Effects of Pinus sylvestris var. mongolica afforestation on soil phosphorus status of the Keerqin Sandy Lands in China

The vegetable utilization rate of phosphorus fertilizer in greenhouse condition was low in the season of fertilizer application, resulting in phosphorus accumulation in the top soil year after year. The risk of phosphorus loss through leaching increased under the circumstance of inappropriate watering management and fertilization. In this study, leaching experiments using columns packed with a greenhouse soil with different soil phosphorus status (low, medium and high levels) were carried out under greenhouse condition to investigate the impact of fertilizer application on phosphorus leaching from greenhouse soil. The fertilization treatments included no fertilizer [CK], organic manure and chemical fertilizer [M+NPK], organic manure [M], chemical fertilizer [NPK]. The vertical migration and leaching loss of soil phosphorus were measured. Results were as follows: (1) total phosphorus (TP) content increased with the extension of leaching time. In the low-level- and medium-level-phosphorus greenhouse soils, TP concentration in the effluent increased with the application of manure; (2) In the high-level-phosphorus greenhouse soil, phosphorus in the effluent from the treatment with the use of fertilizer was the highest TP, with accumulative leaching amount of 2.85 mg in 51 days. The leaching of phosphorus became small after 36 days of leaching experiment. Our study showed that application of manure and chemical fertilizer at proper rates according to soil phosphorus status is beneficial to reduce the leaching loss of phosphorus to the environment.

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Determination of available soil phosphorus by chemical methods

Agricultural and Food Science ◽

10.23986/afsci.71982 ◽

1978 ◽

Vol 50 (4) ◽

pp. 305-316 ◽

Cited By ~ 1

Author(s):

Erkki Aura

Keyword(s):

Anion Exchange ◽

Exchange Resin ◽

Anion Exchange Resin ◽

Soil Phosphorus ◽

Phosphorus Uptake ◽

Ammonium Fluoride ◽

Acetate Solution ◽

Phosphorus Status ◽

Mineral Soils ◽

Resin Method

Phosphorus uptake by oats in pot experiments was compared with phosphorus test values obtained for experimental soils. Phosphorus was extracted from the soil using acid ammonium acetate solution, Bray 1 solution, Olsen solution, ammonium fluoride, distilled water and anion exchange resin. Intensity values were determined by equilibrating the soils with 0.01 M CaCl2 solution. Soil samples were collected from 30 mineral soils. The best test for phosphorus status proved to be the anion exchange resin method. Good results were also obtained with simple water extraction. An advantage of the water and resin method is that the microstructure of the soil is not substantially changed when using these methods. An intensity measurement was not in itself sufficient for analysis of the phosphorus status, since the intensity drops rapidly when soil releases phosphorus.

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Influence of Sludge Incineration Ash on Ryegrass Growth and Soil Phosphorus Status

Pedosphere ◽

10.1016/s1002-0160(18)60058-x ◽

2019 ◽

Vol 29 (1) ◽

pp. 70-81 ◽

Cited By ~ 3

Author(s):

Claude-Alla JOSEPH ◽

Lotfi KHIARI ◽

Jacques GALLICHAND ◽

Marc HÉBERT ◽

Ned BEECHER

Keyword(s):

Soil Phosphorus ◽

Sludge Incineration ◽

Phosphorus Status ◽

Ryegrass Growth

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The Phosphorus Response of Eucalyptus Seedlings Grown in a Pallid Zone Clay Treated With Three Levels of Lime

Australian Journal of Botany ◽

10.1071/bt9830231 ◽

1983 ◽

Vol 31 (3) ◽

pp. 231 ◽

Cited By ~ 9

Author(s):

B Dell ◽

JF Loneragan ◽

D Plaskett

Keyword(s):

Calcium Phosphate ◽

Soil Phosphorus ◽

Maximum Yield ◽

Eucalyptus Species ◽

Iron Deficiency Chlorosis ◽

Poor Growth ◽

Jarrah Forest ◽

Phosphorus Status ◽

Four Levels ◽

Complete Fertilizer

The responses of five Eucalyptus species (E. calophylla, E. globulus, E. maculata, E. marginata and E. resinifera) to four levels of calcium phosphate and three levels of lime (CaCO3) on a granitic pallid zone clay of pH 4.0 from a jarrah forest soil were examined in a glasshouse trial. In the presence of a complete fertilizer, except for lime and phosphate, seedlings made poor growth and had weak root systems with few fine roots. Application of calcium phosphate promoted shoot and root growth in all species. Application of lime had no effect on plant growth except at very high levels (7.1 g per kg soil), where it induced iron deficiency chlorosis in some species. All species achieved maximum yield with an application of calcium phosphate of between 30 and 300 mg per kg soil. Phosphorus concentrations in individual leaves and shoots were low (0.1-0.3%) and responded weakly to phosphate treatments. Phosphorus concentrations in stems responded strongly to increasing phosphate applications over the whole range of phosphate supply. We suggest that stem tissues may be used to indicate the phosphorus status of eucalypts.

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Effect of sowing date on the uptake and utilisation of phosphorus by wheat (cv. Osprey) grown in central New South Wales

Australian Journal of Experimental Agriculture ◽

10.1071/ea97104 ◽

1999 ◽

Vol 39 (2) ◽

pp. 161 ◽

Cited By ~ 14

Author(s):

G. D. Batten ◽

N. A. Fettell ◽

J. A. Mead ◽

M. A. Khan

Keyword(s):

Harvest Index ◽

Dry Matter ◽

Critical Concentration ◽

Soil Phosphorus ◽

Maximum Yield ◽

Sowing Date ◽

Phosphorus Concentration ◽

Sowing Time ◽

Phosphorus Status ◽

A Site

Experiments were sown at Cowra and Condobolin to determine the effect of sowing time (April–June) on the response to and utilisation of phosphorus by the wheat cultivar Osprey which requires vernalisation. Crops sown in April needed only 0–2 kg/ha of applied phosphorus to achieve 90% of the maximum yield for the site. This contrasts with crops sown at the traditional sowing time in May–June which needed from 11.5 kg P/ha, on a site with a moderate soil phosphorus status, to 36 kg P/ha, on a site with a very low soil phosphorus status, to produce 90% of the site maximum yield. Crops sown in April had higher yields and even without applied phosphorus accumulated more phosphorus (kg/ha) than crops sown in June with 40 kg P/ha. Crops sown in April had a lower dry matter harvest index, a lower phosphorus harvest index, produced less grain per kilogram of phosphorus in the shoots at maturity, and had a higher grain phosphorus concentration than crops sown in June. Grain protein was not affected by sowing date or the amount of phosphorus applied at sowing. At 90% of maximum dry matter yield shoots had 0.14–0.20% phosphorus at growth stage 30. The critical concentration of phosphorus in grain at 90% maximum grain yield increased with yield from 0.19 to 0.25% phosphorus. Farmers who sow wheat in April can achieve optimum yields with lower inputs of fertiliser phosphorus. However, this benefit will be offset by a lower phosphorus-use efficiency and more rapid depletion of phosphorus reserves from the soil.

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Prediction of yield responses to phosphorus by established Greenleaf desmodium/grass pastures in south-east Queensland using chemical tests

Australian Journal of Experimental Agriculture ◽

10.1071/ea9800477 ◽

1980 ◽

Vol 20 (105) ◽

pp. 477

Author(s):

GE Rayment ◽

RC Bruce ◽

BG Cook

Keyword(s):

Soil Phosphorus ◽

Residual Variance ◽

Total Soil ◽

Plant Chemical ◽

Diagnostic Samples ◽

Total Soil Phosphorus ◽

Independent Variable ◽

Phosphorus Status ◽

Yield Responses ◽

Phosphorus Levels

Phosphorus topdressing experiments (rates to 60 kg P ha-1) on 18 commercial Desmodium intortum cv. Greenleaf/grass pastures were conducted over a 4-year period in south-east Queensland. The aim was to determine whether yield responses, which occurred only in the Greenleaf component at six sites, could be predicted using soil or plant chemical tests. Acid-(0.005 M H2SO4) and bicarbonate-(0.5 M NaHCO3) extractable tests of phosphorus status in 0-10 cm soil samples each explained about 60% of the variance in Greenleaf relative yields. The residual variance was not significantly reduced by the inclusion of terms for total soil nitrogen, total soil phosphorus, exchangeable calcium and pH into the independent variable. These empirical soil phosphorus tests had higher predictive value than plant tests based on phosphorus concentrations in tops and diagnostic samples of Greenleaf. With both acid- and bicarbonate-extractable phosphorus, yield responses are likely in the Greenleaf component when phosphorus levels in most soils are below 22 ppm. Above 29 ppm, no response would be expected

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