study of effects of different stecklings planting and seed harvesting times on seed quantity and quality of shirin cultivar of sugar beet

نویسندگان

محمد‏علی چگینی

استاد یار موسسه تحقیقات چغندرقند سلیم فرزانه

کارشناس ارشد ایستگاه تحقیقات کشاورزی و منابع طبیعی اردبیل سعید صادق‏ زاده

استاد یار موسسه تحقیقات چغندرقند داریوش فتح‏ اله طالقانی

دانشیار موسسه تحقیقات چغندرقند

چکیده

in order to determine of the proper sowing date of steckling (rootlet) and harvesting date of seed, an experiment was conducted in ardabil agricultural research station (alarough) in 2004- 05 growing season in split-plot in randomized complete block design arrangement with four replications. four different planting dates viz. 5th march, 20th march, 4th april and 19th april– were allocated to the main plot and four harvest dates viz. 15, 30, 45 and 60 days to the subplots. the first harvest was conducted 15 days after 50% flowering to the subplots. results showed that the maximum number of main stems (2.7 per plant) and lateral stems (42.4 per plant) were recorded on first and second planting dates, respectively. the plant height reduced from 128.03 cm (first planting) to 106.50 (4th planting). the highest raw seed yield and coefficient of standard seed extraction was achieved at the first planting date. the harvest date had a significant effect on raw seed yield, seed size and the percent of the empty seed. also, the results showed that the highest raw seed yield (2735.8 kg/ha) and the percent of seeds with the size of 3.5- 4.5 mm (36.3%) was obtained from the 3rd harvesting date. the first harvesting date had the highest percent of the empty seed (17.2%). it is recommended that the beet steckling to be planted at the first possible date (in march) and the seed to be harvested at least 45 days after 50% flowering.. the total plant dry weight on first, second, third, and fourth planting dates were 389.6, 409.14, 344.9 and 300.9 g/plant, respectively. among harvest dates, harvest at 45 days after flowering led to significant increase in plant dry weight, seed dry weight and seed yield (2735.8 kg/ha). seeds harvested at 15 days after flowering had 60% of a normal seed size which was less than 3.5 mm (unusable) compared with seeds harvested at 45 days after flowering. also, the highest rate of unfilled seed (%17.2) was obtained on the first seed harvest date.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

effect of seed priming and irrigation regimes on yield,yield components and quality of safflowers cultivars

این مطالعه در سال 1386-87 در آزمایشگاه و مزرعه پژوهشی دانشگاه صنعتی اصفهان به منظور تعیین مناسب ترین تیمار بذری و ارزیابی اثر پرایمینگ بر روی سه رقم گلرنگ تحت سه رژیم آبیاری انجام گرفت. برخی از مطالعات اثرات سودمند پرایمینگ بذر را بر روی گیاهان مختلف بررسی کرده اند اما در حال حاضر اطلاعات کمی در مورد خصوصیات مربوط به جوانه زنی، مراحل نموی، عملکرد و خصوصیات کمی و کیفی بذور تیمار شده ژنوتیپ های م...

the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance

this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...

15 صفحه اول

study the effects of low level laser diode on no production and healing of diabetic and cortisone acetate and normal wounded sd rats

nitric oxide (no) is a small molecule synthesized by most of mammalian cells with diverse biological activities including vasodilatation, host defense and wound healing. impaired wound healing is a common occurrence among diabetics and patients receiving glucocorticoid therapy. on the other hand the application of laser in biomedical area have been increased. thus, the current studies were desi...

15 صفحه اول

effects of first language on second language writing-a preliminary contrastive rhetoric study of farsi and english

to explore the idea the investingation proposed, aimed at finding whether the performances of the population of iranians students studying english in an efl context are consistent in l1 and l2 writing taks and whether there is a cross-linguistic transfer in this respect. in this regard the subjects were instructed to write four compositions-two in english and two in farsi-which consisted of an ...

15 صفحه اول

the effects of time planning and task complexity on accuracy of narrative task performance

هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
چغندرقند

جلد ۲۹، شماره ۲، صفحات ۲۰۱-۲۱۴

کلمات کلیدی
[ ' i n o r d e r t o d e t e r m i n e o f t h e p r o p e r s o w i n g d a t e o f s t e c k l i n g ( r o o t l e t ) a n d h a r v e s t i n g d a t e o f s e e d ' , ' a n e x p e r i m e n t w a s c o n d u c t e d i n a r d a b i l a g r i c u l t u r a l r e s e a r c h s t a t i o n ( a l a r o u g h ) i n 2 0 0 4 ' , ' 0 5 g r o w i n g s e a s o n i n s p l i t ' , ' p l o t i n r a n d o m i z e d c o m p l e t e b l o c k d e s i g n a r r a n g e m e n t w i t h f o u r r e p l i c a t i o n s . f o u r d i f f e r e n t p l a n t i n g d a t e s v i z . 5 t h m a r c h ' , ' 2 0 t h m a r c h ' , ' 4 t h a p r i l a n d 1 9 t h a p r i l w e r e a l l o c a t e d t o t h e m a i n p l o t a n d f o u r h a r v e s t d a t e s v i z . 1 5 ' , 3 0 , ' 4 5 a n d 6 0 d a y s t o t h e s u b p l o t s . t h e f i r s t h a r v e s t w a s c o n d u c t e d 1 5 d a y s a f t e r 5 0 % f l o w e r i n g t o t h e s u b p l o t s . r e s u l t s s h o w e d t h a t t h e m a x i m u m n u m b e r o f m a i n s t e m s ( 2 . 7 p e r p l a n t ) a n d l a t e r a l s t e m s ( 4 2 . 4 p e r p l a n t ) w e r e r e c o r d e d o n f i r s t a n d s e c o n d p l a n t i n g d a t e s ' , ' r e s p e c t i v e l y . t h e p l a n t h e i g h t r e d u c e d f r o m 1 2 8 . 0 3 c m ( f i r s t p l a n t i n g ) t o 1 0 6 . 5 0 ( 4 t h p l a n t i n g ) . t h e h i g h e s t r a w s e e d y i e l d a n d c o e f f i c i e n t o f s t a n d a r d s e e d e x t r a c t i o n w a s a c h i e v e d a t t h e f i r s t p l a n t i n g d a t e . t h e h a r v e s t d a t e h a d a s i g n i f i c a n t e f f e c t o n r a w s e e d y i e l d ' , ' s e e d s i z e a n d t h e p e r c e n t o f t h e e m p t y s e e d . a l s o ' , ' t h e r e s u l t s s h o w e d t h a t t h e h i g h e s t r a w s e e d y i e l d ( 2 7 3 5 . 8 k g / h a ) a n d t h e p e r c e n t o f s e e d s w i t h t h e s i z e o f 3 . 5 ' , ' 4 . 5 m m ( 3 6 . 3 % ) w a s o b t a i n e d f r o m t h e 3 r d h a r v e s t i n g d a t e . t h e f i r s t h a r v e s t i n g d a t e h a d t h e h i g h e s t p e r c e n t o f t h e e m p t y s e e d ( 1 7 . 2 % ) . i t i s r e c o m m e n d e d t h a t t h e b e e t s t e c k l i n g t o b e p l a n t e d a t t h e f i r s t p o s s i b l e d a t e ( i n m a r c h ) a n d t h e s e e d t o b e h a r v e s t e d a t l e a s t 4 5 d a y s a f t e r 5 0 % f l o w e r i n g . . t h e t o t a l p l a n t d r y w e i g h t o n f i r s t ' , ' s e c o n d ' , ' t h i r d ' , ' a n d f o u r t h p l a n t i n g d a t e s w e r e 3 8 9 . 6 ' , ' 4 0 9 . 1 4 ' , ' 3 4 4 . 9 a n d 3 0 0 . 9 g / p l a n t ' , ' r e s p e c t i v e l y . a m o n g h a r v e s t d a t e s ' , ' h a r v e s t a t 4 5 d a y s a f t e r f l o w e r i n g l e d t o s i g n i f i c a n t i n c r e a s e i n p l a n t d r y w e i g h t ' , ' s e e d d r y w e i g h t a n d s e e d y i e l d ( 2 7 3 5 . 8 k g / h a ) . s e e d s h a r v e s t e d a t 1 5 d a y s a f t e r f l o w e r i n g h a d 6 0 % o f a n o r m a l s e e d s i z e w h i c h w a s l e s s t h a n 3 . 5 m m ( u n u s a b l e ) c o m p a r e d w i t h s e e d s h a r v e s t e d a t 4 5 d a y s a f t e r f l o w e r i n g . a l s o ' , ' t h e h i g h e s t r a t e o f u n f i l l e d s e e d ( % 1 7 . 2 ) w a s o b t a i n e d o n t h e f i r s t s e e d h a r v e s t d a t e . ' ]

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023