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我省梨园面积广大,大部分位于红壤丘陵,普遍存在早期落叶和发秋梢、开秋花现象。为此,几年来我们在吉安地区金坪园艺场进行了有关这方面情况的调查,现简要报导如下。 1.早期落叶现象及其原因 (1)伏秋干旱伏秋干旱的有无、迟早、长短和轻重,与落叶的时间、速度和程度密切相关。一般有伏旱的年份,明月和博多青梨品种反应尤为敏感,提早于7月底—8月上旬即开始落叶。伏旱不明显的年份(1974),它们的叶片一般9月上旬才脱落,两者相差1—1.5个月。
Liyuan large area in our province, most of them located in the red soil hills, there are widespread early autumn and autumn hair, open autumn flowers phenomenon. For this reason, we conducted a survey on the situation in Jinping Horticultural Area in the Ji’an area in the past few years, and are briefly reported as follows. 1. Early deciduous phenomenon and its causes (1) autumn volt autumn volt autumn drought, sooner or later, length and severity, and deciduous time, speed and degree are closely related. Generally have a drought years, the moon and bhopal pear varieties are particularly sensitive to the reaction, ahead of the end of July - early August that leaves began to deciduous. Volatile drought in the year (1974), their leaves generally fall off in early September, the difference between the two 1-1.5 months.