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一、试验的目的和意义以及国内外研究动态广西地处亚热带,温度和降水条件适合甘蔗生长,为我国蔗糖主要产区之一。但长期以来单产偏低,自然优势没有充分发挥。近两年来,由于落实农业生产责任制,广大社员的种蔗积极性提高,普遍加工加肥,单产提高到2.9吨以上。而蔗糖分却日益降低,如81—82年榨季蔗糖分下降0.82%;混合糖产糖率下降0.83%,82—83年榨季又比上榨季蔗糖分下降1.65%;混合糖产糖率下降1.6%。全区因而少收10多万吨糖。考其原因很多,但施肥不合理是一个重要因素。因
First, the purpose and significance of the experiment and research developments at home and abroad Guangxi is located in the subtropical, temperature and precipitation conditions for the growth of sugarcane, as one of the main producing areas of sucrose. However, the long-term yield is low and its natural advantages are not fully exploited. In the past two years, due to the implementation of the responsibility system for agricultural production, the enthusiasm of the majority of members of sugarcane has been raised and the general processing and fertilizing have been carried out, raising the yield to 2.9 tons or above. However, the sucrose content decreased day by day. For example, the sucrose content in the crop decreased by 0.82% in the period of 81-82; the yield of sugar in the mixed sugar decreased by 0.83%; the yield in the 82-83 year was 1.65% lower than that of the sugar crop in the previous crop season; The rate dropped 1.6%. The region thus received less than 10 million tons of sugar. The test for many reasons, but unreasonable fertilization is an important factor. because