【作者】 顾曼如； 彭福田； 姜远茂； 何承顺；

【Author】 Gu Manru,Peng Futian,Jiang Yuanmao,He Chengshun( Depart ment of Horticulture, Shandong Agricultural University, Taian 271018)

【机构】 山东农业大学园艺系；

【摘要】 对盆栽苹果树施H₃¹⁰BO₃,于主要物候期测定,结果表明,生长季地上部全B的变化呈双峰曲线,根系仅出现一次高峰;枝条与粗根皮层的全B量一般比木质部高3～4倍,但从肥料中吸收的B占全B量的百分率（Bdff%）二者相差无几.地上部新生器官在新梢旺长期Bdff%值迅速提高,其后处于高水平的相对稳定期,细根随时间进展不断下降,粗根则缓慢上升.秋施¹⁰B肥后的第三年花期测定植株不同器官的Bdff%值仍可达12.7%～33.6%,而土壤仅为4.2%,并且¹⁰B在植株中的分布发生了变化,一年生枝与粗根含量显著上升,约比翌年同期增加2倍左右,而主干与细根含量显著下降,说明硼肥在树体内具有长效作用,可再利用.更多还原

【Abstract】 The apple trees （ CV. Liaofu/M. prunifulia Borkh） in pot culture were applied with H3¹⁰BO3 with 93.3% abundance at B 2.0mg ·kg^-1 soil in the autumn of 1991.The plant and soil were sampled from the spring of 1992 to the spring of 1993. The results showed that, the change of total boron indicated in a bimodal curve in aerial part during growing season and unimodal curve in root. The total boron in cortex of thick root, shoot and trunk was 3⁴ times higher than that in xylem,but the percentage of the¹⁰B absorbed from¹⁰ B fertilizer in total boron （Bdff%） showed no significant difference between them. Bdff% value of new organs above ground rised sharply in shoot rapid growth period, and then it remained at a high level. Bdff% value in fineroots decceased with advance of time, but increased slowly in thick roots.The Bdff% value in different organs in third year after B applied in autumn was still 12.7% 33.6% , while only 4.2% in soil. More over, distribution of B in plants changed.The¹⁰B in the one - year - old shoots and thick roots in the 1993 was 2 times higher than that at the sametime in 1992.Trunk and fine roots was significantly lower, which indicated that B in plant tissue could be reused, and it had a long effect.更多还原