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我们在长期造林实践中发现,有许多树种,其幼树的成活和生长状况都因栽植季节和时间的不同而有所差异。因此,应根据树种的特性来选择较为适宜的造林季节和时期,以提高造林成活率和幼树生长量。本试验仅对大叶白蜡等六个平原造林树种进行了不同时期造林的效果探讨,试图为不同季节造林的树种选择,提供一些参考。一、试验方法(一)供试树种选用我院苗圃培育的大叶白蜡、沙枣、白柳、阿富汗杨和新疆白榆、河南白榆(以种源分) 等六个树种进行试验。苗木规格见表1。(二) 试验方法和技术要求选择春季和秋季两个造林季节。春季仅选一期(最适时间);秋季分三期:早秋期、中秋期和晚秋期。栽植时间和苗木状况见表2。
In the long-term afforestation practice, we found that there are many tree species whose sapling survival and growth conditions are different due to different planting seasons and time. Therefore, according to the characteristics of tree species, we should choose the more appropriate season and period of afforestation in order to improve the survival rate of afforestation and sapling growth. In this experiment, we only discussed the effect of afforestation on six plain afforestation species, such as Larix kaempferi, in different periods, trying to provide some references for the species selection of afforestation in different seasons. First, the test methods (a) for the test species selection nursery nursery Larix tomentosa, date, white willow, Afghan poplar and white elm in Xinjiang, Henan elm (with provenance) and other six species were tested. Seedling specifications in Table 1. (B) test methods and technical requirements Select two spring and autumn afforestation season. Spring only choose a period (the most appropriate time); Autumn is divided into three phases: early autumn, mid-autumn and late autumn. Planting time and seedling status in Table 2.