Field emergence dynamics significance to intraspecific competition and growth efficiency in sugar beet (Beta vulgaris L.)

Stibbe, Carsten; Märländer, Bernward

doi:10.1016/s1161-0301(02)00005-9

Cited by 17 publications

(13 citation statements)

References 17 publications

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“…Nutrient foraging capacity of roots determines plant performance under both heterogeneous soil nutrient availability and belowground competition with neighbors (Stibbe and Märländer, 2002; Soleymani et al 2011; Bennett et al 2016; Reiss and Drinkwater, 2018). Given that nutrient foraging by roots is an active process (Zhang et al 2019), it is very likely that plant biomass allocation and root system responses will be driven by the nutrient which is limiting plant growth the most (Poorter et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Kumar

Duijnen

Delory

et al. 2020

Preprint

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1 Background and Aims Plants respond to various environmental stimuli, and root systems 2 are highly responsive to the availability and distribution of nutrients in the soil. Root system 3 responses to the limitation of either nitrogen (N) or phosphorus (P) are well documented, 4 but how the early root system responds to (co-) limitation of one (N or P) or both (N and 5 P) in a stoichiometric framework is not well known despite its relevance in agriculture. In 6 addition, how plant-plant competition (here intra-specific) alters plant responses to N:P 7 stoichiometry is understudied. Therefore, we aimed to investigate the effects of N:P 8 stoichiometry and competition on root system responses and overall plant performance. 9  Methods Plants (Hordeum vulgare L.) were grown in rhizoboxes for 24 days in the 10 presence or absence of competition (three vs. one plant per rhizobox), and fertilized with 11 different combinations of N:P (low N+low P, low N+high P, high N+low P, and high 12 N+high P). 13 Key Results Shoot biomass was highest when both N and P were provided in high 14 amounts. In competition, shoot biomass decreased on average by 22%. Interestingly, N:P 15 stoichiometry and competition had no clear effect on root biomass. However, we found 16 distinct root responses in relation to biomass allocation across depths. Specific root length 17 depended on the identity of limiting nutrient (N or P) and presence/absence of competition. 18 Plants rooted deeper when N was the most limiting compared to shallower rooting when P 19 was the most limiting nutrient. 20  Conclusions Overall, our study sheds light on the early plant responses to plant-plant 21 competition and stoichiometric availability of two macronutrients most limiting plant 22 performance. With low N and P availability during early growth, higher investments in 23 root system development can significantly trade off with aboveground productivity, and 24 strong intra-specific competition can further strengthen such effects. 25 Keywords: Root system responses, vertical root distribution, specific root length, nutrient 26 stoichiometry, intraspecific competition 27

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Section: Introductionmentioning

confidence: 99%

Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Kumar

Duijnen

Delory

et al. 2020

Preprint

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“…Differences in root yield of seeds with varying vigour are not determined by plant emergence ability, but result from the differences in emergence time and uniformity. These differences tend to diminish later during crop development, but as research has shown, their effect lasts until harvest (Stibbe and Märländer 2002). The impact of low uniformity of emergence is the most significant in the case of vegetable crops, where marketable yield is more important than biological yield (TeKrony and Egli 1991; Finch-Sawage and Bassel 2016).…”

Section: Discussionmentioning

confidence: 99%

“…The earlier studies indicated that the order of emergence measured by the number of days from the date of sowing until the day of emergence had an enormous influence on plant characteristics (Dürr et al 1992;Stibbe and Märländer 2002). Sugar beets that emerged first, after 1 month of growth, had a 2.1-9.6 times higher dry matter weight compared to the plants that emerged at the end of the emergence period.…”

Section: Introductionmentioning

confidence: 99%

“…The time of emergence was the strongest factor influencing plant weight during harvest in comparison with other factors, such as mean distance to the neighbours in the row and the average weight of the neighbours. Relative growth rate (RGR) was not affected by different dates of emergence (Dürr et al 1992;Stibbe and Märländer 2002). A constant RGR of plants that emerged late indicated that they are not able to compensate for their shorter vegetation period and accordingly will always contribute less to the dry matter yield of the crop than the plants that emerged early.…”

Section: Introductionmentioning

confidence: 99%

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Various Methods of Assessing Sugar Beet Seed Vigour and Its Impact on the Germination Process, Field Emergence and Sugar Yield

Podlaski

Chomontowski

2019

Sugar Tech

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During 2012-2015, the seed vigour of 54 commercial sugar beet varieties was evaluated. In addition, correlations among different methods of determining seed vigour and the potential impact of low vigour on the quality traits of seeds and root yield were investigated. The chosen seed vigour indicators were field emergence (early and final count), emergence course in a phytotron under controlled conditions (early and final count, mean time of emergence, emergence uniformity) and germination ability under stress conditions regarding substrate moisture and air temperature. The most effective vigour indicators were field and phytotron emergence (early count), mean time of emergence and germination ability under stress conditions. Final field and phytotron emergence constituted weak indicators of seed vigour. Low seed vigour decreased root yield by 3.2 t/ha (4.8%) compared to high seed vigour. Lower yields were caused by slower and less uniform field emergence.

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“…Seedling vigor is a complex combination of traits that results in rapid germination, good field emergence, and the uniformity of stands (Stibbe and Märländer, 2002). With an adequate number of beets distributed uniformly, it is possible to optimize light interception by the canopy, and to reduce both the development of weeds and losses occurring at harvest due to irregular size and varied height of beets as they protrude above the soil surface (Snyder, 1963).…”

Section: Methods Of Seed Productionmentioning

confidence: 99%

Root and Tuber Crops

Bradshaw¹

2010

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Field emergence dynamics significance to intraspecific competition and growth efficiency in sugar beet (Beta vulgaris L.)

Cited by 17 publications

References 17 publications

Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

Various Methods of Assessing Sugar Beet Seed Vigour and Its Impact on the Germination Process, Field Emergence and Sugar Yield

Root and Tuber Crops

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