Comparison of the Uptake of P<sup>32</sup> and K<sup>42</sup> by Intact Alfalfa and Oat Roots

Lambert, Roger G.; Linck, A. J.

doi:10.1104/pp.39.6.920

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…From these results, M3‐K was considered to be an independent component suggesting a distinct replenishing mechanism of K in the soils of the study area. Hereby, there were three possible mechanisms: (i) the weathering of micas, a significant K source in the soils, was accelerated after the forest clearing; (ii) the plants took up K from the subsoil and accumulated it in the surface soil as the poaceous grasses preferentially absorb K (Lambert and Linck 1964); and (iii) deposit of cattle manure that usually contained a high amount of K (Arevalo et al . 1998).…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, there was no correlation between these macronutrients and M3-K. From these results, M3-K was considered to be an independent component suggesting a distinct replenishing mechanism of K in the soils of the study area. Hereby, there were three possible mechanisms: (i) the weathering of micas, a significant K source in the soils, was accelerated after the forest clearing; (ii) the plants took up K from the subsoil and accumulated it in the surface soil as the poaceous grasses preferentially absorb K (Lambert and Linck 1964); and (iii) deposit of cattle manure that usually contained a high amount of K (Arevalo et al 1998). Nevertheless, the mechanism (i) was most likely since the soil at the study site were very illitic ( Figure 5), whereas the mechanisms (ii) and (iii) were less possible because of the increase in M3-K in CL.…”

Section: Resultsmentioning

confidence: 99%

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Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

et al. 2007

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The present study investigated macro‐ and micronutrient status in the soils under the native forest (NF), cropland (CL) and rangeland over 27 years in Colonia Okinawa, Santa Cruz, Bolivia, in order to assess the effect of land use on soil fertility in the region. The C, N and P pools in the soil of CL were less by 60, 57 and 27% as compared to NF, respectively. The rangeland with Panicum maximum (RG) showed almost similar values of C, N and P pools to CL, while the values in the rangeland with Paspalum notatum (RB) were relatively closer to NF. Mehlich‐3 extractable P, Ca and Mg considerably declined in CL, RG and RB, but an inverse trend was observed in Mehlich‐3 extractable K probably due to the stimulation of weathering of illite in the soil. Mehlich‐3 extractable Mn, Fe and Cu were tended to increase in RG and RB, which suggested possible accumulation of these metals because of the manure deposited by grazing cattle on the rangelands. Besides C, N and P pools, the values of Mehlich‐3 extractable K, Mn, Fe and Zn were less in RG than RB because of greater exploitation of these nutrients in RG than RB. There was a significant correlation between C, N, P, Ca, Mg and Zn suggesting that the dynamics of these components could be associated with the organic matter in the soil. The findings of this study clarified the soil chemical degradation in the cropland and rangeland. However, the magnitude of the land chemical deterioration under the rangeland was highly variable depending on the grass species.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

et al. 2007

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“…This observation, plus the fact that cowpea was more severely affected than rice by stover removal (Table 1), suggests that upland rice is better adapted than cowpea to low K soils. Lambert and Linck (1964) studied the competition between legumes and grasses for K and found the grass took up much more K than the leg- . Exchangeable K to a depth of 90 em for the 0 kg K ha-t rate with stover removed (solid bars) or returned (crosshatched bars) for 12 crops (cowpea, rice, rice, cowpea, rice, rice, cowpea, rice, cowpea, cowpea, rice, and cowpea).…”

Section: Potassium Use Efficiency Of Rice and Cowpeamentioning

confidence: 99%

Management and Dynamics of Potassium in a Humid Tropical Ultisol under a Rice‐Cowpea Rotation

Cox

Uribe

1992

Agronomy Journal

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Little is known about the role of K fertilization, stover management, and tillage methods on soil K availability as they affect rice (Oryza sativa L.) and cowpea [Vigina unguiculata (L.) Walp.] productivity on Ultisols of the humid tropics. The effects of five K rates (0‐120 kg K ha−1), returning or removing stover, and three tillage methods (no‐till, strip, and conventional) were evaluated during 12 crops of rice and cowpea grown for a 4‐yr period. Fertilizer K was applied to the first seven crops. The site was a recently cleared, 18‐yr‐old secondary forest in the Peruvian Amazon Basin. The soil was a fine‐loamy, siliceous, isohyperthermic Typic Paleudult. Soils samples were collected at each crop harvest to 90 em in 15‐cm increments. Potassium fertilizer always increased grain yields when stover was removed. Conversely, responses to K additions were seldom obtained when the stover was returned. The extractable K (Modified Olsen) critical level for both upland rice and cowpeas was calculated to be 0.10 cmol L−1. Returning stover with no K fertilization maintained soil K concentrations above critical levels for both species up to the last crop of the rotation. Residual effects of fertilizer K were prolonged by returning the stover. When stover was returned, subsoil exchangeable K increased with increasing rate of K fertilization. Removal of stover resulted in greater increases in subsoil exchangeable K at the 40 kg K ha−1 rate than at 120 kg K ha−1, apparently because the higher rate resulted in K fixation. Tillage methods did not affect crop yields.

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Mineralstoffwechsel

Marschner

1965

Progress in Botany

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Comparison of the Uptake of P³² and K⁴² by Intact Alfalfa and Oat Roots

Cited by 10 publications

References 13 publications

Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

Management and Dynamics of Potassium in a Humid Tropical Ultisol under a Rice‐Cowpea Rotation

Mineralstoffwechsel

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Comparison of the Uptake of P32 and K42 by Intact Alfalfa and Oat Roots

Cited by 10 publications

References 13 publications

Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

Land‐use effects on soil macro‐ and micronutrient status in tropical lowland zone of Bolivia

Management and Dynamics of Potassium in a Humid Tropical Ultisol under a Rice‐Cowpea Rotation

Mineralstoffwechsel

Contact Info

Product

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About

Comparison of the Uptake of P³² and K⁴² by Intact Alfalfa and Oat Roots