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(Bdf%)二者相差无几。地上部新生器官在新梢旺长期Bdf%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3年花期测定植株不同器官的Bdf%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。
The apple trees (cv. Liaofu/ M. prunifulia Borkh) in pot culture were applied with H 3 10 BO 3 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 a bimodal curve in aerial part during growing season and an unimodal curve in root. The total boron in cortex of thick root, shoot and trunk was 3~4 times higher than that in xylem, but the percentage of the 10 B absorbed from 10 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 fine roots decreased with advance of time, but increased slowly in thick roots . The Bdff% value in different organs in the third year after B applied in autumn was still 12.7%~33.6%, while only 4.2% in soil. More over, distribution of 10 B in plants changed. The 10 B in the one-year-old shoots and thick roots in 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.
出处
《园艺学报》
CAS
CSCD
北大核心
1998年第2期147-153,共7页
Acta Horticulturae Sinica
基金
山东省自然科学基金
关键词
苹果
硼肥
分布
利用
施肥
Apple tree
B
Distribation
Utilization