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- W2989872668 abstract "Cotton (Gossypium spp.) is often grown in environments where the crop is subject to periods of water deficit or waterlogging. Glasshouse studies were conducted from January 1987 to April 1990 to elucidate the cause or causes of poor cotton growth under drought and flooding conditions, with a particular emphasis on nutritional aspects. Growth and nutrition during the recovery from flooding stress were studied also. Initially, the effects of drought and flooding were studied on the growth and nutrient uptake of four cotton cultivars, viz. Deltapine 61 (DP61), Deltapine 90 (DP90), Sicot 3 and Siokra, grown on two vertisols (AUg and BUg). Stress conditions were imposed twice at 21 and 35 d after planting (DAP), and the experiment was terminated at 49 DAP. Results showed that cotton grew better on the AUg than on the BUg soil both under well-watered and under stress conditions. Both drought and flooding resulted in poor cotton growth, the effects being more pronounced on the AUg soil. The reduction in growth was associated with a marked decrease in the concentrations of phosphorus (P), and to a lesser extent in those of potassium (K), calcium (Ca), magnesium (Mg), sulphur (S) and copper (Cu) in plant tops. No cultivar differences in response to drought or flooding were evident, probably due to their similarity in growth and nutrient status at the start of the drought or flooding period. Because decreases in both nitrogen (N) and P status have been associated with poor growth of flooded cotton, the responses of cotton (cv. DP90) to N and P fertilisation and to flooding on the AUg and BUg soils were studied in a second experiment. Nitrogen (0, 100 and 200 Kg N ha-1) and P (0 and 80 kg P ha-1) fertilisers were applied at planting. Two flooding regimes were initially imposed at 35 (then at 49 and 63 DAP) or at 49 DAP (then at 63 DAP). Plants grown on the AUg soil responded to N fertilisation, while P fertilisation improved plant growth on the BUg soil, regardless of flooding regime. Oxygen (O2) depletion following flooding of both soils was similar, the O2 concentration in the soil solution decreasing to <2% (v v-1) after 4 d of flooding." @default.
- W2989872668 created "2019-12-05" @default.
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- W2989872668 date "2019-11-15" @default.
- W2989872668 modified "2023-09-24" @default.
- W2989872668 title "UQ eSpace" @default.
- W2989872668 doi "https://doi.org/10.14264/f017103" @default.
- W2989872668 hasPublicationYear "2019" @default.
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