Chemical composition of brassica varieties and hybrids as affected by environment and stage of growth

摘要

Material from eight lines of kale (chou moellier), consisting of four established varieties and four selections from crosses between chou moellier and related species, was analysed for total minerals, ether extract, total nitrogen, lignin, cellulose, and available carbohydrates. Since the lines were grown in replicated trials in three widely different environments and, in two of these, were sampled at three different times during growth, effects of environment, variety, and stage of growth were distinguished. A table (Table 8) in which these effects are summarised is given at the end of the paper. The analyses presented demonstrate strong physiological responses by the crops to environmental factors. The probable manner in which these responses affect animal utilisation is discussed. Time trends in composition as affected by environment and variety have been demonstrated within two of the environments. The components determined accounted for 50#x2013;60 of the original dry matter.