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在容器育苗过程中,由于育苗容器的容积小于苗木根系在苗床上所占有的体积,给幼苗对养分的吸收和利用带来了很大的限制。加拿大的试验结果表明:裸地苗床上一株根长为20cm的苗木所占据的土壤体积为700cm~3,而一般生产中使用的容器容积仅为200cm~3左右。因此,在培育容器苗时,按苗木不同生长发育阶段,适时、适量施肥是十分必要的。本文只论及氮、磷二元素不同施用量对兴安落叶松容器苗生长的影响。
In the process of container seedling raising, the capacity of the seedling raising and nutrient absorbing has been greatly limited because the volume of the seedling raising container is smaller than the volume occupied by the seedling root in the seedbed. The test results in Canada show that the nursery seedbed occupies a soil volume of 700 cm -3 for a root length of 20 cm, whereas the volume of a container used for normal production is only about 200 cm -3. Therefore, the cultivation of container seedlings, seedlings according to different stages of growth and development, timely, appropriate amount of fertilizer is very necessary. This article only discusses the nitrogen and phosphorus two different application rates of Larix gmelinii container seedling growth.