Growth and nutrient uptake in grain sorghum grown under mulch
Titel:
Growth and nutrient uptake in grain sorghum grown under mulch
Auteur:
Maranville, J. W. Clark, R. B.
Verschenen in:
Journal of plant nutrition
Paginering:
Jaargang 1 (1979) nr. 3 pagina's 255-272
Jaar:
1979
Inhoud:
Mulches can alter plant growth by changing the soil environment, but their effects on mineral uptake in grain sorghum are unknown. A 3-year study was conducted to measure nutrient uptake in plants grown under 0, 2200, 4400, and 8800 kg/ha mulch. Plants were irrigated to insure that moisture was not limiting. Dry-matter production, total mineral uptake and concentrations were determined at 7- to 9-leaf, late boot, soft dough, and physiological maturity growth stages. Mulches altered sorghum growth by delaying plant maturity and by increasing dry-matter yields. Nutrient uptake increased with increased dry-matter production although elemental concentrations declined. Hybrid reaction to mineral uptake was dependent on the specific environment created by the mulch. Hybrids did not respond the same to given mulch rates each year. Management considerations for soil fertility under mulch conditions should be made on the basis of expected dry-matter yields for the specific environment.
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