Potassium Fertigation to Enhance the Performance of Hypoxis hemerocallidea

Potassium (K) is an essential nutrient in plant metabolism, ionic balance, and stress resistance. In this study, the effects of K on agronomic attributes and on mineral and primary metabolite content in African potato were determined. K was administered hydroponically at four concentrations (4.00, 6.00, 8.00, and 10.00 meq·L−1) using Steiner’s universal nutrient solution. Chlorophyll content (CHL), leaf area (LA), fresh corm mass (FCM), number of roots (NR), root fresh weight (RFM), and root dry mass (RDM) were measured 18, 32, and 40 weeks after transplanting. Mineral analysis data were collected at 18 weeks, and primary metabolite data were collected at 32 weeks. Significant effects of K were observed after 18 weeks, and all test concentrations had a positive effect on yield. Calcium and boron significantly accumulated in the corm at 4.00 meq·L−1 K. Alanine and malic acid were the only metabolites affected by K concentrations. More minerals accumulated in the corm at 4.00 meq·L−1 K, whereas at 10.00 meq·L−1 K, more minerals clustered in the leaf. K applied at 4.00 meq·L−1 is recommended when growing African potato using a nutrient solution to improve corm mineral and metabolite accumulation.

Download Full-text

Growth and yield of lettuce plants under salinity

Horticultura Brasileira ◽

10.1590/s0102-05362005000400014 ◽

2005 ◽

Vol 23 (4) ◽

pp. 931-934 ◽

Cited By ~ 47

Author(s):

Jerônimo L. Andriolo ◽

Gean L. da Luz ◽

Maiquel H. Witter ◽

Rodrigo dos S. Godoi ◽

Gisele T. Barros ◽

...

Keyword(s):

Experimental Design ◽

Nutrient Solution ◽

Dry Mass ◽

Growth And Yield ◽

Fresh Weight ◽

Electrical Conductivities ◽

Salinity Levels ◽

Number Of Leaves ◽

Set Up ◽

Positive Effect

Lettuce plants, cv. Vera, were grown under five salinity levels in a hydroponical experimental set-up using a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the following composition, in mmol L-1: 16.9 NO3-; 2.0 H2PO4-; 1.0 SO4- 4.0 Ca++; 10.9 K+ e 1.0 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0,05 Cu; 0,50 B; 0,04 Mo, and 4.82 chelated Fe. The five salinity levels compared as treatments were obtained by varying the concentration of the standard nutrient solution, reaching average electrical conductivities (EC) of 0.80; 1.93; 2.81; 3.73 and 4.72 dS m-1, for T1, T2, T3, T4 and T5, respectively. The nutrient solution at each salinity level was supplied from a reservoir by means of a flooded-type electrical pump, for 15 minutes, at intervals of 90 minutes during the day and 420 minutes during the night. A completely randomised experimental design was used with four replications and 20 plants per plot. Four plants of each plot were harvested at 32 days after planting, to determine shoot and root dry mass, shoot fresh weight, leaf area and number of leaves per plant. Number of leaves was 18 per plant and was not affected by treatments. Dry mass of leaves increased 24,4% from T1 to T3. No relationships were found on data from stem and root dry mass. A positive effect of EC was recorded on shoot fresh mass, which increased 28.5% from T1 to T2, and decreased 16.5% from T2 to T5. Maximum LAI estimated value was 4.3 m² m-2 for an EC of 2.6 dS m-1. Salinity levels above 2.0 and 2.6 dS m-1 reduce fresh yield and plant growth, respectively.

Download Full-text

Influence of Planting Systems and Feeding Regimes on Dry Mass Accumulation of Cotton

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.39511 ◽

2021 ◽

Vol 9 (12) ◽

pp. 1196-1198

Author(s):

Jalilov Lutfiyor Sotvoldievich

Keyword(s):

Dry Mass ◽

Cattle Manure ◽

Root Activity ◽

Feeding Regimes ◽

Effect On Yield ◽

Positive Effect ◽

Mass Accumulation

Annotation: In order to increase the organic biomass in a bush, at least 15 t / ha of semi-rotted cattle manure before plowing, if possible plowed to 30 t / ha in autumn and then sowing in spring, retains the ability to absorb root activity longer, which has a positive effect on yield. reaches

Download Full-text

Character association and path coefficient analysis for identification of yield enhancing characters in snake gourd (Trichosanthes anguina L.)

Jahangirnagar University Journal of Biological Sciences ◽

10.3329/jujbs.v3i2.28286 ◽

2016 ◽

Vol 3 (2) ◽

pp. 57-65

Author(s):

S Islam ◽

R Hasan ◽

A Bashar ◽

MK Hossain ◽

AKM M Huque ◽

...

Keyword(s):

Correlation Coefficients ◽

Direct Selection ◽

Path Coefficient ◽

Path Coefficient Analysis ◽

Fresh Weight ◽

Fruit Length ◽

Selection For ◽

Effect On Yield ◽

Positive Direct ◽

Positive Effect

Correlations and path coefficient were studied in seven snake gourd genotypes namely Turag, Surma, Vorosa, Manghosito, Jhumlong, Green nitch and Monosha for yield and eleven yield contributing characters. The correlation coefficients were determined to find out the interrelationship among the characters studied. The correlation studies revealed that, yield/plant had positive and highly significant correlation both in phenotypic and genotypic level with fresh weight/fruit, fruit girth, fruits/plant, plant height and fruit length which indicated that yield could be increased by selecting these characters. Direct and indirect effects were measured using path coefficient analysis in order to obtain mechanisms of interrelationship between yield/plant and its components. The highest positive direct effect (0.9763) on yield/plant was found in fresh weight/fruit followed by fruits/plant (0.4179) and fruit length (0.2665). The characters showed direct positive effect on yield/plant indicated that direct selection for these traits might be effective for improving yield through selection in snake gourd.Jahangirnagar University J. Biol. Sci. 3(2): 57-65, 2014 (December)

Download Full-text

Effect of pre-harvest application of gibberellic acid on the contents of pigments in cut leaves of Asarum europaeum L.

Acta Agrobotanica ◽

10.5586/aa.2014.014 ◽

2014 ◽

Vol 67 (2) ◽

pp. 77-84

Author(s):

Elżbieta Pogroszewska ◽

Magdalena Joniec ◽

Katarzyna Rubinowska ◽

Agnieszka Najda

Keyword(s):

Gibberellic Acid ◽

Plant Material ◽

Foliar Application ◽

Dry Mass ◽

Plant Pigments ◽

Fresh Weight ◽

Cut Leaves ◽

Positive Effect ◽

Cultivation Site ◽

Asarum Europaeum

The experiment determined the effect of gibberellic acid applied prior to harvest on the contents of plant pigments in cut leaves of wild ginger (Asarum europaeum L.), cultivated in an unheated plastic tunnel and in the field. Foliar application of GA3 at a concentration of 100, 200, 400, 600 mg x dm-3 was repeated four times every two weeks. It has been proven that pre-harvest spraying of plants with gibberellic acid at a concentration of 100 mg x dm-3 has a positive effect on the content of photosynthetically active pigments in the leaves of A. europaeum cultivated in an unheated plastic tunnel. Application of GA3 at a concentration of 600 mg x dm-3 led to the accumulation of the greatest amount of anthocyanins in the leaves of Asarum europaeum cultivated both in the unheated plastic tunnel and in the field. The response of plants to GA3 application, expressed in the amount of flavonoids, depended on conditions related to the cultivation site. Pre-harvest treatment of A. europaeum plants with gibberellic acid at concentrations of 100-600 mg x dm-3 reduced the production of flavonoids in tunnel-grown wild ginger, but enhanced their accumulation in plants cultivated in the field. Pre-harvest application of gibberellic acid did not affect the fresh weight or dry mass content in plant material.

Download Full-text

Growth and development of lettuce plants at high NH4+:NO3- ratios in the nutrient solution

Horticultura Brasileira ◽

10.1590/s0102-05362006000300016 ◽

2006 ◽

Vol 24 (3) ◽

pp. 352-355 ◽

Cited By ~ 7

Author(s):

Jerônimo L Andriolo ◽

Rodrigo dos S Godoi ◽

Clarissa M Cogo ◽

Orcial C Bortolotto ◽

Gean L da Luz ◽

...

Keyword(s):

Experimental Design ◽

Nutrient Solution ◽

Growth And Development ◽

Crop Production ◽

Dry Mass ◽

Fresh Weight ◽

Total N ◽

Randomized Experimental Design ◽

Number Of Leaves ◽

Polynomial Models

Lettuce plants, cv. Vera, were grown at five NH4+:NO3- ratios in the nutrient solution in a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the composition of, in mmol L-1, 11.0 NO3-; 1.5 H2PO4-; 6.5 SO4--; 7.5 Ca++; 10.0 K+ and 1.5 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0.05 Cu; 0.50 B; 0.04 Mo, and 4.82 chelate Fe. Ammonium nitrate was used to supply NH4+ concentrations of 2.5; 5; 7.5 and 10 mmol L-1, reaching NH4+:NO3- ratios of 0:11 (T1); 2.5:13.5 (T2); 5:16 (T3); 7.5:18.5 (T4) and 10:21 mmol L-1 (T5) as treatments. A completely randomized experimental design was used, with four replications and 20 plants per plot. Four plants of each plot were harvested at 25 days after planting, to determine shoot and root dry mass, shoot fresh weight and number of leaves per plant. Number of leaves, shoot fresh and shoot and root dry mass decreased 25.5%; 52.5% and 68.5% from T1 to T5, respectively, following polynomial models. Root dry mass was 1.7 g/plant for T1 and T2, and 0.82 g/plant for T3, T4 and T5, decreasing in a proportion of 51.8%. For lettuce crop production in hydroponical facilities, the NH4+ threshold limit of about 9-12% of the total N should be retained.

Download Full-text

NITROGEN NUTRITION OF CITRUS NURSERY STOCK IN PINE BARK SUBSTRATES.

HortScience ◽

10.21273/hortsci.25.9.1161f ◽

1990 ◽

Vol 25 (9) ◽

pp. 1161f-1161

Author(s):

John D. Lea-Cox ◽

Irwin E. Smith

Keyword(s):

Nutrient Solution ◽

Nitrogen Nutrition ◽

Dry Mass ◽

Pine Bark ◽

Growing Period ◽

Rough Lemon ◽

Nursery Stock ◽

Citrus Rootstock ◽

Cleopatra Mandarin ◽

Nutrient Solutions

Pine bark is utilized as a substrate in citrus nurseries in South Africa. The Nitrogen (N) content of pine bark is inherently low, and due to the volubility of N, must be supplied on a continual basis to ensure optimum growth rates of young citrus nursery stock. Three citrus rootstock (rough lemon, carrizo citrange and cleopatra mandarin) showed no difference in stem diameter or total dry mass (TDM) when supplied N at concentrations between 25 and 200 mg ·l-1 N in the nutrient solution over a 12 month growing period. Free leaf arginine increased when N was supplied at 400 mg·l-1 N. The form of N affected the growth of rough lemon. High NH4-N:NO3-N (75:25) ratios decreased TDM when Sulfur (S) was absent from the nutrient solution, but not if S was present. Free arginine increased in leaves at high NH4-N (No S) ratios, but not at high NH4-N (S supplied) ratios. Free leaf arginine was correlated with free leaf ammonia. These results have important implications for reducing the concentration of N in nutrient solutions used in citrus nurseries and may indicate that higher NH4-N ratios can be used when adequate S is also supplied.

Download Full-text

Hydroponic Greenhouse Production of Fresh-market Basil in Colorado

HortScience ◽

10.21273/hortsci.33.3.480f ◽

1998 ◽

Vol 33 (3) ◽

pp. 480f-481

Author(s):

C. Elizabeth Succop ◽

Steven E. Newman

Keyword(s):

Nutrient Solution ◽

Root Zone ◽

Organic Fertilizer ◽

Fresh Weight ◽

Organic Solution ◽

Fresh Market ◽

Greenhouse Production ◽

Raised Bed ◽

Certified Organic ◽

Organic Produce

Fresh-market basil has become a viable greenhouse commodity in Colorado. Marketing pressures and profit advantages also encourage the production of certified organic produce. The research objectives were to determine the length of time basil plants were productive in the greenhouse and to compare the production of fresh-market basil grown with three root zone systems and two fertilizer treatments. The three systems were hydroponic rockwool slab culture, hydroponic perlite raised bed culture, and hydroponic peat/perlite/compost bag culture. The two types of hydroponic fertilizer treatments were a salt-based formulated nutrient solution and an organic solution consisting of fermented poultry compost, hydrolized fish emulsion, and soluble kelp. The plants were harvested once per week for fresh weight determination. The results from the two runs show greater productivity for the plants in the perlite system as well as the bag mix system when fertilized with the organic fertilizer compared to salt-based fertilizer. However, productivity of the plants in the rockwool system was greater with the salt-based treatment compared to the organic treatment.

Download Full-text

Kepuasan Pelanggan Dalam Berbelanja di Alfamidi Pagelaran Bogor

El-Mujtama: Jurnal Pengabdian Masyarakat ◽

10.47467/elmujtama.v1i2.413 ◽

2021 ◽

Vol 1 (2) ◽

pp. 85-104

Author(s):

Efrita Norman ◽

Zul Hiskandar ◽

Evinovita Evinovita

Keyword(s):

Quantitative Analysis ◽

Data Collection ◽

Customer Satisfaction ◽

Analysis Data ◽

Primary Data ◽

Sample Technique ◽

Saturated Sample ◽

Positive Effect

This study aims to analyze the effect of price and location on Alfamidi's customer satisfaction in Pagelaran Village, Bogor. The method used is descriptive and associative quantitative analysis, data collection used in this study using primary data sourced from questionnaires distributed to customers of Alfamidi Raya Ciomas who are in Pagelaran Village. Sampling using the saturated sample technique where the sample is consumers who have shopped at Alfamidi in the performance village. The sample used was 100 Alfamidi customer respondents in Pagelaran Village. Based on the results of the study showed that 1) price had a positive and significant effect on customer satisfaction, 2) location had a positive and significant impact on customer satisfaction, 3) price and location together had a positive effect on customer satisfaction. positive and significant impact on customer satisfaction in shopping for Alfamidi customers in Pagelaran Village.

Download Full-text

Agronomic evaluation of a tiller inhibition gene (tin) in wheat. I. Effect on yield, yield components, and grain protein

Australian Journal of Agricultural Research ◽

10.1071/ar04152 ◽

2005 ◽

Vol 56 (2) ◽

pp. 169 ◽

Cited By ~ 61

Author(s):

B. L. Duggan ◽

R. A. Richards ◽

A. F. van Herwaarden ◽

N. A. Fettell

Keyword(s):

Triticum Aestivum L ◽

Kernel Weight ◽

Grain Protein ◽

Terminal Drought ◽

Spike Number ◽

Effect On Yield ◽

Productive Tiller ◽

Wheat Lines ◽

Positive Effect ◽

Yield Penalty

Reduced tillering cereals have been proposed as being advantageous under terminal drought conditions through their reported reduction in non-productive tiller number and reduced soil water use prior to anthesis. This study was conducted to determine whether wheat (Triticum aestivum L.) lines containing the tiller inhibition (tin) gene have a yield penalty over their commercial near-isogenic counterparts. A terminal drought was experienced in all experiments. The effects of the tin gene were investigated in 4 different near-isogenic pairs of lines grown at 2 sowing densities at 4 locations in the eastern Australian wheatbelt over a 3-year period. Averaged over all experiments and lines, grain yield was unaffected by the presence of the tin gene. However, the highest yielding line contained the tin gene and its yield was 5% higher than all other lines. Averaged across the different genetic backgrounds, the tin gene decreased fertile spike number by 11%, increased the number of kernels/spike by 9%, and there was a 2% increase in kernel weight. The tin gene increased the harvest index by an average of 0.02, whereas above-ground biomass was reduced by 7%. Increasing sowing density from 50 to 100 kg/ha had little influence on yield or yield-related characteristics in both the restricted tillering and freely tillering lines. There was an interaction between sowing rate and the presence of the tin gene on yield, with tin lines yielding 0.2 t/ha more than the freely tillering lines at the higher sowing rate, whereas there was no effect at the lower sowing rate. The response of several lines containing the tin gene to nitrogen fertiliser was also investigated at 2 sites. Nitrogen increased spike number in all lines but the number remained around 20% less than in the freely tillering cultivars. The yield of wheat lines containing the tin gene was 6% greater than their near-isogenic pairs where nitrogen status was high in the presence of terminal drought. Grain protein concentration was unaffected by the presence of the tin gene at high grain protein sites, whereas at lower grain protein sites it had a positive effect.

Download Full-text

Split fertilization as a strategy to reduce the amount of fertilizer applied in potato crops form Colombia. Case of study

Revista Colombiana de Ciencias Hortícolas ◽

10.17584/rcch.2020v14i2.10523 ◽

2020 ◽

Vol 14 (2) ◽

pp. 240-248

Author(s):

Oscar Iván Monsalve ◽

Eduardo María Espitia ◽

Martha Marina Bolaños-Benavides

Keyword(s):

Soil Fertility ◽

Potato Plant ◽

Split Application ◽

Potato Plants ◽

Low Efficiency ◽

Effect On Yield ◽

Potato Crops ◽

Positive Effect

In potato crops in Colombia, fertilization has low efficiency in terms of absorption of nutrients by the plant due to fixing, leaching or volatilization processes. To counter this phenomenon, we evaluated the effect of the split application of fertilizers on potato plants and soil. Five treatments were evaluated: Control - fertilization used by farmers locally; As - fertilization recommended by the lab; AsSplit - monthly split of lab recommendation; AsSplit25 - monthly split of lab recommendation, reduced globally by 25%; AsSplit50 - monthly split of the lab recommendation, reduced globally by 50%. AsSplit treatment generated the highest yield (34.13 t ha-1), while treatments that reduced the amount of fertilizer by 25% and 50% obtained the lowest yield (30.94 and 29.57 t ha-1, respectively). However, they generated the lowest amount of NO3- in the leachate measurements at 30 and 90 cm deep. Our results suggest that designing the fertilization formula and applying it according to the requirements of the potato plant and soil fertility generates a positive effect on yield crop and environmental.

Download Full-text