桂北地区杉木采穗圃促萌技术研究

Promote Germination Technology of Cunninghamia lanceolata Tutting Trchard by Tense Tlanting and Tending Tursery Stock

为提高‘柳299’和‘西山9122’两个品系杉木Cunninghamialanceolata无性系采穗圃的萌条产量,采用L9(34)正交试验方法筛选出压杆程度、定植深度、种植间距三个因素中可以提高萌条产量的高产组合,并对三个因素各自对萌条产量的影响进行分析。结果表明,在所有组合中,2个品系均以压杆程度为茎秆与地面呈20°~30°、定植深度为根颈部以上1~2 cm、种植间距为30 cm×30 cm这一组合萌条产量最高;在此组合条件下,‘柳229’比‘西山9122’能产生更多的合格萌条,其采穗圃有效萌条(长度6 cm以上,无明显偏冠现象)产量可达到45条·株-1以上,有效萌条产量可达390万条·hm-2,适合作为构建杉木采穗圃的母株。

In order to promote the sprout yield of Cunninghamia lanceolata clones ‘Liu 229’ and Xishan‘9122’in the two clonal panicle garden,the L9(34) orthogonal test was used to screen out the high yield combinations that could increase the yield of sprout strips from the three factors of bar pressure, planting depth and planting spacing, and the effects of the three factors on the yield of sprout strip were analyzed.. The results showed that the highest yield combination was that the stalk and the ground were 20 ~ 30 degrees, the planting depth was 1 to 2 cm, and the spacing between planting was 30 cm×30 cm. Under this combination,‘Liu229’can produce more qualified sprouts than‘Xishan 9122’,the effective germination of the Cunninghamia lanceolata(length of 6 cm and no obvious crown deviation) can reach 45 axis per tree or more, the effective sprouting yield per hectare can reach 3.9 million or more, which is suitable for increasing the yield of the sprout of the Cunninghamia lanceolata cutting orchard.