scholarly journals Study on the influence of rice paddies’ water layer temperature on rice yield

2021 ◽  
Vol 939 (1) ◽  
pp. 012089
Author(s):  
A Rau ◽  
I Begmatov ◽  
G Rau
Keyword(s):  
Climate Change ◽  
Surface Layer ◽  
Rice Field ◽  
Rice Yield ◽  
Water Layer ◽  
Meteorological Conditions ◽  
Rice Crop ◽  
Rice Paddies ◽  
Rice Plants ◽  
Irrigation Period

Abstract Studies on Akdala rice system found that rice plants sensitive to meteorological conditions. Climate change leads to changes in crop structure. The temperature of the rice field air and water has a special influence on the structure of the rice crop. It is established that the temperature of the water layer in rice paddies in the irrigation period does not exceeds 290 C, which is below the threshold of 350 C, when the flow and discharge of water from the paddies are recommended. The temperature of water in rice paddies, the surface layer was determined by an express thermometer, at the depth of the water layer 5, 10, 15 and 20 cm by Savin Thermometers, soil – thermometers TM-5.

scholarly journals APPLICATION OF TRAP BARRIER SYSTEM COMBINED WITH CAGE TRAP FOR CONTROLLING RATS IN RICE FIELD

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Hastin Wulan Sekarweni ◽  
Yulia Pujiastuti ◽  
Siti Herlinda
Keyword(s):  
Rice Plant ◽  
Rice Field ◽  
Rice Yield ◽  
Research Area ◽  
Yield Reduction ◽  
Rice Varieties ◽  
Rice Plants ◽  
Number Of Males

Rice-field rat is a main pest of rice. Yield reduction caused by rat is quite high, because rats attack rice plant at all stages. One of the efforts applied to control rats is by using Trap Barrier System combined with cage trap. The objective of this research was to identify species of rat attacking rice plants and investigate the presence of  rat by their footprints. The experiment was conducted in Jalur 6  Village Sumber Mulya, Sub-district  Muara Telang,  District Banyuasin, South  Sumatra. One hectare of farmer’s rice field, divided into 3 sub-plot. Each sub-plot was planted with variety paddy of Inpari 22 (sub-plot A), Inpari 33 (sub-plot B), and Inpari 43 (sub-plot C). The number of cage traps was 6 traps per sub-plot. Observations were made 7 times, with an interval of 10 days. Results showed species of trapped rats in the research area was Rattus argentiventer, in which number of males was higher than females. Morphologically, the size of males were bigger than female. Number of footprints did not reperesentative the number of trapped rats. Inpari 43 variety was more preferred by rats because damage intensity was the highest than other two rice varieties.

scholarly journals Preliminary Prediction of Rice Planting for Planting Season 2019, 2020, and 2021, Based Water Balance in Freshwater Swampland

2020 ◽  
Vol 20 ◽  
pp. 01004
Author(s):  
Vika Mayasari ◽  
Anna Hairani
Keyword(s):  
Climate Change ◽  
Water Balance ◽  
Rice Field ◽  
Rainfall Data ◽  
Rice Crop ◽  
Crop Failure ◽  
Science Park ◽  
Yield Rate ◽  
The Difference ◽  
Planting Season

Climate change that has occurred in recent years causes a shift at the beginning of rice planting. Rice crop failure due to flooding or drought is the main cause of the low Cropping Index in the freshwater swampland such as happened in Swampland Agro Science Park of Banjarbaru. Therefore, this study was carried out to determine the preliminary prediction of the rice planting season for planting season (MT) 2019, 2020, and 2021 based on water balance. As for what can be analyzed was the rainfall data as input compared to evapotranspiration through the Hargreaves approach. Then the output obtained in the form of net rate which used to measure the amount of rain every year. M eanwhile, the water requirement for rice was calculated during the period of growth to harvest. After that, the water balance simulation was performed from the difference in water bubbles (net yield rate) with the water needs in the rice field. Based on this water balance simulation obtained that the beginning of rice planting for MT 2019 is May IV-June IV, MT 2020 is June I-July I, and MT 2021 is June II-July II.

scholarly journals Combate de sontol (Cyperus iria L.) en arroz.

2016 ◽  
Vol 6 ◽  
pp. 124
Author(s):  
Franklin Herrera ◽  
Renán Agüero A.
Keyword(s):  
Costa Rica ◽  
Rice Yield ◽  
Rice Cultivar ◽  
Rice Crop ◽  
Sulfonylurea Herbicides ◽  
Rice Plants ◽  
Control Effectiveness ◽  
Negative Effect

This experiment was conducted in a highly C. iria infested plot at "El Pelon" rice farm in Liberia, Costa Rica, to determine the control effectiveness of this weed by several hormonal and sulfonylurea herbicides and their selectivity to the rice crop, and to preliminarily estimate the negative effect of C. iria on the crop. The evaluated treatments included three new sulfonylureas, six herbicides recommended for cyperaceous and dicotyledonous control and an unweeded control. The herbicides were app!ied following each of the manufacturer's recommendations. The rice cultivar used was CR 1821 and the ground was kept saturated during the whole trial. The sulfonylurea herbicides, bensulfuron-ethyl and pyrazosulfuron-methyl, were the most effective in controlling C. iria, and they also were the highest yielding treatments. The herbicides commonly used for the cyperaceous control, showed intermediate control percentages of these weeds. When C. iria was not controlled, at approximately 30 days after planting, it completely covered the rice plants, completed its !ife cycle at 70 days and reduced the rice yield by 50%.

scholarly journals Revisiting Underlying Ecological Principles of Rice-Fish Integrated Farming for Environmental, Economical and Social benefits

Our Nature ◽  
1970 ◽  
Vol 3 (1) ◽  
pp. 1-12 ◽  
Author(s):  
T.B. Gurung ◽  
S.K. Wagle
Keyword(s):  
Rice Field ◽  
Field Experiments ◽  
Rice Yield ◽  
Fish Farming ◽  
Nutrient Regeneration ◽  
Top Down ◽  
Rice Plants ◽  
Integrated Farming ◽  
Ecological Principle ◽  
Rice Fish

Our goal is to revisit underlying ecological principle of rice-fish farming integration and synthesize information to suggest some pertinent patterns and connections that contribute to understanding of the interactions of abiotic and biotic factors in rice field for productivity enhancement. We synthesized ecological interactions, energy and material flow in absence and presence of bottom feeding omnivore fish to give a clear scenario of food web interactions in rice field. Rice plants, weeds and minute algae can be competitive to each other as they depend on common resources for growth. However, introduction of the fish about two weeks after rice plantation can add new link to the food chain by perturbation and top down control on rice competitors, pests and mobility of nutrients towards rice plant for increased rice field productivity to benefit the farmers economically, environmentally and socially. In relation to above synthesis, rice-fish integrated field experiments were performed in 4 mid hill districts of Nepal from 2000-2002. The results showed that despite of 3-5% loss of the rice cultivating area due to "trench" as fish hiding place, rice yield increased up to 9% in addition of 529 kg ha-1 fish from rice-fish integrated farming than cultivating rice alone. In rice-fish system, competitive advantages of rice plants over weeds and micro algae, control on rice pest and increased nutrient supply due to top down, perturbation and nutrient regeneration by fish were the reasons of increased rice yield in treatments than in controls where rice alone was cultivated. Key Words: Ecological principle, Rice-Fish integrated farming, Social benefitdoi:10.3126/on.v3i1.328Our Nature (2005) 3:1-12

Impact of Future Climate Change on Growth and Productivity of Rice Crop in Tamil Nadu

2007 ◽  
Vol 1 (3) ◽  
pp. 119-124 ◽  
Author(s):  
O. Srivani ◽  
V. Geethalaks ◽  
R. Jagannatha ◽  
K. Bhuvaneswa ◽  
L. Guruswamy
Keyword(s):  
Climate Change ◽  
Tamil Nadu ◽  
Future Climate ◽  
Rice Crop ◽  
Future Climate Change

scholarly journals Impact of a conservation agriculture system on soil characteristics, rice yield, and root-parasitic nematodes in a Cambodian lowland rice field

2019 ◽  
Vol 51 ◽  
pp. 1-15
Author(s):  
Malyna Suong ◽  
Elodie Chapuis ◽  
Vira Leng ◽  
Florent Tivet ◽  
Dirk De Waele ◽  
...  
Keyword(s):  
Rice Field ◽  
Rice Yield ◽  
Conservation Agriculture ◽  
Soil Characteristics ◽  
Lowland Rice ◽  
Parasitic Nematodes

scholarly journals GEOLOGICAL STRUCTURE OF SOILS AND RICE YIELD IN THE ILI RIVER BASIN

2020 ◽  
Vol 5 (443) ◽  
pp. 165-171
Author(s):  
Rau Alexey, ◽  
◽  
Kadasheva Zhanar, ◽  
Rau Genadiy, ◽  
Anuarbekov Kanat, ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Ground Water ◽  
Geological Structure ◽  
Rice Paddies ◽  
Irrigation Systems ◽  
Aeration Zone ◽  
Irrigation Period ◽  
River Terraces ◽  
Rice Irrigation ◽  
Lithological Composition

Rice irrigation systems in Kazakhstan are located on river terraces and levees of the Syr Darya, Ile, and Karatal rivers’ basins. The geological structure and lithological composition of soils in the aeration zone is characterized by a wide variety, differing in soil fertility, mechanical composition, water and physical properties, water availability and salinity. Alluvial-meadow and takyr soils consist of light and heavy loam, sandy loam, and clay [1,2,3]. Melioration errors of the rice irrigation systems, built in the period from 60s to 80s of the last century, can be described by the fact that the Kubanskaya rice sowing map was built on all soils of river terraces and river banks, with the same parameters of irrigation and drainage, with the share of rice 57.5% and 63% [4]. At the rice irrigation systems, where the geological structure and lithological composition of the aeration zone soils correspond to the irrigation and drainage parameters of the Kubanskaya rice sowing map, the soil fertility and ameliorative status of irrigated land has remained high for many decades. The salt content in the 100 cm soil layer is 0.3-0.4%; in the autumn-winter period ground water is at a depth of 2.0-2.5 m, its mineralization is 5-7 g/l. During the rice irrigation period, ground water does not connect with the water of rice paddies, and the filtration of water from rice paddies is permitted and comprises 12 – 17 mm/day. Rice is grown without flow and discharge of water from rice paddies, the irrigation rate is 21,400 m3/ha, and the yield is 5.2 t/ha. At the rice irrigation systems, where the geological structure and lithological composition of the soil in the aeration zone does not correspond to the irrigation and drainage parameters of the Kubanskaya rice sowing map, the land is saline. During the rice irrigation period, the ground water connects with the water on the rice paddies. On these paddies, due to the convective diffusion of salts from the soil and from ground water, water salinity increases and reaches the critical threshold of toxicity of 2.5 g/l [5]. It is necessary to discharge water to reduce the salinity of water on the rice paddies, which is followed by flooding of water from the irrigation channel. The irrigation rate is 23,500 m3/ha, and the yield is 4.7 t/ha.

scholarly journals Factor Influencing Adaptation Choices Employed by Farmers Against Climate Change to Improve Rice Yield in Bugarama Wetland in Rwanda

2020 ◽  
Vol 2 (1) ◽  
pp. 12-22
Author(s):  
Esther Nyirandorimana ◽  
Ezekiel Ndunda ◽  
John Muriuki
Keyword(s):  
Climate Change ◽  
Rice Yield ◽  
New Technology ◽  
Climatic Conditions ◽  
Descriptive Research ◽  
Changing Climate ◽  
Step Model ◽  
Rice Yields ◽  
Market Distance ◽  
Adaptation Method

The changing climate poses a great challenge to many wetlands productivity worldwide. Rice production in wetlands is a major source of livelihood in developing countries such as Rwanda. This study aimed at determining the factors influencing adaptation methods when farmers perceive the changing climate at Bugarama Wetland Rice Scheme in Rwanda. A descriptive research design was used by this study, whereby quantitative and qualitative data was collected. The analysis was based on data collected from 300 selected farmers using systematic random sampling method. We employed descriptive statistics to assess how farmers perceive the effects of climate change and descriptively measured the new adaptation methods used by farmers in Bugarama to increase their yields. The study adopted Heckman two-step model to determine factors that influence adaptation choices, this analysis procedurally required farmers’ knowledge of perception that makes them respond to the effects of changes in climatic conditions by the use of new adaptation methods. The results deduced that level of education (p =0.019), extension access (p=0.001), market distance (p=0.002) and rice income (p < 0.001) had a probability of influencing farmers perceptions about climate change thus need to adapt. Based on the outcome model, results showed that extension access (p < 0.001), household size (p= 0.098), market distance (p= 0.047), rice income (p =0.032), farmers-to-farmers contact (p < 0.001) and effects of climate change on rice (p=0.038) had a greater probability of influencing farmers choice of adaptation method used to improve rice yields. To conclude, the study found that access to informational facilities and rice income, influenced farmers’ perceptions while extension access, rice income, market distance, farmers-to-farmers contact and effects of climate change on rice yield strongly had a probability of determining farmers’ choice of adaptation. This study recommends that the Rwandan government and local administrators need to develop a strategy that would allow farmers to access information facilities about new technology so as to adapt to the effects of climate change thus improve their rice yields.

Sign in / Sign up

Export Citation Format

Share Document