不同技术措施促进红松结实的效果分析

Effects Analysis of Different Technical Measures on Promoting Yield of Pinus koraiensis

通过采取丛状造林、林木截冠、林分疏伐、人工授粉等不同的技术措施,对红松的结实率和结实量进行调查研究,结果表明：红松丛状造林中3株1丛和5株1丛植生组造林20年后,结实率达70%以上,比单植提高46%;4种不同截冠的处理方法均有明显的促进结实效果,其结实数量比对照提高109%～142%;红松采取疏伐措施,其强度疏伐区（43%）结实率达91%,比对照提高33个百分点,中度疏伐区（32%）结实量最高,比对照提高23%;人工授粉的红松坐果率比未授粉的提高12%～71%。

By taking different technical measures （massive planting ,reproduction by topping of forest trees ,stand thinning ,artificial pollination） to Pinus koraiensis ,the seed setting rate and seed yield were conducted .Result shows that ：afforestation by vegetation group （one clump by three trees one clump by five trees ） 20 years after planting in massive planting Pinus koraiensis plantation ,the seed setting rate are 70% ,which increase by 46% compared with the single planting ;four kinds of treatments of reproduction by topping of forest trees are significantly different all have significant effects of yield ,the yield amount increase by 109%-142% ;adopting thinning method ,the seed set-ting rate of Pinus koraiensis in intensity thinning area （43% ） are 91% ,which increase by 33% than CK ;the seed setting rate of Pinus koraiensis in moderate thinning area （32% ） is the highest ,increase by 23% than CK ;fruit set-ting rate of Pinus koraiensis by artificial pollination increase by 12% -71% compared to that without pollination .