几种不同品种油茶林钾素的分配规律

Distribution rule of K element in different varieties of Camellia oleifera forests

为了探索不同品种油茶林钾素的分配规律,以指导油茶林的科学施肥,在江西省吉安市永丰县藤田镇,以7年生的长林53、长林27、长林40系列油茶为研究对象,采用随机区组试验,研究了不同品种油茶林地土壤和油茶叶片及果实中钾素含量的分配规律。结果表明:油茶新生叶片的钾素含量最高,随着生长期的延续,钾素慢慢转移到其他组织和器官,导致其含量逐步降低,而且长林27号油茶叶片钾素含量的变化规律不同于长林53号和长林40号;油茶的生殖生长和营养生长对速效钾的需求不同,其中营养生长的需求更高,3个品种油茶林对土壤速效钾的需求有所不同,长林40号生长所需的钾素要高于长林53号和长林27号;油茶果实的钾素积累来自于其它组织器官,3个油茶品种成熟果实的钾素含量无显著差异。

In order to explore K element distribution in different varieties of Camellia oleifera forests, and guide scientific fertilization of C. oleifera forests, at Tengtian Town of Yongfeng County, Ji＇an City, by using randomized block experiment design, taking 7-year-old Changlin No.53, No.27 and No.40 strains of C. oleifera as study objects, distribution rule of K element in soil, leaves and fruits from different varieties of C. oleifera forest was researched. The results show that the K content in new leaf is the highest, and then gradually decreased because K element is slowly transferred to other tissues and organs with growth. Change rule of K content in leaves of Changlin No.27 is different from the others. The demands for available K at reproductive and vegetative growth stages of C. oleifera are different, and the demand is higher at vegetative growth stage. The demands for soil available K of the three varieties of C. oleifera are different, and the demand of Changlin No.40 is higher than the others. K accumulation in fruit is from other tissues and organs, and K contents in mature fruits of three varieties have no significant difference.