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通过对引进的4个柳树新品种生长节律的调查研究表明:各新品种扦插当年平茬后才能表现出品种自身特性的芽萌发成条能力;平茬第1年4个品种的高和地径在整个生长期内均有1个生长锐减期,795、172、799高生长速生期集中在5月和7、8月,杞柳处于6月中、下旬和8月上、中旬;4品种地径速生期均为5月和7月下旬至8月中旬,与华北地区水、热高峰期的分布基本同期。不同的密度设计对各品种的生长量有着明显的影响,而对高和地径生长节律的走势没有明显影响。
Through the investigation on the growth rhythm of four new willow species introduced, it showed that the germination capacity of the buds of each new variety was the same after cutting the same year; the height and diameter of four varieties in the first year of stubble During the whole growth period, there was a sharp decline in growth, 795,172,799 high growth and fast growth period concentrated in May and July, August, willow willow in mid-June, late August and August, middle; 4 varieties The mean annual growth rates were from May and late July to mid-August, basically the same as the distribution of water and heat peaks in North China. Different density design had a significant effect on the growth of all varieties, but had no significant effect on the rhythm of height and diameter growth.