<br><div><section class="_135editor" data-role="paragraph" style="font-size: medium; 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; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　人多地少是山东及周边棉区农村的基本情况，麦棉套种就是在为了提高土地产出和缓解粮棉争地矛盾的实践中发展起来的。经过多年的试验研究和生产实践，麦棉春套已基本形成了３种主要套作方式，即“三二”式、“四二”式和“三一”式种植方式。为提高植棉行的地温和减少小麦对棉花的影响，麦套棉多采用起垄种植。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　“三二”式种植方式是以棉花为主的套种方式，也是当前大多数棉区最常用的套作方式。套种带宽一般１５０厘米，棉花起垄种植，垄高１５厘米，垄上种植２行棉花，垄下种植３行小麦。小麦行距２０厘米，棉麦间距３０厘米，棉花行距５０厘米，收麦后棉花大行行距１００厘米。棉花播种期与常规纯作春棉相同，为提高霜前花率，提倡对棉花进行地膜覆盖。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　“四二”式种植方式是棉麦兼顾的套种方式，适宜在地力较好的地块上应用。套种带宽一般１７０厘米，垄高２５～３０厘米，垄上种两行棉花、垄下种植４行小麦，小麦行距２０厘米、棉麦间距３０厘米，棉花行距５０厘米，收麦后棉花大行行距１２０厘米。棉花播种期与常规纯作春棉相同，为提高霜前花率，提倡对棉花进行地膜覆盖。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　“三一”式种植方式是一种以小麦为主的套作方式，套种带１００厘米左右，种植３行小麦，套种行６０厘米左右，种１行棉花，麦收后棉花成等行距，易于管理。但此方式小麦所占幅宽相对较大，棉花套种行过窄，如进行麦行内播种，棉花受影响太大，霜前花率较低。因此，最好采用棉花育苗移栽种植，棉花４月初育苗，于５月下旬移栽。棉花移栽后有７天左右的缓苗期，此时小麦的遮阴也利于棉花缓苗。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　小麦收割前只有１０天左右真正的共生期，而小麦的后期长势也已大大减弱，对棉花的影响不会太大。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 15px; overflow-wrap: break-word !important; outline: none 0px !important;">　　在选用种植方式时可根据当地种植习惯、耕作水平和粮棉比价灵活运用。在人多地少、地力较好的情况下，可选用“四二”式的种植方式；如地力水平稍差，而且耕地偏少，可选用“三二”式的种植方式；而对于劳力充足、又有育苗移栽习惯的，则可选用“三一”式的种植方式。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; 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="font-size: medium; 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; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; font-family: 微软雅黑, &quot;Microsoft YaHei&quot;, sans-serif; font-size: 17px; caret-color: rgb(255, 0, 0); overflow-wrap: break-word !important; outline: none 0px !important;"></p></section></div>