核桃(Juglans regia L.)实生苗起苗时,常常看到苗子根、干部位出现种种畸形弯曲的现象,如Z字形、弧形、钩形、根颈区带结以及曲折成图形等等。这些畸形现象会严重地影响到种植材料的质量和成长树木的生活力、寿命及产量。根据前人的资料,早已确定,核桃实生苗出现这些畸形现象同播种时核果在土壤中的摆法有关。但是,到底怎样摆才好,研究家们所报导的播种技术资料是非常不一致的。 At the seedling stage of seedlings of Juglans regia L., we often see all kinds of malformations such as zig-zag, arc, hook, root-neck zone knot and tortuous pattern in the root and stem of seedling. These deformities can seriously affect the quality of planting materials and the viability, life span and yield of growing trees. According to previous data, has long been identified, walnut seedlings emergence of these deformities with the sowing of stone in soil sowing law. However, in the end how to put it well, the researchers reported sowing technical information is very inconsistent.