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于初夏对苹果和梨苗喷布 PP528〔乙基5(4—氯苯)—2H—4唑—2—醋酸盐〕,可促其在苗圃的第一年即发生付梢。药剂浓度以25—50PPm 为宜,100PPm 或更高的浓度往往会杀伤新梢顶端分生组织,并阻碍当年新梢的延续直立生长。虽木(?)定付梢的角度,但据观察当顶端分生组织未被杀伤时,付梢的角度大。反之,顶端分生组织被杀伤,则最顶端那个付梢的角度就小。喷布2次(问隔期为2周)25或50PPmPP528,往往比仅喷1次的更有效。植株的年龄和生长的整齐度以及于生长活跃期唢布,对产生数量最多的付梢并处在适宜的部位均是重要的。2个非短枝型元帅品种上唢布 PP528,此用在“俄冈矮生”(Oregen Spur Delicious)上能促发更多的付梢,付梢数分别为其对照值的9倍和3倍。在甜樱桃上即便 PP528的唢布浓度达到200PPm 仍无效。追唢100或250PPm 赤霉酸未能克服高浓度 PP528抑制生长的作用。
PP528 [ethyl 5 (4-chlorophenyl) -2H-4-oxazole-2-acetate] was sprayed on apple and pear seedlings in early summer to promote shoot emergence in the first year of nursery. Concentration of 25-50PPm agent is appropriate, 100PPm or higher concentration will often kill the top of the shoots of meristematic tissue, and hinder the continuation of the new shoots of the erect growth. Although the wood (?) Settled perspective, but it was observed when the top meristem is not killed, the pay tip angle. Conversely, the top meristem is killed, then the top of the pay tip angle is small. Spray 2 times (ask every 2 weeks) 25 or 50PPmPP528, often than just spray 1 more effective. The age of the plants and the uniformity of their growth as well as the vigorous growth of the sliver fabrics are important to produce the highest number of shoots and where appropriate. Two non-spiked marshalled varieties, Umbrela PP528, were used in “Oregen Spur Delicious” to trigger more shoots at 9 times their control values And 3 times. In sweet cherry even PP528 tar cloth concentration reached 200PPm still invalid. Pursuit of 100 or 250PPM gibberellic acid failed to overcome the high concentration of PP528 inhibit growth.