Regulation of maize growth, nutrient accumulation and remobilization in relation to yield formation under strip-till system

Sha, Ye; Hao, Zhanhong; Liu, Zheng; Huang, Yiwen; Feng, Guorui; Chen, Fanjun; Mi, Guohua

doi:10.1080/03650340.2023.2169281

Cited by 2 publications

(3 citation statements)

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“…Relationship between root characteristics and yield formation of maize in ST system Low soil temperature can limit nutrient uptake and therefore shoot growth by affecting root growth and soil nutrient availability (Miedema, 1982). Previously it is found that, compared to CT plants, ST plants signi cantly reduces nutrients (nitrogen, phosphorus) accumulation and dry matter accumulation at vegetative growth stage (Sha et al, 2023). In accordance, the current study showed that ST plants had a smaller total root length and root biomass at early growth stage, but the root-shoot ratio remained the same level as CT plants (Table 3).…”

Section: Discussionmentioning

confidence: 99%

“…Compared with conventional tillage (CT), NT reduces soil erosion and increases soil water content, but reduces soil temperature and increase soil bulk density (Cannell, 1985;Dwyer et al, 1996;Munkholm et al, 2012; Muñoz-Romero et al, 2012; Soane et al, 2012), although long-term NT may reduce soil bulk density (Fiorini et al, 2018). To reduce the disadvantageous effect of CT on soil temperature, strip-till (ST) is gradually developed as a major form of conservative tillage for maize production (Morrison, 2002;Licht and Al-Kaisi, 2005a;Trevini et al, 2013;Fernández et al, 2015;Sha et al, 2023). ST combines the bene ts of CT and NT by cultivating the intra-row soil to form a planting strip and leaving the inter-row covered with residue through the whole maize growth stage (Vyn and Raimbault, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…In other words, leaf function at this stage is very important for maintaining root function. It is found that the leaves of ST stay green longer than that of CT plants, suggesting leaf senescence is also delayed in ST plants during grain lling stage(Sha et al, 2023).It is well understood that plant root system architecture (RSA) is closely related to soil resource acquisition, and maize with steep, deeper RSA can increase water and nitrogen acquisition from the deeper soil(Mi et al, 2010;Lynch, 2013;Trachsel et al, 2013;Mi et al, 2016) Feng et al (2019). showed that deeper roots in maize contribute to e cient N uptake and maize grain yield.…”

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Root growth, root senescence and root system architecture in maize under conservative strip tillage system

Sha,

Liu,

Hao

et al. 2023

Plant Soil

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AimsA sound root system architecture (RSA) is important for e cient nutrient and water acquisition. The adaptation of root growth and RSA to the special soil structure under conservative strip tillage (ST) system is largely unknown. MethodsWe describe three-year eld experimentation on a meadow black soil in the Northeast China to investigate the RSA and the dynamic root growth of maize under ST by comparison with the conventional tillage (CT). ResultsGrain yield in ST and CT were not signi cantly different, but their yield components differed. Compared to CT, grain number per ear was reduced by 4.4%, while 1000-grain weight was increased by 6.6% in ST. Root growth in ST plants was inhibited in the vegetative stage, as indicated by the reduced total root length (by 27.7-40.1%) compared to CT. During post-silking stage, however, the total root length was not different between ST and CT plants. Accordingly, the root xylem bleeding rate in ST plants was 70.7%-449.9% greater than CT plants. Because ST practice caused uneven horizontal distribution of soil bulk density, the RSA became steeper in ST plants compared to CT. Moreover, the D 95 of ST plant roots was greater, indicating their roots grew deeper. ConclusionsIn conclusion, although root growth is inhibited at vegetative stage, the slow-aging and steep, deep roots in ST plants may contribute to larger grain weight by favoring water and nutrient acquisition during grain lling stage. As a result, grain yield of ST plants is maintained though grain number per ear is reduced.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Root growth, root senescence and root system architecture in maize under conservative strip tillage system

Sha,

Liu,

Hao

et al. 2023

Plant Soil

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Root growth, root senescence and root system architecture in maize under conservative strip tillage system

Sha

Liu²,

Hao³

et al. 2023

Preprint

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Aims A sound root system architecture (RSA) is important for efficient nutrient and water acquisition. The adaptation of root growth and RSA to the special soil structure under conservative strip tillage (ST) system is largely unknown. Methods We describe three-year field experimentation on a meadow black soil in the Northeast China to investigate the RSA and the dynamic root growth of maize under ST by comparison with the conventional tillage (CT). Results Grain yield in ST and CT were not significantly different, but their yield components differed. Compared to CT, grain number per ear was reduced by 4.4%, while 1000-grain weight was increased by 6.6% in ST. Root growth in ST plants was inhibited in the vegetative stage, as indicated by the reduced total root length (by 27.7-40.1%) compared to CT. During post-silking stage, however, the total root length was not different between ST and CT plants. Accordingly, the root xylem bleeding rate in ST plants was 70.7%-449.9% greater than CT plants. Because ST practice caused uneven horizontal distribution of soil bulk density, the RSA became steeper in ST plants compared to CT. Moreover, the D95 of ST plant roots was greater, indicating their roots grew deeper. Conclusions In conclusion, although root growth is inhibited at vegetative stage, the slow-aging and steep, deep roots in ST plants may contribute to larger grain weight by favoring water and nutrient acquisition during grain filling stage. As a result, grain yield of ST plants is maintained though grain number per ear is reduced.

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Regulation of maize growth, nutrient accumulation and remobilization in relation to yield formation under strip-till system

Cited by 2 publications

References 57 publications

Root growth, root senescence and root system architecture in maize under conservative strip tillage system

Root growth, root senescence and root system architecture in maize under conservative strip tillage system

Root growth, root senescence and root system architecture in maize under conservative strip tillage system

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