Managing Soil Nitrogen under Rain-Fed Lowland Rice Production Systems in the Forest Agroecological Zones in Ghana

2016 ◽

Vol 8 (1) ◽

pp. 284-289

Author(s):

S. Kanimoli ◽

K. Kumar

Keyword(s):

Acetylene Reduction ◽

Tamil Nadu ◽

Production Systems ◽

Nitrogenase Activity ◽

Rice Production ◽

Lowland Rice ◽

Aerobic Rice ◽

Marked Variation ◽

Reduction Assay ◽

First Time

The present study was carried out to evaluate the nitrogen fixing ability of diazotrophs isolated from the rhizosphere soils of rice which were grown in three different rice growing systems. A total of hundred and ten isolates obtained were subjected to Acetylene Reduction Assay (ARA) and ninety eight isolates recorded significant amount of nitrogenase activity in a range of 185.73 to 3794.55 nmoles of ethylene mg of protein-1 h-1. The highest nitrogenase activity was recorded by Derxia (3794.55 nmoles of ethylene mg of protein-1 h-1) isolated from Trichy (lowland). Among the three different rice production systems, isolates obtained from lowland rice (Derxia â€“ 3794.5 nmoles of ethylene mg of protein-1 h-1) recorded higher nitrogenase activity followed by Aerobic (Pseudomonas - 2194.89 nmoles of ethylene mg of protein-1 h-1) and SRI (Azotobacter - 1971.85 nmoles of ethylene mg of protein-1 h-1) rice isolates. The results revealed marked variation in the ARA of the diazotrophic isolates obtained from lowland, SRI and Aerobic rice. The nitrogenase activity of diazotrophs from rice fields have been reported earlier but the nitrogenase activity of diazotrophs from three different rice production systems from various parts of Tamil Nadu is reported for the first time from India.

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Participatory evaluation of mechanical weeders in lowland rice production systems in Benin

Crop Protection ◽

10.1016/j.cropro.2014.03.009 ◽

2014 ◽

Vol 61 ◽

pp. 32-37 ◽

Cited By ~ 10

Author(s):

Sylvestre Gongotchame ◽

Ibnou Dieng ◽

Kokou Ahouanton ◽

Jean-Martial Johnson ◽

Amakoe Delali Alognon ◽

...

Keyword(s):

Production Systems ◽

Participatory Evaluation ◽

Rice Production ◽

Lowland Rice

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Genotypic Differences and Nitrogen Uptake of Lowland Rice (Oryza sativa L.) under Two Production Systems and N Application

Science and Humanities Journal ◽

10.47773/shj.1998.121.4 ◽

2019 ◽

Vol 13 (1) ◽

pp. 30-47

Author(s):

Mark Joshua Quevedo ◽

◽

Ruth Escasinas ◽

Dionesio Bañoc ◽

Keyword(s):

Climate Change ◽

Grain Yield ◽

Production System ◽

Hybrid Rice ◽

Production Systems ◽

Rice Production ◽

Lowland Rice ◽

N Application ◽

Area Index ◽

Conventional Production

Climate change has been causing low yield in rice production. In order to counter the negative effects of climate change in rice production, it is important to choose a suitable variety and production system, as well as application of nitrogen. This study sought to determine the agronomic and yield performance of inbred and hybrid rice under System of Rice Intensification (SRI) and conventional production systems, as well as evaluate the Nitrogen Use Efficiency (NUE) of these varieties under two production systems and N application. The experiment was laid out in a nested design in RCBD with varieties as the main plot and N application as subplot -1 -1 (0 kg N ha and 90 kg N ha ) under two production systems. Inbred rice grown under SRI headed earlier than hybrid rice in similar condition and both varieties in the conventional production system. Irrespective of production system, hybrid variety and those applied with N were taller than inbred without N application. Regardless of the variety and levels of N applied, lowland rice grown under SRI produced the most productive tillers, heaviest1,000 grains, heaviest root pulling resistance (RPR), and highest leaf area index(LAI). In terms of N levels, grain yield was higher when 90 kg of N was applied in both production systems than without N. Both varieties had -1 comparable grain yield when applied with 90 kg N ha . Highest NUE was obtained -1 under SRI with application of 90 kg N ha and under conventional system without N application. Thus, rice grown under SRI had better utilization of applied N. Meanwhile, water supplied in SRI was reduced by 32% compared to the conventional production system.

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Leaching loss of dissolved organic nitrogen from cropland ecosystems

Environmental Reviews ◽

10.1139/er-2020-0059 ◽

2020 ◽

Author(s):

Hao Liang ◽

Songjuan Gao ◽

Zhiming Qi ◽

Kelin Hu ◽

Junzeng Xu

Keyword(s):

Dissolved Organic Nitrogen ◽

Organic Nitrogen ◽

Management Practices ◽

Production Systems ◽

Cropping Systems ◽

Rice Production ◽

Lowland Rice ◽

N Leaching ◽

Ecosystem Research ◽

Leaching Loss

While widely studied in grassland and forest ecosystems, dissolved organic nitrogen (DON), an important form of N lost through leaching, has received little attention in cropland ecosystem research. A global literature review and partial least squares path modeling (PLS-PM) were adopted to assess the quantity and composition of N leaching loss under different cropping systems, soil types, and management practices, as well as to identify the major factors controlling DON leaching. Annual total dissolved nitrogen (TDN, organic + inorganic N) leaching under different cropping systems ranged from 4.0 to 383.2 kg N ha-1. Vegetable and rice production systems showed the greatest and least TDN leaching, respectively. Across different cropping systems, DON accounted for 4.7%–34.9% of TDN in leachate. The NH_4^+ N form of N leaching is negligible in most upland cropping systems (< 2.3%), but not so in lowland rice systems. The largest ratio of DON leaching to TDN leaching was found in a rice-wheat rotation (34.9%). Cropping systems in which animal manure or plant compost was applied or lowland rice was included showed a relatively high DON leaching ratio. Accordingly, in investigating DON leaching, more attention should be focused on cropping systems with manure application or lowland rice systems. Compared to climatic conditions and soil properties, field management practices (irrigation, chemical N input, and manure amendments) proved to be the factors most strongly influencing DON leaching. This suggests that optimizing water and N management practices is the most effective way of reducing the risk of DON leaching and increasing N use efficiency, particularly for vegetable and rice production systems.

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Transplanting as an option to cope with abiotic stress in high‐altitude lowland rice production systems in East Africa

Journal of Agronomy and Crop Science ◽

10.1111/jac.12540 ◽

2021 ◽

Author(s):

Bayuh Belay Abera ◽

Kalimuthu Senthilkumar ◽

Marc Cotter ◽

Folkard Asch

Keyword(s):

Abiotic Stress ◽

High Altitude ◽

East Africa ◽

Production Systems ◽

Rice Production ◽

Lowland Rice

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Effect of Simulated Flooding and Nitrogen Application on Nitrogen Uptake of Rice

Bangladesh Agronomy Journal ◽

10.3329/baj.v20i1.34884 ◽

2017 ◽

Vol 20 (1) ◽

pp. 67-75

Author(s):

JA Adjetey ◽

QS Mulbah

Keyword(s):

Water Resources ◽

Grain Yield ◽

Nitrogen Uptake ◽

Nitrogen Use Efficiency ◽

Production Systems ◽

Rice Production ◽

Lowland Rice ◽

Nitrogen Application ◽

Nitrogen Use ◽

Use Efficiency

In lowland rice production systems, flooding patterns vary during the cropping period and this poses a serious challenge to productivity due to the effect of flooding on the availability and uptake of nitrogen. The aim of this study was to examine the influence of various flooding patterns on nitrogen use in rice grown under simulated wetland conditions. Rice was grown in a greenhouse at 0, 110 and 220 kg N ha-1 under well watered control conditions, continuous flooding, early flooding at tillering, and late flooding post-tillering. The results showed that continuous and early flooding increased tiller production and grain yield compared to late flooding or non-flooded conditions. Although the highest grain yields under the different flooding patterns were obtained with 220 kg N ha-1, the combination of 110 kg N ha-1 and early flooding also significantly increased tiller productivity, nitrogen recovery, and agronomic nitrogen use efficiency (NUE). There is the need to regulate the supply of nitrogen and water resources if grain yield and NUE has to be increased at minimal costs. Also, compared to well-watered conditions, rice production under flooded conditions lead to increased productivity and N rate must match realistic target yields. Best results are obtained when flooding occurs in the early rather than later parts of the season.Bangladesh Agron. J. 2017, 20(1): 67-75

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High Nitrogen Fertilization Modulates Morpho-Physiological Responses, Yield, and Water Productivity of Lowland Rice under Deficit Irrigation

Agronomy ◽

10.3390/agronomy11071291 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1291

Author(s):

Nasr M. Abdou ◽

Mohamed A. Abdel-Razek ◽

Shimaa A. Abd El-Mageed ◽

Wael M. Semida ◽

Ahmed A. A. Leilah ◽

...

Keyword(s):

Nitrogen Fertilizer ◽

Irrigation Water ◽

Nitrogen Fertilization ◽

Deficit Irrigation ◽

Physiological Responses ◽

Water Productivity ◽

Water Shortage ◽

Rice Production ◽

Lowland Rice ◽

Nitrogen Fertilizers

Sustainability of rice production under flooding conditions has been challenged by water shortage and food demand. Applying higher nitrogen fertilization could be a practical solution to alleviate the deleterious effects of water stress on lowland rice (Oryza sativa L.) in semi-arid conditions. For this purpose, field experiments were conducted during the summer of 2017 and 2018 seasons. These trials were conducted as split-split based on randomized complete blocks design with soil moisture regimes at three levels (120, 100 and 80% of crop evapotranspiration (ETc), nitrogen fertilizers at two levels (N1—165 and N2—200 kg N ha−1) and three lowland Egyptian rice varieties [V1 (Giza178), V2 (Giza177) and V3 (Sakha104)] using three replications. For all varieties, growth (plant height, tillers No, effective tillers no), water status ((relative water content RWC, and membrane stability index, MSI), physiological responses (chlorophyll fluorescence, Relative chlorophyll content (SPAD), and yield were significantly increased with higher addition of nitrogen fertilizer under all water regimes. Variety V1 produced the highest grain yield compared to other varieties and the increases were 38% and 15% compared with V2 and V3, respectively. Increasing nitrogen up to 200 kg N ha−1 (N2) resulted in an increase in grain and straw yields by 12.7 and 18.2%, respectively, compared with N1. The highest irrigation water productivity (IWP) was recorded under I2 (0.89 kg m−3) compared to (0.83 kg m−3) and (0.82 kg m−3) for I1 and I3, respectively. Therefore, the new applied agro-management practice (deficit irrigation and higher nitrogen fertilizer) effectively saved irrigation water input by 50–60% when compared with the traditional cultivation method (flooding system). Hence, the new proposed innovative method for rice cultivation could be a promising strategy for enhancing the sustainability of rice production under water shortage conditions.

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