Agronomic, Water Productivity and Economic Analysis of Irrigated Rice under Different Nitrogen and Water Management Methods

Yakubu, A. M.; Ofori, J.; Amoatey, Christiana Adukwei; Kadyampakeni, Davie M.

doi:10.4236/as.2019.101008

Cited by 8 publications

(11 citation statements)

References 20 publications

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“…The weights ranged from 24.6 to 30.8 as shown in Table 9. This is contrary to the findings of Yakubu [64], who reported that 1000-grain weight was not significantly (p > 0.05) influenced by N fertilizer and water management, as well as their interaction. However, these results conform to those of Yakubu [64] under interaction, in which there was no significant difference.…”

Section: Effect Of Water Management Nitrogen Levels and Their Interaction On Yield Characteristics Of Ricecontrasting

confidence: 99%

“…This is contrary to the findings of Yakubu [64], who reported that 1000-grain weight was not significantly (p > 0.05) influenced by N fertilizer and water management, as well as their interaction. However, these results conform to those of Yakubu [64] under interaction, in which there was no significant difference. Straw yield; water management, nitrogen levels, and the interactions had a significant effect on straw yield.…”

Section: Effect Of Water Management Nitrogen Levels and Their Interaction On Yield Characteristics Of Ricecontrasting

confidence: 99%

“…Similar results were reported by [61,62] in that nitrogen fertilization has a tendency to increase plant height as nitrogen is involved in cell division and cell elongation of plants. These results are in agreement with [63,64], who reported an increase of plant height under AWD water management and 90 kg N ha −1 nitrogen level. However, Zheng et al [65] reported contradicting results from China, showing that the final plant height was significantly higher under flooding irrigation than of that under water-saving irrigation treatments during both years of experiments.…”

Section: Effect Of Water Management and Nitrogen Levels On Plant Height And Number Of Tillerssupporting

confidence: 93%

“…Yakubu et al [64] and Thakur et al [88] reported the superiority of AWD on improving water productivity over CF. Kahimba et al [16], who conducted the study at Mkindo site and reported the water productivity ranging from 0.14 to 0.47 kg m −3 , and the highest was reported in the AWD irrigation regime.…”

Section: Water Productivitymentioning

confidence: 99%

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Evaluation of Growth, Yield, and Water Productivity of Paddy Rice with Water-Saving Irrigation and Optimization of Nitrogen Fertilization

et al. 2021

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Rice production in Tanzania, with 67% of its territory considered semi-dry and having average annual rainfall of 300 mm, must be increased to feed an ever-growing population. Water for irrigation and low soil fertility are among the main challenges. One way to decrease water consumption in paddy fields is to change the irrigation regime for rice production, replacing continuous flooding with alternate wetting and drying. In order to assess the impact of different irrigation regimes and nitrogen fertilizer applications on growth, yield, and water productivity of rice, a greenhouse pot experiment with soil from lowland rice ecology was conducted at Sokoine University of Agriculture, Tanzania during the 2019 cropping season. The experiment was split-plot based on randomized complete block design with 12 treatments and 3 replications. Water regimes were the main factors comparing continuous flooding (CF) and alternate wetting and drying (AWD) with nitrogen fertilizer levels as the subfactor, comparing absolute control (no fertilizer) with 0 (P and K fertilizers), 60, 90, 120, and 150 kg Nha−1. Alternate wetting and drying (AWD) significantly improved water productivity by 8.3% over CF (p < 0.05). Water productivity (WP) ranged from 0.6 to 1.5 kg of rice per m3 of water. Average water use ranged from 36 to 82 L per season, and water saving was up to 34.3%. Alternate wetting and drying significantly improved yields (p < 0.05) by 13.3%, and the yield ranged from 21.8 to 118.2 g pot−1. The combination of AWD water management and 60 kg N ha−1 nitrogen fertilization application was found to be the optimal management, however there was no significant difference between 60 and 90 kg N ha−1, in which case 60 kg N ha−1 is recommended because it lowers costs and raises net income. Nitrogen levels significantly affected water productivity, water use, and number of irrigations. Nitrogen levels had significant effect (p < 0.05) on plant height, number of tillers, flag leaf area, chlorophyll content, total tillers, number of productive tillers, panicle weight, panicle length, 1000-grain weight, straw yield, grain yield, and grain harvest index. The results showed that less water can be used to produce more crops under alternative wetting and drying irrigation practices. The results are important for water-scarce areas, providing useful information to policy makers, farmers, agricultural departments, and water management boards in devising future climate-smart adaptation and mitigation strategies.

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Section: Effect Of Water Management Nitrogen Levels and Their Interaction On Yield Characteristics Of Ricecontrasting

confidence: 99%

Section: Effect Of Water Management Nitrogen Levels and Their Interaction On Yield Characteristics Of Ricecontrasting

confidence: 99%

Section: Effect Of Water Management and Nitrogen Levels On Plant Height And Number Of Tillerssupporting

confidence: 93%

Section: Water Productivitymentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Growth, Yield, and Water Productivity of Paddy Rice with Water-Saving Irrigation and Optimization of Nitrogen Fertilization

et al. 2021

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“…Similar results were reported by Mazumder et al, 2019; Chen et al (2013) that nitrogen fertilization has a tendency to increase plant height as nitrogen involves cell division and cell elongation of plants. These results are in agreement with Yakubu et al, 2019, who reported increase of plant height under AWD water management and 90 kg N ha -1 nitrogen level. Zheng et al 2020 reported the contradicting results showing that the final plant height was significantly higher under flooding irrigation than that under water-saving irrigation treatments during both years of experiments.…”

Section: Trial With Lowland Soilsupporting

confidence: 93%

Evaluation of Water Productivity and Agronomic Performance of Paddy Rice Through Water Saving Irrigation and Nitrogen Fertilization

Mboyerwa¹,

Mtakwa²,

Kibret³

et al. 2020

Preprint

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Tanzania with 945 million hectares of land area and annual rainfall of 300 mm on 67% of its territorial land is considered as a semi-dry region in the world. Rice production in Tanzania needs to be increased to feed a growing population, whereas water for irrigation is getting scarce. One way to decrease water consumption in paddy fields is to change the irrigation regime for rice production and to replace continuous flooding with alternate wetting and drying. In order to investigate the effect of different regimes of irrigation and nitrogen fertilizer on yield and water productivity of hybrid rice, two greenhouse pot experiments comprising soils from upland and lowland production ecologies were conducted at Sokoine University of Agriculture, Tanzania during crop seasons of 2019. The experiment was arranged in split plots based on randomized completely block design with 3 replications. Water regimes were the main factor comparing continuous flooding (CF) and alternate wetting and drying (AWD) with nitrogen fertilizer levels as the sub-factor including absolute control , 0, 60, 90, 120 and 150 kg/ha. Alternate wetting and drying (AWD) improved water productivity in both upland and lowland production ecologies compared to CF. AWD increased yield under lowland production by 13.3% while in upland there was 18.5% decrease in yield. The average water use varied from 31.5 to 84 L pot-1 under upland trials, while in lowland trials it was 36 to 82.3 L. Higher yield and lower water application led to an increase in WP varying from 1.2 to 1.8 kg cm-3 under upland trials, and 0.6 to 1.5 kg cm-3 under lowland trials. The variation in water productivity among treatments was mainly due to the differences in the yield, water and nitrogen levels used in the production process. Both sets of trials recorded water saving up to 34.3% and 17.3% under lowland and upland trials, respectively. Under upland trials, the yield varied from 39.9 to 124.1 g pot-1 and in lowland trials yield ranged from 20.6 to 118.2 g pot-1 representing paddy rice. The measurements showed that less water can be used to produce more crops under alternative rice growing practices. The results are important for water-scarce areas, providing useful information to policy makers, farmers, agricultural departments, and water management boards in devising future climate-smart adaptation and mitigation strategies.

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Moderate N fertilizer inputs under proper water management enhanced off-season rice production in central Benin, West Africa

Geoffroy Sossa,

Naab,

Sanogo

et al. 2024

Irrig Sci

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Agronomic, Water Productivity and Economic Analysis of Irrigated Rice under Different Nitrogen and Water Management Methods

Cited by 8 publications

References 20 publications

Evaluation of Growth, Yield, and Water Productivity of Paddy Rice with Water-Saving Irrigation and Optimization of Nitrogen Fertilization

Evaluation of Growth, Yield, and Water Productivity of Paddy Rice with Water-Saving Irrigation and Optimization of Nitrogen Fertilization

Evaluation of Water Productivity and Agronomic Performance of Paddy Rice Through Water Saving Irrigation and Nitrogen Fertilization

Moderate N fertilizer inputs under proper water management enhanced off-season rice production in central Benin, West Africa

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