scholarly journals Selection Effectiveness of Lodging Tolerance by using Pushing Resistance for Improving Rice Cultivar adapted to Direct Sowing Culture in Flooded Paddy Fields.

2000 ◽  
Vol 69 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Takefumi OGATA ◽  
Yuji MATSUE ◽  
Yuji HAMACHI
Keyword(s):  
Rice Cultivar ◽  
Paddy Fields ◽  
Direct Sowing

Rice (Oryza sativa L.) germplasm with better seedling emergence under direct sowing in flooded paddy field

2018 ◽  
Vol 16 (4) ◽  
pp. 352-358 ◽  
Author(s):  
Junichi Kashiwagi ◽  
Koji Hamada ◽  
Yutaka Jitsuyama
Keyword(s):  
Paddy Field ◽  
Oryza Sativa L ◽  
Seedling Emergence ◽  
Screening Method ◽  
Paddy Fields ◽  
Rice Germplasm ◽  
Geographical Regions ◽  
Wide Range ◽  
Cultivation Practice ◽  
Direct Sowing

AbstractDirect sowing of rice in a flooded paddy field is a beneficial cultivation practice for water use and labour efficiency, compared to the transplanted cultivation. However, a drastic reduction in seedling emergence under flooded paddy fields is a serious constraint especially when the seeds fell at deeper soil layers. Suitable rice germplasm for the direct sowing in flooded paddy fields could ensure the success of this cultivation practice. Instead of laborious field-based screening systems, a pot-based screening method was adopted for simplicity and efficient evaluation of seedling emergence of a subset of world rice germplasm (n = 75) at different sowing depths. As a result, two rice genotypes, ‘Vary Futsi’ (landrace from Madagascar, non-glutinous, subspecies Indica) and ‘Dahonggu’ (landrace from China, non-glutinous, subspecies Indica), with consistently better seedling emergence were identified from a wide range of rice germplasm. These genotypes could serve as excellent parents for the breeding program in developing new rice cultivars with the improved seedling emergence in flooded paddy fields. There were no significant differences in the seedling emergence rate in flooded paddy conditions among the groups from various agro-geographical regions.

A combination of rice cultivar mixed-cropping and duck co-culture suppressed weeds and pests in paddy fields

2019 ◽  
Vol 40 ◽  
pp. 67-77 ◽  
Author(s):  
Meijuan Li ◽  
Ronghua Li ◽  
Jiaen Zhang ◽  
Shiwei Liu ◽  
Zewen Hei ◽  
...  
Keyword(s):  
Rice Cultivar ◽  
Paddy Fields ◽  
Mixed Cropping

scholarly journals Response of Some Rice Cultivars in New Opening Paddy Fields with High Fe2+ Using Multi-packet Technology

2013 ◽  
Vol 17 (3) ◽  
pp. 239-244
Author(s):  
M Zulman Harja Utama ◽  
Ismed Wahidi ◽  
. Sunadi
Keyword(s):  
Rice Yield ◽  
Rice Cultivar ◽  
Paddy Fields ◽  
Growth And Yield ◽  
Rice Cultivars ◽  
Plant Spacing ◽  
Ferrous Ions ◽  
Randomized Design ◽  
West Sumatra ◽  
Completely Randomized Design

The main obstacle to increase rice yield in new opening paddy fields, is that high levels of dissolved ferrous ions(Fe2+) which toxic to plants. This research aimed to study the growth and yield of several rice cultivars tolerant toFe2+ in the new opening paddy fields with multi-packet technology. The experiment was conducted from April toDecember 2010, at the new opening pay fields in Koto Baru of Dharmasraya District, West Sumatra. Experimentsused a factorial in a Completely Randomized Design with three replications. The first factor was, selected ricevarieties which were: Krueng Aceh; IR 36; Tukad Balian; Ciherang; and Cisokan. The second factor was thedifferent plant spacing which were a 30 × 30 cm with two seeds per hole, and Plant spacing (10 × 10) × 30 × (10 × 10)cm with one seed per hole. The rice cultivation with packet technology can improved the growth and yield of paddyrice cultivated in new opening paddy field high in Fe2+. Technology package consisting a combination of ricevariety (Krueng Aceh, IR36, and Tukad Balian) + SRI system + peat amelioran 20 Mg ha-1 + plant spacing (10 × 10)× 30 × (10 × 10) cm with one seed per hole, had the best growth and yield of rice cultivated in the new opening fieldshigh in Fe2+, especially in Koto Baru of Dharmasraya District, Krueng Aceh was a variety with the highest grain production by 5.65 Mg ha-1.Keywords: Fe2+; new fields; rice cultivar; technology[How to Cite: Utama MZH, I Wahidi and Sunadi. 2012. Response of Some Rice Cultivars in New Opening Paddy Fields with High Fe2+ Using Multi-packet Technology. J Trop Soils, 17 (3) : 234-244. doi: 10.5400/jts.2012.17.3.239][Permalink/DOI: www.dx.doi.org/10.5400/jts.2012.17.3.239] 

scholarly journals A STUDY ON THE SAR DATA OBSERVATION TIME FOR THE CLASSIFICATION OF PLANTING CONDITION OF PADDY FIELDS

2016 ◽  
Vol XLI-B8 ◽  
pp. 927-930
Author(s):  
A. Kimura ◽  
A. Kondo ◽  
K. Mochizuki
Keyword(s):  
Paddy Field ◽  
Low Cost ◽  
Observation Time ◽  
Paddy Fields ◽  
Synthetic Aperture ◽  
Initial Growth ◽  
Acquisition Costs ◽  
Statistical Distance ◽  
Direct Sowing

In recent years, cultivation methods of rice have been diversified due to the low cost of rice-growing techniques. For example, there is direct sowing of seed rice in paddy field in addition to the practice of usual paddy field to flooding at the time of planting. The yield of the usual paddy field and the direct sowing is different even though the same varieties are grown in the same area. It is necessary to grasp by performing classification for the usual paddy field or direct sowing for the management of agricultural crops. The main objective of this study was to select the observation time for the classification of paddy fields’ planting conditions by utilizing Synthetic Aperture Radar TerraSAR-X satellite. The planting conditions included the usual planting of rice, the direct sowing of rice and the soybean. We selected the observation time by the statistical distance of the microwave backscattering in each paddy field for maximizing the planting condition classification. In addition, the satellite data observation timing considered the processing time of the analysis and the acquisition costs. The acquisition was performed 4 periods from 2 periods in the rice growing season and the planting phase. In the current study, we were able to classify the usual planting of rice, the direct sowing of rice and the soybean by TerraSAR-X data for the later planting of rice during mid-May and initial growth of rice in early June.

scholarly journals Studies on the Mechanized Work System of the Through Process in Rice Culture Practice by the Use of Large Machines in Direct-sowing on the Dry Paddy Fields

1971 ◽  
Vol 1971 (11) ◽  
pp. 40-45
Author(s):  
Yoshiki HASHIMOTO ◽  
Matazo IZUMIDA ◽  
Yuichi OTSUKI ◽  
Hiroshi KANAYAMA
Keyword(s):  
Paddy Fields ◽  
Rice Culture ◽  
Work System ◽  
Direct Sowing

scholarly journals Methane Cycling in Paddy Field: A Global Warming Issue

2020 ◽  
Author(s):  
Mohammed Mahabubur Rahman ◽  
Akinori Yamamoto
Keyword(s):  
Global Warming ◽  
Paddy Field ◽  
Rice Paddy ◽  
Rice Cultivar ◽  
Paddy Fields ◽  
Ch4 Emission ◽  
Ch4 Production ◽  
Global Warning ◽  
Controlled Irrigation ◽  
Emission Effect

Paddy fields are major sources of CH4 emission and a vital source of global warming. Thus, it is important to understand the CH4 cycling in paddy field. The CH4 chemistry, mechanisms of production and emission from paddy fields are also significantly important to understand. This paper discusses about the CH4 cycling, how CH4 emission effect on the global warming, and the mechanisms of CH4 exchange between rice paddy field and atmosphere, factors effecting the CH4 production, oxidation, transportation and calculation. Also try to suggest the CH4 mitigation options of paddy fields. The mitigation of CH4 emission can be achieved by water management, selection of rice cultivar and fertilization. Controlled irrigation can also reduce CH4 production compared to flood irrigation. Cultivation of high-yielding and more heat-tolerant rice cultivars will be promising approach to reduce CH4 emissions and slow down the global warning.

scholarly journals A STUDY ON THE SAR DATA OBSERVATION TIME FOR THE CLASSIFICATION OF PLANTING CONDITION OF PADDY FIELDS

2016 ◽  
Vol XLI-B8 ◽  
pp. 927-930
Author(s):  
A. Kimura ◽  
A. Kondo ◽  
K. Mochizuki
Keyword(s):  
Paddy Field ◽  
Low Cost ◽  
Observation Time ◽  
Paddy Fields ◽  
Synthetic Aperture ◽  
Initial Growth ◽  
Acquisition Costs ◽  
Statistical Distance ◽  
Direct Sowing

In recent years, cultivation methods of rice have been diversified due to the low cost of rice-growing techniques. For example, there is direct sowing of seed rice in paddy field in addition to the practice of usual paddy field to flooding at the time of planting. The yield of the usual paddy field and the direct sowing is different even though the same varieties are grown in the same area. It is necessary to grasp by performing classification for the usual paddy field or direct sowing for the management of agricultural crops. The main objective of this study was to select the observation time for the classification of paddy fields’ planting conditions by utilizing Synthetic Aperture Radar TerraSAR-X satellite. The planting conditions included the usual planting of rice, the direct sowing of rice and the soybean. We selected the observation time by the statistical distance of the microwave backscattering in each paddy field for maximizing the planting condition classification. In addition, the satellite data observation timing considered the processing time of the analysis and the acquisition costs. The acquisition was performed 4 periods from 2 periods in the rice growing season and the planting phase. In the current study, we were able to classify the usual planting of rice, the direct sowing of rice and the soybean by TerraSAR-X data for the later planting of rice during mid-May and initial growth of rice in early June.

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