| 摘要: |
| 研究了疏伐对油松种子园母树结实环境、营养生长、结实效果和种子品质的影响。结果表明：①疏伐后园内花期温度（每天10:00~16:00）提高了1 ℃，相对湿度降低了5.9%，花粉量增加了98粒，说明疏伐可以改善通风透光条件，加强了花粉传播；②疏伐3年后母树侧枝生长累计增加了32.6 cm，有效地增大了结实面积；③疏伐使母树雌、雄球花量和单株结实量较对照提高了3.26,2.12和1.66倍；④疏伐后良种的出种率、发芽率和千粒重分别较对照增加了0.46%,3.1%和10.6 g。 |
| 关键词: 油松 疏伐；种子园 结实状况 |
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| 基金项目:陕西省“九五”科技攻关项目(K95-G5) |
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| Thinning of Pinus tabulaeformis seed orchard and analysis of its effect |
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| Abstract: |
| This paper has studied effect of thinning of Pinus tabulaeformis seed orchard on its fruiting,and the results showed that:(1) it raised temperature by 1 ℃ during flowering period in the seed orchard (at 10:00-16:00 everyday),reduced relative humidity by 5.9%,improved aeration and sunlight penetration and enhanced pollen spread;(2) after thinning,accumulated 3-year increment of lateral shoot growth of seed trees increased by 32.6 cm,and it effectively expanded fruiting area;(3) it increased quantity of both female and male flowers,and seed yield by 3.26,2.12 and 1.66 times,respectively,compared with those without treatment;(4) it increased seed percentage,germination rate and 1 000 seed weight by 0.46%,3.1% and 10.6g,respectively. |
| Key words: Pinus tabulaeformis thinning intensity seed orchard fruit-bearing status |
