一、概况为探求临海蔗区秋、冬、春植蔗不同植期的增产潜力,我们于1974～1975年,设置了本试验。试验小区面积为0.9亩,秋、冬、春植区各0.3亩,作顺序排列,行距1米,畦长18米,土壤为熟化的海涂粘质土,土层深厚,肥力较高。供试品种为纳印310。秋植区,于1974年9月2日、9月10日、9月20日分三期下种,均在甘薯地行间套种, I. Overview In order to explore the yield potential of sugarcane harvested in autumn, winter and spring in different planting stages in Linhai, we set this experiment from 1974 to 1975. The experimental plot covers an area of ​​0.9 mu and the area of ​​0.3 mu in autumn, winter and spring planting areas is arranged in sequence with a row spacing of 1 meter and a length of 18 meters. The soil is a matured clay-coated clay with deep soil and high fertility. Test varieties for satisfied India 310. Autumn planting area, on September 2, September 10, September 20, 1974 under the three species, all in sweet potato interplanting,