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试验设12 000株/hm2、21 000株/hm2、30 000株/hm2、39 000株/hm2、48 000株/hm2和57 000株/hm26个密度水平,分别研究棉花单株、叶、茎和根在不同时期的含水率并作相互比较。结果表明:从密度水平来看,当48 000株/hm2时,单株含水率可达到较高水平,最高为82.92%;而不同密度水平下棉花单株、叶、茎和根的含水率随时间变化的趋势大致相同,均在6月初时最低,7月初和7月底时分别出现峰值。单株和棉叶含水率均以7月下旬最高(分别为82.69%～83.40%和81.92%～82.98%),而棉茎和棉根含水率均以7月初最高(83.50%～86.47%,77.10%～78.60%)。棉株各器官间含水率随时间而变化,6月初至7月中旬:棉茎>棉叶>棉根;7月下旬及以后:棉叶>棉茎>棉根。
The experiment set the density of 12 000 plants / hm2, 21 000 plants / hm2, 30 000 plants / hm2, 39 000 plants / hm2, 48 000 plants / hm2 and 57 000 plants / hm26. Root moisture content at different times and for comparison with each other. The results showed that when the density was 48 000 plants / hm2, the moisture content of single plant, leaf, stem and root could reach a higher level and the highest one was 82.92% The trend of time is roughly the same, with the lowest in early June and the peak in early July and the end of July respectively. The moisture content of single plant and cotton leaf were the highest in late July (82.69% -83.40% and 81.92% -82.98% respectively), and the moisture content of cotton stem and cotton root were the highest in early July (83.50% -86.47%, 77.10 % ~ 78.60%). The moisture content of various organs of cotton plants changed with time, from early June to mid July: cotton stem> cotton leaf> cotton root; late July and after: cotton leaf> cotton stem> cotton root.