scholarly journals Moisture requirement and water productivity of selected rainfed rice varieties grown under controlled water environment in Ifakara, Tanzania

2019 ◽  
Vol 10 (1) ◽  
pp. 1-15
Author(s):  
M. J. F. Kitilu ◽  
A. M. S Nyomora ◽  
J. Charles
Keyword(s):  
Water Productivity ◽  
Water Environment ◽  
Rice Varieties ◽  
Rainfed Rice

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 Traits and QTLs for development of dry direct-seeded rainfed rice varieties

2014 ◽  
Vol 66 (1) ◽  
pp. 225-244 ◽  
Author(s):  
Nitika Sandhu ◽  
Rolando O. Torres ◽  
Ma. Teresa Sta Cruz ◽  
Paul Cornelio Maturan ◽  
Rajinder Jain ◽  
...  
Keyword(s):  
Rice Varieties ◽  
Rainfed Rice ◽  
Direct Seeded

scholarly journals Effect of Irrigation Practices on Water Use Its Efficiency and Economic Yield in Rice Varieties

2020 ◽  
pp. 67-71
Author(s):  
P. Kunjammal ◽  
Subbalakshmi Lokanadhan ◽  
S. Murali Krishnasamy ◽  
D. Jawahar ◽  
K. Ganesamurthy
Keyword(s):  
Water Use ◽  
Water Productivity ◽  
Rice Variety ◽  
Flood Irrigation ◽  
Rice Varieties ◽  
Wetting And Drying ◽  
Agricultural College ◽  
Irrigation Practice ◽  
Use Efficiency ◽  
Irrigation Practices

A field experiment was carried out at the Agricultural College & Research Institute, Coimbatore in research farm during samba season 2018-2019 to assess the water use  and its efficiency in different rice varieties comprising aromatic rice, land races, popular cultivars and recent released variety under modified irrigation practices. The experimental design was a split plot with three replications. The main plots with contionous flooding and modified irrigation practices and  sub plots with eight varieties as treatments viz., (S1) Kalanamak, (S2) Jeeragasamba, (S3) Kavuni, (S4) Mappilaisamba, (S5)Improved TNAU White ponni, (S6) Bhavani, (S7) CO 51 and (S8) CO 52. Irrigation practice of alternate wetting and drying, monitoring with field tube registered lower consumption of water (900 mm) with less number of irrigation(14), higher water use efficiency (7.3 kg ha-1mm-1) and water productivity (1682 lit.kg-1) in rice, compared to flood irrigation practices. In Sub plot with different rice varieties viz., aromatic, landraces, popular cultivar and recently released rice variety among these varieties the recent released variety CO52 recorded higher grain yield (6.6 t ha-1), compared to other varieties.

scholarly journals INCREASING WATER PRODUCTIVITY OF LOWLAND RICE THROUGH THE WATER SAVING TECHNIQUES AND CROP MANAGEMENT IN RESPONSE TO DROUGHT

Agromet ◽  
2009 ◽  
Vol 23 (2) ◽  
pp. 123
Author(s):  
Didiek Setiobudi ◽  
Hasil Sembiring
Keyword(s):  
Grain Yield ◽  
Irrigation Water ◽  
Yield Components ◽  
Water Productivity ◽  
Moisture Stress ◽  
Water Saving ◽  
Lowland Rice ◽  
Wet Season ◽  
Soil Moisture Stress ◽  
Rice Varieties

The water saving technology for lowland rice cultivation was very crucial because of in the future irrigation water become scarce and competed with other sectors. The lowering of the availability of irrigation water had the impact for sustainability of rice production. The review of the paper described the pattern of basic water requirement, yield responses of several lowland rice varieties to moisture stress, days interval irrigation and the alternatives of water saving techniques for improving yield and water productivity. The pattern of the actual water requirement (ET+P&S) showed the maximum value of 8.8 mm/day (1.02 lt/sec/ha) for high yielding varieties (HYV) that occurred from heading to 50% flowering. Under limited water supply, irrigation water should be applied that period to prevent yield loss. Soil moisture stress at moderate level (- 0.5 bar) from heading to full flowering was significantly decreased yield about 30% when compared with the yield of continuously flooded 3 cm depth. This period was a critical period of HYV to soil moisture stress. For rotational irrigation purposes, information of the optimum days interval irrigation was important. It was found that 3 days irrigation interval was a critical limit for HYV to achieve higher yield. The SRI model of rice cultivation had the lowest rice yield in the lowland soil, poor drainage, clay soil texture and low permeability. The modified irrigation of the SRI plus fertilizer N based on LCC readings gave a greater yield as well as water productivity. The hybrid and NPT line rice varieties had higher yield components and grain yield than Ciherang variety. Ciherang variety was not favor to grown for the wet season, it was more productive when grown in dry season even with AWD irrigation model. The plant spacing of 25 cm x 25 cm gave higher number of panicle/hill and number of spikelet/panicle under both AWD and continuously flooded 3 cm depth for dry and wet season consistently. The fertilizer N management based on SSNM with low and high rates for the early vegetative stage were not significantly affected all yield components and grain yield. The AWD irrigation could save irrigation water about 18% when compared to the continuously flooded conditions.The grain yield of the hybrid, inbred and NPT line rice varieties was higher for the dry season than wet season under both AWD irrigation and continuous flooding consistently.

scholarly journals Harvest Date Influence on Seed Germination of Some Nerica Rainfed Rice Varieties

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Melie Feyem MN ◽  
Bell JM ◽  
Malaa Kenyi D ◽  
Fankou Dougoua MY ◽  
Moche K ◽  
...  
Keyword(s):  
Seed Germination ◽  
Harvest Date ◽  
Rice Varieties ◽  
Rainfed Rice

scholarly journals Genetic diversity for drought and low-phosphorus tolerance in rice (Oryza sativa L.) varieties and donors adapted to rainfed drought-prone ecologies

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Somnath Roy ◽  
B. C. Verma ◽  
Amrita Banerjee ◽  
J. Kumar ◽  
Uday Sankar Ray ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Abiotic Factors ◽  
Rice Varieties ◽  
Rainfed Rice ◽  
Phosphate Availability ◽  
Low Phosphorus ◽  
Low Phosphorus Tolerance ◽  
Rainfed Upland ◽  
Rice Genotypes ◽  
Hydroponic Study

AbstractDrought and phosphate availability are two major abiotic factors limiting productivity of rice in rainfed upland areas. There has been a constant need for new improved donor with tolerance to multiple abiotic stress conditions for rainfed rice breeding. In the present study, a set of 32 popular rice varieties and landraces were evaluated for drought and low-phosphorus (P) tolerance, and also characterized using grain yield under reproductive drought QTLs (DTY QTLs) and Pup1 linked/specific molecular markers. Twenty-seven genotypes were identified as tolerant to moderately tolerant to drought. The SSR markers linked to ten DTY QTLs classified the genotypes into two groups corresponding to aus and indica. The tolerant genotypes were distributed under both groups. Based on the core markers of Pup1 locus, complete tolerant haplotype was recorded in nine genotypes other than the tolerant check Dular. Nine more genotypes showed the incomplete tolerant haplotypes. The rice genotypes showed significantly high genetic variability for low-P tolerance in hydroponic study. A few genotypes revealed non-Pup1 type tolerance which needs further confirmation.

scholarly journals PENGELOLAAN TANAMAN TERPADU PADI VARIETAS UNGGUL BARU DI LAHAN SAWAH TADAH HUJAN DI KABUPEN JAYAPURA, PAPUA

2019 ◽  
Vol 5 (1) ◽  
pp. 18
Author(s):  
Petrus A Beding ◽  
Batseba M. W. Tiro
Keyword(s):  
Growth And Yield ◽  
Rice Varieties ◽  
Integrated Crop Management ◽  
Rainfed Rice ◽  
Rainfed Lowland ◽  
Cultivation Technology ◽  
High Production ◽  
High Yielding Varieties ◽  
Main Components ◽  
The Village

The cultivation technology and the use of new superior varieties (VUB) is one of the main components in increasing rice productivity in rainfed land. The study aims to evaluate the performance of the rice VUB in rainfed lowland cultivated land with integrated crop management (PTT) approach. This activity was carried out in the village of Benyom Jaya 1, Nimbokrang District, Jayapura Regency, Papua Province, from April to September 2017 using a Randomized Group Design. each variety used is. VUB tested by Inpari, 7, Inpari 30, Inpari 32 and Inpari 33, were planted in a plot measuring 2 hectares of experimental area for each treatment was 20 x 20 m2. The parameters evaluated include plant height, number of tillers, yield components and pest and disease attacks. The results of the study showed that the Inpari 33 variety gave a significantly different growth and yield to the Inpari 30 and 7 varieties. The suitable and high yielding varieties at the study site were the high production varieties obtained from the Inpari 33 variety (5.9 t / ha) and the lowest variety is  Inpari  32 (4.47 t / ha) Keywords: Rice Varieties, Rainfed Rice Fields, Performance, PTT

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