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Growth analysis of short and long season cotton cultivars?

Bange, M.P. and Milroy, S.P.ORCID: 0000-0002-3889-7058 (1998) Growth analysis of short and long season cotton cultivars? In: 9th Agronomy Conference 1998, 20 - 23 July 1998, Charles Sturt University, Wagga Wagga, NSW


According to the nutritional hypothesis, the timing of crop maturity in cotton is affected by when the fruit that are already growing monopolise resources and prevent the crop from producing new fruiting sites. Maturity can therefore be influenced by either the supply of resources to the fruit or the level of demand generated by the fruit. Growth analysis was used to examine the supply of resources, in terms of the production and partitioning of dry matter, of an early and a late maturing cultivar grown in two fully irrigated field experiments. The two cultivars did not differ in peak leaf area index, above ground dry matter production or in allometric partitioning between the fruit and the rest of the shoot. Differences were however, found in light interception, canopy light extinction coefficient and radiation use efficiency in one experiment but not in a way that explain the differences in maturity.

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