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| 1 | 磷肥对不同结实能力马尾松无性系雌球花量及针叶氮磷营养的影响显示文摘为实现马尾松无性系种子园精准施肥和丰产经营,用不同结实能力无性系作为材料,设置每株0、400、800和1600 g 4个磷肥水平(分别记为P_(0)、P_(4)、P_(8)和P_(16)),分别在花原基形成前和球果采摘后施肥,研究磷肥对马尾松无性系雌球花量的影响,以及花原基形成期和球花分化前期不同高度的针叶N、P含量的变化。结果表明:与P_(0)处理相比,P_(8)和P_(16)处理显著提高马尾松无性系雌球花量,2018年增幅分别为67.4%和61.2%,2019年增幅分别为28.9%和14.1%。雌球花量与针叶N含量和N/P呈显著负相关,与P含量呈显著正相关。不同结实能力无性系针叶N、P含量对P肥的响应存在差异。花原基形成期,结实能力弱的无性系N含量高,N/P值在11.5~12.5;结实能力强的无性系P含量高,N/P值在9.5~10.5,且在此时期大多数无性系在P8处理下P含量最高,N/P最低。球花分化前期,两种无性系N/P值分别在15.3~17.0和13.2~15.1。无性系上部针叶P含量显著高于中部和下部,而N/P显著低于中部和下部。综上,每株施800 g磷肥可提高不同结实能力无性系花原基形成期针叶P含量,降低N/P,有利于雌球花的形成,对提高无性系种子园产量具有促进作用。 | 郑一 张振 范金根 童庆元 陈胜龙 许志琪 周志春 | 2021 | 应用生态学报2021，32，4： | 4 |
| 2 | 接种五种根系真菌对油松幼苗促生效应的研究显示文摘【目的】探索根系共生真菌对北方重要园林绿化树种油松(Pinus tabulaeformis)的生理生态效应。【方法】设置油松接种牛肝菌属Suillus sp.(Su)、福廷瓶头霉Phialocephala fortinii(Pf)、须壳孢属Pseudopyrenochaeta sp.(Ps)、短梗蠕孢菌Pleotrichocladium opacum(Po)、斯氏曲霉Aspergillus spelunceus(As)和不接种对照(CK)处理,测定各处理油松幼苗的营养生长、根系形态、元素含量和土壤养分的含量等。【结果】①与CK相比,接种Su显著提高了油松幼苗地径、地上和地下部分生物量,分别提高了30.00%、31.57%和47.37%;而接种Pf显著提高了幼苗的株高和地下生物量,分别提高了3.99%和36.84%;接种Ps显著提高了幼苗株高和地径,分别提高了10.96%和15.00%;接种Po的幼苗株高、地径和地上生物量均低于CK植株,接种As的幼苗株高及地上和地下生物量显著低于CK植株。②菌根生长响应的结果表明,接种Pf、Ps和Su对油松幼苗生长具有正效应,且接种Su对油松幼苗的促进作用最大,而接种Po和As时菌根生长响应为负值,对植株生长产生了抑制效应。③接种Pf苗木根系的总根长和表面积,较CK分别显著提高了29.13%、22.16%;接种Ps苗木根系的总根长和表面积,较CK分别显著提高了24.20%、20.19%;接种Su显著增加了苗木根系的体积,较CK显著提高了79.55%。④与CK相比,接种Pf和Su显著提高了苗木的地上和地下部分N、P、K含量,而接种As的植株地上和地下部分N、P含量显著低于CK。⑤接种Pf和Su处理显著提高了土壤硝态N、铵态N、速效P和速效K的含量,而接种As处理的土壤铵态N、速效K的含量显著低于CK,不同菌株之间对土壤养分含量的影响表现出一定差异。【结论】接种Pf和Su对油松幼苗的促生效应较强,在油松育苗栽培中具有较好的应用潜力。 | 徐玲洁 郑妍妍 冯花蕾 周勇 | 2022 | 西南农业学报2022，35，4： | 3 |
| 3 | Clonal variations in cone,seed and nut traits in a Pinus koraiensis seed orchard in Northeast China显示文摘Korean pine(Pinus koraiensis Siebold&Zucc.)in Northeastern China has been genetically improved to increase seed yields in addition to timber.To assess seed yield variability and select highly productive clones,14 cone,seed and nut traits were measured and analyzed.Variance analysis showed that all clones were signifi cantly different in various traits(P<0.01).Phenotypic coeffi cients of variation and repeatability of traits ranged from 9.1 to 34.4%and from 27.5 to 97.7%,respectively.Except for the cone layer and cone seed numbers,the other traits were positively or negatively correlated.Three principal components were identifi ed.Seed and nut traits were the most important traits in the fi rst principal component,and cone traits more important in the second.Using correlation and principal component analyses,cone number and other traits were selected to evaluate materials.Twenty-two clones were selected using a selection rate of 10%based on cone number independently or other combined traits.The genetic gain for diff erent traits ranged from 6.2 to 24.3%.The selected elite clones can supply seedlings for reforestation and the selection method can provide a theoretical basis for selection in other conifer species. | David Kombi Kaviriri Yuxi Li Dawei Zhang Hongtao Li Zuoyi Fan Jingyuan Wang Lianfu Wang Qi Wang Deqiu Wang Vincent L.Chiang Xiyang Zhao | 2021 | Journal of Forestry Research2021，32，1： | 3 |
| 4 | Genetic variation of wood tracheid traits and their relationships with growth and wood density in clones of Pinus tabuliformis显示文摘To improve wood quality for pulpwood industries, it is important to examine not only wood density but also its components, especially tracheid characteristics.We studied genetic variations in the following tracheid traits by earlywood(EW) and latewood(LW): tracheid length(TL),double wall thickness(WT), radial lumen diameter(R_D1), tangential lumen diameter(T_D1), radial central diameter(R_D2), and tangential central diameter(T_D2).We also studied the relationship with the following growth traits: diameter at breast height(DBH), height(H), crown breadth south-north axis(NSC), crown breadth east–west axis(EWC), ring width(RW), latewood percentage (LWP), and wood density(WD).All sample materials were collected from a 33-year old clonal seed orchard of Pinus tabuliformis Carr.Genetic variation among clones was moderate for all tracheid traits, 9.49–26.03%.Clones significantly affected WT, R_D1, R_D2, T_D1, T_D2, and the two ratios WT/R_D1 and TL/T_D2 in EW but had no effects in LW.Clones significantly affected TL in LW but had no effects in EW.H2/C was higher in LW(0.50) than in EW(0.20) for TL, while H2/Cwas higher in EW(0.27–0.46)for other tracheid traits and the two ratios(TL/T_D2 and WT/R_D1) than in EW(0.06–0.22).WD and TL were significantly positively correlated, but WT and TL were negatively correlated both at individual and clone levels;all tracheid diameters and the four ratio values(EW_WT/R_D1, LW_WT/R_D1, EW_TL/T_D2 and LW_TL/T_D2), were strongly positively correlated with DBH, H,NSC, WEC and RW, and strongly negatively correlated with WD both at individual and clone levels.The most important variables for predicting WD were LW_TL,EW_WT and R_D1 in both EW and LW(r^2= 0.22).Selecting the top 10% of the clones by DBH would improve DBH growth by 12.19%(wood density was reduced by 0.14%) and produced similar responses between EW and LW for all tracheid traits: a reduction of0.94 and 3.69% in tracheid length and increases in tracheid diameters(from 0.36 to 5.24%) and double wall thickness(0.07 and 0.87%).The two ratios WT/R_D1 and TL/T_D2 across tissues(EW and LW) declined 0.59 and 4.56%,respectively.The decreased tracheid length and the ratio between tracheid length and diameter is disadvantageous for pulp production.The unfavorable relationship of tracheid traits with wood density indicate that multiple trait selection using optimal economic weights and optimal breeding strategies are recommended for the current longterm breeding program for P.tabuliformis. | Fangqun Ouyang Jianwei Ma Sanping An Junhui Wang Yuhui Weng | 2018 | Journal of Forestry Research2018，29，4： | 1 |
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