rice cultivation Articles
-
Risk analysis of pesticides applied to rice paddies using RICEWQ 1.6.2v and RIVWQ 2.02
Rice is commonly cultivated in Southern Europe in large river basins where the extensive use of herbicides may impactwater quality at basin scale level. Consequently, pesticide risk assessmentwould be more relevant when considering a rice cultivation area as awhole. Accordingly, two watershed-scale scenarios were developed to represent the specific agronomic, water and pesticide management ...
-
Competitive interactions between cultivated and red rice as a function of recent and projected increases in atmospheric carbon dioxide
Because wild lines of the same species often represent a weedy constraint to cultivated crops in the field, any differential response to atmospheric carbon dioxide concentration, [CO2], may alter weed–crop competition and seed yield. We evaluated the growth and reproduction of cultivated rice (Oryza sativa L.; Clearfield, CL161) and red or weedy rice (Stuttgart, StgS) in monoculture, and at two ...
-
Microsatellite markers in and around rice genes: Applications in variety identification and DUS testing
In Brazil, rice (Oryza sativa L.) varieties adapted to different ecological regions are available on the market. However, these varieties exhibit highly similar morphologies, which makes their identification difficult. In this study we identified microsatellites in and around genes that are useful for the identification of the main rice varieties cultivated in Brazil. Thirteen microsatellites ...
-
Meeting the challenges of global rice production
Rice is the second most widely grown cereal crop and the staple food for more than half the world’s population. More than 3 billion people consume more than 100 kg of rice per year. Rice is cultivated on 155.5 million ha with an average growth rate of 0.39% a year, in the last 30 years. In the near future, the possibility for expanding areas under rice based systems will remain very limited ...
-
Lanthanum ions intervened in enzymatic production and elimination of reactive oxygen species in leaves of rice seedlings under cadmium stress
Rare earth elements (REEs) at proper concentrations were observed to alleviate heavy metal stress. However, the potential mechanisms are not clear. Thus, the present work focused on the mechanisms of lanthanum (La) ions on the generation and elimination of reactive oxygen species (ROS) production in leaves of rice seedlings hydroponically cultivated in 30 µM cadmium chloride (CdCl2) for two ...
-
Challenges and opportunities for a sustainable rice production in Europe and Mediterranean area
Rice is the second largest cereal crop grown worldwide. One-half of the world population and virtually all of East and Southeast Asia is wholly dependent upon rice. Rice production in the Mediterranean regions dates back to the seventh century. This crop was first introduced into Egypt and gradually spread, towards the fifteenth century, to most countries of the Mediterranean basin. Rice is at ...
-
Cultivation of rice for animal feed with circulated irrigation of treated municipal wastewater for enhanced nitrogen removal: comparison of cultivation systems feeding irrigation water upward and downward
To achieve enhanced nitrogen removal, we modified a cultivation system with circulated irrigation of treated municipal wastewater by using rice for animal feed instead of human consumption. The performance of this modified system was evaluated through a bench-scale experiment by comparing the direction of circulated irrigation (i.e. passing through paddy soil upward and downward). The modified ...
-
Nitrogen removal and power generation from treated municipal wastewater by its circulated irrigation for resource-saving rice cultivation
This study aims at improving the performance of the cultivating system of rice for animal feed with circulated irrigation of treated municipal wastewater by applying a larger amount of wastewater, as well as adding a microbial fuel cell (MFC) to the system. The results of bench-scale experiments indicate that this modification has increased the rice yield, achieving the target for the rice ...
-
Recent Papers on Water Reuse in Irrigation and Agriculture
The long-term goal of this research is to develop the infra-technologies to reclaim effluents from wastewater treatment plants and reuse them for agricultural water demands. The objectives of this were: 1) to study the effects of various wastewater treatment levels on crop growth and yields; 2) to determine the pollution loads from wastewater ...
-
Impacts of climate change on irrigation water requirements for rice–wheat cultivation in Bagmati River Basin, Nepal
This study highlights the spatial and temporal impacts of climate change on rice–wheat cropping systems, focusing on irrigation water requirement (IWR) in the Bagmati River Basin of Nepal. The outputs from a general circulation model (HadCM3) for two selected scenarios (A2 and B2) of IPCC and for three time periods (2020s, 2050s, and 2080s) have been downscaled and compared to a baseline ...
-
Can grains of the past help us weather storms of the future?
Combining science with traditional knowledge, researchers turn to ancient rice as a source of climate resilience In May 2009, Cyclone Aila wreaked havoc in eastern India. Clocking in at speeds of over 120 kilometers per hour, Aila hit the Sundarbans, the largest continuous block of mangrove forest in the world, located in the Ganga-Brahmaputra tidal delta on the Bay of Bengal. The storm killed ...
By Ensia
-
Rice production with minimal irrigation and no nitrogen fertilizer by intensive use of treated municipal wastewater
We designed a new cultivation system of rice with circulated irrigation to remove nitrogen from treated municipal wastewater effectively and assessed the possibility of nitrogen removal in the new system without any adverse effects on rice production through bench-scale experiments through two seasons. Overgrowth of the rice plant, which can lead to lodging and tasteless rice, was found in the ...
-
Response of upland rice cultivars to nitrogen fertilizer in the savannas of Nigeria
In the dry savannas of West Africa, cultivation of upland rice (Oryza spp.) under rain-fed conditions is expanding due to the introduction of the New Rice for Africa (NERICA; WARDA, Bouake, Cote d'Ivoire) but appropriate N recommendations for these new cultivars are lacking. The present study evaluated the response of four NERICA rice cultivars, their parents (WAB 56-104 (O. sativa, tropical ...
-
Phenotypic diversity of panicle and nutritional traits of some widely cultivated indigenous deepwater rice (Oryza sativa L.) cultivars of Dhemaji district, Assam (India)
Deepwater rice shows some morphological and nutritional peculiarities. To evaluate the phenotypic diversity in panicle and nutritional traits, ten widely cultivated indigenous deepwater rice cultivars (viz. Panikakuwa, Kakuwa, Miabao, Dalbao, Maguribao, Negheribao, Panidhan, Bhubao, Amana and Happybao) collected from different paddy growing fields of Dhemaji district, Assam, have been taken into ...
-
Uptake and distribution of Iodine in Rice plants
Rice (Oryza sativa L.) plants were cultivated in an experimental field and separated at harvest into different components, including polished rice, rice bran, hull, straw, and root. The contents of iodine in these components and the soil were determined by inductively coupled plasma–mass spectrometry and radiochemical neutron activation analysis, respectively. Iodine content varied by more than ...
-
Turning abandoned rice fields into mangroves
What do you do when mangroves fail to naturally recolonise abandoned rice fields in one of the most precious mangrove deltas of the world? Pieter van Eijk reports on a recent mission to Western Africa that paves the way for large-scale mangrove recovery through a so-called ‘ecological restoration’ approach. While small on a map, Guinea Bissau is one of the most sizeable mangrove ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you