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冀东棉区京津唐位于黄河流域的最北部 ,无霜期仅 1 75～ 1 80天 ,≥ 1 0℃积温 32 0 0℃ ,热量条件只能满足中早熟品种最低要求。年降水量 60 0～70 0 mm,伏期雨量特别集中 ,7～ 8月份降雨量常占年雨量的 65%左右。棉田土壤以潮土为主 ,沿渤海湾一带多滨海盐土 ,山麓地带还有褐
Jidong Cotton Belt Beijing-Tianjin-Tangshan is located in the northernmost part of the Yellow River basin, frost-free period of only 75180 days, ≥ 10 ℃ accumulated temperature 32 0 0 ℃, heat conditions can only meet the minimum requirements of early maturing varieties. The annual precipitation is 60 0 ~ 70 0 mm. The rainfall in the period of volt-age is particularly concentrated. The rainfall in July-August often accounts for about 65% of the annual rainfall. The soil of cotton field is dominated by alluvial soil, along the coastal area of the Bohai Bay, there are many coastal saline soils, foothills and brown