Humic acid applications to lettuce do not improve yield but do improve phosphorus availability

Çimrin, Kerim Mesut; Yılmaz, İsmail

doi:10.1080/09064710510008559

Cited by 82 publications

(74 citation statements)

References 18 publications

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“…HA plays important roles on plants through stimulation of root growth and increase of water and nutrient uptake by vegetable crops (Cimrin & Yilmaz 2005). It can also influence the cell division (Chen et al 2004) and enhance protein synthesis (El-Ghamry et al 2009;Patil 2010), which result in enhancing total protein content in plants (Nardi et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Effect of Humic Acid on Growth and Productivity of Tomato Plants Under Heat Stress

Abdellatif

Abdel-Ati

Abdelmageed

et al. 2017

Journal of Horticultural Research

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The purpose of this study was to evaluate the effect of humic acid (HA) applied at 4.8, 9.6 and 14.4 kg·ha -1 on the growth and productivity of two tomato hybrids Nema 1400 and Platinium 5043 under hot continental climate. HA was applied twice to soil: the first one -three weeks from transplanting and the second one, after one week from the first application, in both seasons. Application of HA during the summer season targeted a great results on tomato plant growth and productivity. HA at 14.4 kg·ha -1 increased the vegetative growth of tomatoes (plant height and fresh weight) and flowering parameters (number of flower clusters and flowers per plant) as well as yield characters (fruit number per plant and fruit weight, which resulted in higher early and total yield) in both seasons. HA application had the least impact on fruit number per plant, and on vitamin C and total soluble solids (TSS) concentration as compared with control.

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Section: Discussionmentioning

confidence: 99%

Effect of Humic Acid on Growth and Productivity of Tomato Plants Under Heat Stress

Abdellatif

Abdel-Ati

Abdelmageed

et al. 2017

Journal of Horticultural Research

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“…HA increase growth and yields of various vegetable crops (Hayes & Wilson, 1997;Atiyeh et al, 2002;Zandonadi et al, 2007). Studies show that humic acid was in general not only beneficial to shoot and root growth, but also nutrient uptake of vegetable crops (Padem et al, 1997;Akinremi et al, 2000;Dursun et al, 2002;Cimrin & Yilmaz, 2005). Foliar spray of HA has promoted growth in a number of plant species (Brownell et al, 1987), as a result of increasing cell membrane permeability, respiration, photosynthesis, oxygen and phosphorus uptake, and supplying root cell growth (Cacco & Dell Agnolla, 1984;Russo & Berlyn, 1990).…”

Section: Introductionmentioning

confidence: 99%

Effect of N Fertigation Rates and Humic Acid on The Productivity of Crisphead Lettuce (Lactuca sativa L.) Grown in Sandy Soil

Mirdad¹

2016

JAS

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Lettuce is a slow-growing plant, which often accumulates 70:80% of it is head biomass and N uptake just during the last three to five weeks before the harvest. As well, add humic acid (HA) with N fertilizers is helping reduce the loss of N via leaching, especially in sandy soil. Therefore, the doses of N fertilizer and HA preferably add them in harmony with the requirements of different lettuce growth stages. This investigation aimed to study effect of three N fertigation rates; 50, 100 and 150 kg ha -1 and four rates of humic acid (HA); control, 400, 800 and 1600 mg l -1 as well as their interaction on the growth, head characters and mineral uptake (N, P and K) of crisphead lettuce. The results showed that lettuce plants receiving N fertigation rate up to 150 kg ha -1 were achieved the highest fresh and dry weight of outer leaves and head as well as total yield ha -1 . Furthermore, the total chlorophyll content, T.S.S. and mineral uptake were improved with increase N fertigation rate up to 150 kg ha ), fresh and dry weight of outer leaves and head and N, P and K uptake as well as chlorophyll content and T.S.S. Whereas, the ratio of outer leaves: head as the dry weight base was a significant increase with an increase in HA rate up to 1600 mg l -1 . Generally, the results showed that lettuce plants receiving N fertigation up rate 150 kg ha -1 + 800 mg l -1 HA achieved the highest mean values of fresh and dry weight of outer leaves and head as well as total yield ha -1 and chlorophyll content of crisphead lettuce plants.

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“…It enters into complex reactions with a variety of organic and inorganic components of soils and influences plant growth and plant production. The humic substances in the soil have both direct and indirect effects that can greatly benefit plant growth (Chen and Aviad 1990;Lobartini, Orioli, and Tan 1997;Tan 1998;Nardi et al 2002;Çimrin and Yılmaz 2005;Sangeetha, Singaram, and Devi 2006). Indirect effects involve improvements of soil properties such as aggregation, aeration, permeability, water-holding capacity, solubilization, and availability of microelements (e.g., Fe, Zn and Mn) and some macroelements [e.g., potassium (K), calcium (Ca), and phosphorus (P)] (Chen and Aviad 1990;Tan 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Foliar-Applied Humic Acid to Dry Weight and Mineral Nutrient Uptake of Maize under Calcareous Soil Conditions

Çelik

Katkat

Aşik

et al. 2010

Communications in Soil Science and Plant Analysis

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Greenhouse research was conducted to determine the effects of foliar application of humic acid on dry matter and some nutrient element uptake of maize grown under calcareous soil conditions. Agricultural lime was used to obtain five calcium carbonate (CaCO 3 ) doses (0, 5, 10 20, and 40%) and three foliar application doses of humic acid (0, 0.1, and 0.2%) sprayed at 20 and 35 days after emergence. Although the dry weight and mineral element uptake of maize were affected negatively, especially at 20 and 40% of lime levels, foliar application of humic acid had a statistically significant positive effect on dry weight and copper (Cu), zinc (Zn), and manganese (Mn) uptakes (P < 0.01) of maize plants. The greatest dry weight and Cu and sodium (Na) uptakes were obtained from the 0.01% humic acid treatment. The interaction of lime and humic acid was also statistically significant on dry weight, nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), Cu, Zn, and Mn uptake (P < 0.01).

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Humic acid applications to lettuce do not improve yield but do improve phosphorus availability

Cited by 82 publications

References 18 publications

Effect of Humic Acid on Growth and Productivity of Tomato Plants Under Heat Stress

Effect of Humic Acid on Growth and Productivity of Tomato Plants Under Heat Stress

Effect of N Fertigation Rates and Humic Acid on The Productivity of Crisphead Lettuce (Lactuca sativa L.) Grown in Sandy Soil

Effect of Foliar-Applied Humic Acid to Dry Weight and Mineral Nutrient Uptake of Maize under Calcareous Soil Conditions

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