Potassium in soil and pasture and leaching of cations on an allophanic soil in New Zealand

Morton, J. D.; Roach, C. G.; Tong, Man; Roberts, A. H. C.

doi:10.1080/00288233.2004.9513582

Cited by 13 publications

(19 citation statements)

References 13 publications

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“…Morton et al (2004) also found the increasing rates of Cl leaching with application of K as compared to control. nearly all the leachates irrespective of the quality of irrigation water.…”

Section: The [So 4 ] and [Cl] Significantly Increased In All Thementioning

confidence: 75%

“…Robbins (1984) concluded that higher [K] were held in soil while Na leached down that reduced SAR and ESP. Potassium competes with other cations such as Ca and Mg for retention on soil exchange sites and high K levels may lead to increased leaching of Na and associated anions such as SO 4 and Cl (Morton et al, 2004).…”

Section: Chemical Composition Of Plant Tissuesmentioning

confidence: 99%

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Effect of saline irrigation water on the leachability of salts, growth and chemical composition of wheat (Triticum aestivum L.) in saline-sodic soil supplemented with phosphorus and potassium

Hussain

Khattak

Irshad

et al. 2016

J. Soil Sci. Plant Nutr.

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Salinity-fertility interaction has not been properly explored especially in saline-sodic soils. Therefore, the current study investigated the response of wheat (Triticum aestivum L.) to saline irrigation water in salinesodic soil supplemented with potassium (K) and phosphorus (P). Wheat was grown in pots filled with salinesodic soil which were irrigated either with normal or saline water. Potassium and P fertilizers were applied at two levels. Results indicated that growth of wheat plants was impaired by saline irrigation resulting in a decreased grain and dry matter yield. The P application had significant effect on the dry matter yield and other yield components. Potassium application significantly increased dry matter yield and root mass. Wheat yield increased by 14 and 7% with the application of 150 kg K 2 O ha -1 and 120 kg P 2 O 5 ha -1 over the control soil under saline irrigation. The higher yield was obtained with combined P and K treatment under non-saline irrigation. The P addition significantly affected shoot and root [P] and [Na], [K] and [Mg] in the shoot tissue while the K:Na ratio produced non-significant effects under both irrigation waters. The addition of K significantly affected [Na], [K] and K:Na ratio in shoot. All other root parameters were significantly affected by the K addition. The Ca uptake by roots increased with saline irrigation. The P addition increased [P] in plant tissue. The Na uptake by root and shoot tissues was depressed with the addition of P and K fertilizers. The higher K uptake increased K:Na ratio in both shoot and root tissues. The values of EC, SAR and [P], [Na], [Ca], [Mg], [Cl] and ratios of Na:K, Ca:P, Cl:P and SO 4 :P in the soil leachates significantly increased with saline irrigation. The P addition had significant bearing on the soil pH, SAR, [P] Effect of saline irrigation water on the leachability of salts, growth and chemical composition that the addition of P and K under saline-sodic conditions may affect salts and nutrients dynamics of the soil and was useful for crop productivity.

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“…Morton et al (2004) also found the increasing rates of Cl leaching with application of K as compared to control. nearly all the leachates irrespective of the quality of irrigation water.…”

Section: The [So 4 ] and [Cl] Significantly Increased In All Thementioning

confidence: 75%

Section: Chemical Composition Of Plant Tissuesmentioning

confidence: 99%

Effect of saline irrigation water on the leachability of salts, growth and chemical composition of wheat (Triticum aestivum L.) in saline-sodic soil supplemented with phosphorus and potassium

Hussain

Khattak

Irshad

et al. 2016

J. Soil Sci. Plant Nutr.

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“…(1 yr (1 (Campkin 1985; Morton et al 2004;Monaghan et al 1999Monaghan et al , 2005Early et al 1998). …”

Section: K Buffer Capacitymentioning

confidence: 99%

The diagnosis and correction of potassium deficiency in New Zealand pastoral soils: a review

Edmeades

Morton²,

Waller

et al. 2010

New Zealand Journal of Agricultural Research

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Field-trial data from a database comprising records of 804 potassium (K) fertiliser trials were used to define the production functions relating exchangeable soil K (quick test K (QTK) 0Á75 mm) to the relative response to fertiliser K applications, for the major soil groups in New Zealand. For all soil groups for which there were sufficient data, the production functions were generally flat in the range QTK 5Á10, and thus the estimated relative pasture production at QTK 5 and QTK 10 were similar. The critical QTK levels to achieve 97% maximum production were relatively well defined, being 6 (5Á8) for sedimentary soils (brown and pallic) and brown soils, and 7 (5Á10) for pumice soils. The data for the allophanic soils were unstable and the best estimate was 6 (5Á10). For the remaining soils groups (podzols and raw soils, organic, recent and gley soils) for which there was much less data, the relationships were essentially flat over the range QTK 2Á10. The probability of pasture responses to applied K increased as soil QTK decreased from 10. For the sedimentary and volcanic soils (including both allophanic and pumice) the probability was about 70Á80% at soil QTK B2. The comparable probabilities were 50Á60% for the recent and gley soils, and 30Á43% for the podzols and raw soils. A feature of the response functions was that some trials were not responsive to fertiliser K despite having low soil QTK. In most cases this could not be attributed to soil K reserves as measured by the soil TBK test (sodium tetra-phenol-boron extractable which measures exchangeable K plus plant-available but non-exchangeable K). Other possible reasons for this feature in the data are discussed, including uptake of K from below the soil sampling depth and the temporal effects of clover responses to applied K. Soil K buffer capacities*the amount of fertiliser K over and above maintenance required to increase soil QTK by 1 unit (DK)*ranged from 50 to 150 kg K ha (1 (average 124) for sedimentary soils. For some soils (developed organic soils, gleyed soils and podzols), fertiliser K had very little effect on QTK (0Á75 mm). It is not clear whether these differences are due to differences in leaching of K from the sampling depth, differences between soils in their ability to absorb and retain applied K or indeed the result of errors in the measurement of this parameter. Estimated maintenance K requirements (i.e. the amount of applied K required to maintain soil QTK levels) increased with increasing soil QTK from 4 to 10, from 0Á150 kg K ha(1 yr (1 to 100Á300 kg K ha (1 yr (1 in situations where losses of K were extreme due to the removal of all harvested clippings. Given the uncertainties in predicting K responses and the amount of fertiliser K required to correct K deficiency, practical suggestions are offered as to how best to diagnose and manage soil K deficiency. Areas for future research to improve the prediction of pasture responses to fertiliser K are also included.

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“…Cow taste-strip trials carried out in October and November 2002 within a farmlet trial at Whareroa Research Centre in South Taranaki (described in Morton et al 2004) compared cow preference with pasture intake measured using the alkane technique at the same site (see below). The cow taste-strip trial was sited in two farmlet paddocks that had received 150 kg KCl ha -1 in March 2000.…”

Section: Farmlet Sitesmentioning

confidence: 99%

“…Sixteen Friesan × Jersey cows in each of two farmlets at Whareroa Research Centre in the third year (2002/03) of a trial designed to measure the effects of rate of K fertiliser on pasture and milksolids production (reported in Morton et al 2004) were used to measure the effect of the K content of pasture on pasture intake using the alkane technique (Dove & Mayes 1991 Extra KCl was applied to widen the difference in pasture K content between the two treatments. The cows were dosed twice daily at milking with capsules containing 356 mg C 32 alkane over a period of 10 days.…”

Section: Farmlet Sitesmentioning

confidence: 99%

Effect of potassium content and dusting of sodium chloride on the pasture preference of dairy cows

Morton

Roach²,

Roberts³

2005

New Zealand Journal of Agricultural Research

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The potassium (K) content of New Zealand ryegrass/white clover pastures can exceed the requirements for optimum pasture production (2.5-3.0%) and dairy cow requirements (0.2-0.6%) during late spring. Experiments were carried out at 13 sites in three different dairying regions over 2-3 years on different soil types to determine the effects on the cow's preference for pasture of either increasing pasture K content from applications of 0, 200, 400, and 800 kg of potassium chloride (KCl) ha -1 , or the effect of dusting sodium chloride (NaCl) at 0, 5, 10, and 20 kg ha -1 immediately before grazing. Cow preference was assessed by measurements of bite rate, grazing time, pasture dry matter (DM) disappearance, and bite size. In addition, the pasture intake of two groups of cows, one group grazing pasture with K content in the optimum range for pasture production, and one group on pasture above that range, was measured using the alkane technique. In South Taranaki on Allophanic soils, increasing A04008;

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Potassium in soil and pasture and leaching of cations on an allophanic soil in New Zealand

Abstract: Potassium chloride (KCl) was applied at 0, 150, 450, and 750 kg ha -1

Cited by 13 publications

References 13 publications

Effect of saline irrigation water on the leachability of salts, growth and chemical composition of wheat (Triticum aestivum L.) in saline-sodic soil supplemented with phosphorus and potassium

Effect of saline irrigation water on the leachability of salts, growth and chemical composition of wheat (Triticum aestivum L.) in saline-sodic soil supplemented with phosphorus and potassium

The diagnosis and correction of potassium deficiency in New Zealand pastoral soils: a review

Effect of potassium content and dusting of sodium chloride on the pasture preference of dairy cows

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