the highest yield in specific geographic environments. In a similar study that was conducted underIsfahan weather conditions, spiny seed Varaminlandraceproduced 47 830 kg ha-1 fresh yield. Range in plant height was from 24 cm to 30.33 cm in Najaf Abad, and Sari landraces, respectively. When spinach was encountered with optimal climate conditions, achieved the maximum height that led toa positive impact on fresh yield. Ardestānlandrace produced the lowest number of leaves (10.67)among the landraces/varieties had been studied. In a similar study of 29 spinach genotypes the leaf number were varied from 12 to 23. Petiole length range between varieties/landraces was from 9.84 to 18.33 cm. Although the petiole length, is a desired trait for mechanized harvesting, but in case of improper management of nitrogen fertilizer can be considered as an undesirable trait. Leafy Varaminlandracewith 231 and 462 ppm nitrate in blade and petiole, respectively, had the lowest and German cultivar with 583 and 1182 ppm nitrate in blade and petiole, respectively, had the highest nitrate accumulation. Despite the differences between the varieties/landraces,the contentof nitrate in petioles was greater than the leaf blade (about 1.6 times) in spinach. Higher concentrations of petiole nitrate compared to the blade considered in many research, and in caseof poor management fornitrogen fertilizers, it may increase up to6 times. In any case, leafy cultivars such as German have been modified for mechanized cultivation and have long petiole with nitrate content. That's why their petioles are separated in the industrialprocessing. It is better fresh petioles of spinach isolated or sufficiently boiled to reduce nitrate levels. According to the results obtained in this study among the examined populations of spiny seed Varaminlandraces, leafy Varamin, Najaf Abad, and Sari can produce yields similar toGerman variety and so are suitable for the production of spinach in Isfahan province.

کلیدواژه‌ها [English]

  • Leaf blade
  • Petiole
  • Plant height
1- Amoli N. 2012. Preliminary comparison of land race selected and common variety spinach. International Journal of Agriculture and Crop Science. 4:1466-1471.
2- Asadi H., and Hasandokht M.2007. Study of genetic diversity on Iranian spinach genotypes. Journal of Agricultural Sciences 38:257-265 (In Persian).
3- Boese S.R., and Huner N.P.A.1990. Effect of growth temperature and temperature shifts on spinach leaf morphology and photosynthesis. Plant Physiology, 94:1830-1836.
4- Eftekhari A., Hasandokht M., Fatahimoghadam and M., Kashi A. 2010. Genetic diversity of Iran native spinach using morphological characters. Iranian journal of horticultural science 41:83-93.( In Persian).
5- FAOSTAT .2015. Food and Agriculture Organization of the United Nations FAO STAT data. http://faostat.fao.org/.(visited 5 September 2015).
6- Jafari P., and Jalali A.H. 2015. Yield and nitrate accumulation comparison in five Iranian spinach landraces in Isfahan province. Journal of Crop Production and Processing, 13:217-225 (In Persian).
7- He J., Cheok L., and Qin L. 2011. Nitrate accumulation, productivity and photosynthesis of temperate butter head lettuce under different nitrate availabilities and growth irradiances. The Open Horticulture Journal, 4: 17-24.
8- Koh E., Charoenprasert S. and Mitchell A.E. 2012. Effect of organic and conventional cropping systems on ascorbic acid, vitamin C, flavonoids, nitrate, and oxalate in 27 varieties of spinach (Spinacia oleracea L.). Journal of agricultural and Food Chemistry, 60:3144-3150.
9- Maroufi K., Farahani H.A., and Moaveni P. 2011. Effects of hydropriming on seedling vigor in spinach. Advances in Environmental Biology 5:2224-2227.
10- Meah M.N., Harrison N. and Davies A. 1994. Nitrate and nitrite in foods and the diet. Food and Additives and Contaminants. 11:519-532.
11- Ors S. and Suarez D.L. 2016. Salt tolerance of spinach as related to seasonal climate. Hort. Sci. (Prague), 43: 33-41.
12- Sabaghnia N., Mohebodini M., Janmohammadi M, and Maragheb I. 2016. Bibelot Analysis of trait relations of Spinach landraces. Genetika, 48:675-690.
13- SAS Institute. 2010. SAS user’s guide. SAS Inst., Cary, NC.
14- Scientific Committee on Food. 1995. Opinion on nitrate and nitrite, Annex 4 to Document III/5611/95, European Commission (ed.), Brussels, p. 20.
15- Shahid Umar A., Iqbal A. and Abrol Y.P. 2007. Are nitrate concentrations in leafy vegetables within safe limits? Current Science 92:355-360.
16- Sobhani Ardekani S., Shayesteh K., Afuni M., Mahbube Sufiani N. 2005. Concentration of nitrate in some plant products of Isfahan. Journal of Environmental Studies 37:69-76. (In Persian).
17- Sušin J., Kmecl V., and Gregorčič A. 2006. A survey of nitrate and nitrite content of fruit and vegetable grown in Slovenia during 1996-2002. Food Additives and Contaminants 23: 385-390.
18- Waseem K., and Nadeem M.A .2001. Enhancement of spinach production by varying sowing dates, row spacing and frequency of cuttings. Journal of Biological Science 1: 902-904.
19- WHO. 1978. Nitrates, nitrates and N-Nitrozo compounds. Geneva, Environmental Health Criteria 5.
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