scholarly journals Subsurface Drainage to Enable the Cultivation of Winter Crops in Consolidated Paddy Fields in Northern Iran

2016 ◽  
Vol 8 (3) ◽  
pp. 249 ◽  
Author(s):  
Mehdi Jafari-Talukolaee ◽  
Henk Ritzema ◽  
Abdullah Darzi-Naftchali ◽  
Ali Shahnazari
Keyword(s):  
Subsurface Drainage ◽  
Paddy Fields ◽  
Northern Iran ◽  
Winter Crops

scholarly journals Integrating Irrigation and Drainage Management to Sustain Agriculture in Northern Iran

2018 ◽  
Vol 10 (6) ◽  
pp. 1775 ◽  
Author(s):  
Abdullah Darzi-Naftchali ◽  
Henk Ritzema
Keyword(s):  
Agricultural Production ◽  
Water Productivity ◽  
Subsurface Drainage ◽  
Paddy Fields ◽  
Steady Increase ◽  
Nutrient Loads ◽  
Long Term Effects ◽  
Northern Iran ◽  
Yield Data ◽  
Drainage Systems

In Iran, as in the rest of the world, land and water for agricultural production is under pressure. Integrating irrigation and drainage management may help sustain intensified agriculture in irrigated paddy fields. This study was aimed to investigate the long-term effects of such management strategies in a newly subsurface drained paddy field in a pilot area in Mazandaran Province, northern Iran. Three strategies for managing subsurface drainage systems were tested, i.e., free drainage (FD), midseason drainage (MSD), and alternate wetting and drying (AWD). The pilot area consisted of subsurface drainage systems, with different combinations of drain depth (0.65 and 0.90 m) and spacing (15 and 30 m). The traditional surface drainage of the region’s consolidated paddy fields was the control. From 2011 to 2017, water table depth, subsurface drainage system outflow and nitrate, total phosphorous, and salinity levels of the drainage effluent were monitored during four rice- and five canola-growing seasons. Yield data was also collected. MSD and AWD resulted in significantly lower drainage rates, salt loads, and N losses compared to FD, with MSD having the lowest rates. Phosphorus losses were low for all three practices. However, AWD resulted in 36% higher rice yields than MSD. Subsurface drainage resulted in a steady increase in canola yield, from 0.89 ton ha−1 in 2011–2012 to 2.94 ton ha−1 in 2016–2017. Overall, it can be concluded that managed subsurface drainage can increase both water productivity and crop yield in poorly drained paddy fields, and at the same time reduce or minimize negative environmental effects, especially the reduction of salt and nutrient loads in the drainage effluent. Based on the results, shallow subsurface drainage combined with appropriate irrigation and drainage management can enable sustained agricultural production in northern Iran’s paddy fields.

scholarly journals Performances of Sheet-Pipe Typed Subsurface Drainage on Land and Water Productivity of Paddy Fields in Indonesia

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 48
Author(s):  
Chusnul Arif ◽  
Budi Indra Setiawan ◽  
Satyanto Krido Saptomo ◽  
Hiroshi Matsuda ◽  
Koremasa Tamura ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Productivity ◽  
Type System ◽  
Soil Surface ◽  
Subsurface Drainage ◽  
Crop Productivity ◽  
Paddy Fields ◽  
Soil Conditions ◽  
Rice Varieties ◽  
Soil Aeration

Subsurface drainage technology may offer a useful option in improving crop productivity by preventing water-logging in poor drainage paddy fields. The present study compared two paddy fields with and without sheet-pipe type subsurface drainage on land and water productivities in Indonesia. Sheet-pipe typed is perforated plastic sheets with a hole diameter of 2 mm and made from high-density polyethylene. It is commonly installed 30–50 cm below the soil surface and placed horizontally by a machine called a mole drainer, and then the sheets will automatically be a capillary pipe. Two fields were prepared, i.e., the sheet-pipe typed field (SP field) and the non-sheet-pipe typed field (NSP field) with three rice varieties (Situ Bagendit, Inpari 6 Jete, and Inpari 43 Agritan). In both fields, weather parameters and water depth were measured by the automatic weather stations, soil moisture sensors and water level sensors. During one season, the SP field drained approximately 45% more water compared to the NSP field. Thus, it caused increasing in soil aeration and producing a more significant grain yield, particularly for Inpari 43 Agritan. The SP field produced a 5.77 ton/ha grain yield, while the NSP field was 5.09 ton/ha. By producing more grain yield, the SP field was more effective in water use as represented by higher water productivity by 20%. The results indicated that the sheet-pipe type system developed better soil aeration that provides better soil conditions for rice.

scholarly journals Diazinon Residues in Rice and Associated Health Risks for Human; A Case Study in Rasht, Iran

2021 ◽  
Vol 9 (2) ◽  
pp. 169-176
Author(s):  
Fatemeh Ghanbari ◽  
◽  
Maryam Kiani Sadr ◽  
Masoud Kouckakian ◽  
Kobra Melhosseini Darani ◽  
...  
Keyword(s):  
Health Risk ◽  
Health Risks ◽  
Organophosphorus Pesticides ◽  
Risk Index ◽  
Paddy Fields ◽  
Agricultural Crop ◽  
Northern Iran ◽  
Health Risk Index ◽  
Potential Health ◽  
Rice Consumption

Background: Rice is the most important agricultural crop and the main food in Gilan and Mazandaran Provinces in northern Iran where organophosphorus pesticides, especially diazinon, are used. The excessive use of this insecticide in the paddy fields of Rasht County is a serious threat to people’s health. Methods: In this study, 30 rice samples were collected from five zones in the paddy fields of Rasht in summer. The samples were analyzed when rice is sold to assess the health risk caused by diazinon residues in rice. Following the digestion process, the samples were injected into a High-Performance Liquid Chromatography (HPLC) instrument. Analysis of Variance (ANOVA) and one-sample t-test were respectively used for analyzing data and the Health Risk Index (HRI) for assessing the risk of rice consumption. Results: According to the results, the mean residual diazinon concentration in the rice crops of the five studied zones at the time of consumption (three months after harvest) was 0.4±0.43 mg/kg-1. This was higher than the Iranian standard for permissible diazinon concentration in rice. The results of the health risk assessment for rice consumption indicated an HRI value of 0.13 for rice consumption, which did not constitute a serious risk for people who consume rice regularly. Conclusion: Although the results of this study showed that there are no potential health risks for consumers, with increasing the use of chemical pesticides for crops, to achieve food safety, regular monitoring of pesticide residues in crops is recommended

RETRACTED: Double cropping in paddy fields of northern Iran: Current trends and determinants of adoption

2017 ◽  
Vol 62 ◽  
pp. 59-67 ◽  
Author(s):  
V. Toorminaee ◽  
M.S. Allahyari ◽  
C.A. Damalas ◽  
H. Aminpanah
Keyword(s):  
Paddy Fields ◽  
Northern Iran ◽  
Current Trends ◽  
Double Cropping

scholarly journals Chemical Weed Control in Paddy Fields Inoculated with Azospirillum lipoferum

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
A. SEDDIGUI KIASARI ◽  
H. AMINPANAH ◽  
P. SHARIFI
Keyword(s):  
Grain Yield ◽  
Weed Control ◽  
Weed Management ◽  
Paddy Fields ◽  
Azospirillum Lipoferum ◽  
Northern Iran ◽  
Growing Period ◽  
Management Regime ◽  
Significant Difference ◽  
Hand Weeding

ABSTRACT: Herbicides, as a major part of weed control strategy in paddy fields, have different impact on growth and activity of soil-beneficial bacteria such as Azospirillum species. A field experiment was conducted at Sefid Rood Livestock and Agricultural Company, northern Iran, to investigate the possibility of chemical weed control in paddy fields inoculated with Azospirillum lipoferum. The experiment was designed in a factorial arrangement based on a randomized complete block with three replicates. The factors were Azospirillum application (inoculation with or without Azospirillum lipoferum) and weed management regime (butachlor application with supplementary hand-weeding, bensulfuron methyl application with supplementary hand-weeding, combination of butachlor and bensulfuron methyl application with supplementary hand-weeding, hand-weeding at 15, 30, and 45 days after transplanting, and no weeding [not weeded during the rice-growing period). The results showed that plants inoculated with A. lipoferum produced 19% higher grain yield compared to plants that were not inoculated. The highest grain yields were recorded for plots treated with butachlor with supplementary hand-weeding (4,512 kg ha-1) and for those treated with a combination of butachlor and bensulfuron methyl with supplementary hand-weeding (4500.5 kg ha-1). The lowest yield (3494.3 kg ha-1) was recorded for weedy plots. No significant interaction was detected between A. lipoferum application and weed management regime for grain yield, indicating that the herbicides had no adverse effect on the efficiency of A. lipoferum in promoting growth and grain yield of rice. There was no significant difference in the dry weights of weed between inoculated and non-inoculated plots. The dry weights of weed in hand-weeded and herbicide-treated plots were significantly lower than that of the weedy plot. In conclusion, the result of this experiment confirms the possibility of chemical weed control in paddy fields inoculated with A. lipoferum.

Predicting adoption of double cropping in paddy fields of northern Iran: a comparison of statistical methods

2017 ◽  
Vol 15 (4) ◽  
pp. 907-917 ◽  
Author(s):  
Solmaz Nadaf Fahmideh ◽  
Mohammad Sadegh Allahyari ◽  
Christos A. Damalas ◽  
Zahara Daghighi Masouleh ◽  
Mona Ghazi
Keyword(s):  
Statistical Methods ◽  
Paddy Fields ◽  
Northern Iran ◽  
Double Cropping
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