【摘要】 通过钾素供应水平与甘蔗苗期基部混合组织、＋３叶片、＋５叶鞘含钾量以及蔗茎产量之间的关系研究表明：甘蔗幼嫩组织含钾量因土壤供钾水平不同而存在明显差异，株龄３～４月时，＋３叶片全钾及＋５叶鞘汁液水溶性钾含量与土壤速效钾供应水平有显著的相关性。在正常供水条件下（叶片水分含量＞６５％，叶鞘水分含量＞８０％），当苗期基部混合组织汁液水溶性Ｋ＜１７００×１０－６，伸长期＋３叶片全钾（干基）＜１．３５％、＋５叶鞘汁液水溶性Ｋ＜６５０×１０－６时，提高钾素供应水平，蔗株组织含钾量和蔗茎产量都随之提高。这些组织含钾量能反映出钾素营养供应的丰缺状况。更多还原

【Abstract】 Relationship between potassium application and potassium contents of basal mixed tissue of sugarcane seedling stage,+3 leaves,+5 leaf sheaths and yield of sugarcane were studied in this paper. The results are as follows:significant difference in the cane tissue of young stage due to the supply levels of K in the soil.Total K of +3 leaves,+5 leaf sheaths;total K contents of +3 leaves,water-soluble K also shows significant difference since the application of quick effective K in the plant age of 3～4 months.Under the normal water condition(water content of leaf sampling>65%,leaf sheath>80%),water-soluble K contents<1700×10-6 in the basal mixed tissue of seedling stage,total K of +3 leaves<1.35% in the jointing stage,water-soluble K<650×10-6 in the juice of +5 leaf sheaths,when increased the application of K,the potassium contents of cane plant and yield of cane stalks are followed increasing.More or less of the K nutrition is reflected by the contents of plant tissue.更多还原