اثر زمان برداشت بر عملکرد ریشه و برخی خصوصیات کیفی ارقام تجارتی چغندرقند در خوی

محورهای موضوعی : توليد محصولات زراعي

زهرا حبيبي ¹

1 - دانشگاه آزاد اسلامی، واحد خوی، دانش آموخته کارشناسی ارشد زراعت، خوی، ایران

تاریخ دریافت : 1389/07/05 تاریخ پذیرش : 1390/08/08 تاریخ انتشار : 1389/07/17

کلید واژه: ارقام, تاریخ برداشت, چغندرقند, عملکرد ریشه و عیار قند,

چکیده مقاله :

به منظور مطالعه تاثیر زمان برداشت بر روی برخی خصوصیات کمي و کیفی چغندرقند، سه تاریخ برداشت (30 مهر، 15 آبان و30 آبان) بر روی پنج رقم هیبرید چغندرقند (افشاری، زرقان، شیرین، رسول و جلگه) مورد بررسی قرار گرفت. این تحقیق به صورت آزمایش فاکتوریل با طرح پایه بلوک های کامل تصادفی در سه تکرار طی سال 1388 در ایستگاه تحقیقات کشاورزی شهرستان خوی اجرا شد. کشت در اواخر فروردین ماه و عملیات داشت بر اساس توصیه ها و به صورت یکنواخت برای همه تیمارها انجام شد. نتایج نشان داد که بین ارقام اختلاف معنی داری از نظر درصد قند، درصد قند سفید، ضریب قلیائیت و مقدار ناخالصی های سدیم و نیتروژن وجود داشت. رقم رسول درصد قند و قند سفيد بیشتری نسبت به سایر ارقام داشت. اختلاف بین تاریخ های برداشت نیز از نظر عملکرد ریشه، درصد قند، قند سفيد ، عملکرد قند ناخالص و عملکرد قند سفید معنی دار بود. حداکثر عملکرد ریشه در برداشت 30 آبان به میزان 360/94 تن در هکتار به دست آمد. بیشترین درصد قند و قند سفيد نيز مربوط به تاریخ برداشت 30 آبان بود. همچنين بالاترین عملکرد قند خام و محصول قند سفید نیز به ترتیب با 98/12 تن و 34/10 تن در هکتار متعلق به تاريخ برداشت 30 آبان بود که نسبت به دو تاریخ برداشت دیگر، اختلاف معنی دار داشت.

چکیده انگلیسی:

To study the effect of harvesting time on the quantity and quality of sugar beet, 3 harvest dates (October 22nd, November 6th& November 21st) and on the five varieties of sugar beet (Afshari, Zarghan, Shirin, Rasul& jolgheh) were evaluated. The study was conducted in factorial experiment based on complete block design with three replications in Khoy Agricultural Research Center during 2009. Cultivation operations in mid-April, based on recommendations and the same for all treatments were performed. Analysis of variance showed significant differences between cultivars in terms of sugar content, white sugar content, alkality, sodium and nitrogen impurities. Variety of Rasul sugar content and white sugar content was more than other varieties. The difference between harvesting dates of the root yield, sugar content, white sugar content, white sugar yield and sugar yield was significant. November 21st harvest root yield found with 94.360 tons per hectare more than previous harvest dates. The highest sugar content, white sugar content was related to the date of November 21st and was higher than other harvest dates. The highest sugar yield and white sugar yield respectively, 12.98 and 10.34 tons per hectare belonged to November 30th harvest. That was of significant difference rather than two other dates.

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