نتایج جستجو برای: paddy growth

تعداد نتایج: 824156  

Journal: :International Letters of Natural Sciences 2015

Journal: :مهندسی بیوسیستم ایران 0
هادی عظیمی نژادیان دانشجو تیمور توکلی هشجین دانشگاه تربیت مدرس برات قبادیان دانشگاه تربیت مدرس سید سالار حسینی دانشجو

abstractin this study, the tensile force requirement, to separate the grain paddy was measured. the velocities of grain paddy it 100, 200, 300, 400, and 500 mm/min, and force requirement to failure stem at 100, 300, and 500 mm/min velocities was measured by using instron device. the data was analyzed using a completely randomized design. the results showed that velocity had a significant effect...

2015
Kuikui Ni Yanping Wang Dongxia Li Yimin Cai Huili Pang

There has been growing interest to develop forage rice as a new feed resource for livestock. This study was to characterize the natural population of lactic acid bacteria (LAB) and select potentially excellent strains for paddy rice silage preparation in China. One hundred and twenty-six strains were isolated and screened from paddy rice silage prepared using a small-scale fermentation system, ...

2015
Gourav Sharma Asma Khan Surender Singh Ashok Kumar Anand

AIM The aim was to assess the efficacy of pine leaves as an alternative bedding material on the performance of broiler chicks. MATERIALS AND METHODS The present study was conducted in summer. Total 120, day old Vencobb straight run chicks were procured, and after 5 days of brooding, chicks were randomly distributed into four treatment groups viz. paddy husk (Group I), paddy straw (Group II), ...

Journal: :علوم گیاهان زراعی ایران 0
محمدجواد گل محمدی دانشجوی سابق کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسن علیزاده استاد ، پردیس کشاورزی و منابع طبیعی دانشگاه تهران بیژن یعقوبی استادیار مؤسسه تحقیقات برنج کشور- رشت مجید نحوی مربی، مؤسسه تحقیقات برنج کشور- رشت مصطفی اویسی استادیار، پردیس ابوریحان، دانشگاه تهران

barnyardgrass has always been considered as the most important weed of rice all over the world. meanwhile, establishment of new species of this genus which is more adaptable to paddy ecosystem will increase the importance of this genus as a new threat to rice. in order to evaluate the competition of two species of barnyardgrass with rice, an experiment was conducted at rice research institute o...

2016
Dongyan Liu Kanako Tago Masahito Hayatsu Takeshi Tokida Hidemitsu Sakai Hirofumi Nakamura Yasuhiro Usui Toshihiro Hasegawa Susumu Asakawa

Elevated concentrations of atmospheric CO2 ([CO2]) enhance the production and emission of methane in paddy fields. In the present study, the effects of elevated [CO2], elevated temperature (ET), and no nitrogen fertilization (LN) on methanogenic archaeal and methane-oxidizing bacterial community structures in a free-air CO2 enrichment (FACE) experimental paddy field were investigated by PCR-DGG...

Journal: :Environmental science & technology 2004
Yoshio Takahashi Reiko Minamikawa Kéiko H Hattori Katsuaki Kurishima Nobuharu Kihou Kouichi Yuita

The behavior of As in paddy fields is of great interest considering high As contents of groundwater in several Asian countries where rice is the main staple. We determined the concentrations of Fe, Mn, and As in soil, soil water, and groundwater samples collected at different depths down to 2 m in an experimental paddy field in Japan during the cycle of flooded and non-flooded periods. In addit...

Journal: :Chemosphere 2012
Wen-Ming Hsu Hsing-Cheng Hsi You-Tuan Huang Chien-Sen Liao Zeng-Yei Hseu

The accumulation of As in rice due to groundwater irrigation in paddy fields represents a serious health hazard in South and Southeast Asia. In Taiwan, the fate of As in long-term irrigated paddy fields is poorly understood. Groundwater, surface soil, and rice samples were collected from a paddy field that was irrigated with As-containing groundwater in southwestern Taiwan. The purpose of this ...

2017
Annika Vaksmaa Theo A. van Alen Katharina F. Ettwig Elisabetta Lupotto Giampiero Valè Mike S. M. Jetten Claudia Lüke

Paddy fields are important ecosystems, as rice is the primary food source for about half of the world's population. Paddy fields are impacted by nitrogen fertilization and are a major anthropogenic source of methane. Microbial diversity and methane metabolism were investigated in the upper 60 cm of a paddy soil by qPCR, 16S rRNA gene amplicon sequencing and anoxic 13C-CH4 turnover with a suite ...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
فاطمه رزاقی بورخانی دانشجوی دکتری دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران احمد رضوانفر استاد دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران حسین شعبانعلی فمی دانشیار دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران

the main purpose followed in the ongoing research was to investigate the role of the extension factors (experience of familiarity with agricultural extension services, participation of paddy farmers in extension - educational courses, their participation in farmer field school (ffs) programs, and their number of extension contacts regarding ipm) in the adoption of ipm technology among paddy far...

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