平茬处理对水曲柳苗木生长和光合特性的影响  

Effects of Stumping on the Growth and Photosynthetic Characteristics in Fraxinus mandshurica Seedlings

作　　者：殷东生 李颖 张建瑛 YIN Dongsheng;LI Ying;ZHANG Jianying(Forestry Research Institute of Heilongjiang Province,Harbin 150081,China)

机构地区：[1]黑龙江省林业科学研究所,黑龙江哈尔滨150081

出　　处：《北华大学学报(自然科学版)》2025年第3期381-387,共7页Journal of Beihua University(Natural Science)

基　　金：中央财政林业科技推广示范项目(黑[2023]TG30号)。

摘　　要：以1 a生水曲柳播种苗为研究对象,设置留茬0 cm(H1)、5 cm(H2)、10 cm(H3)和不平茬(CK)4种处理,研究平茬处理对水曲柳播种苗生长和光合特性的影响,探索提高水曲柳苗木质量的最佳留茬高度。结果表明:平茬处理显著促进了水曲柳苗木新枝长、新枝基径、冠幅和叶片生长(P<0.05),显著提高了新枝和叶片的生物量(P<0.05);平茬处理对新枝长和新枝基径生长进程影响明显,均表现为H2处理的生长幅度最大;平茬处理显著提高了水曲柳苗木的净光合速率和叶绿素含量(P<0.05)。熵权法和隶属函数法的综合评价结果表明,平茬处理均能对水曲柳苗木生长和光合特性产生促进影响,最佳留茬高度为5 cm(H2处理)。One-year-old Fraxinus mandshurica sowing seedlings were used as the research object.Four treatments modes were established:0 cm stump remaining(H1),5 cm stump remaining(H2),10 cm stump remaining(H3),and no stumping(CK).The effects of stumping on the growth and photosynthetic characteristics of seedling were investigated to explore the optimal remaining height for improving seedling quality.The results showed that stumping significantly promoted the growth of new branch length,new branch base diameter,crown width,and leaves of seedlings(P<0.05),and significantly increased the biomass of new branches and leaves(P<0.05).The effects of stumping on the growth process of new branch length and new branch base diameter were obvious,and H2 treatment showing the largest growth amplitude.The stumping significantly increased the net photosynthetic rate and chlorophyll content of seedlings(P<0.05).The comprehensive evaluation results u sin g the entropy weight method and membership function method indicated that stumping can promote the growth and photosynthetic characteristics of Fraxinus mandshurica seedlings,and the optimal remaining height was 5 cm stump(H2 treatment).

关 键 词：水曲柳 平茬 生长特征 光合特性 综合评价 

分 类 号：S723.1[农业科学—林木遗传育种]