冀中南位于北纬36～39度之间,年平均≥3℃积温4900℃,≥15℃积温3800℃,年降雨量500～600毫米。全年总辐射量为120千卡/厘米~2。5月份气温高,光照足,有利小麦灌浆成熟。8～9月份秋高气爽,昼夜温差大,有利干物质的积累和成铃吐絮。所以利用小(大)麦秋末至夏初生长为主、棉花夏秋生长为主的时差,能较好地利用当地自然资源,进行麦棉两熟栽培。 Jizhongnan is located between 36 and 39 degrees north latitude, the annual average ≥ 3 ℃ accumulated temperature 4900 ℃, ≥ 15 ℃ accumulated temperature 3800 ℃, the annual rainfall of 500 to 600 mm. The annual total radiation was 120 kcal / cm ~ 2. May high temperature, light enough, wheat filling mature. 8 ~ September autumn, temperature difference between day and night, the accumulation of beneficial dry matter and boll boll. Therefore, the use of small (large) wheat late autumn to early summer growth mainly cotton summer growth mainly based on the time difference, can make better use of local natural resources, cotton and cotton cultivation.