rice paddy Articles
-
A simple approach to assess N load capacity of rice paddy fields in the southern Taihu Lake watershed
High nitrogen (N) leaching from irrigated agricultural soils is the result of N input exceeding soil N load capacity (NLC). A simple approach was developed in this research to assess the NLC of paddy soils in the southern Taihu Lake watershed. Paddy soils were classified into four types (Submergenic, Illuvium, Gleyed, and Percogenic) and 28 soil samples representing all four types were ...
-
Kinetic distribution of 14C-Metsulfuron-Methyl residues in paddy soils under different moisture conditions
Rice paddy soils undergo several cycles of drying and wetting during a growing season. A laboratory study was conducted to determine the effect of soil moisture conditions on the distribution and kinetics of extractable and bound residues of 14C-metsulfuron-methyl in six Chinese paddy soils during 84 d of incubation at 15°C with moisture contents varying from 20 to 50% of the field water-holding ...
-
Effect of straw leachates from Cry1Ca‐expressing transgenic rice on the growth of Chlorella pyrenoidosa
Because of the prevalence of algae in rice paddy fields, they will be exposed to Bacillus thurigiensis (Bt) proteins released from Bt protein‐expressing genetically engineered rice. To assess the effects of leachates extracted from Cry1Ca‐expressing transgenic rice (T1C‐19) straw on the microalga Chlorella pyrenoidosa, we added purified Cry1Ca (10, 100, 1000 µg/L) and five concentrations of ...
-
Save and Grow: Pesticide Risk Reduction for Sustainable Intensification of Rice Production
Outline Presentation Background: Agricultural Scenario (2010-2050) & Crop Intensification Risks =>indiscriminate use of agrochemicals in rice paddy systems Overview FAO Intervention: Integrated Approach for Pesticide Risk Reduction Farmer Ecosystem-Literacy Education: Farmers Field School Case Study: Philippines: Sustainable Intensification of Rice Production Concluding Notes & ...
-
Save and Grow: Pesticide Risk Reduction for Sustainable Intensification of Rice Production
Outline Presentation Background: Agricultural Scenario (2010-2050) & Crop Intensification Risks =>indiscriminate use of agrochemicals in rice paddy systems Overview FAO Intervention: Integrated Approach for Pesticide Risk Reduction Farmer Ecosystem-Literacy Education: Farmers Field School Case Study: Philippines: Sustainable Intensification of Rice Production Concluding Notes & ...
-
Long-term fertilization influences on clay mineral composition and Ammonium adsorption in a Rice Paddy soil
Increasing NH4+ adsorption can be an effective alternative in building an available N pool in soils to optimize crop recovery and minimize losses into the environment. We hypothesized that long-term fertilization may change NH4+ adsorption due to changes in the chemical and mineralogical properties of a rice (Oryza sativa L.) paddy soil. The objectives of this study were (i) to determine clay ...
-
Procedure for rapid determination of δ15N and δ18O values of nitrate: development and application to an irrigated rice paddy watershed
The dual isotope approach using the stable isotope ratios of nitrate nitrogen (δ15NNO3) and oxygen (δ18ONO3) is a strong tool for identifying the history of nitrate in various environments. Basically, a rapid procedure for determining δ15NNO3 and δ18ONO3 values is required to analyze many more samples quickly and thus save on the operational costs of isotope-ratio mass spectrometry (IRMS). We ...
-
Basic Information of Rice Production Line
The objective of a rice milling system is to remove the husk and the bran layers from paddy rice to produce whole white rice kernels that are sufficiently milled, free of impurities and contain a minimum number of broken kernels. The milling yield and quality of rice is dependent on the quality of the paddy, the milling equipment used and the skill of the mill operator. With the rapid upgrading ...
-
Dissipation and residues of trifloxystrobin and its metabolite in rice under field conditions
Residue analysis of trifloxystrobin and its metabolite (CGA 321113) in rice matrices, paddy water, and soil was developed using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method and high performance liquid chromatography tandem mass spectrometry (HPLC‐MS/MS). The method was used to evaluate the dissipation rate of trifloxystrobin and CGA 321113 in rice seedling, soil, and ...
-
U.S. Rice and NAFTA
Implications The NAFTA agreement series begins our focus on commodities, with a look at rice. In 2016, one in every eight rows of rice planted in the United States made its way to our NAFTA partners. But recent moves by the governments of the United States, Mexico and Canada could lead to a change in the important Mexican and Canadian markets. The Growth Story Prior to the NAFTA agreement, ...
-
Rice Milling Machine-- paddy de-cleaner and paddy separator
Rice is one of the nomal grain in our daily. The increasing demannd for rice has greatly improved business that related to rice. Rice milling is a most important process for rice and paddy. With the highly development of economy, rice milling equipment has play a key role in rice business,especially for the commercial purpose. Hence the development ofrice mill machine is more effective, more ...
-
Simulating leaf appearance in rice
Most rice (Oryza sativa L.) simulation models assume that only temperature affects leaf appearance rate (LAR). This assumption ignores results from controlled environment studies that show that LAR in rice is not constant with time (calendar days) under constant temperature. The Streck model, which takes into account age effects on LAR, improved the prediction of leaf appearance in winter wheat ...
-
Save and Grow: Pesticide Risk Reduction for Sustainable Intensification of Rice Production
Outline Presentation Background: Agricultural Scenario (2010-2050) & Crop Intensification Risks =>indiscriminate use of agrochemicals in rice paddy systems Overview FAO Intervention: Integrated Approach for Pesticide Risk Reduction Farmer Ecosystem-Literacy Education: Farmers Field School Case Study: Philippines: Sustainable Intensification of Rice Production Concluding Notes & ...
-
Precautions before operating the paddy transplanter
A rice transplanter is a specialized transplanter widely used to plant rice seedlings in the paddy field. The machine can both improve the efficiency and quality of rice transplanting. However some questions are claimed by the clients when using the paddy transplanter and we found that most of the problems are caused by the unproper use of the rice planter machine. In the following, we will give ...
-
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 ...
-
Arsenite stress variably stimulates pro‐oxidant enzymes, anatomical deformities, photosynthetic pigment reduction and antioxidants in arsenic tolerant and sensitive rice seedlings
Contamination of arsenic (As) in rice (Oryza sativa L.) paddies and subsequent uptake by rice plants is a serious concern as rice is the staple crop for millions. Identification of As toxicity and detoxification mechanisms in paddy rice cultivars would help to reduce As‐associated risk. Arsenic tolerance and susceptibility mechanisms were investigated in two differential As accumulating rice ...
-
Assessment of climate change impacts on irrigation water requirement and rice yield for Ngamoeyeik Irrigation Project in Myanmar
This study analyzes the impacts of climate change on irrigation water requirement (IWR) and yield for rainfed rice and irrigated paddy, respectively, at Ngamoeyeik Irrigation Project in Myanmar. Climate projections from two General Circulation Models, namely ECHAM5 and HadCM3 were derived for the 2020s, 2050s, and 2080s. The climate variables were downscaled to basin level by using the ...
-
Accumulation of mercury and cadmium in rice from paddy soil near a mercury mine
Paddy soil and rice (Oryza sativa L.) in the Wanshan mining area in Guizhou province have been contaminated by toxic trace metals such as cadmium (Cd) and mercury (Hg). This study examined correlations between the types and physico‐chemical parameters of the soil and the contents of trace metals and the different forms of Hg in rice. The study also carried out an assessment of the health risks ...
-
Have humans tilted the climate books out of balance?
In the great book-keeping of climate change, scientists have just discovered a big mistake. They have been wrong, they now think, to count on the mountains, the plains, the forests and the grasslands as an agency that slows climate change by absorbing carbon dioxide. It does absorb carbon dioxide. But the chilling news is that the soil itself may be making the world warmer. That is because ...
-
Rice husk revolution
India produces 200 million tonnes of paddy. One tonne paddy gives 700 kg of rice and 300 kg of rice husk. Rice husk has heating value (calorific value) of 3000 kcal per kg. So it is excellent fuel. So we can burn rice husk and produce steam and generate power from it. For villages 10 KW power plant based on steam engine is quite appropriate which can process 4000 kg. of paddy into unpolished rice ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you