Phosphorus Uptake in Six Selected Scandinavian Wheat and Barley Cultivars at Low Soil Phosphorus Availability as Related to Root Hair Length

摘要: Lower soil phosphorus (P) levels are to be expected if more sustainable agriculture practices (organic farming, low-input farming) adopted. Crop plants can adapted lower P by selecting and breeding for higher efficiency. Longer root hairs found enhance the efficiency of cereals increasing uptake. In this study, three pairs Swedish Norwegian cereal cultivars (wheat cvs. NK0058 Diamant; 6-row barley NK94682 Herse; 2-row Tyra Herta), with respectively short long within each pair as measured in solution culture were grown. The grown at four (P0: 35 mg P-AL kg-1 soil; P16: 49 mg; P32: 87 P48: 130 mg) a long-term PK fertilisation field trial. choice was based on hair lengths previous experiment. aim study investigate effect cultivar level concentration (P utilisation efficiency), uptake efficiency, grain chemical composition, length, dry matter production, yield, growth, 1000-grain weight, hectolitre-weight phenological development. The results showed production yield low Diamant, Herse Herta than NK0058, Tyra, respectively, indicating these cultivars. Total also higher, (mg g-1 shoot matter, efficiency) tended lower, suggesting efficiencies Probably accounted most variation between cultivars, whereas less importance. Dry generally increased level. However except modern decreased highest As increased, differences diminished, that factors important high level. Recordings development moisture content confirmed increases rate cereals. 1000-litre weight increase Root growth topsoil increased. grew longer ranking regard only part similar culture, length much smaller or insignificant compared Hence, terms might prove difficult. A reported response In contrast, suggested opposite. due hairs. However, it is variations other such exudation organic acids phosphatase lowering rhizosphere pH Grain concentrations N, P, K, Ca Mg consistent former findings. There no effects study. conclusion, there great genotypes. This may explained different lengths. Adapting crops levels, selection breeding, thus possible means sustainability agroecosystem.