Controlled climate comparisons of a tropical grass and legume.

Abstract

Glycine javanica cv. Tinaroo and green panic, grown in a phytotron, were compared in terms of growth analysis, transpiration coefficients and response to 7 different root temp. Green panic had a higher NARI (NAR on a light-interception basis) than G. javanica. This resulted in a higher RGR; thus, green panic made more efficient use of the light intercepted. The grass had higher shoot/root ratios than the legume, especially at later harvests and higher temp. 5 other G. javanica cv. had RGR and NARI values similar to those of Tinaroo, but their shoot/root ratios approached those of green panic. Green panic produced about 80% more DM per unit of water than G. javanica and made better growth at root temperatures of > 30 degrees C. The practical implications of the results are discussed. [See also abs. 1479]-A.M.H. (Abstract retrieved from CAB Abstracts by CABI’s permission)