麦套春棉麦棉共生期水分变化动态研究

１９９２～１９９３年对麦套春棉麦棉共生期水分变化动态进行了研究。两年试验结果表明，４种套种方式共生期田间持水量变化动态均表现为：棉行间＞棉株间＞麦棉行间＞麦行间；在试验范围内麦棉间距≥０３０ｍ时，无论麦收前有无自然降雨，棉行间、棉株间持水量与纯作棉田（ＣＫ）差异不显著，而麦棉行间、麦行间持水量显著低于ＣＫ；３—２式和４—２式用水较为经济；套种田与ＣＫ持水量等同点分布区集中在距小麦边行０３０～０４０ｍ处，各套种方式麦棉间距以０３０ｍ为宜。

Dynamics of Moisture Change During the Synchtonous Period in the Field of Wheat Interplanted with Spring Cotton

Studies on field moisture capacity dynamics during the synchtonous period of four patterns of wheat interplanted with spring cotton were conducted.All results showed that the dynamic change of inter-cotton rows>that of inter-cotton plants>inter-cotton and wheat rows>inter-wheat rows.In this study,if the distance between wheat and cotton rows was more than 0.3m,the field moisture capacity in the middle of cotton rows or plants would have no significent difference from that in the monoplanted cotton field(ck),wheather it rained or not before wheat harvesting.But in the middle between wheat and cotton rows or wheat rows,it was significently lower than ck.Concerning the water consumption,3-2 and 4-2 patterns were more economic.In interplanted field,the field moisture capacity was equal to ck in the places with the distance of 0.30-0.40m to wheat border row.The optimum distance between wheat and cotton rows is 0.30m in each interplanting pattern.