<section class="_135editor" data-role="paragraph" style="max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; text-align: center; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="http://dayaotex-img.gz.bcebos.com/article/fffspic/mianhuazhishi003.jpg" _src="http://dayaotex-img.gz.bcebos.com/article/fffspic/mianhuazhishi003.jpg" data-ratio="0.744140625" data-w="512" style="margin: 0px; padding: 0px; width: 464px; max-inline-size: 100%; max-width: 100%; overflow-wrap: break-word !important; outline: none 0px !important; height: auto !important;"></p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 我国是棉花产量居世界首位的生产大国，棉花种植带大致分布在北纬18度-46度，东经76度-124度之间，气温&gt;=10度，产棉省市区22个，棉田面积在40万公顷以上有7个（新疆，河南，江苏，湖北，山东，河北，安徽）；在10万公顷以上的有4个（湖南，江西，四川，山西）：其他的各省市只有较零星的种植。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 从区域上划分，主要有三大产棉区域，即新疆棉区、黄河流域棉区、长江流域棉区1、新疆棉区&nbsp; 主要包括新疆和甘肃地区，国内主要使用新疆棉。新疆产棉量约占我国棉产量的50%。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 该区日照充足，气候干旱，雨量稀少，属灌溉棉区；耕作制度为一年一熟，棉田集中，种植规模大，机械化程度较高；单产水平高，原棉色泽好，“三丝”含量相对于其他棉区低。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 新疆棉区主要包括南疆和北疆。以前新疆棉花有含糖的问题，现在随着品种的改良，含糖的情况比较少。但新疆棉花纤维强力低于黄河、长江流域棉区，主要是由于回潮率低。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; （1）南疆（以天山为界）： 光照时间长，气温南疆比北疆高，种植时间和采摘时间好。特点是白度好，长度好，一致性也好，而且马克隆值好，主要是A--B2级，细度好，可纺40以上支纱，加工质量比内地好，回潮率低（标准在8.5%），由于气温高，棉花回潮率能达到6-7%左右，棉花都是在三级以上， 比北疆好。另外，我国唯一的长绒棉产区位于南疆阿克苏，长绒棉纤维长度在36-37mm，仅次于埃及长绒棉，比美国皮马棉要好。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; （2）北疆：光照时间比南疆短，阴雨多，水量大，马克隆值低于南疆，强力低，光泽白度比南疆低，以三级为主，水分高，可纺40s -60s纱。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 2、黄河流域</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 黄河流域棉区目前是中国植棉面积较大的棉区，包括河北省（除长城以北）、山东省、河南省（不包括南阳、信阳两个地区）、山西南部、陕西关中、甘肃陇南、江苏、安徽两省的淮河以北地区和北京、天津两市的郊区。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 黄河流域棉区日照较充足，热量条件尚好，土壤肥力中等，年降水量适中，在正常年份下，纤维品质较好。但由于某些地区间作套种的配置不当，病虫危害程度各异，加之有些年份后期的阴雨低温寡照，造成年度间纤维品质不稳定。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 山东、河北棉花相似，颜色好，光泽好，纤维长，短绒率低，强力好，比湖北高一个等级，马克隆值小，可纺40支纱，但三丝多。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 河南除南阳和信阳两地外属于套地种植，生产期短，棉花强力低，细度高，颜色没有山东、河北的好，锯齿加工短绒高，也可以纺40s。南阳和信阳地区不是套种，棉花品质与湖北棉花相似。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 3、长江流域</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 长江流域棉区位于中亚热带湿润区，商品棉生产主要集中在江苏的沿海和沿江棉区，上海的长江口棉区、浙江的钱塘江口棉区、安徽的沿江棉区、江西的鄱阳湖棉区、湖南的洞庭湖棉区、湖北的江汉平原棉区，跨河南、湖北的南襄盆地棉区及四川盆地棉区等地。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;">&nbsp;&nbsp;&nbsp; 其中产棉量比较大的是湖南、湖北。其棉花特点是成熟度好，马克隆值偏大，纤维偏粗，80%以上的棉花马克隆值在4以上，三丝少，短绒率比河南低，颜色发灰，可纺21支，32支纱。</p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p></section><section class="_135editor" data-role="paragraph" id="autoparagraph" style="max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; 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