广西糖料蔗小管出流灌溉方式不同灌溉定额研究成果分析

Research on Guangxi irrigation quotas of sugarcane tubular flow irrigation mode

通过小管出流灌溉方式,采用不同灌溉定额:150 m3/亩、250 m3/亩、350 m3/亩,研究不同灌溉定额条件下糖料蔗的出苗率、分蘖率、株高、茎粗、叶面积、蔗汁锤度、水分生存率、水分利用效益等糖料蔗生长指标。试验证明:糖料蔗对养分的吸收强度不仅与养分在土壤中的存在状态有关,还与甘蔗不同生长阶段的土壤水分、湿度有关。糖料蔗在不同的生长阶段对灌水量也有不同的要求,在不同时期对糖料蔗进行有效、合理的灌水,对糖料蔗的生长发育起着极其重要的作用。而在250 m3/亩灌溉定额条件下,更能促进糖料蔗的生长发育,从而提高糖料蔗的品质形状和产量。

In order to study tubular flow irrigation mode,three kinds of irrigation quotas were designed including150m^3/mu,250 m^3/mu and 350 m^3/mu（15mu=1hectare）. Experiments were conducted to research the growth index-es of sugarcane under different irrigation quotas such as germination rate,tillering rate,plant height,stem diame-ter,leaf area,sugarcane juice brix,water survival rate and water utilization benefits etc. The results of experi-ments demonstrate that nutrient absorption intensity of sugarcane is not only related to the existing state of nutrientin soil,but also related to water content and moisture of soil. Sugarcane planting requires different irrigation waterconsumption in different growth periods,so effective and proper irrigation corresponding to different periods mayplay important role in sugarcane growth. The best irrigation quota is 250 m^3/mu for promoting growth and improvingquality,appearance and yield of sugarcane.