截干强度对红松结实的影响

Effect of Truncation Intensity on the Fruiting of Pinus koraiensis

为探讨截干强度对红松人工林结实的影响,2017年在通化县三棚林场19年生红松人工林内设置了4个截干强度(截干3轮枝、截干4轮枝、截干5轮枝,CK),2022年和2023年分别对所有处理下结实情况进行调查和分析。结果表明:截干后,红松结实株率、单株平均球果数量和产量与对照相比,均有显著增加(P<0.05),红松单个球果平均质量无明显变化。截干3轮枝时,红松结实株率最高,比CK提高了145.56%;截干5轮枝时,单株平均球果数量和产量最高,比CK分别提高了300.34%和468.04%。

In order to explore the effect of truncation intensity on the fruiting of Pinus koraiensis plantation,four truncation intensities(truncated by third round branches from top,by fourth round branches from top,by fifth round branches from top,and CK)were set up in the 19-year-old P.koraiensis plantation in Sanpeng Forest Farm of Tonghua County in 2017.The fruiting situations under different treatments were investigated and analyzed in 2022 and 2023.Compared with CK,the seed setting rate,average number of cones per plant and yield after truncation increased significantly(P<0.05).There was no significant change in the average weight of single cone.When the plant was truncated by third round branches from top,the seed setting rate was the highest,which was 145.56%higher than that of CK.When the plant was truncated by fifth round branches from top,the average number of cones per plant and yield were the highest,which were 300.34%and 468.04%higher than those of CK,respectively.