scholarly journals Impact of Water Management on Rice Varieties, Yield, and Water Productivity under the System of Rice Intensification in Southern Taiwan

Water ◽  
2016 ◽  
Vol 9 (1) ◽  
pp. 3 ◽  
Author(s):  
Victoriano Pascual ◽  
Yu-Min Wang
Keyword(s):  
Water Management ◽  
Water Productivity ◽  
System Of Rice Intensification ◽  
Rice Varieties ◽  
Rice Intensification ◽  
Southern Taiwan

scholarly journals A Model of Evapotranspirative Irrigation to Manage the Various Water Levels in the System of Rice Intensification (SRI) and Its Effect on Crop and Water Productivities

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 170
Author(s):  
Chusnul Arif ◽  
Satyanto Krido Saptomo ◽  
Budi Indra Setiawan ◽  
Muh Taufik ◽  
Willy Bayuardi Suwarno ◽  
...  
Keyword(s):  
Water Use ◽  
Water Productivity ◽  
Drainage System ◽  
Efficiency Index ◽  
Water Levels ◽  
System Of Rice Intensification ◽  
Irrigation Regimes ◽  
Evapotranspiration Rate ◽  
Rice Intensification ◽  
Use Efficiency

Evapotranspirative irrigation is a simple idea in a watering field based on the actual evapotranspiration rate, by operating an automatic floating valve in the inlet without electric power to manage water levels. The current study introduces a model of evapotranspirative irrigation and its application under different water levels. The objectives were (1) to evaluate the performances of evapotranspirative irrigation under various irrigation regimes, and to (2) to observe crop and water productivities of the system of rice intensification (SRI) as affected by different types of irrigation. The experiment was performed during one rice planting season, starting from July to November 2020, with three irrigation regimes, i.e., continuous flooded (CFI), moderate flooded (MFI) and water-saving irrigation (WSI). Good performance of the system was achieved; low root mean square error (RMSE) was indicated between observed water level and the set point in all irrigation regimes. Developing a better drainage system can improve the system. Among the regimes, the WSI regime was most effective in water use. It was able to increase water productivity by up to 14.5% while maintaining the crop yield. In addition, it has the highest water-use efficiency index. The index was 34% and 52% higher than those of the MFI and CFI regimes, respectively. Accordingly, the evapotranspirative irrigation was effective in controlling various water levels, and we recommend the system implemented at the field levels.

scholarly journals IDENTIFIKASI SISTEM TANAM DAN VARIETAS PADI YANG DIKEMBANGKAN PETANI DI KABUPATEN PEMALANG

2020 ◽  
Vol 18 (1) ◽  
pp. 13-23
Author(s):  
Alfina Handayani
Keyword(s):  
Disease Resistance ◽  
Total Sample ◽  
Structured Interview ◽  
System Of Rice Intensification ◽  
Rice Varieties ◽  
High Productivity ◽  
Rice Intensification ◽  
The Government ◽  
Food Needs ◽  
Planting System

Increasing rice productivity has been the main priority for the Government of Indonesia to meet people's food needs, however, there are a number of obstacles such as technology adoption. This study aims to explore the condition of farmers' cultivation, especially in terms of planting systems, varieties developed and reasons for selecting varieties in three different land topographic types (low, medium, and high). Sampling was done purposely with a total sample of 45 farmers who cultivate rice. Data collection includes observation and structured interview, data were analyzed descriptively. The results showed that most of the planting system that developed in three types of topography is the ‘tegel’ planting system, other technologies such as “jajar legowo” and system of rice intensification (SRI) have low developed. This is influenced by the new planting system need more skilled labor, more expensive input, and lack of farmers' knowledge. Local rice varieties have declined significantly, dominated by certain superior varieties. The main reason for selecting varieties is due to high productivity and disease resistance. In addition, the accessibility of rice seeds by farmers at the nearest farm shop. This research suggested more intensive mentoring efforts should be done through farmers’ group meetings and improvement of supporting facilities, furthermore the Local Government should improve farmers' affordability of quality seeds.

PERFORMANCE OF UMAR-SRIMAT ON SOIL WATER CONSERVATION AND WEED CONTROL IN SYSTEM OF RICE INTENSIFICATION

2015 ◽  
Vol 76 (15) ◽  
Author(s):  
Umar Mohammed ◽  
Aimrun Wayayok ◽  
Mohd Amin Mohd Soom ◽  
Khalina Abdan
Keyword(s):  
Soil Moisture ◽  
Weed Control ◽  
Water Conservation ◽  
Crop Yields ◽  
Block Design ◽  
Water Productivity ◽  
Control Treatment ◽  
System Of Rice Intensification ◽  
Planting Geometry ◽  
Rice Intensification

Weed emergence is among the most important problems in system of rice intensification (SRI) due to extensive planting geometry of at least 25 × 25 cm and moist environment, thereby leading to water loss by means of evaporation from the broad space as a result of the extensive planting geometry, and transpiration by the weeds. This reduces the additional water saving which affect the potential of SRI water productivity.  It also reduces rice crop yields up to 70% if there is no weed control attempted. Nowadays, weed is being controlled by manual weeder which is labour demanding, while motorized weeders overcome the problem but still, it able to remove the weeds before rice canopy closure or 30 days after transplanting (DAT). This research was designed to evaluate the performance of UMAR-SRImat on soil moisture conservation and weed control. UMAR-SRImat was made using flaked rice straw and biodegradable adhesive. The design was laid out using randomized complete block design (RCBD) with three treatments [without soil cover (T1), SRImat (T2), UMAR-SRImat (T3)] and three replications. The analysis was conducted using analysis of variance (ANOVA). Volumetric moisture content (VMC) was determined at 18 and 25 DAT.  Weeds were observed and recorded to determine the weed dry weight and weed control efficiency at 20, 40 and 60 DAT. Plant height per hill was measured at 30 and 50 DAT, likewise, the number of tillers were counted at 30 and 50 DAT. The result of VMC showed that UMAR-SRImat significantly conserved water higher than the control treatment at 18 and 25 DAT of 3100.0a and 2680.0a m3/ha, respectively. The effectiveness of UMAR-SRImat mulched was 100% at 20 DAT 99.64% at 40 DAT and 97.99% at 60 DAT. This research revealed that UMAR-SRImat mulch could retain soil moisture and suppressed weeds up to 60 DAT.

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