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在河北黑龙港生态区,棉花是主要经济作物之一,以春直播棉为主要种植形式,常年种植面积40万～47万公顷,其中旱地棉占65%以上 旱地棉由于无水浇条件或水浇条件差,不能保证干旱时及时供水补水,而主要由土壤贮水和降雨供给棉花生长发育。因此,在棉花各个生育阶段都可能出现不同程度的水分亏缺。并且旱地多土壤瘠薄,管理粗放,致使棉花产
In the ecological zone of Heilonggang in Hebei Province, cotton is one of the major cash crops. Spring cotton is the main planting form. The perennial planting area is 400,000-470,000 hectares, of which dryland cotton accounts for more than 65% of the dry land cotton due to no watering conditions or water Poor pouring conditions, can not guarantee timely supply of water replenishment drought, and mainly by the soil water and rainfall supply cotton growth and development. Therefore, different levels of water deficit may occur in all stages of cotton growth. And dry land and more barren soil, extensive management, resulting in cotton production