Publication Date
1985
Location
Kyoto Japan
Description
Effects of interactions between aerial temperature, root temperature, and phosphorus (P) supply on growth and critical P concentrations in the tropical legume Mecroptilium atropurpureum cv. Siratro have been studied in controlled environments. Maximum growth of siratro when supplied with adequate P was achieved at aerial temperatures of 30/25°C ( day/night) and 35/30°C when root temperatures were maintained at 30°C. Aerial temperatures of 25/20 °C severely restricted growth, particularly when a root temperature of 20°C was used. Neither aerial temperatures nor root temperatures had any discernible effect on the amount of P needed to be applied to obtain maximum yield. Low temperature increased the proportion of the plant's total dry matter partitioned to the root systems. This proportion was also increased by P deficiency, particularly when plant roots were maintained at either 20°C or 25°C. Critical P concentrations decreased as aerial temperature increased. Raising root temperatures by 5°C did not significantly change critical P concentrations. The effects of aerial temperature on critical P concentrations have important implications when using tissue P concentrations to assess the P status of siratro.
Citation
Smith, F W. and Andrew, C S., "Effects of Interactions Between Temperate and Phosphorus Supply on Growth and Critical Phosphorus Concentrations in Macroptilium atropurureum Cv. Siratro" (1985). IGC Proceedings (1985-2023). 15.
(URL: https://uknowledge.uky.edu/igc/1985/ses6/15)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effects of Interactions Between Temperate and Phosphorus Supply on Growth and Critical Phosphorus Concentrations in Macroptilium atropurureum Cv. Siratro
Kyoto Japan
Effects of interactions between aerial temperature, root temperature, and phosphorus (P) supply on growth and critical P concentrations in the tropical legume Mecroptilium atropurpureum cv. Siratro have been studied in controlled environments. Maximum growth of siratro when supplied with adequate P was achieved at aerial temperatures of 30/25°C ( day/night) and 35/30°C when root temperatures were maintained at 30°C. Aerial temperatures of 25/20 °C severely restricted growth, particularly when a root temperature of 20°C was used. Neither aerial temperatures nor root temperatures had any discernible effect on the amount of P needed to be applied to obtain maximum yield. Low temperature increased the proportion of the plant's total dry matter partitioned to the root systems. This proportion was also increased by P deficiency, particularly when plant roots were maintained at either 20°C or 25°C. Critical P concentrations decreased as aerial temperature increased. Raising root temperatures by 5°C did not significantly change critical P concentrations. The effects of aerial temperature on critical P concentrations have important implications when using tissue P concentrations to assess the P status of siratro.
