Wheat growth responses to soil mechanical impedance are dependent on phosphorus supply

Wang, Xin; Shen, Jianbo; Hedden, Peter; Phillips, Andrew L.; Thomas, Stephen G.; Ge, Yaoxiang; Ashton, R. W.; Whalley, W. R.

doi:10.1016/j.still.2020.104754

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…These findings open up new possibilities for managing crop growth (tillering/branching) under high soil strength. Interestingly other recent laboratory work has shown that reduced tillering of wheat under high soil strength is observed under higher (250 μm) but not lower (10 μm) phosphorus supply (Wang et al 2021). Low phosphorus supply is generally thought to stimulate strigolactone production and exudation in roots and result in arbuscular mycorrhizal branching and the increased uptake of phosphorus (Bouwmeester et al 2007), as well as reduced tillering (Umehara et al 2010).…”

Section: Rooting Depth Macropores and Bioporesmentioning

confidence: 99%

“…One of the interesting observations from reading the literature is that interactions between tillage and fertiliser or ameliorant treatments in field experiments are rare (see Armstrong et al 2015;Bowden 1986;Hall et al 2020;Hamza and Anderson 2003;Jarvis 1986;Radford et al 2001), although examples from laboratory experiments are emerging (Wang et al 2021). Generally, the effects of ripping appear to be additive to those from fertiliser or ameliorants.…”

Section: Deep Tillage To Reduce Soil Strength and Increase Crop Growthmentioning

confidence: 99%

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New insights into high soil strength and crop plants; implications for grain crop production in the Australian environment

Unkovich

McKenzie²,

Parker³

2023

Plant Soil

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High soil strength is a problem in grain production systems worldwide. It is most severe in deep sands where the high strength occurs at greater depth, and is therefore more difficult to remedy. High strength is not an intrinsic soil physical property but the outcome of abiotic, biotic, climatic and management factors. Consequently, soil strength needs to be measured in situ with a penetrometer which, despite imperfections, provides approximate benchmarks. Following examination of laboratory, glasshouse and field literature, we hypothesise that the primary effect of high soil strength on crops is a reduction in tillering or branching, resulting in reduced radiation interception, crop transpiration and grain density (grains m− 2). This effect appears to be manifest via strigolactone hormones. While deep tillage allows deeper root growth and access to more water in deep soil layers, we contend that it is the direct effects of hormones on shoot development which has the largest effect on yield. The development of high soil strength cropping environments is not simply a function of soil properties and increased machinery mass and traffic frequency, it arises from a confluence of these with the farming system, the climate and perhaps plant breeding activities. An improved understanding of the relative importance of the unintended consequences of breeding, the effects of changes in fallowing practices, crop rotation, soil fertility, climate and traffic, along with a better understanding of the possible importance of bio- and macropores types provide avenues for improved management of high soil strength in grain crop production systems.

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Section: Rooting Depth Macropores and Bioporesmentioning

confidence: 99%

Section: Deep Tillage To Reduce Soil Strength and Increase Crop Growthmentioning

confidence: 99%

New insights into high soil strength and crop plants; implications for grain crop production in the Australian environment

Unkovich

McKenzie²,

Parker³

2023

Plant Soil

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“…A plant's root system must supply enough nutrients and moisture for crop growth, as well as serve as a means of anchoring it in the soil [7]. Poor aeration, water absorption and infiltration, or a combination of these elements with the weather, have a major effect in deciding crop yields [8].…”

Section: Introductionmentioning

confidence: 99%

Soil Properties and Maize Growth as Affected by Subsoiling and Traffic-Induced Compaction

Ramadhan,

Alfaris

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Many of the current farm management methods that utilize production techniques tend to add to the soil compaction problem. The compaction from wheel traffic is a key source of soil deterioration in contemporary agriculture. Limited studies have been conducted over the heavy soil of Iraq’s southern regions to understand soil compaction under the current condition, and its effect on crop growth and yield. An experiment was conducted at two locations; with the goal of determining the effects of tractor traffic on soil parameters, plant development, and maize production. Compaction treatments included no traffic, t0; 8 tractor traffic, t8; 16 tractor traffic, t16; and 24 tractor traffic, t24. To reduce soil compaction’s negative impacts, two degrees of subsoiling have been investigated, nonsubsoiled (NonSub) and subsoiled (Sub) plots. The results showed that bulk density values through 10 to 40 cm soil profile after tractor traffic at both locations increased with increasing levels of compaction. Hydraulic conductivity of saturated soil cores showed a general trend of decreasing at both locations with increasing levels of compaction by tractor traffic. Maize plant height, 500-grain weight, and root mass throughout both growing locations were also lower with wheel traffic treatments compared to the control treatment. Maize yields with wheel traffic were significantly lower by 7.039, 19.120, 34.187% at the first location and by 7.291, 15.147, 26.862% at the second location for the t8, t16, and t24 than yields with the t0 treatments. On the other hand, subsoiling was found to mitigate the adverse effect of tractor traffic in the topsoil and in the subsoil that led to a favour effect on soil bulk density and saturated hydraulic conductivity. The subsoil treatment increased plant height at both growing locations due to the greater exploitation of root system at the subsoiled plots which increased 500 grain weight and eventually maize yield by 16.215 and 23.762% over nonsubsoiled treatment. Tractor traffic on agricultural soils must be planned in order to minimize its detrimental impacts, as demonstrated by the findings of this experiment. Tractor traffic below 16 passes, under the experiment condition, is convenient for effective maize cultivation. In addition, subsoiling can be a choice for alleviating compaction.

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“…Furthermore, it is important to stress the existence of a feedback mechanism where, for instance, soil fertility affects the plant's response to soil compaction. For example, wheat growth in response to physical impairment in the soil is dependent on the availability of P [52].…”

Section: Introductionmentioning

confidence: 99%

Critical Limits for Soybean and Black Bean Root Growth, Based on Macroporosity and Penetrability, for Soils with Distinct Texture and Management Systems

et al. 2022

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Soil compaction is a worldwide problem in agricultural areas, and it is important to define soil properties and reference values that allow knowledge of the compaction level for decision making. The objective of this study was to define the critical values of physical properties associated with the compaction of soils. Three Ultisols and two Oxisols, under different management systems, were collected at different depths for an evaluation of particle size, volumetric moisture, bulk density, and porosity. In the field, soil resistance to penetration and the root length of the soybean and edible black bean crop were measured. The soil profiles presented horizontal layers with similar resistance, but in some cases, there is discontinuity of these layers, which allows the roots to use the zones of lower resistance to deepen in the profile. The values of bulk density and resistance to penetration critical to soybean and edible black bean (only in sandy loam soil) root growth, according to soil textural class, are: sandy loam = 1.66 Mg m−3 and 1.5 to 2 MPa; loam and clay loam = 1.52 Mg m−3 and 1 to 1.5 MPa; silty clay loam and silty clay = 1.32 Mg m−3 and 1.5 to 2 MPa; and clay = 1.33 to 1.36 Mg m−3 and 2 to 3.5 MPa.

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Wheat growth responses to soil mechanical impedance are dependent on phosphorus supply

Cited by 9 publications

References 42 publications

New insights into high soil strength and crop plants; implications for grain crop production in the Australian environment

New insights into high soil strength and crop plants; implications for grain crop production in the Australian environment

Soil Properties and Maize Growth as Affected by Subsoiling and Traffic-Induced Compaction

Critical Limits for Soybean and Black Bean Root Growth, Based on Macroporosity and Penetrability, for Soils with Distinct Texture and Management Systems

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