Pre-Anthesis Nutritional Status of Spelt Wheat as a Tool for Predicting the Attainable Grain Yield

The nutrient content in leaves of spelt wheat at late heading is crucial for the development of its yield components, and in consequence, grain yield. This hypothesis was verified based on data from long-term field experiments with four potassium (K) treatments based on the progressive K supply potential to plants from soil and fertilizer and two magnesium treatments (−Mg, +Mg). The number of ears (NE) and the number of grains per ear (NGE) responded significantly to the increased K and Mg supply. The grain yield was positively correlated with NGE. A shortage of N and Mg resulted in a lower NGE, whereas a shortage of N and Zn, concomitant with an excess of Ca, resulted in a significant decrease in NGE and thousand-grain weight. This effect can be diminished by the increased content of Mg. It has been revealed that the content of Zn in leaves of spelt wheat at heading is an important nutritional factor effectively controlling N, P and Fe contents in grain, and consequently, grain yield. This study showed that the content of nutrients in spelt leaves measured just before anthesis can be used for reliable prediction of the grain yield.

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Drought response of modern and old oat lines in greenhouse and long-term field trials

Agricultural and Food Science ◽

10.23986/afsci.72783 ◽

1997 ◽

Vol 6 (2) ◽

pp. 199-205 ◽

Cited By ~ 2

Author(s):

Pirjo Mäkelä ◽

Leena Väärälä ◽

Riikka Rajalahti ◽

Ari Rajala ◽

Pirjo Peltonen-Sainio

Keyword(s):

Grain Yield ◽

Field Experiments ◽

Field Trials ◽

Drought Response ◽

Wild Oat ◽

Greenhouse Experiments ◽

Plant Breeding Institute ◽

The University ◽

Term Field

This study compares the response of old and modern oat (Avena sutiva L.) lines to pre-anthesis precipitation in long-term field trials, and to pre- and post-anthesis drought in the greenhouse. Long-term field trials were carried out at the Experimental Farms of Hankkija Plant Breeding Institute and the University of Helsinki between 1965 and 1988. Grain yield of 12 oat lines (released since 1959) was compared with that of the check lines. The effect of differences in May-June precipitation on grain yield was established for different lines. Greenhouse experiments included 19 oat lines (released since 1921) and three wild species of oat (A. barbata L., A. sterilis max. L. and A. fatua L.). The data from greenhouse experiments were analysed using discriminant analysis in groups of old (released before 1970s), modern, and wild oat types. Ranking of the oat lines according to results from long-term field trials and greenhouse experiments was not consistent; contrary to the field experiments, the old lines tended to be the most drought sensitive when tested in the greenhouse. Therefore, the simple and non-laborious methods used in this study for ranking of drought sensitivity of oat lines are not recommended.

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Grain yield and crop N offtake in response to residual fertilizer N in long-term field experiments

Soil Use and Management ◽

10.1111/j.1475-2743.2010.00297.x ◽

2010 ◽

Vol 26 (4) ◽

pp. 455-464 ◽

Cited By ~ 14

Author(s):

J. Petersen ◽

I. K. Thomsen ◽

L. Mattsson ◽

E. M. Hansen ◽

B. T. Christensen

Keyword(s):

Grain Yield ◽

Field Experiments ◽

Fertilizer N ◽

Residual Fertilizer N ◽

Term Field

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PLANNING LENGTH OF LONG -TERM FIELD EXPERIMENTS THROUGH DECISION SUPPORT SYSTEMS – A CASE STUDY

Applied Ecology and Environmental Research ◽

10.15666/aeer/0602_6378 ◽

2008 ◽

Vol 6 (2) ◽

pp. 63-78 ◽

Cited By ~ 3

Author(s):

R Kaur

Keyword(s):

Decision Support ◽

Decision Support Systems ◽

Field Experiments ◽

Support Systems ◽

Term Field

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Critical plant phosphorus for winter wheat assessed from long-term field experiments

European Journal of Agronomy ◽

10.1016/j.eja.2021.126263 ◽

2021 ◽

Vol 126 ◽

pp. 126263

Author(s):

Mario Fontana ◽

Gilles Bélanger ◽

Juliane Hirte ◽

Noura Ziadi ◽

Saïd Elfouki ◽

...

Keyword(s):

Winter Wheat ◽

Field Experiments ◽

Term Field

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Competition Effects and Productivity in Oat–Forage Legume Relay Intercropping Systems under Organic Farming Conditions

Agriculture ◽

10.3390/agriculture11020099 ◽

2021 ◽

Vol 11 (2) ◽

pp. 99

Author(s):

Viktorija Gecaitė ◽

Aušra Arlauskienė ◽

Jurgita Cesevičienė

Keyword(s):

Grain Yield ◽

Organic Farming ◽

Field Experiments ◽

Plant Competition ◽

Nutrient Content ◽

Forage Legume ◽

Forage Legumes ◽

Medicago Lupulina ◽

Competition Effects ◽

Productivity Indicators

Cereal-legume intercropping is important in many low-input agricultural systems. Interactions between combinations of different plant species vary widely. Field experiments were conducted to determine yield formation regularities and plant competition effects of oat (Avena sativa L.)–black medick (Medicago lupulina L.), oat–white clover (Trifolium repens L.), and oat–Egyptian clover (T. alexandrinum L.) under organic farming conditions. Oats and forage legumes were grown in mono- and intercrops. Aboveground dry matter (DM) measured at flowering, development of fruit and ripened grain, productivity indicators, oat grain yield and nutrient content were established. The results showed that oats dominated in the intercropping systems. Oat competitive performance (CPo), which is characterized by forage legumes aboveground mass reduction compared to monocrops, were 91.4–98.9. As the oats ripened, its competitiveness tendency to declined. In oat–forage legume intercropping systems, the mass of weeds was significantly lower compared to the legume monocrops. Oats and forage legumes competed for P, but N and K accumulation in biomass was not significantly affected. We concluded that, in relay intercrop, under favourable conditions, the forage legumes easily adapted to the growth rhythm and intensity of oats and does not adverse effect on their grain yield.

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