Yield, water productivity and nutrient balances under the System of Rice Intensification and Recommended Management Practices in the Sahel

2012 ◽  
Vol 130 ◽  
pp. 155-167 ◽  
Author(s):  
Timothy J. Krupnik ◽  
Carol Shennan ◽  
Jonne Rodenburg
Keyword(s):  
Management Practices ◽  
Water Productivity ◽  
System Of Rice Intensification ◽  
Nutrient Balances ◽  
Rice Intensification ◽  
Recommended Management Practices

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.

Influence of system of cultivation and genotypes of preceding rice-ratoon on growth and yield of green gram (Vigna radiata L.) sown at varying dates in coastal alluvium soil of eastern India

2017 ◽  
Author(s):  
Sanat Kumar Dwibedi ◽  
Gopal Chandra De ◽  
Sudhi Ranjan Dhua ◽  
Ashok Kumar Mohanty
Keyword(s):  
Seed Yield ◽  
Best Management Practices ◽  
Management Practices ◽  
Soil Nutrient ◽  
Green Gram ◽  
Growth And Yield ◽  
System Of Rice Intensification ◽  
Residual Soil ◽  
Eastern India ◽  
Rice Intensification

Field experiment was conducted in coastal alluvium soil of eastern India during late rabi of 2009-10 and 2010-11 in split split-plot design with three dates of sowing for rice-ratoon i.e. 20 June, 5 and 20 July followed by green gram cv. PDM-139 (Samrat) i.e. 2 January, 17 January and 1 February in main plots, three systems of cultivation of the preceding rice-ratoon i.e. ratoons of rice under best management practices (BMP), system of rice intensification (SRI) and modified SRI (MSRI) in sub plots and two genotypes of rice-ratoon i.e. HR Ajay and HYV Tapaswini in sub sub-plots. Green gram was grown under residual soil nutrient and the crop sown on 2 January recorded the highest seed yield of 0.703 t ha-1 (REY of 2.933 t ha-1) and this was followed by sowing on 17 January and 1 February. The seed yield of green gram followed diminishing trend under SRI-ratoon, MSRI-ratoon and BMP-ratoon, respectively.

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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