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2006, Journal of Agriculture Rural Development
2018 •
The impact of sowing dates and proper fertilization particularly nitrogen (N) on rice cultivation assumes pivotal significance. The dates of sowing and nitrogen fertilization have remained unequivocally the most important agronomic factors for obtaining optimum rice yields and will assume much higher importance under changing climatic conditions. Sowing time is a major factor in rice cultivation and indirectly determines soil temperature and weather conditions to which young seedlings and rice plants are exposed during different development stages. Moreover, an optimum sowing date in a particular ecological setting enables accumulation of desired growing degree days necessary for proper growth and development of rice crop. The optimum transplanting date is different in different agro-ecological settings. Under the temperate climatic conditions where crop growing season is generally short and sharp decline in temperature is noticed later in the season which is detrimental for crop growth, planting time assumes much greater importance. Similarly, optimum levels of nitrogen fertilization form an important aspect of overall fertilizer management in rice for its efficient utilization and higher productivity. Nitrogen fertilizer is a key input for rice production. Excess amount of N application can resu lt in lodging of plant, greater susceptibility to pest infestation and reduction of yield. On the contrary, below optimum doses of N may affect different aspects of rice growth and will lead to stunted crop growth and lower yield, so judicious application of N is significant for obtaining optimum rice yields
Bangladesh is frequently cited as one of the most vulnerable countries to climate change. A study was undertaken to study the effects of climate change on rice (Oryza sativa L.) production in Bangladesh. The book was prepared by accommodating the findings from different researchers. Different vulnerable regions of climate change were included in the study and effects of different climatic parameters on rice yield were studied. Climatic factors such as temperature, rainfall, atmospheric CO2, solar radiation are closely link with rice production. Climate directly influences the physiological processes of rice plant’s growth, development and grain formation. Indirectly, climate influences the incidence of crop pests, diseases and hence, and grain yields.
Conservation agriculture (CA) can work to sustain the productivity of cropping systems in India. The principles of CA are minimum soil disturbance, keeping a permanent soil cover combined with adequate crop diversification or rotation. This paper will discuss how these principles are helpful for managing the diverse weed flora in different cropping systems and future management strategies. The implementation of permanent zero tillage could reduce the weed seed bank as compared to disturbed soils, and less weeds could emerge in the succeeding year. Residue retention, or the inclusion of cover crops, like sesbania, cowpea, and mungbean, has added the advantage of weed control under zero tillage. Crop residue and cover crops reduce weed germination and emergence by altering the soil temperature, release of phytototoxins, soil pH and sunlight (intensity and quality), and by increasing the population of beneficial insects that consume weed seeds. Cover crops suppress the weed growth by c...
Highlights: • Use of perching, sweeping, and need based insecticide (IPM technique) useage produce at par yields compared to prophylactic insecticide useage in rice fields. • There exists a technique that can reduce 75% of insecticide useage in rice field. • The results were obtained in cooperation between smallholder rice farmers and researchers of Bangladesh. Currently rice protection from insect pests solely depends on chemical pesticides which have tremendous impact on biodiversity, environment, animal, and human health. To reduce their impact from our society we need to cut pesticide use from agricultural practices. To address this issue, we did an experiment to identify realistic solutions that could help farmers build sustainable crop protection systems and minimize useage of insecticides and thus reduce the impact of pesticides in the environment. Innovations developed jointly by farmers and researchers and evaluated for their potential to be adopted by more farmers. In this paper we tested four management practices jointly with smallholder farmer fields in order to select the best one. Four management practices were used namely, T 1 = Prophylactic use of insecticide where insecticide was applied in rice field at every 15 days interval without judging the infestation level; T 2 = Perching (that is, placing roosting (perching) sites for insectivorous birds within the rice field) and concurrent sweep net samples along with need-based insecticide application; T 3 = Perching only; and T 4 = Farmer's own practices. The results revealed that routine application of insecticides for crop protection is not mandatory which is commonly found at use in rice farmers. In our experiment, where prophylactic method or farmers used 3–4 times insecticides without judging the insect pests infestation level, the similar pest population was found when compared to the field where insecticide was not applied. Our management system reduced by 75% the use of insecticides even if the field was infested with an insect pest. Predatory insects were higher in numbers than that of insecticide treated fields. We conclude farmers' should refrain insecticide applications up to 30–40 days after transplanting to enhance higher predatory arthropod population numbers, which might check pest populations in
A study was conducted on transplanted aman rice (cv. BINA dhan-7) in strip-tilled non-puddled field with some commonly used rice herbicides (pre-emergence: pyrazosulfuron-ethyl and butachlor, early post-emergence: orthosulfamuron and late post-emergence: acetochlor + bensulfuron methyl, butachlor + propanil and 2,4-D amine) applied singly or in sequences during 2013 and 2014 at field laboratory, Bangladesh Agricultural University, Mymensingh to evaluate the effect of those herbicides on weeds as well as growth and yield of aman rice in strip-tilled non-puddled condition. The study showed that herbicides significantly reduced weed density by 75-94% in 2013 and 46-98% in 2014 compared to the weedy check. Sole application of pre- or early post-emergence herbicide provided less weed control than sequential application of pre-, early post- and late post-emergence herbicides or application of pre- and late post-emergence herbicides. A wide range of sequential application of herbicide treatments has identified in the study that provided control on weed density and biomass by 49-98% and 56-95%, respectively. Application of pyrazosulfuron-ethyl followed by orthosulfamuron and butachlor + propanil was the most effective combination in this new rice establishment condition that controlled all types of weeds successfully and provided maximum grain yield (5.42 t ha-1 in 2013 and 6.18 t ha-1 in 2014) with highest economic return (Tk. 55930 ha-1 in 2013 and Tk. 69057 ha-1 in 2014). The study suggests economically beneficial some combinations of currently used herbicides for strip-tlled non-puddled transplanted aman rice that may help farmers to choose and rotate in the same land yearwise for obtaining optimum yield.
The Professional …
The CERES‐Rice Model‐Based Estimates of Potential Monsoon Season Rainfed Rice Productivity in Bangladesh*2003 •
Nazmus Salahin, Bari Mr. Md Harun-ur Rashid Director General, Taslima Zahan, Ilias Hossain, Aftabuz Zaman, Saroj Shoeb, Joseph Mutua, Pulin Chakraborty, Pravat Roul, MD. OMAR Ali, Mrityunjoy Biswas, Jagadish Timsina, Dr Shahab Pathan, Israil Hossain, Ross Brennan, Ataur Rahman, Anwar Hossen, Nazimuddin Mondal, Md. Khairul Alam, APURBO CHAKI, sobhan Abdus, Dilip Das, Mohammed Kader, Roland Issaka, Richard Bell
Crop Protection
Whiteheads associated with stem borer infestation in modern rice varieties: an attempt to resolve the dilemma of yield losses1997 •
2018 •
Applied Ecology and Environmental Sciences
Climate Change Perception and Adaptation Options for Agriculture in Southern Khulna of Bangladesh2014 •
2015 •
Journal of Entomology
Effectiveness of Different Approaches of Chemical and Biological Control Against Brown Plant Hopper, Nilaparvata lugens (Stai.)2006 •
Integrated Pest Management Reviews
Pests of Deepwater Rice and their Management1999 •
2015 •
2010 •
Final Report, ACIAR …
Nutrient and Water Management for Sustainable Rice-Wheat Cropping Systems in Bangladesh and Australia2002 •
2018 •
2016 •
2010 •
Journal of Bioscience and Agriculture Research
Morpho-physiological characters and shoot reserve remobilization of rice under different planting dates2019 •
2010 •