摘要
利用3H-PP333示踪法研究了土施PP333在辽伏苹果幼树体内的分配规律。结果表明,PP333由木质部运输,在韧皮部积累,并向叶片扩散,以短梢中含量最高,长梢叶片中由基向上含量渐多,而中梢叶由基向上渐少,网状吸收根含量少于豆芽状延伸根。上施PP333发挥抑制作用,自施入时起约需1个月,而喷施仅需1周,两者结合抑制效应最佳。当PP333施用过量时,于花后2周喷施100~300PPmGA3,可有效地解除PP333的抑制作用,新梢生长量和叶面积增大,蛋白质合成增强,气孔阻力变小,蒸腾强度变大,微量元素的叶含量发生变化,对果实品质无不良影响。经综合性状比较,以200PPmGA。喷施效果较佳。
H--PP333 was used to' trace distribution of soil--applied PP333 in young apple trees (cv. Liaofu). The results showed that PP333 transported through xylem and accumulated in phloem, then distributed to leaves, in leaves on long shoots increased from base to tip of the shoot and in leaves on mid--long shoots decreased in the same manner, and there was more amount in netted roots than in absorbing roots. PP333 brought into play about one month after soil application and one week after foliage spray. The inhibition effect of excessive PP333 on apple trees was relieved by spraying 100--300 ppm GA3 2 weeks after blooming.GA3 increased shoot growth and leaf area, promoted protein synthesis, lowered stomatal resistance and strengthened transpiration. The treatment brought into change of contents of mineral elements in leaves but did not harm fruit quality. Considering the comprehensive effect, it was better to give GA3 at 200 ppm by foliage spray.
出处
《山东农业大学学报(自然科学版)》
CSCD
1994年第1期1-8,共8页
Journal of Shandong Agricultural University:Natural Science Edition
关键词
PP333
分配
苹果
赤霉素
PP333
distribution
growth inhibition, GA_3
inhibit-relieving