scholarly journals Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation to Phosphorus Fertilization, Crop Sequence and Tillage Management

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Xiaopeng Gao ◽  
Cynthia A. Grant
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Field Experiments ◽  
Interactive Effect ◽  
Conventional Tillage ◽  
Grain Protein Content ◽  
Phosphorus Fertilization ◽  
Beneficial Effects ◽  
The Impact ◽  
Crop Sequence

Field experiments were conducted at two locations in Manitoba, Canada, to determine the effect of crop rotation, phosphorus (P) fertilization and tillage on grain yield and grain concentrations of Cd and Zn in durum wheat (Triticum durumL.). Compared to conventional tillage (CT), reduced tillage (RT) management decreased grain Cd and increased grain yield and grain Zn in half of the site-years. The type of preceding crops of spring wheat-flax or canola-flax had little influence. Rate and timing of P application had little effect on grain Cd, but increasing P rate tended to decrease grain Zn. No interactive effect was detected among tested factors. Grain Zn was not related to grain Cd, but positively to other nutrients such as Fe, Mn, P, Ca, K, and Mg. Both grain Zn and Fe correlated positively with grain protein content, suggesting protein may represent a sink for micronutrients. The study suggested that the tillage management may have beneficial effects on both grain yield and quality. Phosphorus fertilizer can remain available for subsequent crops and high annual inputs in the crop sequence may decrease crop grain Zn. Understanding the environment is important in determining the impact of agricultural management on agronomic and nutrient traits.

scholarly journals The impact of cultivar resistance and fungicide treatment on mycotoxin content in grain and yield losses caused by Fusarium head blight in wheat

2010 ◽  
Vol 46 (No. 1) ◽  
pp. 21-26 ◽  
Author(s):  
V. Šíp ◽  
J. Chrpová ◽  
O. Veškrna ◽  
L. Bobková
Keyword(s):  
Grain Yield ◽  
Fusarium Head Blight ◽  
Field Experiments ◽  
Yield Loss ◽  
Joint Effect ◽  
Yield Losses ◽  
Cultivar Resistance ◽  
Head Blight ◽  
Fungicide Treatment ◽  
The Impact

Reactions to artificial infection with Fusarium graminearum isolates and a new fungicide Swing Top were studied in nine winter wheat cultivars evaluated in field experiments at two sites for three years for expression of symptoms, deoxynivalenol (DON) content in grain and grain yield. The results demonstrate a pronounced and relatively stable effect of cultivar resistance on reducing head blight, grain yield losses and contamination of grain by the mycotoxin DON. It is advantageous that the moderate level of resistance to Fusarium head blight (FHB) was detected also in two commonly grown Czech cultivars Sakura and Simila. Average fungicide efficacy for DON was 49.5% and 63.9% for a reduction in yield loss, however, it was found highly variable in different years and sites. The joint effect of cultivar resistance and fungicide treatment was 86.5% for DON and even 95.4% for reducing the yield loss. A very high risk was documented for susceptible cultivars and also the effects of medium responsive cultivars were found to be highly variable in different environments and therefore not guaranteeing sufficient protection against FHB under different conditions.

The interaction between soil pH and phosphorus for wheat yield and the impact of lime-induced changes to soil aluminium and potassium

Soil Research ◽  
2017 ◽  
Vol 55 (4) ◽  
pp. 341 ◽  
Author(s):  
Craig A. Scanlan ◽  
Ross F. Brennan ◽  
Mario F. D'Antuono ◽  
Gavin A. Sarre
Keyword(s):  
Grain Yield ◽  
Soil Ph ◽  
Field Experiments ◽  
Wheat Yield ◽  
Acid Soils ◽  
Combined Effect ◽  
Additive Effect ◽  
Yield Response ◽  
Response Curves ◽  
The Impact

Interactions between soil pH and phosphorus (P) for plant growth have been widely reported; however, most studies have been based on pasture species, and the agronomic importance of this interaction for acid-tolerant wheat in soils with near-sufficient levels of fertility is unclear. We conducted field experiments with wheat at two sites with acid soils where lime treatments that had been applied in the 6 years preceding the experiments caused significant changes to soil pH, extractable aluminium (Al), soil nutrients and exchangeable cations. Soil pH(CaCl2) at 0–10cm was 4.7 without lime and 6.2 with lime at Merredin, and 4.7 without lime and 6.5 with lime at Wongan Hills. A significant lime×P interaction (P<0.05) for grain yield was observed at both sites. At Merredin, this interaction was negative, i.e. the combined effect of soil pH and P was less than their additive effect; the difference between the dose–response curves without lime and with lime was greatest at 0kgPha–1 and the curves converged at 32kgPha–1. At Wongan Hills, the interaction was positive (combined effect greater than the additive effect), and lime application reduced grain yield. The lime×P interactions observed are agronomically important because different fertiliser P levels were required to maximise grain yield. A lime-induced reduction in Al phytotoxicity was the dominant mechanism for this interaction at Merredin. The negative grain yield response to lime at Wongan Hills was attributed to a combination of marginal soil potassium (K) supply and lime-induced reduction in soil K availability.

scholarly journals ẢNH HƯỞNG CỦA MỘT SỐ BIỆN PHÁP KỸ THUẬT CANH TÁC ĐẾN SINH TRƯỞNG, PHÁT TRIỂN VÀ NĂNG SUẤT CỦA GIỐNG NGÔ LAI HQ2000

2020 ◽  
Vol 4 (2) ◽  
pp. 1878-1887
Author(s):  
Nguyễn Trung Hải ◽  
Trần Thanh Đức ◽  
Vi Thị Linh
Keyword(s):  
Grain Yield ◽  
Conventional Tillage ◽  
Planting Density ◽  
No Tillage ◽  
Minimum Tillage ◽  
Root Position ◽  
Tillage Treatment ◽  
Experimental Treatments ◽  
The Impact ◽  
Tillage Methods

Nghiên cứu này nhằm đánh giá tác động của các biện pháp làm đất và mật độ trồng khác nhau đến quá trình sinh trưởng, phát triển, năng suất và hiệu quả kinh tế của giống ngô lai HQ2000 trên đất cát nội đồng trong vụ Đông Xuân năm 2018-2019 tại Thừa Thiên Huế. Thí nghiệm thứ nhất gồm 3 công thức gồm làm đất truyền thống, làm đất tối thiểu và không làm đất trong đó thí nghiệm thứ hai gồm 4 công thức với mật độ gieo trồng lần lượt là 47.058, 53.333, 61.538 và 66.666 cây/ha. Kết quả thí nghiệm cho thấy: Thời gian hoàn thành các giai đoạn sinh trưởng và phát triển ở các biện pháp làm đất tối thiểu có xu hướng ngắn hơn các công thức làm đất truyền thống; chiều cao cây cuối cùng dao động từ 154 đến 175cm, số lá dao động từ 16 đến 18 lá, diện tích lá đóng bắp có xu hướng giảm ở các công thức làm đất tối thiểu trong khi các yếu tố khác như chiều cao đóng bắp, chiều dài bắp, đường kính bắp và đường kính lóng gốc ở các công thức thí nghiệm dao động tương đối ít. Năng suất lý thuyết dao động từ 61 đến 72 tạ/ha, năng suất thực thu đạt cao nhất là 59,8 tạ/ha ở công thức không làm đất. Đối với biện pháp canh tác truyền thống, năng suất đạt cao nhất ở mật độ 18,5 kg hạt giống/ha (63,4 tạ/ha). Ở các công thức thí nghiệm, lợi nhuận đạt cao nhất ở công thức không làm đất và ở mật độ trồng là 18,5 kg hạt giống/ha, tương đương 61.538 cây/ha.  ABSTRACT This study aims to evaluate the impact of different tillage methods and planting densities on the growth, development, grain yield and economic efficiency of hybrid maize HQ2000 on sandy soil in the 2018-2019 Winter-Spring season in Thua Thien Hue province. The first trial consisted of three treatments including conventional tillage, limited tillage and no tillage; the second trial consisted of four treatments with planting density of 47.058, 53.333, 61.538 và 66.666 plants/ha, respectively. Experimental results showed that: The completed time of the growth and development stages at the minimum tillage methods was shorter than conventional tillage treatments; final plant height varied from 154 to 175cm, the number of leaves ranged from 16 to 18 leaves, the leaf area at ​​corn position decreased in minimum tillage treatments while other factors such as ear height, ear length, ear diameter and stalk diameter at prop root position fluctuated slightly. Potential grain yield varied from 6.1 to 7.2 tons/ha, the highest actual grain yield was 5.98 tons/ha in the no-tillage treatment. For conventional tillage, the highest grain yield was at 18.5 kg seed/ha treatment (6.34 tons/ha). In the experimental treatments, the highest profit was achieved in the no-tillage treatment and in planting density of 18.5 kg seed/ha, equivalent 61,538 plants/ha.      

scholarly journals Assessment of the Effect of the Mineral Fertilization System on the Nutritional Status of Maize Plants and Grain Yield Prediction

Agriculture ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 404
Author(s):  
Renata Gaj ◽  
Piotr Szulc ◽  
Idzi Siatkowski ◽  
Hubert Waligóra
Keyword(s):  
Nutritional Status ◽  
Grain Yield ◽  
Field Experiments ◽  
Plant Biomass ◽  
Calcium Content ◽  
Development Stage ◽  
Mineral Fertilization ◽  
Stay Green ◽  
Maize Varieties ◽  
The Impact

A strict field experiment with maize was carried out in the years 2009–2011 at the Experimental Station of the Poznań University of Life Sciences. The impact of mineral fertilization levels on the nutritional status of plants at an early development stage 5–6 leaves (BBCH 15/16) was assessed, as well as the possibility of using biomass and the current state of nutrient supply to predict grain yield. The adopted assumptions were verified on the basis of field experiments with nine variants of mineral fertilization and two maize varieties (EURALIS Semences, Lescar, France) (ES Palazzo and ES Paroli SG—“stay-green” (SG)). Regardless of the variety tested, the plants were under-nutritioned with calcium and magnesium. Plant nutritional status and the accumulation of minerals at the BBCH 15/16 stage were the main factors determining the variability of maize grain yields. In addition, it was shown that maize biomass in the BBCH 15/16 stage, calcium content and the N:K ratio significantly determined grain yield of traditional variety. The yield of the “stay-green” hybrid was largely shaped by plant biomass in the BBCH 15/16 stage, potassium, calcium, magnesium contents and N:Mg ratio. Regression analysis showed that grain yield of the tested maize varieties was determined by plant biomass and its content from 59% to 69%.

scholarly journals Relationships Between Early Wheat Streak Mosaic Severity Levels and Grain Yield: Implications for Management Decisions

Plant Disease ◽  
2017 ◽  
Vol 101 (9) ◽  
pp. 1621-1626 ◽  
Author(s):  
F. Workneh ◽  
S. O’Shaughnessy ◽  
S. Evett ◽  
C. M. Rush
Keyword(s):  
Grain Yield ◽  
Disease Severity ◽  
Water Conservation ◽  
Field Experiments ◽  
Regression Function ◽  
High Plains ◽  
Management Decisions ◽  
Texas High Plains ◽  
Severity Levels ◽  
The Impact

Wheat streak mosaic (WSM) caused by Wheat streak mosaic virus, which is transmitted by the wheat curl mite (Aceria tosichella), is a major yield-limiting disease in the Texas High Plains. In addition to its impact on grain production, the disease reduces water-use efficiency by affecting root development. Because of the declining Ogallala Aquifer water level, water conservation has become one of the major pressing issues in the region. Thus, questions are often raised as to whether it is worthwhile to irrigate infected fields in light of the water conservation issues, associated energy costs, and current wheat prices. To address some of these questions, field experiments were conducted in 2013 and 2016 at two separate locations to determine whether grain yield could be predicted from disease severity levels, assessed early in the spring, for potential use as a decision tool for crop management, including irrigation. In both fields, disease severity assessments started in April, using a handheld hyperspectral radiometer with which reflectance measurements were taken weekly in multiple plots in arbitrarily selected locations across the fields. The relationship between WSM severity levels and grain yield for the different assessment dates were determined by fitting reflectance and yield values into the logistic regression function. The model predicted yield levels with r2 values ranging from 0.67 to 0.85 (P < 0.0001), indicating that the impact of WSM on grain yield could be fairly well predicted from early assessments of WSM severity levels. As the disease is normally progressive over time, this type of information will be useful for making management decisions of whether to continue irrigating infected fields, especially if combined with an economic threshold for WSM severity levels.

Influence of source, timing and placement of nitrogen on grain yield and nitrogen removal of durum wheat under reduced- and conventional-tillage management

2001 ◽  
Vol 81 (1) ◽  
pp. 17-27 ◽  
Author(s):  
C. A. Grant ◽  
K. R. Brown ◽  
G. J. Racz ◽  
L. D. Bailey
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Sandy Loam ◽  
Conservation Tillage ◽  
Field Studies ◽  
Conventional Tillage ◽  
Yield Potential ◽  
High Yield ◽  
N Recovery ◽  
Available N

Effective fertilizer management is critical to maintain economic production and protect long-term environmental quality. Field studies were conducted over 4 yr at two locations in southwestern Manitoba to determine the effect of source, timing and placement of N on grain yield and N recovery of durum wheat (Triticum durum L. ‘Sceptre’) under reduced-tillage (RT) and conventional-tillage (CT) management. The effect of N management on durum grain yield and N recovery differed with soil type and tillage system. On the clay loam (CL) soil, lower yields with fall- as compared with spring-banded N were more frequent under RT than CT. Lower yields occurred more frequently with fall-applied as compared with spring-applied urea ammonium nitrate (UAN) than when urea or NH3 was the N source. On the drier fine sandy loam (FSL) soil, fall applications of N generally produced similar to higher grain yield than did spring applications. Differences among fertilizer sources and tillage systems were much less frequent with spring than fall applications of N. Where differences occurred, durum grain yields were higher with in-soil than surface applications of urea or UAN. In-soil applications of urea and UAN increased durum grain yield as compared with surface applications more frequently under RT than CT on the CL soil where yield potential was high, whereas increases on the FSL were as common under CT as under RT. On soils with a high yield potential, enhanced immobilisation and/or volatilisation of surface-applied N may reduce grain yield by reducing available N, particularly under RT. Selection of a suitable source-timing and placement combination to optimise crop yield may be more important under RT than CT. Key words: Conservation tillage, direct seeding, placement

scholarly journals Comparative Performances of Beneficial Microorganisms on the Induction of Durum Wheat Tolerance to Fusarium Head Blight

2021 ◽  
Vol 9 (12) ◽  
pp. 2410
Author(s):  
Zayneb Kthiri ◽  
Maissa Ben Jabeur ◽  
Kalthoum Harbaoui ◽  
Chahine Karmous ◽  
Zoubeir Chamekh ◽  
...  
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Fusarium Head Blight ◽  
Isotope Composition ◽  
Canopy Temperature ◽  
Seed Coating ◽  
Head Blight ◽  
C Metabolism ◽  
Carbon And Nitrogen Content ◽  
The Impact

Durum wheat production is seriously threatened by Fusarium head blight (FHB) attacks in Tunisia, and the seed coating by bio-agents is a great alternative for chemical disease control. This study focuses on evaluating, under field conditions, the effect of seed coating with Trichoderma harzianum, Meyerozyma guilliermondii and their combination on (i) FHB severity, durum wheat grain yield and TKW in three crop seasons, and (ii) on physiological parameters and the carbon and nitrogen content and isotope composition in leaves and grains of durum wheat. The results indicated that the treatments were effective in reducing FHB severity by 30 to 70% and increasing grain yield with an increased rate ranging from 25 to 68%, compared to the inoculated control. The impact of treatments on grain yield improvement was associated with higher NDVI and chlorophyll content and lower canopy temperature. Furthermore, the treatments mitigated the FHB adverse effects on N and C metabolism by resulting in a higher δ13Cgrain (13C/12Cgrain) and δ15Ngrain (15N/14Ngrain). Overall, the combination outperformed the other seed treatments by producing the highest grain yield and TKW. The high potency of seed coating with the combination suggests that the two microorganisms have synergetic or complementary impacts on wheat.

Influence of Rhizophagus intraradices and phosphorus fertilization on growth, yield and N P content in grain of Phaseolus vulgaris.

2017 ◽  
Author(s):  
Juan Francisco Aguirre-Medina ◽  
Juan Francisco Aguirre- Cadena ◽  
Jorge Cadena-Iñiguez ◽  
María de Lourdes Arevalo-Galarza ◽  
Raymundo Rosas-Quijano ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Grain Yield ◽  
Block Design ◽  
Growth Yield ◽  
Phosphorus Fertilization ◽  
Phaseolus Vulgaris L ◽  
Rhizophagus Intraradices ◽  
Randomized Block Design ◽  
P Content ◽  
The Impact

The impact of Rhizophagus intraradices (RI) interaction with phosphorus fertilization on the yield of Phaseolus vulgaris L. var. Negro Tacaná, and the N and P content in plant tissue and grain were determined. The experiment consisted of six treatments:1) Control, 2) RI, 3) 40 kg.ha-1 of P2O5, 4) RI + 40 kg.ha-1 of P2O5, 5) RI + 26 kg.ha-1 of P2O5, and 6) RI + 13 kg.ha-1 of P2O5, using a randomized block design with four replicates. Results probed that inoculation of plants with RI promoted a better health, growth and grain yield. In particular, grain yield inoculated with RI presented similar values as obtained with inorganic fertilization of 40 kg.ha-1 of P2O5, indicating that inorganic fertilization can be fully substituted by RI. The use of this technology provides an efficient use of soil nutrients, which is translated into a lower investment for producers.

Influence of Phosphorus Fertilizers Application on Phosphorus use Efficiency and Grain Protein of Winter Wheat in Alkaline-Calcareous Soil, Southern Algeria

2019 ◽  
Author(s):  
N Boukhalfa Deraoui ◽  
L Hanifi Mekliche ◽  
A Mekliche ◽  
H Cheloufi ◽  
S Babahani
Keyword(s):  
Winter Wheat ◽  
Field Experiments ◽  
N Uptake ◽  
Ammonium Phosphate ◽  
Grain Protein Content ◽  
Phosphorus Fertilization ◽  
Grain Protein ◽  
Phosphorus Use Efficiency ◽  
Use Efficiency ◽  
Single Super Phosphate

hree field experiments (2008 to 2011) were conducted to evaluate the ability of winter wheat (Triticum durum Desf. var. Carioca) to utilize and acquire soil phosphorus and nitrogen under different sources of phosphate fertilizers (Fosfactyl, Single super phosphate and Mono-ammonium-phosphate) and rates of applications (30, 60, 90 and 120 kg Pha-1) with a fixed level of nitrogen fertilization. Results revealed a significant effect of P rates on phosphorus use efficiency (PUE) and nitrogen use efficiency (NUE); however, P sources fertilizer had non-significant effect in all three cropping seasons. PUE and NUE decreased markedly with increasing P supply that did not result in an improvement of P and N uptake. Grain protein content was significantly influenced by phosphorus fertilization in 2008-09. The best values were obtained by Single super phosphate and P rate 60 kg ha-1.

scholarly journals Response of weed populations to tillage, reduced herbicide and fertilizer rates in wheat (Triticum aestivum) production

2003 ◽  
Vol 21 (1) ◽  
pp. 105-110 ◽  
Author(s):  
H.A. Acciaresi ◽  
H.V. Balbi ◽  
M.L. Bravo ◽  
H.O. Chidichimo
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Conventional Tillage ◽  
Fertilization Rate ◽  
Weed Biomass ◽  
Weed Growth ◽  
Medium Level ◽  
One Year ◽  
Conventional Ct ◽  
Dose Levels

Field experiments were carried out in 1999 and 2000 to investigate the effects of conventional (CT) and no-tillage (NT) systems, interacting with three herbicide dose levels and three nitrogen (N) levels on weed growth and wheat production of two varieties. There was a higher grain yield for NT system compared with CT in one year. CT weed biomass was lower than from NT weed biomass, in both varieties. No differences on wheat biomass and grain yield were observed between full and reduced herbicide rates. N fertilizer increased wheat biomass and grain yield significantly. Only N medium level had an effect upon weed biomass with respect to non-fertilized plots, while the highest fertilization rate lowered weed biomass. Conventional tillage, reduced herbicide rates and nitrogen fertilization were effective ways of limiting weed production in wheat.

Sign in / Sign up

Export Citation Format

Share Document