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- W179922910 abstract "Phosphorus (P) use efficiency for cucumber grown on acid soils wasstudied. The objectives of this experiment were: (i) to screen the solubility ofthree phosphate rocks in acid soils with the aim of selecting one phosphate rock(PR) with the best P and calcium (Ca) solubility in acid soils - a laboratorystudy, (ii) to determine the most economical P source, critical P level, and therelationship between P uptake (Ps) and phosphorus dissolution from PR (PDP)or Pb/P - green house study, and (iii) to improve upon P availability in anacid soil cultivated with cucumber influenced by mycorrhiza (VAM) inoculation,organic matter (OM) amendment and P rate - field study. Results of theexperiment indicated that in a closed incubation system, dissolution of Indonesian phosphate rock (IPR) (30.20 to 100.00%) was the highest followedby Gafsa phosphate rock (GPR) (17.00 to 68.80%) and then China phosphaterock (CPR) (19.80 to 53.80%). Three major factors which may affect the PRdissolution were identified: (i) soil texture (STF), (ii) soil acidity (SAF) and (iii)fertilizer (FF). Soil texture (clay, silt and sand contents) and P retention capacityshowed the highest magnitude (54%) of the factor effect on P dissolution. In agreen house, there was significant difference between soils and P levels withregards to total plant dry matter yield (DMY), leaf area, soil N, K and Canutrients, and N, K and Ca uptake by cucumber at three harvests extendingfrom 14 to 42 days. The IPR (RAE = 177.10%) and GPR (RAE = 145.50%)were superior to triple superphosphate (TSP). On the soils with high P retentioncapacity (> 50%), the supply of P from both IPR and GPR on cucumber weremuch cost effective than TSP, with relative economic effectiveness (REE)values of 495.50% and 318.60% for IPR and GPR, respectively. For GPR, therewas a positive correlation between P uptake (LPs) and P dissolution (LP) aswell as P uptake (LPs), and P availability (LPb). Similar observation was madefor IPR and not TSP. There was a close relationship between residual Pdetermined by Pb method and P uptake (Ps) by cucumber at 28 and 42 dayswith correlation coefficients varying from 0.76 to 0.97 for GPR, IPR and TSP inthe three acid soils." @default.
- W179922910 created "2016-06-24" @default.
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- W179922910 date "2003-04-01" @default.
- W179922910 modified "2023-09-27" @default.
- W179922910 title "Phosphorus Use Efficiency for Cucumber (Cucumis Satnus L.) Grown on Acid Soils" @default.
- W179922910 hasPublicationYear "2003" @default.
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