辽宁省属特早熟棉区,主要表现为大陆型气候特点,干旱少雨,无霜期短,热量资源不足。所以棉花单产一直不高不稳。但自推广地膜覆盖栽培技术以来,不仅相应地弥补了这个地区自然条件的不足,使自然条件、经济优势和技术措施三者得到了很好的 Liaoning Province is a very early cotton area, mainly for the continental climate characteristics, drought, frost-free period is short, insufficient thermal resources. Therefore, cotton yield has not been high and unstable. However, since the promotion of plastic film mulching cultivation technology, not only the lack of natural conditions in the region has been made up accordingly, but the natural conditions, economic advantages and technical measures have been well achieved