RESPIRATION OF WINTER WHEAT PLANTS AT LOW TEMPERATURES

1931 ◽  
Vol 5 (3) ◽  
pp. 337-354 ◽  
Author(s):  
R. Newton ◽  
J. A. Anderson
Keyword(s):  
Winter Wheat ◽  
Low Temperatures ◽  
Respiratory Activity ◽  
Freezing Point ◽  
Frost Damage ◽  
Wheat Varieties ◽  
Relationship Of ◽  
Winter Wheat Varieties ◽  
Better Than ◽  
Hardened Condition

Respiration measurements at −7°, 0° and 7 °C. with four winter wheat varieties and two spring wheat varieties grown in the field, were carried on during the fall and early winter of four years. The rate of respiration in winter wheat decreased as the plants hardened. At the outset all varieties respired about alike. After hardening began, the rates at −7 °C. were in the inverse order of hardiness, with the spring wheats faster than the least hardy winter wheat. As hardening progressed, the differentiation of the winter varieties at −7 °C. became sharper, and could be observed also at 0 °C., but at 7 °C. very little if any relationship of this sort developed. The spring varieties, because of frost damage, could not be compared with winter varieties in the fully hardened condition, but their behavior early in the season confirms the general conclusion that at the freezing point or lower temperatures respiratory activity is inversely related to winter hardiness. This accounts for the observed fact that hardy varieties maintain their sugar reserves better than non-hardy varieties during the winter.

scholarly journals A comparative study of winter wheat varieties with especial reference to winter-killing

1922 ◽  
Vol 12 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Robert Newton
Keyword(s):  
Winter Wheat ◽  
Dry Matter ◽  
Freezing Point ◽  
Specific Conductivity ◽  
Hydrogen Ion ◽  
Ion Concentration ◽  
Wheat Varieties ◽  
Hydrogen Ion Concentration ◽  
Winter Wheat Varieties ◽  
Hardened Condition

1. A number of varieties of winter wheat, known to vary considerably in degree of winter hardiness, were compared in the hardened condition with reference to the physical constants of the cell sap, and the content of dry matter, nitrogen, sugars and starch.2. No constant relation was found between depression of the freezing point, specific conductivity, or hydrogen-ion concentration of the cell sap and relative frost hardiness.3. Sugars accounted for 34 to 38 per cent, of the total osmotic pressure of the sap.

ADAPTABILITY OF WINTER WHEAT VARIETIES BASED ON THEIR GRAIN YIELD RESULTS

2000 ◽  
Vol 48 (2) ◽  
pp. 203-207 ◽  
Author(s):  
C. Kondora ◽  
M. Szabó ◽  
G. Szabó ◽  
A. Máté
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Evaluation Method ◽  
Wheat Varieties ◽  
Ecological Adaptability ◽  
Significant Difference ◽  
Small Plot ◽  
High Yielding Varieties ◽  
Winter Wheat Varieties ◽  
Better Than

There is a significant difference in the adaptability of qualified varieties. To determine which varieties can be grown profitably at different locations, it is necessary to know the characteristics and the ecological adaptability of the varieties. The present study was conducted to analyse the adaptability of 40 state-registered winter wheat varieties tested in small-plot comparative trials by the National Institute for Agricultural Quality Control based on their grain yield results. For the comparison of the varieties the evaluation method of Eberhart and Russell (1966) improved by Bed ő and Balla (1977) was applied. According to this method the varieties can be divided into three groups. Varieties with special adaptability include intensive high-yielding varieties, the genetic potential of which, owing to their weak stress tolerance, can be exploited only at locations with better than average characteristics. The yield stability of winter wheat varieties with average adaptability is good. Their grain yield is generally close to the site average, but under more favourable circumstances it exceeds the average at most sites. Varieties with good adaptability usually have low genetic yielding capacity, but can adapt to extensive circumstances better than the intensive varieties.

QUALITATIVE STABILITY OF WINTER WHEAT VARIETIES AT DIFFERENT LOCATIONS

2000 ◽  
Vol 48 (2) ◽  
pp. 191-195
Author(s):  
C. Kondora ◽  
M. Szabó ◽  
A. Máté ◽  
G. Szabó
Keyword(s):  
Quality Control ◽  
Winter Wheat ◽  
Evaluation Method ◽  
Wheat Varieties ◽  
Local Conditions ◽  
Grain Yields ◽  
Baking Quality ◽  
Small Plot ◽  
High Yielding Varieties ◽  
Winter Wheat Varieties

Owing to the significant differences in the adaptability of state-registered varieties, those which can adapt well to the local conditions should be given preference. There are several high-yielding varieties available in Hungary with excellent agronomic properties, good adaptability and satisfactory baking quality. This study was conducted to analyse the adaptability of 34 state-registered winter wheat varieties tested in the small plot trials of the National Institute for Agricultural Quality Control (NIAQC) at 5–9 locations between 1994 and 1997 based on their gluten quantity and farinographic index. For the comparison of the varieties the evaluation method of Eberhart and Russell (1966) was applied as modified by Bedő and Balla (1977). The qualitative stability and adaptability values of the varieties differ from the adaptability and stability values calculated from the grain yields. Some winter wheat varieties have good qualitative adaptability and stability, while others have special adaptability and poor qualitative stability, but the majority of the varieties do not belong to these groups.

Impact of the estimated doses of mineral fertilizers on the infestation mildew, pyrenophora and yield of winter wheat varieties

2020 ◽  
Author(s):  
A.Y. Ozheredova ◽  
◽  
A. N. Esaulko ◽  
L.A. Mikhno ◽  
A.P. Shutko ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Winter Wheat ◽  
Mineral Fertilizers ◽  
Wheat Varieties ◽  
Leached Chernozem ◽  
Winter Wheat Varieties

The article presents materials on the influence of calculated doses of mineral fertilizers on the incidence of powdery mildew, pyrenophorosis and yield of winter wheat varieties cultivated on leached Chernozem for 2016-2018.

Varietal potential of winter wheat in the Kursk region

2020 ◽  
Author(s):  
Pigorev I. Ya. Pigorev I. Ya. ◽  
◽  
V.A. Kudinov V.A. ◽  
I.V. Ichkov I.V.
Keyword(s):  
Small Business ◽  
Winter Wheat ◽  
Industrial Complex ◽  
Wheat Varieties ◽  
Business Entities ◽  
Kursk Region ◽  
Winter Wheat Varieties ◽  
Large Enterprises

the range of winter wheat varieties in the conditions of sown areas of the Kursk region is considered. The analysis of the varieties used with the priorities and volumes of crops in large enterprises and small business entities of the agro-industrial complex is given.

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