Ecological and economical aspects of winter wheat (Triticum aestivum L.) growing on sod-podzolic soil depending on fertilization and amelioration

Assessment of the state and changes forecast of balances of humus and nutrients under the influence of anthropogenic factors, in particular fertilizers which are the criteria for environmental monitoring is given in the article. At the same time, the introduction of an environmentally friendly fertilizer system should ensure the economic efficiency of growing crops on a par with the preservation of soil fertility. The aim was to study the influence of the system of winter wheat fertilization on the balance of humus and nutrient elements on sod-podzolic soil and to establish the economic efficiency in research’s variants. The fertilizer system includes variants with amelioration a 1,0 dose of dolomite flour by the hydrolytic acidity (Hh), mineral fertilizers N120Р60K90 with addition of sulfur S40 and microfertilizer Nutrivant Plus Cereals (2 kg/ha) in foliar application. Methods of research were field trials, calculation, comparative and statistical analysis. Research’s results. Ploughing of plants by-products of back into soil is a source of organic carbon and nutrients. The yield of winter wheat straw in the variants changed from 2.04 to 4.47 t/ha. The largest amount of root (1.27 t/ha) and surface (1.47 t/ha) residues were provided by application 1.0 dose CaMg(CO3)2 and N120Р60K90 with the addition of S40 and microfertilizer Nutrivant Plus Cereals. The above fertilizer system provided a positive humus balance of 1.39 t/ha. The difference of data in variants with and without straw showed that due to straw ploughing in the soil accumulated up to 27–31% of the relative values of the newly formed humus. Optimization of the nutrition conditions due to fertilizers and liming caused an increase uptake of nutrients by culture, which together with unproductive losses led to a decrease of elements balance. At the same time, an increase the elements removal occurred at indicators of the intensity of NPK balance above 100%. This allowed us to conclude that the winter wheat fertilization of N120Р60K90 with the addition S40 and microfertilizer in combination with 1Hh dose of dolomite flour provides extension of sod-podzolic soil fertility along with increasing economic profitability of wheat cultivation. In this case, the grain yield of 3.85 t/ha contributed to the highest (1.52 UAH/ha) payback of fertilizer and liming.

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Application of natural and synthetic polyamines as growth regulators to improve the freezing tolerance of winter wheat (Triticum aestivum L.)

Acta Agronomica Hungarica ◽

10.1556/aagr.60.2012.1.1 ◽

2012 ◽

Vol 60 (1) ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

D. Todorova ◽

I. Sergiev ◽

V. Alexieva

Keyword(s):

Winter Wheat ◽

Foliar Application ◽

Normal Growth ◽

Triticum Aestivum L ◽

Growth Conditions ◽

Freezing Stress ◽

Preliminary Treatment ◽

Fresh Weight ◽

Soil Culture ◽

Weight Losses

Wheat cultivars were grown as soil culture under normal growth conditions. Twoweek- old seedlings were exposed to 4°C for 6 h and then transferred to −12°C for 24 h in the dark. Twenty-four hours before freezing stress, some of the plants were sprayed with aqueous solutions of spermine, spermidine, putrescine, 1,3-diaminopropane (1,3-DAP) and diethylenetriamine (DETA). The data showed that freezing stress caused a decrease in the fresh weight, chlorophyll content and plant survival rate, accompanied by a simultaneous accumulation of free proline and the enhanced leakage of electrolytes. Preliminary treatment with polyamines caused a decline in electrolyte leakage and a considerable augmentation in proline quantity, indicating that the compounds are capable of preventing frost injury. Additionally, the foliar application of polyamines retarded the destruction of chlorophyll, and lessened fresh weight losses due to freezing stress. The synthetic triamine DETA was the most effective, having the most pronounced action in all the experiments, followed by the tetraamine spermine. The application of polyamines to wheat crops could be a promising approach for improving plant growth under unfavourable growth conditions, including freezing temperatures. The results demonstrate that treatment with polyamines could protect winter wheat by reducing the stress injuries caused by subzero temperatures.

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The Influence of Tillage Systems, Fertilizers and Plant Protection on Biological Indicators of Fertility of Soddy Podzolic Gleyic Soil

Vestnik APK Verhnevolzh`ia ◽

10.35694/yarcx.2020.50.2.002 ◽

2020 ◽

Author(s):

Е.В. Чебыкина

Keyword(s):

Soil Fertility ◽

Plant Protection ◽

Close Correlation ◽

Biological Indicators ◽

Chicken Manure ◽

Mineral Fertilizers ◽

Tillage Systems ◽

Tillage System ◽

Fertilizer System ◽

Spring Rape

Представлены результаты исследований агроэкологической оценки разных систем обработки и видов удобрений при выращивании ярового рапса в условиях агроландшафта с дерново-подзолистыми глееватыми почвами. При проведении полевых и лабораторных опытов в 2019 году изучалось последействие заделки органо-минерального субстрата (был внесён в почву в 2017 г.), состоящего из обеззараженного куриного помёта и отработанных вегетационных матов, на биологические показатели плодородия почвы. В ходе исследований было установлено, что заделка органо-минерального субстрата способствует поддержанию почвенного плодородия. Так, содержание органического вещества увеличилось на 10,8% при отвальной системе обработки и на 7,8% – при поверхностной, по сравнению с контролем без удобрений. Существенного влияния изучаемых систем обработки почвы и удобрений на активность почвенного фермента каталаза и целлюлозразлагающих микроорганизмов обнаружено не было. Активность каталазы в большей степени определялась системой удобрений, их последействие проявилось в тенденции к снижению ферментативной активности. Урожайность ярового рапса зависела от биологических показателей плодородия почвы, в ходе корреляционно-регрессионного анализа были выявлены средние по тесноте взаимосвязи, в частности с активностью целлюлозоразлагающих микроорганизмов (r = –0,5693) и фермента каталаза (r = 0,5457). Между изучаемыми биологическими показателями плодородия почвы не обнаружено тесных корреляционных связей. К существенному снижению урожайности ярового рапса (на 13,4%) приводило проведение поверхностной системы обработки почвы в сравнении с отвальной. Применение органо-минерального субстрата самостоятельно и особенно в сочетании с минеральными удобрениями обеспечивало достоверную прибавку урожая зелёной массы ярового рапса. The results of researches of the agroecological assessment of different tillage systems and types of fertilizers when growing spring rape in conditions of cultivated land with soddy podzolic gleyic soils are presented. When conducting field and laboratory experiments in 2019, the afteraction of covering of the organo-mineral substrate (it was introduced into the soil in 2017), consisting of disinfected chicken manure and worked vegetation mats on biological indicators of soil fertility was studied. As part of study it was found that covering of the organo-mineral substrate contributes to maintaining soil fertility. Thus, the content of organic matter increased by 10.8% with the moldboard tillage and by 7.8% with the surface one compared with the control without fertilizers. No significant effect of the tillage systems and fertilizers under study on the activity of the soil enzyme catalase and cellulose decomposing microorganisms was found. Catalase activity was largely determined by the fertilizer system, their aftereffect was manifested in a tendency to a decrease in enzymatic activity. The yield of spring rape depended on the biological indicators of soil fertility, during the correlation and regression analysis medium-sized relationships were found, in particular, with the activity of cellulose decomposing microorganisms (r = –0.5693) and the enzyme catalase (r = 0.5457). Close correlation was not found between the studied biological indicators of soil fertility. A significant decrease in the yield of spring rape (by 13.4%) was caused by a surface tillage system in comparison with the moldboard one. The use of organic-mineral substrate independently and especially in combination with mineral fertilizers provided a reliable increase in the yield of green mass of spring rape.

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Winter Wheat Grain Quality, Zinc and Iron Concentration Affected by a Combined Foliar Spray of Zinc and Iron Fertilizers

Agronomy ◽

10.3390/agronomy9050250 ◽

2019 ◽

Vol 9 (5) ◽

pp. 250 ◽

Cited By ~ 18

Author(s):

Etienne Niyigaba ◽

Angelique Twizerimana ◽

Innocent Mugenzi ◽

Wansim Aboubakar Ngnadong ◽

Yu Ping Ye ◽

...

Keyword(s):

Winter Wheat ◽

Foliar Application ◽

Iron Concentration ◽

Foliar Spray ◽

Triticum Aestivum L ◽

First Year ◽

Zn Concentration ◽

Yield Quality ◽

Second Year

Wheat (Triticum aestivum L.) is one of the main foods globally. Nutrition problems associated with Zinc and Iron deficiency affect more than two billion individuals. Biofortification is a strategy believed to be sustainable, economical and easily implemented. This study evaluated the effect of combined Zn and Fe applied as foliar fertilizer to winter wheat on grain yield, quality, Zn and Fe concentration in the grains. Results showed that treatments containing high Fe increased the yield. Grain crude fat content remained unaffected. Crude fiber was enhanced up to three-fold by 60% Zn + 40% Fe5.5 (5.5 kg ha−1 of 60% Zn + 40% Fe). Moreover, 80% Zn + 20% Fe5.5 (5.5 kg ha−1 of 80% Zn + 20% Fe) was the best combination for increasing crude protein. Zinc applied alone enhanced Zn concentration in grain. In addition, Fe was slightly improved by an application of Zn and Fe in the first year, but a greater increase was observed in the second year, where 100% Fe13 (13 kg ha−1 of 100% Fe) was the best in improving Fe in grain. Foliar application of Zn and Fe is a practical approach to increase Zn and Fe concentration, and to improve the quality of wheat grains.

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Correlations between grain yield and related traits in winter wheat under multi-environmental traits

Agricultural Science and Technology ◽

10.15547/ast.2020.04.047 ◽

2020 ◽

Vol 12 (4) ◽

pp. 295-300

Author(s):

N. Tsenov ◽

T. Gubatov ◽

I. Yanchev

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Multiple Correspondence Analysis ◽

Triticum Aestivum L ◽

Field Trials ◽

Genotype By Environment Interaction ◽

Environment Interaction ◽

Wheat Grain ◽

Genotype By Environment ◽

Grain Number Per Spike

Abstract. In a series of field trials, a database of quantitative traits associated with winter wheat grain yield has been collected. The aim of the present study is to determine the relationships between the winter wheat (Triticum aestivum L.) traits of productivity in environments causing the maximum possible variation of each of the traits. In order to determine the correlations between the quantitative characters studied, all possible statistical methods have been applied (regression analysis, PCA, Multiple Correspondence analysis), which complement each other. It was found that the nature of the correlations between traits depends to a large extent on the methods for their evaluation. There are high and significant correlations between grain yields and the grain number per spike (weight of grain per spike and number of grains per m2) even under strong genotype by environment interaction of all the traits in trails. The established results are related to possible options for increasing winter wheat grain yield by breeding.

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Efficiency of forms and terms of zinc application in the winter wheat fields

Agrobìologìâ ◽

10.33245/2310-9270-2018-142-2-25-33 ◽

2018 ◽

pp. 25-33

Author(s):

A. Kryvenko ◽

S. Burykina

Keyword(s):

Winter Wheat ◽

Zinc Sulfate ◽

Foliar Application ◽

Statistical Processing ◽

Standard Technique ◽

Mineral Fertilizers ◽

Hydrothermal Conditions ◽

Yield Increase ◽

Time Treatment ◽

Zinc Application

To improve the technology of winter wheat cultivation it becomes more relevant to discuss the issue of enhancing crop microelement nutrition, which is very important when mineral fertilizers are applied at a higher rate than the one accepted in the zone. Chornozem (black) soils in general, and southern ones in particular, have a neutral or slight alkaline response, i.e. most of the microelements are slow movable and in fact are not available for the plants. The efficiency of the microelement application uppermost affected by the form they are in. Recent experiments prove that the most efficient form of microelement transportation to the plants is complex compounds of metals with organic ligands – chelates. The most common chelators are organic acids with carboxyl groups: ethylendiamintetraacetic (EDTA), diethylentryaminpentaacetic (DTPA), dihydroxybutylendiamintetraacetic (DBTA), ethylendiamindisuccinic (EDDA); phosphonic acids – oxyethylendendiphosphonic (OEDF) and nitryltrymethylenphosphonic (NTF). The research aims to study the effect of forms and ways of zinc application on the yield formation and grain quality of soft winter wheat on the southern chornozems (black soils). The experiments were carried out on southern chornozems, low-humus heavy loamy well-cultivated. The size of a sown plot is 120 m2, that of a record one is 50 m2, replication is fourfold. Fertilizers were applied in a form of ammonium nitrate, granulated superphosphate and potassium salt, and also superphosphate with zinc complexonate (0.75 %). Vegetative winter wheat fields were treated with the solutions of zinc salts with help of a manual sprayer. An experiment scheme was given when the results were presented. Black fallow was the predecessor of winter wheat, cv. Knopa. The efficiency of microelement was studied when it was applied in the form of zinc sulfate, chelate form, where oxyethylendendiphosphonic (OEDF) oxyethylendendiphosphonic (OEDF), superphosphate with zinc chelate on OEDF basis were used as ligand (0.75 %) Monitoring and analyzing were done according to the conventional methods in compliance with a standard technique. Statistical processing of the received results was done using a package of applied software Excel and Statistika, the methods of dispersive, correlative and regressive analyses. When N90P60K40, which contained superphosphate modified with zinc complexonate based on OEDF, was applied, the yield increase was 20.2 % as compared with the variant without fertilizers, including 6.4 % – due to zinc. It is advisable to apply zinc in the form of its complexonate with OEDF, the yield increase is 0.15 cwt/ha, as compared with zinc sulfate, and a share of the effect of this factor is 14.0 %. The application of zinc complexonate under pre-sowing cultivation at a rate of 2.0 kg/ha had no benefit over one-time treatment of the plants at the phase of tillering at a rate 250 g/ha, but doing this treatment at a phase of shooting resulted in a serious yield increase (0.20 t/ha at SSD 0.95 = 0.18). Foliar application with the solution of zinc complexonate (250 g/ha) increases the grain yield of winter wheat with the highest effect from a two-time treatment at tillering and shooting phases; the increase ranges from 0.20 to 0.54 t/ha. The efficiency of Zn application by 75.7-96.0% in arid conditions of the south of Ukraine is defined by hydrothermal conditions of spring vegetation, and a microelement helps winter wheat plants develop resistance to a temperature stress. A grain zinc concentration in the experimental variants ranged from 18.4 to 22.1 mg/kg (in the control it was 14.5 mg/kg). Key words: zinc, winter wheat, vegetation phases, quality, southern chornozem.

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Вплив попередників, обробітку ґрунту та добрив на урожай і якість зерна кукурудзи в умовах Луганської області

Вісник Полтавської державної аграрної академії ◽

10.31210/visnyk2018.04.02 ◽

2018 ◽

pp. 18-23 ◽

Cited By ~ 1

Author(s):

С. В. Маслійов ◽

Н. Ю. Мацай ◽

Н. А. Циганкова ◽

М. А. Сахно

Keyword(s):

Sugar Beet ◽

Winter Wheat ◽

Soil Fertility ◽

Mineral Fertilizers ◽

Soil Cultivation ◽

Field Crops ◽

Sanitary Condition ◽

National University ◽

Grain Products

Урожай більшості польових культур, в тому числі і кукурудзи, залежить від тих умов, які створюються попередніми культурами сівозміни. Розміщення кукурудзи після гарних попередників не лише підвищує урожайність, але і покращує родючість ґрунтів. Встановлено, що добрива та обробіток ґрунту сприяють підвищенню урожайності кукурудзи. В умовах дефіциту та дорожнечі мінеральних добрив залишається маловивченим питання заміни їх органічними, які сприяють покращенню екологічного та фітосанітарного стану як ґрунту, так і посівів кукурудзи, забезпечують отримання кращого за якістю та дешевого зерна. У зв'язку з цим, встановлення значення озимої пшениці, ячменю, кукурудзи на зерно і цукрових буряків як основних попередників кукурудзи, вирощуваної на різних фонах удобрення та основного обробітку ґрунту, в підвищенні її урожайності набуває особливої актуальності. Досліди проводилися на дослідних ділянках Луганського національного університету ім. Тараса Шевченка в 2016–2018 роках. Враховуючи важливість проблеми, авторами вказана перспектива на базі комплексних досліджень виявити вплив стерньових та просапних попередників у випадку різних фонів удобрення і обробітку ґрунту на елементи його родючості, фітосанітарний стан та продуктивність посівів кукурудзи в умовах біологізації землеробства. The harvest of most field crops, including corn, depends on those conditions which are pre-crops in the rotation. The location of the corn after a good predecessors not only increases the yield, but also improves soil fertility. It has been established that fertilizers and soil cultivation help to increase the yield of corn. In the conditions of deficit and high cost of mineral fertilizers, the issue of their replacement by organic, which helps to improve the ecological and phytosanitary state of both soil and corn, remains weak, providing quality and cheap grain products. In this regard, the determination of the value of winter wheat, barley, maize for grain and sugar beet, as the main predessors of maize, grown on different backgrounds of fertilizer and basic cultivation of soil, in increasing its yield is of a particular relevance. Experiments were conducted on experimental areas of Luhansk Taras Shevchenko National University in 2016–2018. Taking into account the importance of the problem, the authors pointed out the prospect on the basis of complex studies to determine the effect of stems and propagation predessors at different backgrounds of fertilization and soil cultivation on elements of its fertility, phyto-sanitary condition and productivity of corn crops in the conditions of agriculture biologization.

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The effect of mineral and organomineral fertilizers on the yield of winter wheat on the southern black soil in the condi-tions of the Lower Don

АгроЭкоИнфо ◽

10.51419/20216620 ◽

2021 ◽

Vol 6 (48) ◽

pp. 20-20

Author(s):

Artem Ermilov ◽

◽

Roman Kamenev ◽

Vladimir Turchin ◽

Vera Kamenevа

Keyword(s):

Winter Wheat ◽

Ammonium Nitrate ◽

Seed Treatment ◽

Field Experiments ◽

Flag Leaf ◽

Wheat Variety ◽

Mineral Fertilizer ◽

Black Soil ◽

Mineral Fertilizers ◽

Fertilizer System

Field experiments were conducted in 2017-2020 on the southern black soil in the conditions of the Lower Don. The Doneko winter wheat variety was sown. The predecessor of wheat is corn for grain. Mineral fertilizers were represented by ammonium nitrate (34.4%), nitroammophosk (16-16-16) and carbamide (46%), which acted as a background option in the scheme of the ex-periment. Organomineral fertilizers were preceded by the following agrochemicals: Ruther, Leyli 2000, Alga 1000/Turbo, Siamino Pro, Gumiful Pro, Soft Garden (Master Green Mix) and Double Vine (Monocaliphosphate). In the experiment, options for the joint use of non-root application and pre-sowing seed treatment with organomineral fertilizers were also studied. It was found that the use of organomineral fertilizers Ruther (0.5 or 0.25 l/ton) and Leyli (0.25 l/ton) for seed treatment before sowing, the use of Soft Guard (0.2 l/ha) and Humiful Pro (0.2 l/ha) in spring tillering and in the flag leaf phase against the background of a starter treatment mineral fertilizer in the form of azofoska at a dose of N32P32K32, fertilizing on frozen-thawed soil with ammonium nitrate at a dose of N40 and non-root topdressing with carbamide in the phase, earing at a dose of N20 increased the increase in grain yield on average for 3 years compared to the control variant (farm fertilizer system) by 0.73 t/ha or by 23.0%. The greatest increase in yield from the Router root-forming agent used for seed treatment was 0.36 t/ha or 11.3%. Keywords: WINTER WHEAT, MINERAL FERTILIZERS, ORGANOMINERAL FERTILIZERS, YIELD

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Changes in agrochemical parameters of leached chernozem under the influence of differentiated use of minerals

Agricultural science Euro-North-East ◽

10.30766/2072-9081.2019.20.2.144-152 ◽

2019 ◽

Vol 20 (2) ◽

pp. 144-152

Author(s):

A. A. Artemjev ◽

A. M. Guryanov

Keyword(s):

Winter Wheat ◽

Soil Fertility ◽

Crop Rotation ◽

Spring Wheat ◽

Soil Acidity ◽

Mobile Elements ◽

Mineral Fertilizers ◽

Forest Steppe ◽

Leached Chernozem ◽

The Impact

The article presents the results of studies conducted in 2004-2010 at the experimental plot in the forest-steppe Volga region. The research investigated the impact of traditional (average) and differentiated use of mineral fertilizers in the field crop rotation (winter wheat (reconnaissance sowing) – spring wheat ‒ annual grass – spring barley – bare fallow– winter wheat – spring wheat) on the change of agrochemical properties of leached chernozem. It was established that the six-year use of fertilizers contributed to the improvement of the main indicators of top soil fertility regardless of application technology. On average, in 15 sectors (plots) of each variant, the content of mobile phosphorus per rotation of crop rotation increased with differentiated fertilization by 15.9%, potassium – by 15%, and in the traditional one – by 4.8 and 16.7% respectively, (control of 100.8 and 116.2 mg/kg of soil, respectively). In sectors where no fertilizer was applied, the content of mobile elements decreased by 2-7%. The nitrogen content in the soil directly depended on the timing of sampling and the amount of moisture in the soil, so it was difficult to track its change. The difference in the accumulation of mineral nitrogen between the technologies of fertilizer application was not observed. For organic matter in all variants of the experience over the years of research there was a decrease in the indicator. This was more noticeable in the control, where the value decreased by 2.7%. Here, the value of soil acidity increased by 0.12 units and became 4.7. In variants with fertilizers soil acidity remained the same (4.6-4.7). In general, the differentiated use of mineral fertilizers did not have a negative influence on the agrochemical composition of leached chernozem. There was a gradual equalization of soil fertility due to the residual amounts of phosphorus and potassium on low-fertile plots and some reduction of mobile elements in zones with high content.

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Winter wheat varieties productivity of on elements of growing technology under the conditions of Southern Step of Ukraine

Agrobìologìâ ◽

10.33245/2310-9270-2020-157-1-96-103 ◽

2020 ◽

pp. 96-103

Author(s):

O. Markovska ◽

T. Hrechyshkina

Keyword(s):

Winter Wheat ◽

Plant Protection ◽

Mineral Fertilizer ◽

Climatic Conditions ◽

State Enterprise ◽

Irrigated Agriculture ◽

Mineral Fertilizers ◽

Wheat Varieties ◽

Organic Mineral ◽

Fertilizer System

Agrarian science has faced the problem of is the humanity provision with food, the major part of which is provided by grain crops. Winter wheat the most fully uses the existing bioclimatic potential of the Ukrainian regions. The highest productivity of this crop can be obtained with the use of modern adapted varieties with high genetic potential of productivity taking into account the soil-climatic conditions of the zone, improvement and development of highly effi cient, scientifi cally grounded systems of nutrition and plants protection against harmful organisms. The article presents the results of the research conducted in 2017–2019 on dark brown medium-loam low-saline soils under the conditions of the experimental fi eld of State Enterprise Experimental Farm “Kopani” of the Institute of Irrigated Agriculture of NAAS of Bilozersky district of Kherson region. The infl uence of varietal characteristics, mineral and organic-mineral fertilizer system, biological and chemical methods of disease protection on the productivity of winter wheat plants was investigated. The fi eld, laboratory, mathematical and statistical methods were used in the experiment according to the generally accepted methods and guidelines in Ukraine. It was found out that the highest level of productivity was formed by wheat plants of Maria winter variety on the background of application of pre-sowing cultivation of mineral fertilizers at a N30P30 dose with the use of foliar fertilization with organic-mineral fertilizer ROST, solution (2.0 l/ha) at the beginning of the restoration of spring vegetation and in a stage of the fl ag leaf and chemical protection of plants using fungicide – Colossal, emulsion concentrate (1.0 l/ha). Thus, on average during the years of research, the grain yield in this variant was 4.96 t/ha, the number of productive stems – 411 pieces/m2, the number of grains in the ear – 27.6 pieces, the mass of 1000 grains – 51.5g. When using the chemical method of protection to control dark brown spotting (Drechslera sorociniana Subram) of winter wheat, the rate of development of the disease ranged 2.0–3.1 %, and the eff ectiveness ranged 83.1 – 89.4 %. Key words: fertilizers, biologicals, fungicide, yield, foliar feeding, plant protection.

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Response of Winter Wheat Grain Yield and Phosphorus Uptake to Foliar Phosphite Fertilization

International Journal of Agronomy ◽

10.1155/2014/801626 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 8

Author(s):

Muaid S. Ali ◽

Apurba Sutradhar ◽

Ma Lourdes Edano ◽

Jeffrey T. Edwards ◽

Kefyalew Girma

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Foliar Application ◽

Nutrient Use Efficiency ◽

Phosphorus Uptake ◽

Field Trials ◽

P Uptake ◽

Wheat Grain ◽

P Concentration ◽

Two Stages

One of the major problems that potentially hinders the use of foliar fertilization as a tool to improve nutrient use efficiency is the lack of effective formulations. A phosphite based product, Nutri-phite (3% N, 8.7% P, and 5.8% K) was used as model phosphite formulation for foliar application in winter wheat (Triticum aestivumL). Five field trials were established in the fall of 2009 and 2010 at Perkins, Perry, and Morrison, OK. Treatments encompassed the application of nitrogen (N) at 100 or 75% of crop need and phosphorus at 100 (P 100%) and 80% (P 80%) sufficiency with and without Nutri-phite. Nutri-phite was applied at one and/or two stages of wheat; GS 13 to 14 and GS 49 to 53 at the rate of 433 and 148 g ha−1P and N, respectively. Grain yield was increased by Nutri-phite treatments, especially at Morrison. Grain P concentration of plots treated with two applications of Nutri-phite ranged from 13 to 55% more than the nontreated and standard NP received plots at Perkins in 2009/10 and Perry in 2010/11. Grain P uptake was increased due to application of Nutri-phite at Perkins in 2009/10 and Morrison and Perry in 2010/11. Combined over three year-locations, Nutri-phite increased grain P concentration by 11.6%. The higher grain P concentration of plots treated with Nutri-phite compared to the other treatments clearly demonstrates its potential in improving P status of wheat grain.

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