Effects of long-term irrigation on soil phosphorus under temperate grazed pasture

Changes in soil phosphorus (P) associated with the establishment and maintenance of improved ryegrass-clover pasture under different superphosphate fertiliser treatments were examined over a 20-year period (1957-77). Results showed that soil organic P increased with increasing applications of P fertiliser. This represents a dynamic balance between rates of organic P addition and breakdown in the soil. This balance is reached slowly and may be significantly altered only by drastic changes in land use. In annually fertilised soils, amounts of inorganic P increased with time. However, the potential utilisation of this residual inorganic P is limited by its apparent stability in the soil. Keywords grazed pasture, irrigation, fertiliser P, soil inorganic P, soil organic P, soil P fractionation

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Crop residue application at low rates could improve soil phosphorus cycling under long-term no-tillage management

Biology and Fertility of Soils ◽

10.1007/s00374-020-01531-3 ◽

2021 ◽

Vol 57 (4) ◽

pp. 499-511

Author(s):

Guohui Wu ◽

Kai Wei ◽

Zhenhua Chen ◽

Dongqi Jiang ◽

Hongtu Xie ◽

...

Keyword(s):

Crop Residue ◽

Soil Phosphorus ◽

Phosphorus Cycling ◽

No Tillage

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Soil phosphorus availability and soybean response to phosphorus starter fertilizer

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832014000500014 ◽

2014 ◽

Vol 38 (5) ◽

pp. 1487-1495 ◽

Cited By ~ 3

Author(s):

Ciro Antonio Rosolem ◽

Alexandre Merlin

Keyword(s):

Soil Phosphorus ◽

Soil Surface ◽

Tropical Soils ◽

P Fertilization ◽

Soil P ◽

Brachiaria Ruziziensis ◽

Soluble P ◽

Surface Spread ◽

P Sources

Phosphorus fixation in tropical soils may decrease under no-till. In this case, P fertilizer could be surface-spread, which would improve farm operations by decreasing the time spend in reloading the planter with fertilizers. In the long term, less soluble P sources could be viable. In this experiment, the effect of surface-broadcast P fertilization with both soluble and reactive phosphates on soil P forms and availability to soybean was studied with or without fertilization with soluble P in the planting furrow in a long-term experiment in which soybean was grown in rotation with Ruzigrass (Brachiaria ruziziensis). No P or 80 kg ha-1 of P2O5 in the form of triple superphosphate or Arad reactive rock phosphate was applied on the surface of a soil with variable P fertilization history. Soil samples were taken to a depth of 60 cm and soil P was fractionated. Soybean was grown with 0, 30, and 60 kg ha-1 of P2O5 in the form of triple phosphate applied in the seed furrow. Both fertilizers applied increased available P in the uppermost soil layers and the moderately labile organic and inorganic forms of P in the soil profile, probably as result of root decay. Soybean responded to phosphates applied on the soil surface or in the seed furrow; however, application of soluble P in the seed furrow should not be discarded. In tropical soils with a history of P fertilization, soluble P sources may be substituted for natural reactive phosphates broadcast on the surface. The planting operation may be facilitated through reduction in the rate of P applied in the planting furrow in relation to the rates currently applied.

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Long-term excessive phosphorus fertilization alters soil phosphorus fractions in the acidic soil of pomelo orchards

Soil and Tillage Research ◽

10.1016/j.still.2021.105214 ◽

2022 ◽

Vol 215 ◽

pp. 105214

Author(s):

Xiaohui Chen ◽

Xiaojun Yan ◽

Mingkuang Wang ◽

Yuanyang Cai ◽

Xuefan Weng ◽

...

Keyword(s):

Soil Phosphorus ◽

Phosphorus Fractions ◽

Acidic Soil ◽

Phosphorus Fertilization ◽

Soil Phosphorus Fractions

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Long-term changes in topsoil nematode populations in grazed pasture under elevated atmospheric carbon dioxide

Biology and Fertility of Soils ◽

10.1007/s00374-009-0384-9 ◽

2009 ◽

Vol 45 (8) ◽

pp. 799-808 ◽

Cited By ~ 29

Author(s):

Gregor W. Yeates ◽

Paul C. D. Newton

Keyword(s):

Carbon Dioxide ◽

Atmospheric Carbon Dioxide ◽

Grazed Pasture ◽

Elevated Atmospheric Carbon Dioxide ◽

Long Term Changes ◽

Atmospheric Carbon

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Long‐term degradation from marshes into meadows shifts microbial functional diversity of soil phosphorus cycling in an alpine wetland of the Tibetan Plateau

Land Degradation and Development ◽

10.1002/ldr.4180 ◽

2021 ◽

Author(s):

Meng Li ◽

Yanbin Hao ◽

Zhongqing Yan ◽

Enze Kang ◽

Jinzhi Wang ◽

...

Keyword(s):

Tibetan Plateau ◽

Functional Diversity ◽

Soil Phosphorus ◽

Phosphorus Cycling ◽

The Tibetan Plateau ◽

Alpine Wetland ◽

Microbial Functional Diversity

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Soil phosphorus bioavailability as influenced by long-term management and applied phosphorus source

Canadian Journal of Soil Science ◽

10.1139/cjss-2018-0075 ◽

2019 ◽

Vol 99 (3) ◽

pp. 292-304

Author(s):

Tandra D. Fraser ◽

Derek H. Lynch ◽

Ivan P. O’Halloran ◽

R. Paul Voroney ◽

Martin H. Entz ◽

...

Keyword(s):

Management Practices ◽

Soil Phosphorus ◽

P Uptake ◽

Italian Ryegrass ◽

P Availability ◽

P Fractionation ◽

Soil P ◽

Plant P Uptake ◽

Term Management

Soil phosphorus (P) availability may be impacted by management practices, thereby affecting plant P uptake and plant response to P amendments. The aim of this study was to determine the effects of long-term management on soil P pools and to assess the response of P bioavailability, plant growth, and P uptake to mineral versus manure P treatments. Soils were collected from plots under organic (ORG), organic with composted manure (ORG + M), conventional (CONV), and restored prairie (PRA) management. Italian ryegrass (Lolium multiflorum L.) seedlings were grown in the greenhouse for 106 d in soils amended with various rates of manure or mineral P. The ORG soil had lower concentrations of labile P (resin-P and NaHCO3-P) compared with the CONV and PRA soils, as determined by sequential P fractionation prior to planting. Ryegrass biomass (root + shoot) and shoot P uptake from soils receiving no P were significantly lower for the ORG than all other management systems. Although apparent P use efficiency of the whole plant was increased by low P rate in the ORG management system, the source of applied P, manure > mineral, only influenced Olsen test P.

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