effects of nitrogen and harvesting date on fertilizer use efficiency and qualitative and quantitative yield of sorghum bicolor

نویسندگان

روشن جعفری بیله سوار

دانشجوی کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه آزاد اسلامی واحد میانه، میانه رئوف سید شریفی

دانشیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل علی اکبر ایمانی

استادیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه آزاد اسلامی واحد اردبیل، اردبیل

چکیده

in order to study the influence of nitrogen and different harvesting dates on sorghum yield, a split plot experiment based on randomized complete block design was conducted with three replications in 2010 at the research farm of islamic azad university, ardabil branch. factors were: different harvesting dates in three levels containing, beginning of flowering, two and four weeks after beginning of flowering and nitrogen fertilizer in four levels (zero, 60, 120 and 180 kg n.ha-1). the results showed that maximum of forage yield was obtained by the plots which were applied 180 kg n.ha-1 in four weeks after beginning flowering and the least of it was in no application of nitrogen fertilizer in beginning of flowering. means comparison showed that the highest nitrogen use efficiency was obtained by the plots which was applied 60 kg n.ha-1 in four weeks after beginning flowering and the least of it was in application of 180 kg n.ha-1 × beginninig of flowering. maximum of stem and leaf protein was obtained in the highest of nitrogen fertilizer rates. it seems that in order to increasing of forage yield, should be applied 180 kg n.ha-1 × four weeks after beginning flowering in climate conditions of ardabil. if the aim is to improve nitrogen use efficiency, then applying 60 kg n.ha-1 in four weeks after beginning flowering can be suggested.

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...

Integrated Effect of Nitrogen Fertilizer and Vermicompost on Quantitative and Qualitative Traits of Sorghum (Sorghum bicolor L.) Under Water Stress Situation

BACKGROUND: Management of water deficit is a great factor to sustainable crop production, especially in arid and semi-arid regions. Vermicompost is an organic compound that is microbial active and rich in nutrients that results from the interaction of earthworms and microorganisms with organic matter decomposition. OBJECTIVES: This research was carried out to ...

متن کامل

Effect of Plant Density and Nitrogen Fertilizer on Some Attribute Ofgrain Sorghum (Sorghum Bicolor (L.) Moench)

A field experiment was conducted in 2010, to evaluate the effects of plant density (D1, D2 and D3: 8, 14 and 20 plant/m2) on field performance of Sorghum under different nitrogen application rates (N1, N2 and N3: application of 40, 80 and 120 kg/ha Nitrogen, respectively). The experiment was arranged as factorial based...

متن کامل

Effect of Plant Density and Nitrogen Fertilizer on Some Attribute Ofgrain Sorghum (Sorghum Bicolor (L.) Moench)

A field experiment was conducted in 2010, to evaluate the effects of plant density (D1, D2 and D3: 8, 14 and 20 plant/m2) on field performance of Sorghum under different nitrogen application rates (N1, N2 and N3: application of 40, 80 and 120 kg/ha Nitrogen, respectively). The experiment was arranged as factorial based...

متن کامل

the effects of previewing and providing background knowledge on iranian university efl learners’ comprehension of literary and academic texts

abstract poor reading comprehension can result in failure in using references, benefiting from professional gatherings and resources, keeping up with the growing body of knowledge in the virtual world of the internet, and failing to achieve in efl programs. the purpose of the present quasi-experimental study was to explore the effects of background knowledge and previewing narrative and expos...

15 صفحه اول

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

منابع من

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


عنوان ژورنال:
به زراعی کشاورزی

جلد ۱۴، شماره ۲، صفحات ۱۷-۳۰

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

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023