Effect of crop rotational position and nitrogen supply on root development and yield formation of winter wheat

被引:4
|
作者
Arnhold, Jessica [1 ]
Grunwald, Dennis [1 ]
Braun-Kiewnick, Andrea [2 ]
Koch, Heinz-Josef [1 ]
机构
[1] Inst Sugar Beet Res, Dept Agron, Gottingen, Germany
[2] Julius Kuhn Inst, Fed Res Ctr Cultivated Plants, Inst Epidemiol & Pathogen Diagnost, Braunschweig, Germany
来源
关键词
root length density; grain yield; nitrogen uptake; biomass; oilseed rape; take-all disease; N-FERTILIZATION; TAKE-ALL; GROWTH; PATTERNS; SYSTEMS;
D O I
10.3389/fpls.2023.1265994
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The lower yield of wheat grown after wheat (second wheat) compared with the first wheat after a break crop is frequently attributed to fungal disease occurrence, but has also been found without visible disease infection; thus, other factors might be responsible for the lower yield of the second wheat. The aims of this study were to analyze the effects of growing wheat as first and second wheat after oilseed rape, as well as monoculture in a long-term field experiment over three years on (i) aboveground biomass formation, root development and nutrient acquisition during the growing season, (ii) take-all occurrence, and (iii) grain yield and yield components. Subsoil root length density of winter wheat was significantly higher after oilseed rape as pre-crop than after wheat, which was independent of take-all occurrence. Differences in wheat aboveground biomass occurred at early growth stages and were persistent until harvest. Grain yield loss correlated well with take-all disease severity in a wet year but yield differences among crop rotational positions occurred also in a dry year without visible fungal infection. Thus, an effect of the crop rotational position of wheat beyond take-all disease pressure can be assumed. Overall, wheat root length density might be the key to understand wheat biomass formation and grain yield in different crop rotational positions.
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页数:10
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