Effects of Nitrogen Fertilizers on the Growth and Nitrate Content of Lettuce (Lactuca sativa L.)

Cheng-wei, Liu; Sung, Yunsick; Chen, Bo-Ching; Lai, Hung-Yu

doi:10.3390/ijerph110404427

Cited by 306 publications

(220 citation statements)

References 41 publications

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“…Nitrogen, phosphorus, and potassium are three major elements necessary for plant growth 9 . Nitrogen is an integral element for proteins, and promotes leaf growth of plants [10][11][12] . Phosphorus promotes the growth of flowers and fruits 13,14 , potassium also helps leaf growth 15,16 .…”

Section: Introductionmentioning

confidence: 99%

Multi-spark discharge system for preparation of nutritious water

Nakaso

Harigai

Kusumawan

et al. 2018

AIP Conference Proceedings

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Abstract. The nitrogen compound concentration in water is increased by atmospheric-pressure plasma discharge treatment. A rod-to-water electrode discharge treatment system using plasma discharge has been developed by our group to obtain water with a high concentration of nitrogen compounds, and this plasma-treated water improves the growth of chrysanthemum roots. However, it is difficult to apply the system to the agriculture because the amount of treated water obtained by using the system too small. In this study, a multi-spark discharge system (MSDS) equipped multiple spark plugs is presented to obtain a large amount of plasma-treated water. The MSDS consisted of inexpensive parts in order to reduce the system introduction cost for agriculture. To suppress the temperature increase of the spark plugs, the 9 spark plugs were divided into 3 groups, which were discharged in order. The plasma-treated water with a NO 3 -concentration of 50 mg/L was prepared using the MSDS for 90 min, and the treatment efficiency was about 6 times higher than that of our previous system. It was confirmed that the NO 2 -, O 3 , and H 2 O 2 concentrations in the water were also increased by treating the water using the MSDS.

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Section: Introductionmentioning

confidence: 99%

Multi-spark discharge system for preparation of nutritious water

Nakaso

Harigai

Kusumawan

et al. 2018

AIP Conference Proceedings

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“…While soil nitrogen is critical for plant growth [66], soil Mn is an essential micro-nutrient and is the key to the entire status of soil redox [67]. A potentially low redox is known to negatively affect soil microorganisms [68], which is probably reflected from the low MBC values in the roadside soils.…”

Section: Modulation Of Plant Traits Along Roadsidesmentioning

confidence: 99%

Do Plants Have a Choice of Traits to Be Modulated? Evidence from an Invasive Plant <i>Mikania micrantha</i> Kunth in Different Urban Environments

Banerjee¹,

Ghosh²,

Dewanji³

2017

AJPS

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The successful establishment of an invasive plant in a novel environment has been attributed to the phenotypic plasticity of plant traits, with most studies focussing on vegetative trait plasticity in either experimental and/or natural habitat conditions. This study explores the role of phenotypic plasticity, in both vegetative and reproductive traits, of an invasive plant Mikania micrantha growing as a ground cover in diverse urban areas in the city of Kolkata, India. Quadrat based plant and soil sampling was conducted in three habitat types, namely roadsides, natural areas and abandoned plots, from four regions within the city. The above ground biomass and fitness related vegetative and seed traits were estimated from the plant samples whereas soil macro-and micro-nutrients as well as soil health (in terms of organic carbon and microbial biomass carbon) were estimated from the soil samples. Habitat-specific selection of traits in M. micrantha was observed in this study. In roadside population which has more chances of long distance dispersal, the excessive production of reproductive biomass as a compensatory response to the low germination ability of the seeds was evident. In natural areas which are more prone to anthropogenic disturbance and where the plant has greater chances of local spread, modulation of both vegetative (higher SLA) and reproductive traits (lighter seeds with faster germination ability) helped the plant to maintain its population. In abandoned plots where there was more number of associated species, the longer span of germination and increased population height ensured the survivability of M. micrantha in the community. Thus, a continuous monitoring program to check for M. micrantha growth should be prioritized in urban areas due to its immense trait plasticity in different habitat conditions where uncontrolled growth can lead to its establishment and spread, thereby making its control more difficult.

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“…In improving agricultural production, N plays a vital role in supplying nutrients to the rice plant despite of losses due to late absorption or excessive application (Liu et al, 2014). In connection to this, the timing of fertiliser application remains in concern.…”

Section: Effect Of N Fertiliser On Aerobic Ricementioning

confidence: 99%

Effect of N fertilizer on the emergence and seedling growth of Eleusine indica in aerobic rice systems

Selvarajh¹,

Zain²,

Seng³

2017

Plant Omics

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Weed has become one of the most serious problems in aerobic rice systems. Weed management in aerobic rice system needs a manipulation of optimum N fertilizer application to control the weed and simultaneously enhance aerobic rice growth performance. In this study, three types of N sources (urea, ammonium sulphate and ammonium nitrate) with concentration starting from (0, 60, 120, 180 and 240 kg ha -1 ) were evaluated for effective control of the bioassay species, Eleusine indica, while observing the rice injury level. The data on weed (emergence and shoot fresh weight), while rice growth (root length, shoot fresh weight, shoot height and leaf greenness) was collected in this study. It was found that urea at a higher application rate of 240 kg ha -1 strongly inhibit the emergence and shoot growth of E. indica by >78%. Conversely, ammonium sulphate and ammonium nitrate gave moderate inhibition (58-65% inhibition) on weed emergence and shoot growth at higher application rates of 240 kg ha -1 , respectively. Significant stimulation effect on rice root growth, shoot height, shoot fresh weight and leaf greenness was noticed at a low application rate of 60 kg ha -1 urea, while ammonium sulphate and ammonium nitrate only exerts its stimulation effect starting at 120 kg ha -1 . Stimulation effect on the rice growth was likely negligible at 0 and 4 DAS across urea, ammonium sulphate and ammonium nitrate application rates. However, the rice plants growth increases with increasing growth stage. The finding suggest that application of urea at 240 kg ha -1 starting from 8 DAS of rice growth stage was the most efficient application rate in inhibiting E. indica with the stimulation effect on the growth of rice seedlings.

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Effects of Nitrogen Fertilizers on the Growth and Nitrate Content of Lettuce (Lactuca sativa L.)

Cited by 306 publications

References 41 publications

Multi-spark discharge system for preparation of nutritious water

Multi-spark discharge system for preparation of nutritious water

Do Plants Have a Choice of Traits to Be Modulated? Evidence from an Invasive Plant <i>Mikania micrantha</i> Kunth in Different Urban Environments

Effect of N fertilizer on the emergence and seedling growth of Eleusine indica in aerobic rice systems

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Effects of Nitrogen Fertilizers on the Growth and Nitrate Content of Lettuce (Lactuca sativa L.)

Cited by 306 publications

References 41 publications

Multi-spark discharge system for preparation of nutritious water

Multi-spark discharge system for preparation of nutritious water

Do Plants Have a Choice of Traits to Be Modulated? Evidence from an Invasive Plant &lt;i&gt;Mikania micrantha&lt;/i&gt; Kunth in Different Urban Environments

Effect of N fertilizer on the emergence and seedling growth of Eleusine indica in aerobic rice systems

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Do Plants Have a Choice of Traits to Be Modulated? Evidence from an Invasive Plant <i>Mikania micrantha</i> Kunth in Different Urban Environments