Farmer's appropriation of system of rice intensification practices in water-scarce irrigation schemes in Northern Tanzania

2021 ◽  
Author(s):  
Rosemary Evarist Kavishe ◽  
Frederick Cassian Kahimba ◽  
Hans Charles Komakech
Keyword(s):  
System Of Rice Intensification ◽  
Northern Tanzania ◽  
Rice Intensification ◽  
Water Scarce

NGHIÊN CỨU ẢNH HƯỞNG CỦA PHÂN HỮU CƠ BOKASHI THAN ĐẾN SINH TRƯỞNG PHÁT TRIỂN VÀ NĂNG SUẤT GIỐNG LÚA H1 TRONG VỤ ĐÔNG XUÂN TẠI THỪA THIÊN HUẾ

2014 ◽  
Vol 91 (3) ◽  
Author(s):  
Trần Minh Quang
Keyword(s):  
System Of Rice Intensification ◽  
Rice Intensification

Mục đích chính của nghiên cứu này là xác định được lượng phân bón Bokashi than thích hợp nhất đối với giống lúa H1 theo phương thức thâm canh lúa cải tiến SRI (System of Rice Intensification) góp phần đưa ra quy trình thâm canh giống lúa H1 ở Thừa Thiên Huế. Kết quả nghiên cứu cho thấy trong điều kiện vụ Đông Xuân ở Thừa Thiên Huế giống lúa H1 sinh trưởng phát triển tốt, mang lại hiệu quả cao nhất khi sử dụng mức 5 tấn phân hữu cơ Bokashi than/ha. Khi bón ở mức này đã tăng khả năng cải thiện tính chất đất ở cả 3 mặt: lý tính, hóa tính và sinh tính.

INFLUENCE OF THE SYSTEM OF RICE INTENSIFICATION ON RICE YIELD AND NITROGEN AND WATER USE EFFICIENCY WITH DIFFERENT N APPLICATION RATES

2009 ◽  
Vol 45 (3) ◽  
pp. 275-286 ◽  
Author(s):  
LIMEI ZHAO ◽  
LIANGHUAN WU ◽  
YONGSHAN LI ◽  
XINGHUA LU ◽  
DEFENG ZHU ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
N Use Efficiency ◽  
System Of Rice Intensification ◽  
N Application ◽  
Application Rates ◽  
Rice Intensification ◽  
Use Efficiency ◽  
N Rates ◽  
N Use

SUMMARYField experiments were conducted in 2005 and 2006 to investigate the impacts of alternative rice cultivation systems on grain yield, water productivity, N uptake and N use efficiency (ANUE, agronomic N use efficiency; PFP, partial factor productivity of applied N). The trials compared the practices used with the system of rice intensification (SRI) and traditional flooding (TF). The effects of different N application rates (0, 80, 160 and 240 kg ha−1) and of N rates interacting with the cultivation system were also evaluated. Resulting grain yields with SRI ranged from 5.6 to 7.3 t ha−1, and from 4.1 to 6.4 t ha−1 under TF management. On average, grain yields under SRI were 21% higher in 2005 and 22% higher in 2006 than with TF. Compared with TF, SRI plots had higher harvest index across four fertilizer N rates in both years. However, there was no significance difference in above-ground biomass between two cultivation systems in either year. ANUE was increased significantly under SRI at 80 kg N ha−1 compared with TF, while at higher N application rates, ANUE with SRI was significantly lower than TF. Compared with TF, PFP under SRI was higher across all four N rates in both years, although the difference at 240 kg N ha−1 was not significant. As N rate increased, the ANUE and PFP under both SRI and TF significantly decreased. Reduction in irrigation water use with SRI was 40% in 2005 and 47% in 2006, and water use efficiency, both total and from irrigation, were significantly increased compared to TF. With both SRI and TF, the highest N application was associated with decreases in grain yield, N use efficiency and water use efficiency. This is an important finding given current debates whether N application rates in China are above the optimum, especially considering consequences for soil and water resources. Cultivation system, N rates and their interactions all produced significant differences in this study. Results confirmed that optimizing fertilizer N application rates under SRI is important to increase yield, N use efficiency and water use efficiency.

scholarly journals UJI BERBAGAI DOSIS PUPUK HERBAFARM GRANUL TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN PADI SAWAH (Oryza sativa L.) DENGAN METODE SRI

2019 ◽  
Vol 15 (2) ◽  
pp. 95-104
Author(s):  
AHMAD EFRIZAL ◽  
CHAIRIL EZWARD ◽  
SEPRIDO SEPRIDO
Keyword(s):  
Oryza Sativa ◽  
Standard Treatment ◽  
Oryza Sativa L ◽  
System Of Rice Intensification ◽  
Random Group ◽  
The Real ◽  
Rice Intensification ◽  
Plot Experiment

This report aims to understand response various herbafarm granule doses of growth and the production of rice (Oryza Sativa L.) fields with the SRI (System Of Rice Intensification). Draft use is a random (group shelves) non factorials namely fertilizer herbafarm granule consisting of 6 standard treatment consisting of 3 test, H0 (Without treatment), H1 (2,43 g/plot), H2 (4,86 g/plot), H3 (7,29 g/plot), H4 (9,72 g/plot), H5 (12,15 g/plot). Each treatment repeat three times, 18 units in order to obtain a plot / experiment, Every a plot there were 9 plants and 7 of them sample plants. The quantity of a crop a whole 162 plant. Then the data obtained by in statistically analysis, further by test different real bnj truthful , 5 percent the first. Based on the research done so it can be concluded that treatment fertilizer herbafarm granule with the SRI give impact on the real parameters, for observation age flowering ( 77.33 hst ) and aged harvest ( 109 .33 hst ) treatment is the best H1 treatment, As for the number of productive saplings (39.90 stem) and heavy of dried grain (87.48 gram) treatment is the best H4 treatment.

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 Comparative Analysis of Rice Performance and Profitability with the System of Rice Intensification (SRI) and Traditional Practices (TP) in Ziguinchor District, Senegal

2021 ◽  
Vol 2 (1) ◽  
pp. 22-36
Author(s):  
Pierre C. C. DIEDHIOU ◽  
Antoine SAMBOU ◽  
Ousmane NDIAYE, NGor NDOUR ◽  
Seydou K. DIEDHIOU
Keyword(s):  
Comparative Analysis ◽  
Rice Production ◽  
System Of Rice Intensification ◽  
Cost Ratio ◽  
Traditional Practices ◽  
Traditional System ◽  
Benefit Cost Ratio ◽  
Yield Parameters ◽  
Rice Intensification ◽  
Benefit Cost

The "System of Rice Intensification"(SRI) represents a sustainable alternative to improve household yields and incomes. This study aimed to evaluate the yields and the profitability of the SRI and the Traditional Practices (TP) in Ziguinchor district, Senegal. A directed sampling based on criteria for selecting the system used and the cultivated varieties common to both systems was applied to collect the yield parameters and yields of paddy rice. Thus, 18 producers in the Badiate, Essyl, and Fanda sites were selected, nine per system and four 1 m2 yield squares were installed in each selected producer plot. A total of 72 yield squares, 36 per system, were installed, and an individual questionnaire was randomly administered to 55 producers using at least one of the systems to collect data on rice production and costs. The yield parameters including the number of fertile tillers per m2, the number of spikes, the weight of the 1000 grains are significantly higher (p<0.05) in the SRI including yield compared to the traditional system. Transplanting density and plant duration are higher in TP (26±5.6 plants/m2 and 26 days) than in SRI (16±0.4 plants/m2 and 16 days). The lower the transplanting density, the higher the yield parameters and the yield. The economic profitability, determined based on the benefit/cost ratio, is higher in SRI (1.5) than in TP (1.2). The SRI required a lot of technicality in its implementation and generated more cost of production. However, SRI was more productive and economically more profitable than the traditional system.

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