夏播芝麻营养吸收规律与平衡施肥研究──Ⅰ营养吸收及干物质积累规律

Studies on Nutrient Absorption Rules of Summer Sesame and Its Balanced Fertilization ──Ⅰ. The Rule of Nutrients Absorption and Dry Matter Accumulation

研究了夏播芝麻对氮、磷、钾等９种营养元素的吸收规律及其与干物质积累的关系。结果表明，夏播芝麻在不同生育阶段各器官的营养元素含量与分配状况不同。在全生育期内营养器官中的各元素含量前期高后期低，生殖器官中的元素含量则一直增加。磷、钙、锌和铜在花期～封顶期吸收积累量最多，与芝麻干物质积累基本同步；而氮、钾、镁、锰和铁的吸收超前于干物质积累，在苗期～花期阶段积累达到高峰）。施肥影响各营养元素在体内的含量、积累与转移。

The absorption rules of 9 kinds of nutrients and dry matter accumulation of summer sesame and their correlations were studied. The results indicated that the content of nutrients and its distribution in each organ varied with the process of duration.The value was higher in earlier stage but lower later in vegetative organs and increased gradually in reproduction organs.The accumulation of P,Ca, Zn and Cu synchronized with that of dry mattetr of summer sesame, appearing accumulation peak during flowering-stem lengthening stage.But that of N,K, Mg, Mn and Fe were ahead of dry matter accumulation, and the peak value raised during seedling-flowering stage.This correlated with the physiological-biochemical functions of each nutrient element.Fertilization affected the content, accumulation and distribution of each kind of nutrient in plant.