scholarly journals Effects of Hydrogen Peroxide on Organically Fertilized Hydroponic Lettuce (Lactuca sativa L.)

Horticulturae ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 106
Author(s):  
Vanessa Lau ◽  
Neil Mattson
Keyword(s):  
Hydrogen Peroxide ◽  
Lactuca Sativa ◽  
Organic Fertilizer ◽  
Plant Size ◽  
Organic Fertilizers ◽  
H2o2 Treatment ◽  
Lactuca Sativa L ◽  
Lettuce Yield ◽  
Fertilizer Combination ◽  
The Impact

Hydroponic production typically uses conventional fertilizers, but information is lacking on the use of organic hydroponic fertilizers. Development of microbial communities and biofilm that can reduce dissolved oxygen availability is a difficulty with organic hydroponics. One potential solution is the use of hydrogen peroxide (H2O2) which can reduce microbial populations and decompose to form oxygen. However, information is lacking on the impact of hydrogen peroxide on hydroponic crop performance. The aim of this study was to determine the effects of H2O2 concentrations in deep water culture hydroponics by assessing how it affects plant size and yield in lettuce (Lactuca sativa L.) “Rouxai”. In this experiment, three H2O2 treatments, namely the application of 0, 37.5 or 75 mg/L H2O2 to 4 L aerated hydroponic containers with either conventional or organic fertilizer, were compared. The containers had either fish-based organic fertilizer (4-4-1, N-P2O5-K2O) or inorganic mineral based conventional nutrient solution (21-5-20, N-P2O5-K2O), both applied at 150 mg/L N. Three replicates of each H2O2 treatment–fertilizer combination were prepared resulting in a total of eighteen mini hydroponic containers each with one head of lettuce. There were two growth cycles: fall 2018 and spring 2019. When added to conventional fertilizers, both 37.5 mg/L and 75 mg/L of H2O2 led to stunted growth or death of lettuce plants. However, when 37.5 mg/L of H2O2 was applied to organic fertilizers, the lettuce yield nearly matched that of the conventionally fertilized control, demonstrating that the application of H2O2 has the potential to make organic hydroponic fertilization a more viable method in the future.

scholarly journals Effects of Hydrogen Peroxide on Organically Fertilized Hydroponic Lettuce (Lactuca sativa L.)

2021 ◽  
Author(s):  
Vanessa Lau ◽  
Neil Mattson
Keyword(s):  
Hydrogen Peroxide ◽  
Lactuca Sativa ◽  
Plant Size ◽  
Organic Fertilizers ◽  
Microbial Populations ◽  
Stunted Growth ◽  
Lactuca Sativa L ◽  
Lettuce Yield ◽  
The Impact ◽  
Viable Method

AbstractHydroponic production typically uses conventional fertilizers and information is lacking on the use of organic hydroponic fertilizers. Development of biofilm is a common problem with organic hydroponics which can reduce dissolved oxygen availability to roots. One potential solution is the use of hydrogen peroxide, H2O2 which can reduce microbial populations and decomposes to form oxygen. However, information is lacking on the impact of hydrogen peroxide on hydroponic crops. The aim of this study was to determine the effects of H2O2 concentrations in deep water culture hydroponics by assessing how it affects plant size and yield in lettuce (Lactuca sativa L.) ‘Rouxai’. In this experiment, three different treatments consisting of a control without H2O2, and the application of 37.5 mg/L or 75 mg/L of hydrogen peroxide were added to aerated 4-L reservoirs that contained either organic (4-4-1) or inorganic nutrients (21-5-20), both applied at 150 mg·L-1 N. Three replicates for each treatment and each fertilizer were prepared resulting in a total of eighteen mini hydroponic containers each with one head of lettuce. When added to conventional fertilizers, concentrations of 37.5 mg/L and 75 mg/L of H2O2 led to stunted growth or death lettuce plants. However, when 37.5 mg/L of H2O2 was applied to organic fertilizers, the lettuce yield nearly matched that of the conventionally fertilized control, demonstrating that the application of H2O2 has the potential to make organic hydroponic fertilization a more viable method in the future.

scholarly journals Effects of Hydrogen Peroxide on Hydroponic Lettuce Grown With Conventional and Organic Fertilizers [Cornell University]

2019 ◽  
Author(s):  
Vanessa M. Lau ◽  
Neil S. Mattson
Keyword(s):  
Hydrogen Peroxide ◽  
Microbial Respiration ◽  
Root Zone ◽  
Organic Fertilizers ◽  
Pathogenic Microorganisms ◽  
Trial And Error ◽  
Dissolved Oxygen Concentration ◽  
Cornell University ◽  
Lactuca Sativa L ◽  
Lettuce Yield

H2O2, commonly referred to as hydrogen peroxide, is an unstable oxidizing agent often used by hydroponic growers to help clear unwanted biofilm and pathogenic microorganisms by releasing free radicals that interact with the microbes. Other byproducts produced by the decomposition of hydrogen peroxide are simply H2O and O2. The released O2 increases the dissolved oxygen concentration in the root zone and may also help reduce oxygen losses to biofilm and microbial respiration. However, the suggested concentration of hydrogen peroxide varies greatly among hobbyists and are typically determined on a trial and error basis and excess H2O2 can cause damage to roots. With little to no scientifically backed information available on the topic, the aim of this study is to determine the effect of H2O2 concentrations in deep water culture hydroponics by assessing how it affects biofilm caused by the use of organic fertilizers, root development, and consequently, yield in lettuce (Lactuca sativa L.) ‘Oak Leaf’. In this experiment, three different treatments consisting of a control, 1.25 mL/L, and 2.5 mL/L of hydrogen peroxide are added to aerated 4-L reservoirs that are fertilized with either organic (4-1-1) or inorganic nutrients (21-5-20), both applied at 150 mg·L-1 N. Three replicates for each treatment and each fertilizer are prepared resulting in a total of eighteen reservoirs with one head of lettuce in each. By the end of this study, it was found that when added to conventional fertilizers, doses of 1.25 mL/L and 2.5 mL/L of hydrogen peroxide stunted the growth of or killed the heads of lettuce.  However, when applied to organic fertilizers, the lettuce yield nearly matched that of the conventionally fertilized control.

scholarly journals Growth Response of Hydroponic Lactuca sativa L. to Application of Fertilizer Organic VIUSID Agro®

2020 ◽  
Vol 12 (11) ◽  
pp. 268
Author(s):  
Alexson Vieira Pordeus ◽  
Lucas de Assis Moraes ◽  
David de Oliveira Medeiros ◽  
Letícia Carvalho Benitez
Keyword(s):  
Lactuca Sativa ◽  
Root Length ◽  
New Technologies ◽  
Foliar Application ◽  
Organic Fertilizer ◽  
Morphological Characteristics ◽  
Lactuca Sativa L ◽  
Dry Biomass ◽  
The Impact ◽  
Plant Length

Lettuce (Lactuca sativa L.) production is a valuable crop for supporting family farms in the Brazilian semiarid region. The cultivation of this vegetable in a hydroponic system with foliar application of organic fertilizer can help in mitigating the challenges imposed by the region’s edaphoclimatic conditions. Therefore, it is important to increase the lettuce production using new technologies. VIUSID Agro® is an example of such technology that has the potential to increase lettuce yields. VIUSID Agro® is a natural compound that actives molecular processes without affecting the environment adversely. This product acts as a natural bioregulator and is basically composed of amino acids, vitamins, and minerals. The experiment’s objective was to analyze the impact of VIUSID Agro® organic fertilizer on the growth of hydroponic lettuce. The research was conducted on a family farm in Bom Jesus, Paraíba state, Brazil. The experimental was a completely randomized design with 5 VIUSID VIUSID Agro® concentrations (0.0; 0.2; 0.4; 0.6 and 0.8 mL L-1) and 15 replications. Among the indicators evaluated were the plant length, leaf number, stem diameter, root length, and fresh and dry biomass. The results showed that the 0.4 mL L-1 VIUSID Agro® concentration produced greater growth than the control (0.0 mL L-1) for variables analyzed plant length, fresh and dry biomass of aerial portion, root length, fresh and dry biomass of root. The foliar application of VIUSID Agro® improved the performance of the lettuce morphological characteristics in a hydroponic cultivation system. Although this is the first Brazil research evaluating VIUSID Agro® as an organic fertilizer in hydroponic lettuce, results have shown promise.

scholarly journals The Impact of Organic Fertilizer Produced with Vegetable Residues in Lettuce (Lactuca sativa L.) Cultivation and Antioxidant Activity

2020 ◽  
Vol 13 (1) ◽  
pp. 128
Author(s):  
Tamara Righetti Tupini Cavalheiro ◽  
Raquel de Oliveira Alcoforado ◽  
Vinicius Soares de Abreu Silva ◽  
Pedro Paulo Saldanha Coimbra ◽  
Nathânia de Sá Mendes ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Organic Waste ◽  
Organic Fertilizer ◽  
Organic Fertilizers ◽  
Soil P ◽  
Onion Peel ◽  
Lettuce Seeds ◽  
Lactuca Sativa L ◽  
Lettuce Growth ◽  
The Impact

Large amounts of organic waste are produced worldwide. This work aims to evaluate the influence of organic fertilizers, onion peel flour (OPF) and fruit and vegetable flour (FVF) on lettuce cultivation. Lettuce seeds were planted in pure soil (P), P with 10% OPF, and P with 3% FVF. Soil and lettuce leaves were analyzed. The addition of OPF and FVF improved soil quality but only in the soil with FVF was there significant lettuce growth and increase of antioxidant activity: Folin (8.89 mg EAG/g FM), FRAP (1.31 mg Fe2+/g FM), ABTS (4.09 mg TEAC/g−1 FM) and ORAC (0.52 mg TEac/g−1 FM). The present results show an improvement in lettuce nutritional quality and the potential of FVF as an organic fertilizer.

scholarly journals Pengaruh Konsentrasi Pupuk Hayati Bioboost Terhadap Peningkatan Produksi Tanaman Selada (Lactuca sativa. L)

Agrologia ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
A. P Manuhuttu ◽  
Herman Rehatta ◽  
J.J.G Kailola
Keyword(s):  
Lactuca Sativa ◽  
Block Design ◽  
Economic Value ◽  
Organic Fertilizers ◽  
Plant Populations ◽  
Lactuca Sativa L ◽  
Randomized Block Design ◽  
Chemical Residues ◽  
The Impact ◽  
Increase Crop Yield

Lettuce (Lactuca sativa L.)is one of hleafy vegetables that have high economic value in Indonesia and it gives good benef its ton the con sumers.The us of organic fertilizers is expected to be more optimal in agriculture today, considering the impact that the use of inorganic fertilizers may damage the soil and increasing environmental pollution with chemical residues in the soil, which result in decreased land productivity. This study aimed  to determine the effect of Bioboost fertilizer to increase crop yield of lettuce. Treatment were arranged in a Randomized Block Design, with one factor namely the concentration of Bioboost fertilizer consisting of 7 treatments:  B0=0 cc (control), B1= 20 cc, B2= 40 cc, B3= 60 cc, B4= 80 cc, B5=100 cc  per liter of water, and B6 = 120 cc / liter of water, with 3 replications so that there were 21 experimental units. Each treatmental unit consisted of 8 plants so that overall there were 168 plant populations. These results indicated  that concentration of Bioboost bio-fertilizers gave a significant effects on the growth of lettuce. Fertilizer cencentration of 80 cc / liter of water (B4) was the best concentration for growth and increased yield of lettuce.

scholarly journals The effect of fertilizing soils degraded by the metallurgical industry on the content of elements in Lactuca sativa L.

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alicja Kicińska ◽  
Justyna Wikar
Keyword(s):  
Lactuca Sativa ◽  
Transfer Factor ◽  
Metal Accumulation ◽  
Organic Fertilizer ◽  
Metallurgical Industry ◽  
Cattle Manure ◽  
Lactuca Sativa L ◽  
Bioaccumulation Index ◽  
The Impact ◽  
Edible Parts

AbstractThe aim of the study was to determine the content of macroelements (Ca, K, P, S, Mg) and microelements (Fe, Cr, Ni, Mn, Zn, Pb, Zn, Ti) in the leaves of Lactuca sativa grown in soils contaminated by the mining and metallurgical industry. The plants were cultivated using four fertilization variants: (a) unfertilized soil, (b) mix of straight fertilizers, (c) multinutrient fertilizer and (d) organic fertilizer, namely granular cattle manure. The study also involved an analysis of metal accumulation degree in the edible parts of lettuce by means of calculating a bioaccumulation index—transfer factor (TF). The analysis of the impact of fertilization on the content of the elements in the edible parts of fertilized versus unfertilized lettuce demonstrated that phytoavailability of the metals was most effectively limited by the multinutrient fertilizer and the mix of straight fertilizers. The organic fertilizer proved to be the least effective. The highest TF values (> 0.1) were recorded for macroelements, which denotes their intense and moderate accumulation. Poor bioaccumulation was observed for Cr, Mn, Ni and Zn (0.01 ≤ TF < 0.1), whereas in the case of Fe, Pb and Ti—trace bioaccumulation or no bioaccumulation was found (TF ≤ 0.01).

scholarly journals Yield and Oil Content of Mint under Different Nitrogen Fertilizer Treatments

2018 ◽  
Vol 10 (1) ◽  
pp. 92-96
Author(s):  
Hamed KESHAVARZ ◽  
Seyed Ali Mohammad MODARRES SANAVY
Keyword(s):  
Essential Oil ◽  
Plant Height ◽  
Organic Fertilizer ◽  
Chemical Fertilizer ◽  
Organic Fertilizers ◽  
Oil Yield ◽  
Japanese Mint ◽  
Oil Percentage ◽  
Fertilizer Combination ◽  
Essential Oil Yield

Two species of mint Mentha piperitha (peppermint) and M. arvensis (Japanese mint) are widely cultivated in Iran, but their response to fertilizer regime has not been evaluated so far. A field experiment was conducted to investigate the effects of different organic and chemical fertilizer treatments [Control, 100% urea (95 kg N ha−1), 75% urea (71.25 kg N ha-1) + 25% vermicompost (3.3 t ha-1), 50% urea (47.5 kg N ha-1) + 50% vermicompost (6.75 t ha-1), 25% urea (23.75 kg N ha-1) + 75% vermicompost (10.1 t ha-1) and 100% vermicompost (13.5 ton ha-1)] on essential oil contents, yield and yield components of the two species of mint. Peppermint provided grater plant height, number of internodes, number of leaf and oil percentage compared with the Japanese mint under study. The results indicated that, irrespective of the mint species, plants treated with combined chemical and organic fertilizer presented taller plants, higher oil contents and oil yield compared with solo chemical or organic fertilizers. Oil percentage and essential oil yield of mint increased significantly under the treatment with 25% urea (23.75 kg N ha−1) + 75% vermicompost (10.1 t ha-1). Plant height and number of leaf increased along the replacement of organic fertilizer with chemical fertilizers. The results showed that there was a positive and significant correlation with leaf number and essential oil yield. Application of vermicompost in combination with chemical fertilizer increased plant height, oil percentage and essential oil in both species, suggesting that organic and chemical fertilizer combination improves performance and environmental sustainability.

scholarly journals PRODUÇÃO DE ALFACE SOB DIFERENTES NÍVEIS DE SALINIDADE DO SOLO

Irriga ◽  
2005 ◽  
Vol 10 (1) ◽  
pp. 20-29 ◽  
Author(s):  
Nildo Da Silva Dias ◽  
Sergio Nascimento Duarte ◽  
Roberto Takafumi Yoshinaga ◽  
José Francisco Teles Filho
Keyword(s):  
Soil Salinity ◽  
Lactuca Sativa ◽  
Soil Depth ◽  
Fertilizer Application ◽  
Retention Capacity ◽  
Lactuca Sativa L ◽  
Engineering Department ◽  
Lettuce Yield ◽  
The One ◽  
Different Levels

PRODUÇÃO DE ALFACE SOB DIFERENTES NÍVEIS DE SALINIDADE DO SOLO. Nildo da Silva Dias; Sergio Nascimento Duarte; Roberto Takafumi Yoshinaga; José Francisco Teles FilhoDepartamento de Engenharia Rural, Escola Superior de Agricultura ”Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, SP., CP 09, CEP 13418-900,  [email protected] 1 RESUMODevido à falta de conhecimento por parte dos nossos agricultores e técnicos a respeito do manejo adequado da fertirrigação, tem sido freqüente os problemas de salinização de solo, sobretudo em ambiente protegido. Desse modo, com o objetivo estudar os efeitos de diferentes níveis iniciais de salinidade do solo no crescimento e na produção de alface, foi desenvolvido um experimento em ambiente protegido no Departamento de Engenharia Rural da Escola Superior de Agricultura “Luiz de Queiroz”, município de Piracicaba, SP. Utilizaram-se amostras de 10 kg de solo de um Latossolo Vermelho, as quais foram peneiradas, secas ao ar e acondicionadas em vasos de 17 L, tendo em sua base perfurada uma camada de envelope de 2 cm (brita + geotextil), resultando em uma camada de solo de 20 cm. As amostras de solos foram salinizadas artificialmente por excesso de adubos utilizados na fertirrigação. A umidade do solo foi elevada até a máxima capacidade de retenção e, concomitantemente, foram adicionados os sais diluídos via água, obtendo-se 9 níveis diferentes de salinidade do solo (0,4; 1,0, 2,0; 3,0; 4,0; 5,0; 6,0; 7,0 e 8,0 dS m -1) com 5 repetições. As proporções e os tipos de sais aplicados no solo seguiram a recomendação de adubação para a cultura do alface. Determinou-se o limite máximo de salinidade (salinidade limiar) tolerado pela cultura, causada pelo excesso de fertilizantes e seus efeitos nas variáveis de produção comercial e nos componentes de produção. Concluiu-se que todas as variáveis analisadas foram influenciadas pelos níveis iniciais de salinidade, e que para a maioria delas, o nível limiar foi superior ao usualmente citado na literatura (1,3 dS m-1). UNITERMOS: condutividade elétrica, fertirrigação, Lactuca sativa L.  DIAS, N. S.; DUARTE, S. N.; YOSHINAGA, R. T.; TELES FILHO, J. F.LETTUCE YIELD UNDER DIFFERENT LEVELS OF SOIL SALINITY.                                                                                                                  2 ABSTRACT Due to the lack of knowledge of the appropriate fertirrigation management in greenhouses by our farmers and technicians, problems of soil salinity have been observed frequently. To evaluate lettuce yield and growth under different levels of soil salinity caused by excessive fertilizer application, a study under greenhouse conditions was carried out in the experimental field of the Rural Engineering Department of the “Escola Superior de Agricultura Luiz de Queiroz – USP”, Piracicaba, Brazil. 10-kg soil samples in Oxysol were used. They were sifted, dried in open air and conditioned in 17-L perforated base vases with a 2-cm envelope layer (gravel + synthetic fabric), resulting in a 20-cm soil depth. The soils samples were salinized artificially by excess of fertilizers used in fertirrigation. The soil moisture was elevated to the maximum retention capacity using water with diluted salts to obtain 9 different levels of soil salinity (0.4, 1.0, 2.0, 3.0,4.0, 5.0, 6.0, 7.0 and 8.0 dS m -1) with 5 repetitions. The proportions and types of salts applied in the soil followed the total nutrient extraction for the culture of lettuce (Lactuca sativa L.). The maximum tolerated salinity limit caused by fertilizer excess was determined and also its effects in commercial production and production components. The results showed that different levels of soil salinity influenced all analyzed variables and that for most of the variables the maximum limit was higher than the one used found in the literature (1,3 dS m-1). KEYWORDS: Electric conductivity, fertirrigation, Lactuca sativa L.

scholarly journals PENERAPAN PAKET TEKNOLOGI RAMAH LINGKUNGAN PADA BUDIDAYA SAYURAN BUAH GUNA MENGANTISIPASI DAMPAK ANOMALI IKLIM

2020 ◽  
Vol 6 (1) ◽  
pp. 158-165
Author(s):  
. Baharuddin ◽  
Muslim Salam ◽  
Mahmud Ahmad ◽  
A. Masniawati
Keyword(s):  
Organic Fertilizer ◽  
Economic Value ◽  
Fruit Tree ◽  
Plant Diseases ◽  
Organic Fertilizers ◽  
Total Production ◽  
Bitter Melon ◽  
Dry Land ◽  
The Impact ◽  
Environmental Anomalies

Climate anomaly is very influential for agriculture in our country. The patterns and methods of farming that have been adopted by farmers must be adapted to anticipate shifts in erratic seasons. Horticulture is a food that is quite essential for humans and has a high economic value if it is managed intensively. Characteristics of vegetables that are easily damaged and rotten cause the price to be very volatile so that it affects the farmer’s income. Uncertain rainy season affects the availability in market because vegetables are generally cultivated conventionally in open fields. A technology approach and smart agribusiness management are needed to reduce the impact of environmental anomalies so that they do not affect the quantity and quality of agricultural products. To reduce the impact of environmental anomalies, the application of synergistic and environmentally friendly technologies on fruit vegetables using a drip hydroponic system and mulch in the cultivation of eggplant in dry land, circulated NFT hydroponics in cultivation of cucumber and bitter melon plants. It also carried out the manufacture and use of liquid organic fertilizer to stimulate the growth and production of fruit vegetables and biopesticides to avoid pests and plant diseases. The results showed that eggplant cultivation planted in open land with drip irrigation resulted in 3.26 fruit / tree with a total production of 130,400 fruits/ha. If the price is IDR 2,000/fruit, then the turnover earned is IDR 260,800,000/ha. Cultivation of cucumber through hydroponic NFT yields 18.83 fruit/tree with a total production of 301,280 fruit/ha. If the price is IDR 1,000/fruit, then the turnover earned is IDR 300,426,000/ha. Cultivation of bitter melon through hydroponic NFT yields 23.76 fruits/tree with a total production of 308,880 fruits/ha. If the price is IDR 1,000/piece, then the turnover earned is IDR 308,880,000/ha.   Keywords: Hydroponics, organic fertilizers, biopesticide, fruit vegetables.   ABSTRAK Anomali iklim sangat berdampak bagi dunia pertanian di negara kita. Pola dan cara bercocok tanam yang selama ini telah dianut oleh petani harus diadaptasikan untuk mengantisipasi pergeseran musim yang tidak menentu. Produk hortikultura merupakan bahan pangan yang cukup esensial bagi manusia dan mempunyai nilai ekonomi yang cukup tinggi jika dikelola secara intensif. Karakteristik sayuran yang mudah rusak dan busuk menyebabkan harganya sangat fluktuatif sehingga berpengaruh pada pendapatan petani. Musim hujan yang tidak menentu berpengaruh terhadap ketersediaan di pasar karena sayuran pada umumnya dibudidayakan secara konvesional di lahan terbuka. Untuk mengurangi dampak anomali lingkungan, penerapan teknologi bersinergi dan ramah lingkungan pada sayuran buah dengan menggunakan sistem hidroponik tetes dan mulsa pada budidaya tanaman terung dilahan terbuka, hidroponik NFT tersirkulasi pada tanaman mentimun dan pare. Selain itu juga dilakukan pembuatan dan pemanfaatan pupuk organik cair untuk merangsang pertumbuhan dan produksi sayuran buah dan biopestisida untuk menghindari serangan hama dan penyakit tanaman. Hasil kegiatan menunjukan bahwa budidaya terung yang ditanam di lahan terbuka dengan pengairan tetes diperoleh hasil 3.26 buah/pohon dengan produksi total 130,400 buah/ha. Jika harga Rp. 2,000/buah, maka omzet yang diperoleh sebesar Rp. 260,800,000/ha. Budidaya tanaman terung melalui hidroponik NFT diperoleh hasil 18.83 buah/pohon dengan produksi total 301,280 buah/ha. Jika harga Rp. 1,000/buah, maka omzet yang diperoleh sebesar Rp. 300,426,000/ha. Budidaya tanaman pare melalui hidroponik NFT diperoleh hasil 23.76 buah/pohon dengan produksi total 308,880 buah/ha. Jika harga Rp. 1,000/buah, maka omzet yang diperoleh sebesar Rp. 308,880,000/ha.   Kata kunci: Hidroponik, pupuk organik, biopestisida, sayuran buah.

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