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小国光苹果的采前裂果是生产上较普遍存在的问题之一。在我场条件下,一般年份裂果占60～70％,而严重年份裂果可达90％以上。每年伴随着果实开始着色(9月中旬～下旬),而出现裂果,其表现为:初期果点突起,木栓化,进而开裂。一般裂口不到1厘米长,重者可裂4～5厘米。裂果严重地影响果实外观和贮藏性能。由于果肉裸露,较大的裂口多染病腐烂。这就直接影响了果实的品质和产量。对此,我们从75年开始在本场四队用生长抑制剂B—9进行防止小国光裂果试验。
Small country apple pre-harvest cracking is one of the more common problems in production. In my field conditions, the average annual crack fruit accounted for 60 to 70%, while severe cracking in the year up to 90%. Each year with the fruit began to color (mid-September to late), and the emergence of cracked fruit, its performance as follows: the initial fruit point protruding, wood bolt, and then cracking. General crack less than 1 cm long, heavy can be split 4 to 5 cm. Cracking severely affects fruit appearance and storage properties. Larger breaches become infected and decayed due to the nudity of the flesh. This directly affects the quality and yield of the fruit. In this regard, we have been in the field since the beginning of the fourth team with the growth inhibitor B-9 to prevent small light photopsy test.