Publication Date

1989

Description

The initial development analysis is destinated to the evalu­ation of net production in plants, derivated from the photosyntetic process and the perform results of the assimilat­ive system during certain time period (Watson, 1952). The factors that guide plant production, in general, may be classificated in three classes : genetic, ecological and physiologi­cal factors. The physiological factors are : leaf area index (LAI), net assimilation rate (EA) and relative growth rate (Rw) (Alvim, 1962). Some authors think that little genetic difference exist in relation to EA and that there is a little probability of increasing the production capacity of species through plant's selections for higher EA (Watson, 1952). However, appreciable differences have been found among species (Alvin, 1962), as well as within species (Watson, 1952). The purpose of this essay was to verify the different develop­ment among cultivars and species of different grasses and for­age legumes.

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Study of Forage Plants' Initial Growth using the Quantitative Development Analysis

The initial development analysis is destinated to the evalu­ation of net production in plants, derivated from the photosyntetic process and the perform results of the assimilat­ive system during certain time period (Watson, 1952). The factors that guide plant production, in general, may be classificated in three classes : genetic, ecological and physiologi­cal factors. The physiological factors are : leaf area index (LAI), net assimilation rate (EA) and relative growth rate (Rw) (Alvim, 1962). Some authors think that little genetic difference exist in relation to EA and that there is a little probability of increasing the production capacity of species through plant's selections for higher EA (Watson, 1952). However, appreciable differences have been found among species (Alvin, 1962), as well as within species (Watson, 1952). The purpose of this essay was to verify the different develop­ment among cultivars and species of different grasses and for­age legumes.