Effect of Cultivars, Harvesting Time and Level of Nitrogen Fertilizer on Nitrate and Nitrite Content, Yield in Romaine Lettuce

Boroujerdnia, Maryam; Ansari, Naser Alemzadeh; Dehcordie, F. Sedighie

doi:10.3923/ajps.2007.550.553

Cited by 30 publications

(18 citation statements)

References 1 publication

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“…These doses are very highly significant (p < 0.001) compared to those obtained (30.19 and 45.49 t/ha) by applying the minimum doses of less than 60 kg/ha. This result is consistent with those of [28][29][30], who reported that increasing the N level from 0 to 120 kg N/ha had a positive effect on lettuce production. Nevertheless, in detail, the T4 treatment from the 2014-2015 trial shows a relatively lower yield of 50.25 t/ha compared to the T3 treatment (54.25 t/ha) from the same year.…”

Section: Physical and Chemical Characteristics Of The Soilsupporting

confidence: 93%

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Amirouche¹,

Smadhi²,

Zella³

2020

Nitrogen in Agriculture - Physiological, Agricultural and Ecological Aspects [Working Title]

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The present study is highlighted through an experiment carried out over two consecutive years 2014-2016, in the sub humid region of Algiers. The methodology adopted concerns the variation of optimal nitrogen doses and their effects on the evolution of lettuce (Lactuca sativa L.) cultivation, whose socioeconomic impact is proven, using isotopic nitrogen (15 N) and the AquaCrop model. The experimental design adopted is of the complete randomized block type, with four (04) levels: 0 (control), 60, 120, and 180 kg N/ha with four (04) replicates. The results obtained showed that the 120 kg N/ha dose is the efficient dose to cover the nitrogen requirements of lettuce with an efficiency of 74.48%. The accuracy of the model in calibration was tested using the following statistical indicators: R2, nRMSE, and d, which are, respectively, 0.64 < R 2 < 0.81; 18 < nRMSE <46.3 and 0.78 < d < 0.94 for canopy coverage and 0.92 < R 2 < 0.98; 21.6 < nRMSE <34.5 and 0.91 < d < 0.96 for dry biomass. The AquaCrop model could be recommended as a practical tool to better manage agricultural practices including fertilization.

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Section: Physical and Chemical Characteristics Of The Soilsupporting

confidence: 93%

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Amirouche¹,

Smadhi²,

Zella³

2020

Nitrogen in Agriculture - Physiological, Agricultural and Ecological Aspects [Working Title]

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“…Other researchers have observed that the rate of accumulation of nitrate in lettuce leaves increased when the nitrogen concentration increased from 60 to 120 kg N ha −1 showing no toxic effect in the plant [19]. The nitrate content in leaves of orchids increased continuously with doses of 10, 20, 30, 40 and 50 mM of N but only the last treatment (50 mM N) presented an abnormal N-concentration in the leaves [20].…”

Section: Nitrate Concentration In Leavesmentioning

confidence: 83%

Effect of Nitrogen Deficiency and Toxicity in Two Varieties of Tomatoes (Lycopersicum esculentum L.)

Frias-Moreno¹,

Núñez-Barrios²,

Pérez-Leal³

et al. 2014

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Tomato is one of the most important vegetables cultivated in Mexico. Nitrogen-based fertilizers have greatly contributed to the increase in tomato production; however, the excessive application of this fertilizer may affect yield and fruit quality. A greenhouse experiment was conducted to evaluate the effect of increasing in rates of nitrogen from deficiency to toxic levels. Five N-treatments (0, 15, 30, 45 and 60 mM of N) were applied in two tomato varieties, Caballero and Victoria The optimum N doses for leaf growth in both varieties was 30 mM reaching 13.0 and 13.5 cm in Caballero and Victoria respectively. At low toxic levels leaf growth was recovered more easily in Caballero than Victoria. Nitrate concentration for the low toxicity treatment was greater in leaf and stems for Caballero than Victoria; conversely nitrate in fruits was higher in Victoria. Final yield per plant was not statistically different between varieties except at the low toxic treatment where Caballero had a yield of 780 g per plant compared to that of 330 g per plant of Victoria. Tomato quality was also affected by the applied N-doses, where treatment 30 mM reached the maximum fruit firmness in both varieties while high toxic N-levels decreased significantly this parameter. Soluble solids and titratable acidity increased with increased N-Doses. Caballero variety seems to be more tolerant than Victoria at low levels of N-toxicity.

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“…Hal inilah yang menyebabkan peningkatan dosis pupuk N diikuti oleh peningkatan kandungan N dalam daun (Gambar 1). Hasil yang sama diperoleh Sholeh dan Djumali (2007) pada tembakau virginia rajangan dan Boroujerdnia et al (2007) pada tanaman leci.…”

Section: Hasil Dan Pembahasan Tanggapan Kandungan N Dan Klorofil Dalam Daun Serta Bobot Spesifik Daun Terhadap Dosis Pupuk Nunclassified

Tanggapan Fisiologi Tanaman Tembakau Temanggung terhadap Dosis Pupuk Nitrogen serta Kaitannya dengan Hasil dan Mutu Rajangan

Djumali¹

2016

Bul. Tan. Tembakau, Serat & Minyak Industri

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Tembakau temanggung merupakan tembakau lokal yang berkadar nikotin tinggi. Ketersediaan hara N dalam tanah dapat mempengaruhi hasil dan kandungan nikotin rajangan kering. Percobaan dilakukan di rumah ka-ca Balittas Malang selama Maret–Agustus 2009. Perlakuan terdiri atas 6 dosis pupuk N (0; 1,62; 3,64; 4,86; 6,48; dan 8,10 g N/tanaman) disusun dalam rancangan acak kelompok dengan 3 ulangan. Setiap perlakuan dalam satu ulangan terdiri atas 4 pot dan setiap pot diberi pupuk dasar 2,70 g P2O5 + 1,35 kg pupuk kandang. Hasil penelitian menunjukkan bahwa peubah fisiologi tanaman (kandungan N-daun, klorofil, bobot spesifik daun, laju fotosintesis, respirasi, efisiensi cahaya mereduksi CO2 (EF0), dan koefisien respirasi pemeliharaan daun (KRPD)), hasil rajangan kering, dan kandungan nikotin tembakau temanggung dipengaruhi oleh dosis pu-puk N dengan membentuk kurva kuadratik tertutup, dosis maksimum masing-masing sebesar 7,89; 7,89; 54,75; 9,50; 26,25; 21,50; 10,00; 6,08; dan 6,86 g N/tanaman. Peubah fisiologi tanaman yang paling menen-tukan hasil rajangan kering berturut-turut adalah klorofil, N-daun, laju respirasi, dan bobot spesifik daun. Adapun peubah fisiologi tanaman yang paling menentukan kandungan nikotin berturut-turut adalah fotosin-tesis, KRPD, respirasi, dan kandungan klorofil. Physiological Responses of Temanggung Tobacco to Dose of Nitrogen Fertilizer and Its Relationship with Dry Slice Yield and Nicotine Content ABSTRACT Temanggung tobacco is a local tobacco, with high nicotine content. Nitrogen available in soil affects dry sliced yield and nicotine content. The experiment was conducted in glasshouse of IToFCRI Malang from March–August 2009. The treatment consist of six levels of N fertilizer (0, 1.62, 3.64, 4.86, 6.48, and 8.10 g N/plant), were arranged in randomized block design with three replications. Every threatment in one repli-cation received 2.70 g P2O5 + 1.35 kg manure. The results showed that physiological plant parameters (N-leaf, chlorophyll content, specific leaf weight, photosynthesis rate, respiration rate, light efficiency to CO2 re-duction (EF0), and coefficient of leaf maintenance respiration (CLMR)), dry slice yield, and nicotine content were affected by N rates. The response of these parameters on N fertilizer were expressed by closed qua-dratic curves, which maximum rate of N fertilizer were 7.89, 7.89, 54.75, 9.50, 26.25, 21.50, 10.00, 6.08, and 6.86 g N/plant respectively. Dry sliced yield were affected by chlorophyll content, respiration rate, and specific leaf weight. Nicotine content were affected by photosynthesis rate, CLMR, respiration rate, and chlo-rophyll content.

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Effect of Cultivars, Harvesting Time and Level of Nitrogen Fertilizer on Nitrate and Nitrite Content, Yield in Romaine Lettuce

Cited by 30 publications

References 1 publication

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Effect of Nitrogen Deficiency and Toxicity in Two Varieties of Tomatoes (<i>Lycopersicum esculentum</i> L.)

Tanggapan Fisiologi Tanaman Tembakau Temanggung terhadap Dosis Pupuk Nitrogen serta Kaitannya dengan Hasil dan Mutu Rajangan

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Effect of Cultivars, Harvesting Time and Level of Nitrogen Fertilizer on Nitrate and Nitrite Content, Yield in Romaine Lettuce

Cited by 30 publications

References 1 publication

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Modeling of Nitrogen Use Efficiency in Lettuce Culture (Lactuca sativa): Isotopic Nitrogen (15 N) and AquaCrop

Effect of Nitrogen Deficiency and Toxicity in Two Varieties of Tomatoes (&lt;i&gt;Lycopersicum esculentum&lt;/i&gt; L.)

Tanggapan Fisiologi Tanaman Tembakau Temanggung terhadap Dosis Pupuk Nitrogen serta Kaitannya dengan Hasil dan Mutu Rajangan

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Product

Resources

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Effect of Nitrogen Deficiency and Toxicity in Two Varieties of Tomatoes (<i>Lycopersicum esculentum</i> L.)