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棉花干物质积累苗期缓慢,蕾期加快,开花到结铃盛期达到高峰,此后逐渐平稳,且积累的干物质在生长前期主要分配于根、茎和叶等营养器官,后期分配于蕾铃等生殖器官。棉花对养分的吸收与分配,与其干物质积累分配的趋势基本一致,前期逐渐增加,开花结铃期达到高峰,吐絮以后缓慢下降。但是,不同地区、不同栽培条件下,棉花干物质积累分配与养分吸收分配特点也表现出一定的差异。
Dry matter accumulation of cotton at seedling stage was slow, bud stage was accelerated, flowering peaked at the end of flowering, and then gradually became stable. The accumulated dry matter was mainly distributed in vegetative organs such as roots, stems and leaves at the early stage of growth, Other reproductive organs. Cotton absorption and distribution of nutrients, and its dry matter accumulation and distribution of the trend is basically the same, the first phase of the gradual increase in the flowering period reached its peak, bolting later declined slowly. However, under different cultivation conditions, the characteristics of cotton dry matter accumulation and nutrient absorption and distribution also showed some differences.