Foliar Application Of Boric Acid Research Articles

Applying Boron by Fertigation or as a Foliar Fertilizer Is More Effective than Soil Applications in Northern Highbush Blueberry

Boron (B) is often deficient in many fruit crops, including blueberry (Vaccinium sp.). The objective of the present study was to evaluate different methods for applying B fertilizers to two commercial cultivars of northern highbush blueberry (V. corymbosum Earliblue and Aurora) in western Oregon, USA. Treatments included soil application of sodium tetraborate in early April (before bloom), foliar application of boric acid in late April (during bloom or petal fall), weekly fertigation with boric acid from April through July, and a control with no B. The plants were irrigated by drip, and the fertilizers were applied for two consecutive seasons at a total rate of 1.5 kg·ha−1 B per year. Each method of fertilizer application increased the concentration of B in the soil solution relative to the control, but fertigation was the only treatment that increased extractable soil B to the recommended level of 0.5 to 1.0 mg·kg−1 B. In terms of plant nutrition, foliar application of B was the most effective method for increasing the concentration of B in the leaves, roots, and fruit, followed by fertigation. Soil application of B, on the other hand, was relatively ineffective and, after 2 years, only increased the concentration of B in the leaves of ‘Earliblue’. Although leaf B levels were initially deficient at the site (<30 ppm B), none of the B application methods had any effect on yield, berry weight, fruit firmness, or titratable acidity of the fruit in either cultivar. However, foliar applied B resulted in higher concentrations of soluble solids in the fruit than no B or soil applied B in ‘Earliblue’, whereas B fertigation resulted in higher concentrations of soluble solids than soil applied B in ‘Aurora’. On the basis of these results, applying B by fertigation or as a foliar spray is recommended over the use of soil applications of B fertilizer in northern highbush blueberry.

Response of Tomato (lycopersicum Esculentum L.) to Imbibing Seeds by Ga3, And Foliar Spraying by Boron And Α-tocopherol

This study was carried out from March to October 2021 at two different locations in Sulaimani governorate, the first location was the University of Sulaimani, College of Agricultural Engineering Sciences, and the second location located in Sulaimani, Sitak, Kani Naz, the study aimed to indicated the impact of gibberellic acid on seed germination of local tomato seeds, and evaluated the effect of foliar application of boric acid and alpha-Tocopherol  (α-Tocopherol ) on the vegetative growth and yield of tomato plants. The seeds were soaked in gibberellic acid at different concentrations (0 ppm, 50 ppm, and 100 ppm), and foliar spraying of boric acid at various levels (0 ppm, 15 ppm, and 30 ppm) started two weeks after transplanting. Also, another foliar applied was α-Tocopherol at different levels (0 ppm, 125 ppm, and 250 ppm) when the plants start to flowering. The results showed that gibberellic acid had a significant effect on the tomato seed germination. Additionally, the result about the interaction between all factors revealed that the interaction among (S1*B2 *E3) had a height significant (p≤0.05) role on the vegetative growth, plant height (135.000 cm), number of branches. Plant-1 (57.000), the highest content of boron in leaves when using (S2*B3*E1) (0.460 mg. kg-1), and the highest yield. Plant-1 when using (S3*B2*E1) (3.187 kg). Whereas, all of the factors with all different concentrations had no significant (p˃0.05) effect on leaf area surface in tomato plants

Effect of Soil and Foliar Application of Boron on Yield and Economics of Green Gram (Vigna radiata L.)

A field experiment entitled "Effect of soil and foliar application of boron on yield and economics of green gram" was carried out during Kharif 2019-20 at ZARS, UAS, GKVK, Bengaluru. The field experimental results revealed that significant (p < 0.05) variation in number of pods plant-1 (25.74), number of seeds pod-1 (14.48), test weight of 100 seeds (5.12 g), grain yield (10.19 q ha-1), haulm yield (2.17 t ha-1) and B:C ratio (1.96) were recorded in treatment T10 which received soil application of borax at 2.50 kg ha-1 + foliar application of boric acid at 0.1 % along with package of practice. The number of nodules plant-1 (20.12) was significantly (p < 0.05) highest in treatment T12 which received soil application of borax at 5.00 kg ha-1 + foliar application of boric acid at 0.1% along with RDF over absolute control (14.75). So, from this experiment treatment T10 which received soil application of borax at 2.50 kg ha-1 + foliar application of boric acid at 0.1% along with package of practice shows better results, Since, the present study result one year experiment; further long term and multi-locational trial must be done to confirm the finding.

Effect of foliar nutrition with calcium, boron, and potassium on amelioration of aril browning in pomegranate (Punica granatum cv. ‘Rabab’)

ABSTRACT Aril browning is a serious physiological disorder and major fruit quality anomaly in red-coloured pomegranates, under environmental stress such as temperature extremes. In this study, the single and combined effect of foliar nutrition with calcium, boron, and potassium on aril browning in ‘Rabab’ cultivar pomegranate (Punica granatumL.), were evaluated. Experimental factors were foliar nutrition with boric acid (0 and 2 gL−1), – calcium chelate (0 and 20 gL−1) and potassium chloride (0 and 20 gL−1). Results showed that the effect of foliar nutrition with potassium chloride, boric acid, and calcium chelate significantly reduced the browning index by 92.6%. Increment of fruit potassium content had a positive and significant correlation with fruit juice percentage (r = 0.96**), total soluble solids (r = 0.93**), and total acid (r = 0.83**), which had a significant and positive correlation with fruit juice total anthocyanin, phenolic and flavonoid content and negative correlation with the browning index. Foliar application of boric acid and calcium chelates a week before full bloom and four weeks after full bloom and their application along with potassium chloride before fruit ripening can be a new strategy to improve this complication. This recommended strategy could increase export profits by up to 75%.

Polyol-ester impact on boron foliar absorption and remobilization in cotton and coffee trees

ABSTRACT Foliar fertilization can be recommended to treat boron (B) deficiency in coffee and cotton. Considering that B foliar fertilizers with polyol-boron complexes can affect B uptake and mobility differently within the plant, and coffee and cotton have different cuticles and stomata density, a differential response would be expected. We aimed to study the foliar application of boric acid combined with sorbitol on B uptake and translocation in cotton and coffee. Green-house grown plants received B as boric acid and [...]

Effect of Boric acid, Potassium nitrate and Magnesium sulphate on Managing Fruit Cracking and Improving Fruit Yield and Quality of Pomegranate

Pomegranate is a drought tolerant fruit crop and is well adapted to sub-tropical and tropical climates. Fruit cracking is a major disorder in pomegranate which causes significant economic losses. In the present work, effect of foliar application of boric acid (0.05%), potassium nitrate (1.0%) and magnesium sulphate (1.0%) alone or in combinations was investigated to manage fruit cracking and improve fruit yield and quality of pomegranate cv. Golden. First treatment (foliar spray) was applied one month after fruit setting (April) and repeated twice during May and June each year. Application of foliar sprays affected fruit yield and quality positively. The maximum number of fruits per plant (254), average fruit weight (192 g), yield per plant (58.3 kg), number of arils per fruit (592), juice content (41.1%) as well as the minimum fruit cracking (3.9%) were recorded when 0.05% boric acid, 1% potassium nitrate and 1% magnesium sulphate were applied in combination. Fruit size and total soluble solids (TSS) of fruit juice were not affected by the applied treatments. Thus, combined application of boric acid, potassium nitrate and magnesium sulphate could be recommended for reducing fruit cracking and improving yield and quality of pomegranate fruits under semi-arid conditions of Southern Punjab, Pakistan.

Effects of Spacing, Humic Acid and Boron on Growth, Seed Production and Quality of Broad Bean (Vicia faba var major L)

Two field experiments were carried out in a private farm located at Bangar El Sokar region - Borg Al-Arab -Alexandria, Egypt, during winter growing season of 2014/2015 to study the effects of three spacing (10, 20 and 30 cm),three Humic acid (HA) rates (control, 1000 and 2000 mg l-1) and three boric acid rates (control, 2.5 and 5 mg l-1) on thevegetative growth, seed yield and its quality of broad bean plants.The results indicated that increasing spacing between broad bean plants lead to an increase in the numbers ofbranchesplant-1 and poor seeds percentage. While, plant height, seed yield fed-1 (ton) and good seeds percentage characterswere decreased by increasing spacing.Treated broad bean plants with humic acid increased plant height and the numbers of branches. However, usinghumic acid at rate 2000 mg l-1gave the highest mean value of fresh mass plant-1. While, increasing humic acid rate waslead to decrease the nods setting percentage. In addition to, application of 1000 mg l-1 of humic acid gave the highestmean value of the seed yield fed-1and good seed percentage, as well as the lowest percentage of poor seeds.The results showed that the highest mean values of plant height (cm) were obtained from treated plants with2.5 mg l-1 boric acid. Also, increasing boric acid rates up to 5 mg l-1 decreased the fresh mass of plant-1. Whereas, thehighest mean value of the earliness and nods setting percentage achieved by application 5 mg l-1 of boric acid. Increasingthe boric acid rates up to 5 mg l-1 was associated with increments in the average seed yield fed-1 and the good seedpercentage. In general, the highest dry seed yield fed-1, under conditions of Bangar El Sokar region - Borg Al-Arab –Alexandria, were achieved when sowing broad bean plants at 10 cm with the application of humic acid at rate 1000 mg l-1and foliar application of boric acid at rate 5 mg l-1.

Effect of foliar application of boric acid on fruit quality and yield traits of mango.

Imbalance uptake of boron disturbs the process of pollination that eventually decrease the flowering, fruit setting and yield. Its deficiency also deteriorates the quality of fruit by increasing fruit acidity. Therefore, source, balanced application, method of application and optimum uptake of B is an important aspect and need keen scientific attention. So, a field study was conducted with the hypothesis that foliar application of B would be an effective technique to improve the yield and quality of Mango cv. Summer Bahisht (SB) Chaunsa. The source of B was boric acid (BA) applied twice as foliar spray i.e., 0, 0.1, 0.2 and 0.3%. Results confirmed that as compared to control, a significant improvement in fruit weight at ripening and harvesting stages (36.9%), fruit length (21.9%), fruit width (10.1%), flower (22.1%) and fruit terminals m-2 (40.0%) confirmed the effectiveness of T4 (BA= 0.3%). A significant improvement in average yield (78.6%) validated the efficacious functioning of boric acid (0.3%). In conclusion, boric acid is an important and effective source of B to improve the quality and yield of Mango cv. SB Chaunsa. Similarly, BA (0.3%) is a better option than 0.2 and 0.1% BA to improve the quality and yield of mango.

Planting date , Variety , Boric acid , Cauliflower

This study was conducted at experiment Farm of Horticulture and landscape design Dep. / College of Agriculture and Forestry / Mosul University , during growing season 2010-2011 to investigate the effects of two planting dates : 4th of July and 3rd of August, and foliar application of Boric Acid (17.4% Boron) at rate 0 , 30 and 60 mg/ L in three times (the first was done after one and two months from transplanting and one week before beginning of curds formation ) on quantity and quality of curd yield in three cauliflower cultivars : White Cloud, Greta (Hybrid) and Siria (Hybrid). The result indicated that the three varieties tested did not differ significantly in the total plant weight (leaves and stem and curd) , mean of total curd weight and its yield/ha. , mean of marketable curd weight and its yield/ha. The first planting date (4/7) leads to a significantly increase in all above mentioned characters compared with plant planted in second planting date (3/8) and the increasing percentage reached to 98.88 , 104.07 and 74.9 % for the total plant weight , mean of total curd weight and its yield/ha. And mean of marketable curd weight and its yield per ha. Receptively. Boric acid treatment had no significant effect on all quantitative mentioned previously. The qualitative characters i.e. curd circumference, curd diameter, curd thickness did not differ significantly between the varieties ,the curd produced from the first planting date increased significantly in curd circumference ,curd diameter, curd thickness more than curd produced from the second planting date. Whereas , Boric acid application had no significant effect on the above mentioned qualitative characters of the produced curd.

Effects of foliar application of boron on mango

Foliar application of boric acid, at varying concentrations, to mango cultivar ‘Langra’ significantly influenced the growth, flowering, fruiting and fruit quality. Highest values for most of the characteristics were obtained in the treatment where 0.8% boric acid was used.