Temporal variation and spatial distribution of the root systemof corn in a soil profile

Liu, Jingmiao; Sinclair, A. N.; Liao, Rongwei; SanXue, Ren; Liang, Hong

doi:10.3724/sp.j.1011.2009.00517

Cited by 15 publications

(6 citation statements)

References 4 publications

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“…Other than C m , results show that among all the meteorological and agricultural explanatory variables considered (see Methods), precipitation ( P ), fertilizer use rate ( F ) and crop type ( c ) are most significant in influencing the soil moisture at the three soil depths considered. Here we take the 20–50 cm soil layer, which comprises a large portion of root zone 28 29 and is directly affected by transpiration, to illustrate the correlated effects of declining soil moisture. The analysis yields slopes of 4.1 × 10 −4 (m 3 m −3 mm −1 yr), −3.0 × 10 −4 (m 3 m −3 kg −1 ha yr), −0.013 and −0.026, for P , F , crop group 2 (i.e., c 2, wheat) and group 3 (i.e., c 3, maize and rapeseed), respectively – see model (1) in Methods.…”

Section: Resultsmentioning

confidence: 99%

Agriculture intensifies soil moisture decline in Northern China

Liu

Pan

Zhuang

et al. 2015

Sci Rep

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Northern China is one of the most densely populated regions in the world. Agricultural activities have intensified since the 1980s to provide food security to the country. However, this intensification has likely contributed to an increasing scarcity in water resources, which may in turn be endangering food security. Based on in-situ measurements of soil moisture collected in agricultural plots during 1983–2012, we find that topsoil (0–50 cm) volumetric water content during the growing season has declined significantly (p < 0.01), with a trend of −0.011 to −0.015 m3 m−3 per decade. Observed discharge declines for the three large river basins are consistent with the effects of agricultural intensification, although other factors (e.g. dam constructions) likely have contributed to these trends. Practices like fertilizer application have favoured biomass growth and increased transpiration rates, thus reducing available soil water. In addition, the rapid proliferation of water-expensive crops (e.g., maize) and the expansion of the area dedicated to food production have also contributed to soil drying. Adoption of alternative agricultural practices that can meet the immediate food demand without compromising future water resources seem critical for the sustainability of the food production system.

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Section: Resultsmentioning

confidence: 99%

Agriculture intensifies soil moisture decline in Northern China

Liu

Pan

Zhuang

et al. 2015

Sci Rep

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“…Summer maize has a fibrous root system that is divided into three categories: primary root, secondary root, and aerial root ). Previous studies indicated that the vast majority of summer maize roots grow in the upper 40 cm of soil (Yi et al, 2009;Liu et al, 2009). Root biomass reaches its maximum at tasseling, pin silk, or milk stages (Yi et al, 2009), and the rooting depth development can be described as a sine function with time (Borg and Grimes, 1986).…”

Section: Relationship Between Root Distribution and Water Uptakementioning

confidence: 99%

Using stable isotopes to determine seasonal variations in water uptake of summer maize under different fertilization treatments

Song

2016

Science of The Total Environment

100

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“…Furthermore, Haden et al [28] have reported that roots are the main contributor to SOC formation. Based on Hou et al [59] and Liu et al [60], the roots of wheat and maize are mainly concentrated in the 0-0.2 m soil layer, while for potato, roots are mainly located in the 0-0.1 m soil layer [61]. These differences in the rooting depth patterns among the studied crop types could affect the various vertical placements of SOC within the soil profile [62].…”

Section: Effects Of Different Rotation Patterns On Soc and Soil Phmentioning

confidence: 99%

A Comparative Study of Rotation Patterns on Soil Organic Carbon in China’s Arid and Semi-Arid Regions

et al. 2020

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The practice of crop rotation can significantly impact carbon sequestration potential. In exploring whether crop rotation has the potential to improve soil carbon sequestration in China’s Loess Plateau, soil organic carbon (SOC), soil water content (SWC), soil bulk density (SBD), and soil pH were compared across the 0–1.0 m soil profile, under four crop rotation patterns: lentil–wheat–maize, wheat–potato–lentil, wheat–maize–potato, and wheat–flax–pea. The lentil–wheat–maize and wheat–maize–potato rotations have been practiced over the past 20 years, while the wheat–potato–lentil and wheat–flax–pea rotations were established in 1978 (~40 year rotations). The results showed that under the 20-year lentil–wheat–maize rotation, SOC was not significantly different to that of the wheat–maize–potato rotation, at 6.81 g kg−1 and 6.91 g kg−1, respectively. However, under the lentil–wheat–maize rotation, SWC (9.81%) and SBD (1.19 Mg m−3) were significantly higher, but soil pH (8.42) was significantly lower than the same metrics under wheat–maize–potato rotation (8.43% and 1.16 Mg m−3, and 8.50, respectively). For the 40-year rotations, SWC (9.19%) and soil pH (8.41) under the wheat–potato–lentil were not significantly different to that of the wheat–flax–pea (8.87%, and 8.40, respectively). SOC (6.06 g kg−1) was significantly lower, but SBD (1.18 Mg m−3) was significantly higher under the wheat–potato–lentil than the wheat–flax–pea (7.29 g kg−1, and 1.15 Mg m−3, respectively) rotations. Soil carbon sequestration for the lentil–wheat–maize and wheat–potato–lentil rotations was co-influenced by SWC, SBD, and soil pH, while for wheat–maize–potato and wheat–flax–pea rotations, it was co-influenced by SWC and soil pH. The economic value of the four studied crops is, in order: potato > maize > wheat > flax. The results of the present study suggest that the lentil–wheat–maize and maize–flax–pea rotations are the most suitable patterns to optimize simultaneous economic and ecological development of the study area.

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Temporal variation and spatial distribution of the root systemof corn in a soil profile

Cited by 15 publications

References 4 publications

Agriculture intensifies soil moisture decline in Northern China

Agriculture intensifies soil moisture decline in Northern China

Using stable isotopes to determine seasonal variations in water uptake of summer maize under different fertilization treatments

A Comparative Study of Rotation Patterns on Soil Organic Carbon in China’s Arid and Semi-Arid Regions

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