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我们从1988年起对本区棉花和玉米两大作物根系的构型、动态建成规律及生产措施对根系的影响等方面做了研究，现简述如下：1材料和方法试验在本校农学试验站完成。棉花供试品种为新陆早1号，设置密度、灌溉和覆膜三组试验。种植方式为60cm＋30cm宽窄行，常规种植密度为666．7m2?
Since 1988, we studied the configuration of the root system of cotton and maize, the law of dynamic establishment and the influence of production measures on the root system of cotton and maize in this area. The research is summarized as follows: 1 Materials and methods The experiment was completed at our agronomy experimental station . Cotton varieties for the test Xinluzao 1, set the density, irrigation and coating three groups of tests. Planting mode is 60cm + 30cm wide and narrow row, the conventional planting density is 666.7m2?