The experiment studied on some ecologic factors of cotton by water-osmosis plastic membrane (WOPM), and which effect on physiological properties and the yield of cotton that have engaged in initial studies. The result showed that : 1. The water content of soil covered by WOPM was higher than the other two seeding methods , which due to WOPM could make rain penetrate into soil , and prevent water evaporation from top soil. WOPM increased soil temperature, modified the maximum temperature for soil, ventilated soil, and facilitated soil ventilation, and to make soil structure rationally and soil moisture steadily. 2. WOPM improved to ecologic environment of cotton field. Cotton plant resistance to stress heightened under WOPM, cotton covered by WOPM improved further the latent potentialities for increasing production. 3. In the early-maturing cotton region of the northern part of China, the yield of ginned cotton covered by WOPM was higher than the other two treatments. In the familiar condition to those of the experiment, the yield of lint covered by WOPM was 22.3 percent higher t than that of covered by traditional plastic film, was 12.1 percent higher than that of the cotton uncovered, and the main reason was improved lint. 4. In the same conditions, the total amount water consumption of cotton covered by WOPM was lower than that of the other two treatments. Water utilization was higher than that of the other two seeding methods.
