RESPONSE OF MAX SPRING WHEAT TO MANAGEMENT INPUTS

1987 ◽  
Vol 67 (3) ◽  
pp. 645-652 ◽  
Author(s):  
C. D. CALDWELL ◽  
C. E. STARRATT
Keyword(s):  
Winter Wheat ◽  
Plant Height ◽  
Spring Wheat ◽  
Growth Response ◽  
Interactive Effects ◽  
Chlormequat Chloride ◽  
Protein Levels ◽  
Leaf Disease ◽  
Nitrogen Fertility ◽  
The Individual

Experiments were conducted to investigate the individual and interactive effects of nitrogen fertility, plant growth regulators and a fungicide on the growth response of Max spring wheat under Nova Scotia conditions. A lack of interactive effects of these three management factors was found, both under dry and sustained moist conditions. Increased nitrogen tended to produce lush growth and greater leaf disease. It also increased grain protein levels to acceptable milling levels. The rate of chlormequat chloride recommended for winter wheat (0.92 kg a.i. ha−1), applied at Zadoks growth stage (ZGS) 31, produced excessive reduction in plant height, tended to induce higher levels of leaf disease and depressed kernel size. Ethephon, applied at the rate recommended for winter wheat (0.42 kg a.i. ha−1) at ZGS 45, effectively reduced plant height without detrimental side effects. Propiconazole effectively reduced the incidence of powdery mildew, septoria and leaf rust and increased yields over unsprayed check plots. Timing of application affected the spectrum of disease controlled. Two applications of the fungicide (ZGS 32 and 45) gave excellent disease control and highest yields.Key words: Max, wheat (spring), chlormequat chloride, ethephon, propiconazole, nitrogen

Evaluating organic bread wheat as a rotation crop for organic dairy farms

2017 ◽  
Vol 33 (2) ◽  
pp. 163-178 ◽  
Author(s):  
Erin H. Roche ◽  
Ellen B. Mallory ◽  
Thomas Molloy ◽  
Richard J. Kersbergen
Keyword(s):  
Winter Wheat ◽  
Bread Wheat ◽  
Spring Wheat ◽  
Corn Silage ◽  
Spike Density ◽  
Protein Levels ◽  
Organic Dairy ◽  
Perennial Legume ◽  
One Year ◽  
Organic Dairy Farms

AbstractThe rising demand for local, organic bread wheat (Triticum aestivum L.) in the northeastern USA may be an economic and agronomic opportunity for organic dairy producers. Bread wheat must produce adequate grain yields and crude protein (CP) levels to be profitable as a food crop and must complement the on-farm production of high-quality dairy feed. A field study evaluated bread wheat and perennial forage performance in five 3-year crop sequences all ending in a perennial legume/grass forage. The sequences differed by wheat type (winter or spring) and the crop prior to wheat: (1) corn silage (Zea mays L.), (2) soybean (Glycine max L.) or (3) one-year-old perennial forage. Wheat sequences were compared with a sequence of two years of corn silage followed by a new perennial forage seeding and with a continuous perennial forage control. Winter wheat spike density, wheat aboveground biomass and nitrogen uptake were always greater than spring wheat. Wheat grain yield and CP were strongly affected by wheat type, with winter wheat having greater yield but lower CP than spring wheat. At one site-year, winter wheat CP was 15 g kg−1 higher following perennial forage than following corn. Only spring wheat met the bread flour industry standard for CP. Newly established perennial forage following wheat had higher yields and legume composition in both years, along with higher projected milk yields in one year, than the continuous perennial forage. Three-year net revenue based on off-farm sales were on average US$ 741 ha−1 higher for sequences with winter wheat than those with spring wheat, and were equal to the perennial forage control. Rotations that included wheat would likely be more competitive if straw were sold or used on the farm, or, if topdressing practices or varietal choice were used to increase grain protein levels of winter wheat.

INFLUENCE OF TECHNOLOGY ELEMENTS ON THE STRUCTURE OF THE CROP AND THE QUALITY OF SPRING WHEAT

2020 ◽  
Vol 15 (7) ◽  
pp. 913-923
Author(s):  
V.G. Vlasov ◽  
◽  
L.G. Zakharova ◽  
Keyword(s):  
Winter Wheat ◽  
Spring Wheat ◽  
Wheat Variety ◽  
Mineral Fertilizer ◽  
Steppe Zone ◽  
Soft Wheat ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Chlormequat Chloride ◽  
Spring Soft Wheat

The results of studying the influence of elements of the technology of cultivation of spring wheat (various predecessors, methods of basic tillage, doses of mineral fertilizers) in order to obtain grain that meet the food requirements (GOST 9353-2016) are presented. The studies were carried out in 2015–2017 in the Ulyanovsk region in the forest-steppe zone on leached chernozem. The object was the Ulyanovskaya 105 spring soft wheat variety, which has been recommended for cultivation in the Volgo-Vyatka (4), Middle Volga (7), Ural (9) regions of the Russian Federation since 2017. The scheme of the experiment provided for placement after peas and winter wheat, autumn main dumping and shallow tillage. In each of the options, the sowing was carried out using three backgrounds of mineral fertilizer – N24Р6 К0 kg/ha a.i. before sowing; N64Р18К35 kg/ha d.v. before sowing + retardant “Tse Tse Tse 750” (chlormequat chloride); N50Р30К70 kg/ha d.v. before sowing + N25 in tillering + N30 after heading + retardant “Tse Tse Tse 750”, calculated for the planned yield of 4.0; 5.0 and 6.0 t/ha, respectively. The meteorological conditions in the years of research were characterized by uneven precipitation (HTC in 2015 – 0.7; in 2016 – 0.8; in 2017 – 1.4). The grain yield of the studied variety of spring soft wheat on average for the variants of the experiment ranged from 3.82 t/ha to 5.60 t/ha with its high quality. The largest amount of protein (720–760 kg/ha) and grain weight per ear (1.07–1.08 g) were formed by the predecessor of peas after plowing against the background of the introduction of mineral fertilizers in doses calculated for the planned yield of 5.0–6,0 t/ha. In terms of the content of crude gluten (28.1–30.9%), in nature (786–798) and vitreousness (87–91%), the grain corresponded to the indicators of class 2, in terms of protein content in the grain (12.5–13.5%) – indicators of the 3rd class of GOST 9353-2016. Higher quality grain with a higher yield level was formed according to the pea predecessor. The coefficient of elasticity of flour dough within the normal range for strong wheat (0.70–0.85) was observed on all variants of plowing and on 1 background of mineral fertilizers for fine processing according to the predecessor winter wheat, as well as on 1 and 2 backgrounds of mineral fertilizers according to to both methods of basic tillage according to the pea precursor. According to the general baking assessment (4.1–4.4 points), the Ulyanovskaya 105 variety corresponded to the norm for valuable crop varieties.

scholarly journals Interactive effects between travel behaviour and COVID-19: a questionnaire study

2021 ◽  
Author(s):  
Jinbao Zhang ◽  
Jaeyoung Lee
Keyword(s):  
Early Stage ◽  
Travel Behaviour ◽  
Interactive Effects ◽  
Factors Affecting ◽  
Individual Level ◽  
Passenger Volume ◽  
Spatial Autoregressive ◽  
Railway Passenger ◽  
The Individual ◽  
And Control

Abstract This study has two main objectives: (i) to analyse the effect of travel characteristics on the spreading of disease, and (ii) to determine the effect of COVID-19 on travel behaviour at the individual level. First, the study analyses the effect of passenger volume and the proportions of different modes of travel on the spread of COVID-19 in the early stage. The developed spatial autoregressive model shows that total passenger volume and proportions of air and railway passenger volumes are positively associated with the cumulative confirmed cases. Second, a questionnaire is analysed to determine changes in travel behaviour after COVID-19. The results indicate that the number of total trips considerably decreased. Public transport usage decreased by 20.5%, while private car usage increased by 6.4%. Then the factors affecting the changes in travel behaviour are analysed by logit models. The findings reveal significant factors, including gender, occupation and travel restriction. It is expected that the findings from this study would be helpful for management and control of traffic during a pandemic.

scholarly journals Winter Wheat Adaptation to Climate Change in Turkey

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 689
Author(s):  
Yuksel Kaya
Keyword(s):  
Climate Change ◽  
Winter Wheat ◽  
Grain Yield ◽  
Spring Wheat ◽  
Control Treatment ◽  
Climate Change Scenarios ◽  
Combined Effects ◽  
Adaptation To Climate Change ◽  
Wheat Genotypes ◽  
Plant Characteristics

Climate change scenarios reveal that Turkey’s wheat production area is under the combined effects of heat and drought stresses. The adverse effects of climate change have just begun to be experienced in Turkey’s spring and the winter wheat zones. However, climate change is likely to affect the winter wheat zone more severely. Fortunately, there is a fast, repeatable, reliable and relatively affordable way to predict climate change effects on winter wheat (e.g., testing winter wheat in the spring wheat zone). For this purpose, 36 wheat genotypes in total, consisting of 14 spring and 22 winter types, were tested under the field conditions of the Southeastern Anatolia Region, a representative of the spring wheat zone of Turkey, during the two cropping seasons (2017–2018 and 2019–2020). Simultaneous heat (>30 °C) and drought (<40 mm) stresses occurring in May and June during both growing seasons caused drastic losses in winter wheat grain yield and its components. Declines in plant characteristics of winter wheat genotypes, compared to those of spring wheat genotypes using as a control treatment, were determined as follows: 46.3% in grain yield, 23.7% in harvest index, 30.5% in grains per spike and 19.4% in thousand kernel weight, whereas an increase of 282.2% in spike sterility occurred. On the other hand, no substantial changes were observed in plant height (10 cm longer than that of spring wheat) and on days to heading (25 days more than that of spring wheat) of winter wheat genotypes. In general, taller winter wheat genotypes tended to lodge. Meanwhile, it became impossible to avoid the combined effects of heat and drought stresses during anthesis and grain filling periods because the time to heading of winter wheat genotypes could not be shortened significantly. In conclusion, our research findings showed that many winter wheat genotypes would not successfully adapt to climate change. It was determined that specific plant characteristics such as vernalization requirement, photoperiod sensitivity, long phenological duration (lack of earliness per se) and vulnerability to diseases prevailing in the spring wheat zone, made winter wheat difficult to adapt to climate change. The most important strategic step that can be taken to overcome these challenges is that Turkey’s wheat breeding program objectives should be harmonized with the climate change scenarios.

scholarly journals Crosses with spelt improve tolerance of South Asian spring wheat to spot blotch, terminal heat stress, and their combination

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ajeet Kumar Pandey ◽  
Vinod Kumar Mishra ◽  
Ramesh Chand ◽  
Sudhir Navathe ◽  
Neeraj Budhlakoti ◽  
...  
Keyword(s):  
Grain Yield ◽  
Spring Wheat ◽  
High Performance ◽  
Recombinant Inbred Lines ◽  
Spot Blotch ◽  
Spikelet Sterility ◽  
Strong Negative Correlation ◽  
Terminal Heat Stress ◽  
H 26 ◽  
The Individual

AbstractSpot blotch and terminal heat are two of the most important stresses for wheat in South Asia. A study was initiated to explore the use of spelt (Triticum spelta) to improve tolerance to these stresses in spring wheat (T. aestivum). We assessed 185 recombinant inbred lines (RILs) from the cross T. spelta (H + 26) × T. aestivum (cv. HUW234), under the individual stresses and their combination. H + 26 showed better tolerance to the single stresses and also their combination; grain yield in RILs was reduced by 21.9%, 27.7% and 39.0% under spot blotch, terminal heat and their combined effect, respectively. However, phenological and plant architectural traits were not affected by spot blotch itself. Multivariate analysis demonstrated a strong negative correlation between spikelet sterility and grain yield under spot blotch, terminal heat and their combination. However, four recombinant lines demonstrated high performance under both stresses and also under their combined stress. The four lines were significantly superior in grain yield and showed significantly lower AUDPC than the better parent. This study demonstrates the potential of spelt wheat in enhancing tolerance to spot blotch and terminal heat stresses. It also provides comprehensive evidence about the expression of yield and phenological traits under these stresses.

scholarly journals Effect of Salinity Stress on Physiological Changes in Winter and Spring Wheat

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1193
Author(s):  
Muhammad Sohail Saddiq ◽  
Shahid Iqbal ◽  
Muhammad Bilal Hafeez ◽  
Amir M. H. Ibrahim ◽  
Ali Raza ◽  
...  
Keyword(s):  
Salt Stress ◽  
Chlorophyll Fluorescence ◽  
Winter Wheat ◽  
Spring Wheat ◽  
Root Length ◽  
Growth Traits ◽  
Triticum Aestivum L ◽  
Shoot Length ◽  
Plant Tolerance ◽  
Improvement Programs

Salinity is a leading threat to crop growth throughout the world. Salt stress induces altered physiological processes and several inhibitory effects on the growth of cereals, including wheat (Triticum aestivum L.). In this study, we determined the effects of salinity on five spring and five winter wheat genotypes seedlings. We evaluated the salt stress on root and shoot growth attributes, i.e., root length (RL), shoot length (SL), the relative growth rate of root length (RGR-RL), and shoot length (RGR-SL). The ionic content of the leaves was also measured. Physiological traits were also assessed, including stomatal conductance (gs), chlorophyll content index (CCI), and light-adapted leaf chlorophyll fluorescence, i.e., the quantum yield of photosystem II (Fv′/Fm′) and instantaneous chlorophyll fluorescence (Ft). Physiological and growth performance under salt stress (0, 100, and 200 mol/L) were explored at the seedling stage. The analysis showed that spring wheat accumulated low Na+ and high K+ in leaf blades compared with winter wheat. Among the genotypes, Sakha 8, S-24, W4909, and W4910 performed better and had improved physiological attributes (gs, Fv′/Fm′, and Ft) and seedling growth traits (RL, SL, RGR-SL, and RGR-RL), which were strongly linked with proper Na+ and K+ discrimination in leaves and the CCI in leaves. The identified genotypes could represent valuable resources for genetic improvement programs to provide a greater understanding of plant tolerance to salt stress.

HARMFUL EFFECT OF WORKED-DOWN WINTER WHEAT ON SPRING-SEEDED WHEAT AND RAPESEED

1983 ◽  
Vol 63 (1) ◽  
pp. 299-301 ◽  
Author(s):  
S. FREYMAN ◽  
G. B. SCHAALJE
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Spring Wheat ◽  
Detrimental Effect ◽  
Brassica Campestris ◽  
Harmful Effect ◽  
Triticum Aestivum L ◽  
Causative Effect ◽  
Effect On Yield

Where winter wheat (Triticum aestivum L. ’Norstar’) was worked-down on 1 May and the plots reseeded to spring wheat immediately, no detrimental effect on yield of spring wheat was found. However, delaying this action until 15 May reduced the yields of spring-seeded wheat because of the harmful effect of decomposing winter wheat and late seeding. Moisture depletion by winter wheat was eliminated as a causative effect by light irrigations during May. Yields of rapeseed (Brassica campestris L. ’Candle’) were not so severely reduced by worked-down winter wheat. The harmful effect was significant only with 30 May cultivation and seeding date.Key words: Phytotoxicity, Triticum aestivum, Brassica campestris, worked-down

Weed Seedling Emergence and Survival as Affected by Crop Canopy

2008 ◽  
Vol 22 (4) ◽  
pp. 736-740 ◽  
Author(s):  
Randy L. Anderson
Keyword(s):  
Winter Wheat ◽  
Seed Production ◽  
Spring Wheat ◽  
Seedling Emergence ◽  
Crop Canopy ◽  
Cool Season ◽  
Common Lambsquarters ◽  
Green Foxtail ◽  
Seedling Emergence And Survival ◽  
Weed Dynamics

This study measured impact of cool-season crops on seedling emergence, survival, and seed production of weeds common in corn and soybean. Weed dynamics were monitored in permanently marked quadrats in winter wheat, spring wheat, and canola. Three species, green foxtail, yellow foxtail, and common lambsquarters, comprised more than 80% of the weeds observed in the study. Seedling emergence was reduced by winter wheat, but not by spring wheat or canola, when compared with adjacent quadrats without a crop canopy. Approximately 10% of seedlings in spring wheat and canola developed into seed-bearing plants, but no seed-bearing plants were present in winter wheat at harvest. Common lambsquarters produced more than 1,100 seeds/plant, whereas a foxtail plant produced 85 seeds, averaged across spring wheat and canola. At harvest, new seedlings were present in all crops; thus, control after harvest will be required to prevent seed production in the fall. Winter wheat may provide an opportunity to disrupt population dynamics of weeds common in corn and soybean without requiring herbicides.

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