Comparison of Single Large Broadcast and Small Annual Seed-Placed Phosphorus Treatments on Yield and Phosphorus and Zinc Contents of Wheat on Chernozemic Soils

Wagar, B. I.; Stewart, John; Henry, J. L.

doi:10.4141/cjss86-026

Cited by 14 publications

(11 citation statements)

References 19 publications

(2 reference statements)

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“…This lack of P practice × location × year interaction, both with and without tillage, for yield, and for all P concentration and content variables, confirms that maintenance of high soil test P for corn is not likely to be economically justified for the 40.0 to 43.0° latitude range for elevations of < 1000 m asl. The value of maintaining high STP may be greater for higher latitudes (Wagar et al, 1986;Randall, 2009), and maybe for higher elevations.…”

Section: Discussionmentioning

confidence: 99%

High Soil Test Phosphorus Effect on Corn Yield

Wortmann

Shapiro

Shaver

et al. 2018

Soil Science Soc of Amer J

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Phosphorus removal in crop harvest has increased as yields have increased. Fertilizer P use guidelines are based on calibrations often developed for much lower yield levels and may need recalibration. Corn yields may be greater with higher than recommended soil test P when springs are relatively wet and cool. Research was conducted across 12 irrigated and five rainfed siteyears in Nebraska with initial Bray-1 P ≤ 11 mg kg-1 to evaluate P application strategies for yield and P uptake of continuous corn (Zea mays L.) with and without tillage. The fertilizer P treatments were maintained on the same plots and included: (i) no P applied (0P); (ii) P applied according to the university of Nebraska-Lincoln deficiency correction recommendation (uNL_P); (iii) P applied to replace P removed in the previous harvest (Replace_P); (iv) Bray-1 P increased and maintained at 25 mg kg-1 (Bray_25); and (v) Bray-1 P increased and maintained at 35 mg kg-1 (Bray_35). Interactions of P practice with other factors were not significant indicating consistency of P practice effects across varied climate conditions near planting and plant emergence. Grain yield was 9.3% and 0.89 Mg ha-1 more with the P-applied treatments compared with 0P. Grain yield was 3.3% more due to the additional 5.9 kg ha-1 yr-1 P applied with Replace_P compared with uNL_P. Grain yield did not differ for Replace-P, Bray_25, and Bray_35. Plant P uptake was on average linearly increased by 0.27 kg kg-1 P applied. Fertilizer P application for continuous corn should be by Replace_P.

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Section: Discussionmentioning

confidence: 99%

High Soil Test Phosphorus Effect on Corn Yield

Wortmann

Shapiro

Shaver

et al. 2018

Soil Science Soc of Amer J

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“…By placing fertiliser instead of incorporating it throughout the soil the available P is being put where the root system is going to grow hoping to ensure early plant P uptake and a more successful crop. Hence Wager et al (1986) found that P fertilizer application rates could be halved by placing fertiliser instead of incorporation because the applied P was more efficiently used. However, optimal fertiliser and cultivation methods depend on the initial soil P condition/ distribution (Randall and Hoeft 1988); this includes at the depth at which existing P is initially available within the soil (Heppell et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Use of a coupled soil-root-leaf model to optimise phosphate fertiliser use efficiency in barley

et al. 2016

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Aims Phosphorus (P) is an essential nutrient necessary for maintaining crop growth, however, it's often used inefficiently within agroecosystems, driving industry to find new ways to deliver P to crops sustainably. We aim to combine traditional soil and crop measurements with climate-driven mathematical models, to give insight into optimising the timing and placement of fertiliser applications. Methods The whole plant crop model combines an above-ground leaf model with an existing spatially explicit below-ground root-soil model to estimate plant P uptake and above ground dry mass. We let P-dependent photosynthesis estimate carbon (C) mass, which in conjunction with temperature sets the root-growth-rate. Results The addition of the leaf model achieved a better estimate of two sets of barley field trial data for plant P uptake, compared with just the root-soil model alone. Furthermore, discrete fertiliser placement increases plant P uptake by up to 10 % in comparison to incorporating fertiliser. Conclusions By capturing essential plant processes we are able to accurately simulate P and C use and water and P movement during a cropping season. The powerful combination of mechanistic modelling and experimental data allows physiological processes to be quantified accurately and Plant Soil (2016) useful agricultural predictions for site specific locations to be made.

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“…As the plant root system grows, it accesses more P from the bulk soil and less from a fertilizer band (Kalra and Soper, 1968). Lack of late‐season P supply on severely depleted soils may reduce maximum yield even with high rates of seed‐placed P (Wagar et al, 1986a). Some studies in wheat and corn indicate that foliar application of P may provide a benefit as a top‐up treatment if P uptake from seed‐placed P applications or from the soil is restricted because of moisture stress or low soil P level (Benbella and Paulsen, 1998a, 1998b; Girma et al, 2007; Green and Racz, 1999; Mosali et al, 2006).…”

Section: The 4r Package Of Management Practicesmentioning

confidence: 99%

“…In addition, the appropriate rate of application will be related to fertilizer placement and vice versa. Efficiency of use for low rates of P fertilizer is much greater with banded than broadcast fertilizers, so if low rates of P targeted to optimize yield are being used, band application is preferable (Bailey and Grant, 1990; Campbell et al, 1996a; Grant and Bailey, 1993; Karamanos et al, 2002; Wagar et al, 1986a; Wheatland Conservation Area, 2018). In contrast, if higher rates of fertilizer P are being used to build soil P, broadcast and banded applications may provide similar yields.…”

Section: The 4r Package Of Management Practicesmentioning

confidence: 99%

4R Management of Phosphorus Fertilizer in the Northern Great Plains

Grant

Flaten

2019

J of Env Quality

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Phosphorus (P) fertilizer has played a vital role in increasing the productivity of crop production in the northern Great Plains for approximately 100 years. Throughout this period, agricultural production practices have changed dramatically, while our knowledge of P behavior and beneficial management practices has improved. Some of the more recent and substantial changes in farming practices on the northern Great Plains include widespread adoption of reduced tillage systems, introduction of new crops and high‐yielding cultivars, intensification and extension of crop rotations, development of new fertilizer products, increased appreciation of the role of microbial interactions in P dynamics, and growing concern for the effects of P on water quality. As cropping systems, technology, and societal demands evolve over time, nutrient management practices must also evolve to address concerns and take advantage of emerging opportunities. Classic principles and new P fertilizer technologies and management practices must be integrated into packages of 4R practices that optimize crop yield and agronomic efficiency while minimizing negative environmental impact and conserving P resources. Although a wide range of products and practices can be combined for this approach, placing ammonium phosphate fertilizer in a band, in or near the seed‐row, at the time of seeding and at a rate that matches P removal by the crop generally provides the greatest P efficiency, long‐term sustainability, and environmental protection for small grain, oilseed, and pulse crop production in the northern Great Plains. Core Ideas 4R stewardship for P fertilization is vital for sustainable crop production. The most efficient sources of P fertilizer for this region are ammonium phosphates. Long‐term sustainable crop production requires P fertilizer rates that match crop removal. Banding P fertilizer in or near the seed‐row is agronomically and environmentally beneficial.

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Comparison of Single Large Broadcast and Small Annual Seed-Placed Phosphorus Treatments on Yield and Phosphorus and Zinc Contents of Wheat on Chernozemic Soils

Cited by 14 publications

References 19 publications

High Soil Test Phosphorus Effect on Corn Yield

High Soil Test Phosphorus Effect on Corn Yield

Use of a coupled soil-root-leaf model to optimise phosphate fertiliser use efficiency in barley

4R Management of Phosphorus Fertilizer in the Northern Great Plains

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